20-F

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 20-F

(Mark One)

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended 31 December 2017

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                  to                 

OR

☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report                 

Commission file number 0-16350

WPP plc

(Exact Name of Registrant as specified in its charter)

Jersey

(Jurisdiction of incorporation or organization)

27 Farm Street

London, United Kingdom, W1J 5RJ

(Address of principal executive offices)

Andrea Harris, Esq.

Group Chief Counsel

27 Farm Street, London, United Kingdom, W1J 5RJ

Telephone: +44(0) 20 7408 2204

Facsimile: +44(0) 20 7493 6819

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)

Securities registered or to be registered pursuant to Section 12(b) of the Act.

Title of each class	Name of each exchange on which registered
Ordinary Shares of 10p each American Depositary Shares, each representing five Ordinary Shares (ADSs)	New York Stock Exchange

Securities registered or to be registered pursuant to Section 12(g) of the Act.

Not applicable

(Title of Class)

Not applicable

(Title of Class)

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act.

None

(Title of Class)

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report.

At December 31, 2017, the number of outstanding ordinary shares was 1,332,511,552 which included at such date ordinary shares represented by 14,942,978 ADSs.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

YES  ☒    NO  ☐

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

YES  ☐    NO  ☒

Note – Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

YES  ☒    NO  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

YES  ☒    NO  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer, or an emerging growth company. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Emerging growth company	☐

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Exchange Act.    ☐

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

U.S. GAAP  ☐ International Financial Reporting Standards issued by the
International Accounting Standards Board  ☒ Other  ☐

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

Item 17  ☐    Item 18  ☐

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES  ☐    NO  ☒

TABLE OF CONTENTS

			Page
FORWARD – LOOKING STATEMENTS				1
Part I				1
Item 1	IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS			1
Item 2	OFFER STATISTICS AND EXPECTED TIMETABLE			1
Item 3	KEY INFORMATION			1
	A	Selected Financial Data		1
	B	Capitalization and Indebtedness		3
	C	Reasons for the Offer and Use of Proceeds		3
	D	Risk Factors		4
Item 4	INFORMATION ON THE COMPANY			5
	A	History and Development of the Company		6
	B	Business Overview		7
	C	Organizational Structure		11
	D	Property, Plant and Equipment		11
Item 4A	UNRESOLVED STAFF COMMENTS			13
Item 5	OPERATING AND FINANCIAL REVIEW AND PROSPECTS			13
	A	Operating Results		13
	B	Liquidity and Capital Resources		21
	C	Research and Development, Patents and Licenses, etc.		23
	D	Trend Information		23
	E	Off-Balance Sheet Arrangements		23
	F	Tabular Disclosure of Contractual Obligations		24
Item 6	DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES			33
	A	Directors and Senior Management		33
	B	Compensation		36
	C	Board Practices		39
	D	Employees		46
	E	Share Ownership		47
Item 7	MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS			48
	A	Major Shareholders		48
	B	Related Party Transactions		49
	C	Interests of Experts and Counsel		49
Item 8	FINANCIAL INFORMATION			49
	A	Consolidated Statements and Other Financial Information		49
	B	Significant Changes		49
Item 9	THE OFFER AND LISTING			50
	A	Offer and Listing Details		50
	B	Plan of Distribution		51
	C	Markets		51
	D	Selling Shareholders		51
	E	Dilution		51
	F	Expenses of the Issue		51

			Page
Item 10	ADDITIONAL INFORMATION			52
	A	Share Capital		52
	B	Memorandum and Articles of Association		52
	C	Material Contracts		60
	D	Exchange Controls		64
	E	Taxation		64
	F	Dividends and Paying Agents		70
	G	Statements by Experts		70
	H	Documents on Display		70
	I	Subsidiary Information		70
Item 11	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK			71
Item 12	DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES			71
	A	Debt Securities		71
	B	Warrants and Rights		71
	C	Other Securities		71
	D	American Depositary Shares		72
Part II				74
Item 13	DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES			74
Item 14	MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS			74
Item 15	CONTROLS AND PROCEDURES			74
Item 16A	AUDIT COMMITTEE FINANCIAL EXPERT			76
Item 16B	CODE OF ETHICS			76
Item 16C	PRINCIPAL ACCOUNTANT FEES AND SERVICES			76
Item 16D	EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES			77
Item 16E	PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS			77
Item 16F	CHANGE IN REGISTRANT’S CERTIFYING ACCOUNTANT			77
Item 16G	CORPORATE GOVERNANCE			77
Item 16H	MINE SAFETY DISCLOSURE			78
Part III				79
Item 17	FINANCIAL STATEMENTS			79
Item 18	FINANCIAL STATEMENTS			79
Item 19	EXHIBITS			79

Forward-Looking Statements

In connection with the provisions of the Private Securities Litigation Reform Act of 1995 (the Reform Act), the Company (as defined below) may include forward-looking statements (as defined in the Reform Act) in oral or written public statements issued by or on behalf of the Company. These forward-looking statements may include, among other things, plans, objectives, projections and anticipated future economic performance based on assumptions and the like that are subject to risks and uncertainties. As such, actual results or outcomes may differ materially from those discussed in the forward-looking statements. Important factors which may cause actual results to differ include but are not limited to: the unanticipated loss of a material client or key personnel, delays or reductions in client advertising budgets, shifts in industry rates of compensation, regulatory compliance costs or litigation, natural disasters or acts of terrorism, the Company’s exposure to changes in the values of major currencies other than the UK pound sterling (because a substantial portion of its revenues are derived and costs incurred outside of the United Kingdom) and the overall level of economic activity in the Company’s major markets (which varies depending on, among other things, regional, national and international political and economic conditions and government regulations in the world’s advertising markets). In addition, you should consider the risks described in Item 3D, captioned “Risk Factors,” which could also cause actual results to differ from forward-looking information. In light of these and other uncertainties, the forward-looking statements included in this document should not be regarded as a representation by the Company that the Company’s plans and objectives will be achieved.

The Company undertakes no obligation to update or revise any such forward-looking statements, whether as a result of new information, future events or otherwise.

PART I

ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS

Not applicable.

ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE

Not applicable.

ITEM 3. KEY INFORMATION

Overview

WPP plc and its subsidiaries (WPP) comprise one of the largest communications services businesses in the world. At 31 December 2017, the Group had 134,413 employees. Including all employees of associated companies, this figure was approximately 203,000. For the year ended 31 December 2017, the Group had revenue of £15,265 million and operating profit of £1,908 million.

Unless the context otherwise requires, the terms “Company”, “Group” and “Registrant” as used herein shall also mean WPP.

A. Selected Financial Data

The selected financial data should be read in conjunction with, and is qualified in its entirety by reference to, the consolidated financial statements of the Company, including the notes thereto.

The selected income statement data for each of the years ended 31 December 2017, 2016 and 2015 and the selected balance sheet data as at 31 December 2017 and 2016 are derived from the consolidated financial

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statements of the Company that appear elsewhere in this Form 20-F. The selected financial data for prior periods is derived from the consolidated financial statements of the Company previously filed with the Securities and Exchange Commission (SEC) as part of the Company’s Annual Reports on Form 20-F. The consolidated financial statements were prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB).

The reporting currency of the Group is the UK pound sterling and the selected financial data has been prepared on this basis.

Selected Consolidated Income Statement Data

	Year ended 31 December
	2017 £m			2016 £m			2015 £m			2014 £m			2013 £m
Revenue		15,265.4			14,388.9			12,235.2			11,528.9			11,019.4
Operating profit		1,908.2			2,063.1			1,632.0			1,507.3			1,410.3
Profit for the year		1,912.3			1,501.6			1,245.1			1,151.5			1,012.1
Profit attributable to equity holders of the parent		1,816.6			1,400.1			1,160.2			1,077.2			936.5
Earnings per ordinary share:
Basic		144.0	p		109.6	p		90.0	p		82.4	p		72.4	p
Diluted		142.4	p		108.0	p		88.4	p		80.5	p		69.6	p
Earnings per ADS1:
Basic		720.0	p		548.0	p		450.0	p		412.0	p		362.0	p
Diluted		712.0	p		540.0	p		442.0	p		402.5	p		348.0	p
Dividends per ordinary share		59.75	p		48.33	p		42.49	p		35.27	p		30.27	p
Dividends per ADS (US dollars)2		397.23	¢		352.41	¢		340.57	¢		280.73	¢		238.83	¢
1  Basic and diluted earnings per American Depositary Share (ADS) have been calculated using the same method as earnings per share, multiplied by a factor of five. 2  These figures have been translated for convenience purposes only, using the approximate average rates shown in the exchange rate table on page 3. This conversion should not be construed as a representation that the pound sterling amounts actually represent, or could be converted into, US dollars at the rates indicated.

Selected Consolidated Balance Sheet Data

	At 31 December
	2017 £m		2016 £m		2015 £m		2014 £m		2013 £m
Total assets		33,668.7		34,568.3		28,749.2		26,622.9		24,975.5
Net assets		9,962.0		9,767.6		8,015.8		7,826.8		7,846.5
Called-up share capital		133.3		133.2		132.9		132.6		134.9
Number of shares (in millions)		1,332.5		1,331.9		1,329.4		1,325.7		1,348.7

Dividends

Dividends on the Company’s ordinary shares, when paid, are paid to share owners as of a record date, which is fixed by the Company. The following table sets forth the amounts of interim or first interim, final or second interim and total dividends paid on the Company’s ordinary shares in respect of each fiscal year indicated. In the United States, the Company’s ordinary shares are represented by ADSs, which are evidenced by American Depositary Receipts (ADRs) or held in book-entry form. The Group uses the terms ‘ADS’ and ‘ADR’

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interchangeably. The dividends are also shown translated into US cents per ADS using the approximate average rates as shown in the exchange rate table below, for each year presented.

	Pence per ordinary share						US cents per ADS
In respect of the year ended 31 December:	Interim or First Interim		Final or Second Interim		Total		Interim or First Interim		Final or Second Interim		Total
2013		10.56		23.65		34.21		82.61		185.01		267.62
2014		11.62		26.58		38.20		95.72		218.95		314.67
2015		15.91		28.78		44.69		121.62		219.99		341.61
2016		19.55		37.05		56.60		132.42		250.96		383.38
2017		22.70		37.30		60.00		146.27		240.34		386.61

The 2017 interim dividend was paid on 6 November 2017 to share owners on the register at 6 October 2017. The 2017 final dividend will be paid on 9 July 2018 to share owners on the register at 15 June 2018.

Exchange rates

Fluctuations in the exchange rate between the pound sterling and the US dollar will affect the dollar equivalent of the pound sterling prices of the Company’s ordinary shares on the London Stock Exchange and, as a result, are likely to affect the market price of the ADSs in the United States. US dollar amounts paid to holders of ADSs also depend on the sterling/US dollar exchange rate at the time of payment.

The following table sets forth for each of the most recent six months, the high and low exchange rates between the pound sterling and the US dollar. As at 24 April 2018, the closing exchange rate was 1.3977.

Month ended	High		Low
31 October 2017		1.3395		1.3055
30 November 2017		1.3509		1.3055
31 December 2017		1.3524		1.3315
31 January 2018		1.4256		1.3501
28 February 2018		1.4231		1.3785
31 March 2018		1.4222		1.3735

The annual average exchange rates between the pound sterling and the US dollar for each of the five years ended 31 December were:

Year ended 31 December	Average
2013		1.5646
2014		1.6475
2015		1.5288
2016		1.3547
2017		1.2887

B. Capitalization and Indebtedness

Not applicable.

C. Reasons for the Offer and Use of Proceeds

Not applicable.

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D. Risk Factors

The Company is subject to a variety of possible risks that could adversely impact its revenues, results of operations, reputation or financial condition. Some of these risks relate to the industries in which the Company operates while others are more specific to the Company. The table below sets out principal risks the Company has identified that could adversely affect it. See also the discussion of Forward-Looking Statements preceding Item 1.

Principal risk	Potential impact
Clients
The Group competes for clients in a highly-competitive and evolving industry which requires agency groups to offer seamlessly integrated services. Client loss to competitors or as a consequence of client consolidation or a reduction in marketing budgets due to economic conditions may have a material adverse effect on the Group’s market share and its business, revenues, results of operations, financial condition or prospects.	The competitive landscape in our industry is constantly evolving. Competitors include multinational advertising and marketing communication groups, regional and national marketing services companies, database marketing and modelling companies, telemarketers, information and measurement, social media and professional services and advisory firms and consulting internet companies. Client contracts can generally be terminated on 90 days’ notice or are on an assignment basis and clients put their business up for competitive review from time to time. The ability to attract new clients and to retain or increase the amount of work from existing clients may be impacted by a failure by the Group to react quickly enough to changes in the market and to evolve its organisational structure and by loss of reputation and may be limited by clients’ policies on conflicts of interest. The global economy continues to be volatile with uncertainties such as those caused by Brexit in the UK and Europe and technological disruption from disintermediators in certain sectors. In the past clients have responded to weak economic and financial conditions by reducing their marketing budgets which are easier to reduce in the short term than their other operating expenses.
The Group receives a significant portion of its revenues from a limited number of large clients and the net loss of one or more of these clients could have a material adverse effect on the Group’s prospects, business, financial condition and results of operations.	A relatively small number of clients contribute a significant percentage of the Group’s consolidated revenues. The Group’s 10 largest clients accounted for 14.9% of revenues in the year ended 31 December 2017. Clients generally are able to reduce advertising and marketing spend, terminate contracts, or cancel projects on short notice. The loss of one or more of the Group’s largest clients, if not replaced by new client accounts or an increase in business from existing clients, would adversely affect the Group’s financial condition.
Cyber and data security
The Group is subject to strict data protection and privacy legislation in the jurisdictions in which it operates and relies extensively on information technology systems. The Group stores, transmits and relies on critical and sensitive data such as strategic plans, personally identifiable information and trade secrets. Security of this type of data is exposed to escalating external threats that are increasing in sophistication as well as internal data breaches. Existing and new data protection laws, in particular the General Data Protection Regulation (GDPR) and E-privacy regulation in the EU concerning user privacy, use of personal information, consent and online tracking may restrict some of the Group’s activities and increase costs. The Group is carrying out an IT Transformation project and is reliant on third parties for the performance of a significant portion of its worldwide information technology and operations functions. A failure to provide these functions could have an adverse effect on the Group’s business. During the transformation, the Group is still reliant on legacy systems which could restrict the Group’s ability to change rapidly.	The Group may be subject to investigative or enforcement action or legal claims or incur fines, damages, or costs and client loss if the Group fails to adequately protect data or observe privacy legislation in every instance. A system breakdown or intrusion could have a material adverse effect on the Group’s business, revenues, results of operations, financial condition or prospects.

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Principal risk	Potential impact
Financial
The Group is subject to credit risk through the default of a client or other counterparty.	The Group is generally paid in arrears for its services. Invoices are typically payable within 30 to 60 days. The Group commits to media and production purchases on behalf of some of its clients as principal or agent depending on the client and market circumstances. If a client is unable to pay sums due, media and production companies may look to the Group to pay such amounts to which it committed on behalf of those clients.
Operational
The Group’s performance could be adversely impacted if it failed to ensure adequate internal control procedures are in place in relation to the Group’s media trading.	Failure to ensure that trading activities are compliant with client obligations where relevant could adversely impact client relationships and business volumes.
People and succession
The Group’s performance could be adversely affected if it does not react quickly enough to changes in its market and fails to attract, develop and retain key creative, commercial and management talent at the parent and operating companies, including but not limited to long-serving members of the management team.	The Group is highly dependent on the talent, creative abilities and technical skills of our personnel as well as their relationships with clients. The Group is vulnerable to the loss of personnel to competitors and clients leading to disruption to the business.
Regulatory, sanctions, anti-trust and taxation
The Group may be subject to regulations restricting its activities or effecting changes in taxation.	Changes in local or international tax rules, for example prompted by the OECD’s Base Erosion and Profit Shifting project (a global initiative to improve the fairness and integrity of tax systems), changes arising from the application of existing rules, or new challenges by tax or competition authorities, for example, the European Commission’s State Aid investigation into the UK CFC rules, may expose the Group to significant additional tax liabilities or impact the carrying value of our deferred tax assets, which would affect the future tax charge.
The Group is subject to strict anti-corruption, anti-bribery and anti-trust legislation and enforcement in the countries in which it operates.	The Group operates in a number of markets where the corruption risk has been identified as high by groups such as Transparency International. Failure to comply or to create a corporate environment opposed to corruption or failing to instil business practices that prevent corruption could expose the Group and senior officers to civil and criminal sanctions.
The Group is subject to the laws of the US, the EU and other jurisdictions that impose sanctions and regulate the supply of services to certain countries.	Failure to comply with these laws could expose the Group to civil and criminal penalties including fines and the imposition of economic sanctions against the Group and reputational damage and withdrawal of banking facilities which could materially impact the Group’s results.
Civil liabilities or judgements against the Company or its directors or officers based on United States federal or state securities laws may not be enforceable in the United States or in England and Wales or in Jersey.	The Company is a public limited company incorporated under the laws of Jersey. Some of the Company’s directors and officers reside outside of the United States. In addition, a substantial portion of the directly owned assets of the Company are located outside of the United States. As a result, it may be difficult or impossible for investors to effect service of process within the United States against the Company or its directors and officers or to enforce against them any of the judgements, including those obtained in original actions or in actions to enforce judgements of the U.S. courts, predicated upon the civil liability provisions of the federal or state securities laws of the United States.

ITEM 4. INFORMATION ON THE COMPANY

The Company provides communications services through a number of established global, multinational and national advertising and marketing services companies that are organised into four business segments. Our largest segment is Advertising and Media Investment Management, which accounted for approximately 47% of the Company’s revenues in 2017. The remaining 53% of our revenues were derived from the business segments

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of Data Investment Management; Public Relations & Public Affairs; and Brand Consulting, Health & Wellness and Specialist Communications (including direct, digital and interactive). Excluding associates, the Company currently employs over 134,000 full-time people in 112 countries.

The Company’s ordinary shares are admitted to the Official List of the UK Listing Authority and trade on the London Stock Exchange and American Depositary Shares (which are evidenced by ADRs or held in book-entry form) representing deposited ordinary shares are listed on the New York Stock Exchange (NYSE). At 24 April 2018 the Company had a market capitalisation of approximately £14.136 billion.

The Company’s executive office is located at 27 Farm Street, London, United Kingdom, W1J 5RJ, Tel:+44 (0)20 7408 2204 and its registered office is located at Queensway House, Hilgrove Street, St Helier, Jersey JE1 IES.

A. History and Development of the Company

WPP plc was incorporated in Jersey on 25 October 2012 under the name WPP 2012 plc.

On 2 January 2013, under a scheme of arrangement between WPP 2012 Limited (formerly known as WPP plc), (Old WPP), the former holding company of the Group, and its share owners pursuant to Article 125 of the Companies (Jersey) Law 1991, and as sanctioned by the Royal Court of Jersey (the Jersey Court), a Jersey incorporated and United Kingdom tax resident company, WPP 2012 plc became the new parent company of the WPP Group and adopted the name WPP plc. Under the scheme of arrangement, all the issued shares in Old WPP were cancelled and the same number of new shares were issued to WPP plc in consideration for the allotment to share owners of one share in WPP plc for each share in Old WPP held on the record date, 31 December 2012. Citibank, N.A., depositary for the ADSs representing Old WPP shares, cancelled Old WPP ADSs held in book-entry uncertificated form in the direct registration system maintained by it and issued ADSs representing shares of WPP plc in book entry uncertificated form in the direct registration system maintained by it to the holders. Holders of certificated ADSs, or ADRs, of Old WPP were entitled to receive ADSs of WPP plc upon surrender of the Old WPP ADSs, or ADRs, to the Depositary. Each Old WPP ADS represented five shares of Old WPP and each WPP plc ADS represents five shares of WPP plc.

Pursuant to Rule 12g-3 under the Securities Exchange Act of 1934, as amended (the Exchange Act), WPP plc succeeded to Old WPP’s registration and periodic reporting obligations under the Exchange Act.

Old WPP was incorporated in Jersey on 12 September 2008 and became the holding company of the WPP Group on 19 November 2008 when the company now known as WPP 2008 Limited, the prior holding company of the WPP Group which was incorporated in England and Wales, completed a reorganisation of its capital and corporate structure. WPP 2008 Limited had become the holding company of the Group on 25 October 2005 when the company now known as WPP 2005 Limited, the original holding company of the WPP Group, completed a reorganisation of its capital and corporate structure. WPP 2005 Limited was incorporated and registered in England and Wales in 1971 and is a private limited company under the Companies Act 1985, and until 1985 operated as a manufacturer and distributor of wire and plastic products. In 1985, new investors acquired a significant interest in WPP and changed the strategic direction of the Company from being a wire and plastic products manufacturer and distributor to being a multinational communications services organisation. Since then, the Company has grown both organically and by the acquisition of companies, most significantly the acquisitions of J. Walter Thompson Group, Inc. (now known as J. Walter Thompson Company LLC) in 1987, The Ogilvy Group, Inc. (now known as The Ogilvy Group LLC) in 1989, Young & Rubicam Inc. (now known as Young & Rubicam LLC) in 2000, Tempus Group plc (Tempus) in 2001, Cordiant Communications Group plc (Cordiant) in 2003, Grey Global Group, LLC (Grey) in 2005, 24/7 Real Media Inc (now known as Xaxis LLC) in 2007, Taylor Nelson Sofres plc (TNS) in 2008, AKQA Holdings, Inc. (AKQA) in 2012, IBOPE Participações Ltda (IBOPE) in 2015, and Triad Digital Media, LLC and the merger of most of the Group’s Australian and New Zealand assets with STW Communications Group Limited in Australia (re-named WPP AUNZ) in 2016.

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The Company spent £228.8 million, £697.1 million and £693.1 million for acquisitions and investments in 2017, 2016 and 2015, respectively, including payments in respect of loan note redemptions and earnout payments resulting from acquisitions in prior years, net of cash and cash equivalents acquired (net) and proceeds on disposal of investments. For the same periods, cash spent on purchases of property, plant and equipment and other intangible assets was £326.2 million, £285.1 million and £246.4 million, respectively, and cash spent on share repurchases and buy-backs was £504.2 million, £427.4 million and £587.6 million, respectively.

B. Business Overview

Introduction

Certain Non-GAAP measures included in this business overview and in the operating and financial review and prospects have been derived from amounts calculated in accordance with IFRS but are not themselves IFRS measures. They should not be viewed in isolation as alternatives to the equivalent IFRS measure, rather they should be read in conjunction with the equivalent IFRS measure. These include constant currency, pro-forma (‘like-for-like’), headline PBIT (Profit Before Interest and Taxation), headline PBT (Profit Before Taxation), headline EBITDA (Earnings before Interest, Taxation, Depreciation and Amortisation), headline operating costs, billings, estimated net new billings, free cash flow and net debt and average net debt, which we define, explain the use of and reconcile to the nearest IFRS measure on pages 24 to 28.

Management believes that these measures are both useful and necessary to present herein because they are used by management for internal performance analyses; the presentation of these measures facilitates comparability with other companies, although management’s measures may not be calculated in the same way as similarly titled measures reported by other companies; and these measures are useful in connection with discussions with the investment community.

The following tables show, for the last three fiscal years, reported revenue and revenue less pass-through costs attributable to each business segment in which the Company operates.

Revenue1	2017				2016				2015
	£m		% of total		£m		% of total		£m		% of total
Advertising and Media Investment Management		7,180.3		47.0		6,547.3		45.5		5,552.8		45.4
Data Investment Management		2,690.9		17.6		2,661.1		18.5		2,425.9		19.8
Public Relations & Public Affairs		1,171.9		7.7		1,101.3		7.7		945.8		7.7
Brand Consulting, Health & Wellness and Specialist Communications		4,222.3		27.7		4,079.2		28.3		3,310.7		27.1
Total		15,265.4		100.0		14,388.9		100.0		12,235.2		100.0

¹  Intersegment sales have not been separately disclosed as they are not material.

Revenue less pass-through costs1	2017				2016				2015
	£m		% of total		£m		% of total		£m		% of total
Advertising and Media Investment Management		5,851.9		44.5		5,413.5		43.6		4,652.0		44.2
Data Investment Management		2,052.3		15.6		1,994.0		16.1		1,768.1		16.8
Public Relations & Public Affairs		1,140.9		8.7		1,078.8		8.7		929.7		8.8
Brand Consulting, Health & Wellness and Specialist Communications		4,094.5		31.2		3,911.5		31.6		3,174.5		30.2

¹  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

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The following tables show, for the last three fiscal years, reported revenue and revenue less pass-through costs attributable to each geographic area in which the Company operates and demonstrates the Company’s regional diversity.

Revenue1	2017				2016				2015
	£m		% of total		£m		% of total		£m		% of total
North America2		5,547.0		36.3		5,280.8		36.7		4,491.2		36.7
United Kingdom		1,985.9		13.0		1,866.3		13.0		1,777.4		14.5
Western Continental Europe		3,160.0		20.7		2,943.2		20.4		2,425.6		19.8
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,572.5		30.0		4,298.6		29.9		3,541.0		29.0
Total		15,265.4		100.0		14,388.9		100.0		12,235.2		100.0

¹  Intersegment sales have not been separately disclosed as they are not material.

²  North America includes the US with revenue of £5,241.3 million (2016: £5,005.8 million, 2015: £4,257.4 million).

Revenue less pass-through costs1	2017				2016				2015
	£m		% of total		£m		% of total		£m		% of total
North America2		4,799.0		36.5		4,603.7		37.1		3,882.3		36.9
United Kingdom		1,683.5		12.8		1,587.6		12.8		1,504.5		14.3
Western Continental Europe		2,616.0		19.9		2,425.5		19.6		2,016.2		19.1
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,041.1		30.8		3,781.0		30.5		3,121.3		29.7

¹  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

²  North America includes the US with revenue less pass-through costs of £4,541.0 million (2016: £4,365.1 million, 2015: £3,674.3 million).

The Company’s principal disciplines and operating companies within each of its business segments are described below.

Advertising and Media Investment Management

Advertising – WPP’s creative advertising services are delivered through our network of agencies, which include many of the industry’s most celebrated names, such as Ogilvy, J. Walter Thompson Worldwide, Y&R and Grey. Among the principal functions of these agencies are the planning and creation of marketing and branding campaigns and the design and production of advertisements across all media.

Media Investment Management – GroupM is the leading global media investment management company, serving as parent to our media agencies including Mindshare, MediaCom, Wavemaker, Essence and m/SIX, and the outcomes-driven programmatic audience company, Xaxis. Responsible for media investment by some of the world’s largest advertisers, GroupM agencies deliver advantage to clients with unrivaled insights into media marketplaces and consumer audiences. GroupM enables its agencies and clients with trading expertise, data, technology and an array of specialist services including addressable TV, content and sports. Our offering in this discipline also includes the network tenthavenue, which integrates some of the Group’s key specialist media offerings in online, mobile, experiential and out of home.

Data Investment Management

Our data investment management services are delivered through Kantar, which is home to some of the world’s leading research, data and insights brands. Individually, these brands – such as Kantar Consulting, Kantar

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Millward Brown, Kantar TNS, Kantar Media and Kantar Worldpanel – are famous and highly respected experts in their fields. Collectively, they offer the most complete view of consumers – the way they live, shop, vote, watch and tweet – in over a hundred countries worldwide. For the benefit of its clients, Kantar connects these specialists and provides access to the wider WPP group of companies and other partners.

Public Relations & Public Affairs

WPP’s public relations and public affairs companies advise clients who are seeking to communicate with a range of stakeholders from consumers to governments and the business and financial communities. They include many of the industry’s leading agencies, such as Burson Cohn & Wolfe, Hill+Knowlton Strategies, Finsbury and Buchanan Communications.

Brand Consulting, Health & Wellness and Specialist Communications

Brand Consulting – Our consumer, corporate and employee brand consulting and design services, covering areas such as brand strategy, creative services, digital corporate communications, identity, motion graphics and packaging, are delivered through leading firms such as Landor, Superunion and FITCH.

Health & Wellness – WPP Health & Wellness serves as parent to healthcare specialist agencies Ogilvy CommonHealth Worldwide, Sudler & Hennessey, ghg | greyhealth group and CMI/Compas.

Specialist Communications (including direct, digital and interactive) – WPP provides the full range of specialist communications services, including digital marketing, production, ecommerce, shopper, direct, field, retail, promotional, point-of-sale, sports marketing and events, through leading companies such as Wunderman, AKQA, Geometry Global, Mirum, VML and Hogarth.

WPP Head Office

WPP, the parent company, with its principal offices in London and New York, develops the strategy of the Group, coordinates the provision of services to cross-Group clients, performs a range of cross-Group functions in areas such as new business, talent recruitment and development, training, IT, finance, audit, legal affairs, M&A, property, sustainability, investor relations and communications, promotes best practice in areas such as our agencies’ approach to diversity and inclusion, drives operating efficiencies and monitors the financial performance of its operating companies.

Our four strategic priorities in 2017

Our reason for being is to help our clients grow their businesses. And by adding value for our clients, we deliver value for our people and share owners. To that end, our strategic priorities in 2017 were:

• Horizontality. Advance the practice of horizontality – ensuring our people work together and harnessing the Group’s collective capabilities for the maximum benefit of clients.

• New markets. Increase the combined geographic share of revenues from the faster-growing markets of Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe to 40-45% of revenues.

• New media. Increase the share of revenues from new media to 40-45% of revenues.

• Technology, data & content. Maintain the share of more measurable advertising and marketing services – such as data investment management and direct, digital and interactive – at 50% of revenues, with a focus on the application of technology, data and content.

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Sustainability

We work with clients on sustainability across our disciplines. This work is growing in importance as more of our clients seek to develop brands with purpose and to integrate social and environmental values into their communication. This can include:

• Data investment management: Providing insight into future trends, changing consumer attitudes to social and environmental issues and testing the impact of sustainability strategy and communications approaches.

• Brand consulting: Integrating social and environmental values into brand and business strategy.

• Consumer and citizen communications: Helping clients communicate credibly with consumers and citizens on sustainability. This can include cause-related marketing that brings together brands with charities and social marketing campaigns for nongovernmental organisations (NGOs) and governments addressing health, safety and environmental issues.

• Internal communications: Engaging internal audiences on social and environmental issues.

• Stakeholder communications: Our public relations and public affairs companies help clients to communicate with regulators, the media, NGOs and the public on sustainability issues.

Clients

• Clients that engaged with us on sustainability were worth £2.11 billion in revenues to the Group in 2017, equivalent to 14% of the total.

People

• We invested £44.9 million on training in 2017 and offered 7,888 paid internships and apprenticeships.

• At year-end 2017, women comprised 25% of the WPP Board, 30% of non-executive directors, 35% of directors and executive leaders in our operating companies, and 54% of total employees.

Environment

• We have cut our carbon footprint per employee to 1.71 tonnes of CO₂e, a 50% reduction from 2006.

Social contribution

• In 2017, our social investment was worth £20.4 million, equivalent to almost 1% of reported profit before tax.

• In addition, WPP media agencies negotiated free media space worth £29.0 million on behalf of pro bono clients, representing over 1% of reported profit before tax.

Clients

The Group works with 369 of the Fortune Global 500, all 30 of the Dow Jones 30, and 71 of the NASDAQ 100. Some 913 clients are served in three disciplines. 629 are served in four disciplines; these clients account for over 53% of Group revenues. The Group also works with 477 clients in six or more countries.

The Company’s 10 largest clients accounted for 14.9% of the Company’s revenues in the year ended 31 December 2017. No client of the Company represented more than 5% of the Company’s aggregate revenues in 2017. The Group’s companies have maintained long-standing relationships with many of their clients, with an average length of relationship for the top 10 clients of approximately 50 years.

Government Regulation

From time to time, governments, government agencies and industry self-regulatory bodies in the United States, European Union and other countries in which the Company operates have adopted statutes, regulations, and

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rulings that directly or indirectly affect the form, content, and scheduling of advertising, public relations and public affairs, and market research, or otherwise limit the scope of the activities of the Company and its clients. Some of the foregoing relate to privacy and data protection and general considerations such as truthfulness, substantiation and interpretation of claims made, comparative advertising, relative responsibilities of clients and advertising, public relations and public affairs firms, and registration of public relations and public affairs firms’ representation of foreign governments.

There has been a trend towards expansion of specific rules, prohibitions, media restrictions, labeling disclosures and warning requirements with respect to advertising for certain products, such as over-the-counter drugs and pharmaceuticals, cigarettes, food and certain alcoholic beverages, and to certain groups, such as children. Though the Company does not expect any existing or proposed regulations to have a material adverse impact on the Company’s business, the Company is unable to estimate the effect on its future operations of the application of existing statutes or regulations or the extent or nature of future regulatory action.

IT

In June 2017, WPP became victim to a sophisticated and destructive cyber attack (commonly referred to as ‘NotPetya’), the scale and impact of which were unprecedented. Subsequently, WPP has prioritized rapid recovery capabilities and sought to strengthen other IT controls. Actions we are taking to manage the cyber and data security risks are set out below.

• The Group assists the operating companies in developing principles on privacy and data protection and compliance with local laws. The Group has implemented extensive training ahead of GDPR implementation in 2018 and is rolling out a GDPR toolkit to assist the operating companies to prepare for implementation. A Chief Privacy Officer has been appointed at the Company and Data Protection Officers are in place at a number of Group companies.

• Our people are required to take Privacy & Data Security Awareness training and understand the WPP Data Code of Conduct and other WPP policies on data privacy and security.

• The WPP Data Health Checker survey is performed annually to understand the scale and breadth of data collected by WPP agencies, so the level of risk associated with this can be assessed.

• The Group is carrying out an IT Transformation project to enhance the Group’s data security. In addition, the Group has established a global internal IT company responsible for providing core IT shared services to all Group companies and manage external technology providers.

C. Organizational Structure

The Company’s business comprises the provision of communications services on a national, multinational and global basis. It operates out of over 3,000 offices in 112 countries (including associates). For a list of the Company’s principal subsidiary undertakings and their country of incorporation see note 29 to the consolidated financial statements.

D. Property, Plant and Equipment

The majority of the Company’s properties are leased, although certain properties which are used mainly for office space are owned. In the United States the sole owned property is the 214,000 square foot Y&R office condominium for their headquarters located at 3 Columbus Circle in New York, New York. The Company also leases an additional 160,700 square feet of space for Y&R at the 3 Columbus Circle location. Other owned properties are in Latin America (principally in Argentina, Brazil, Chile, Mexico, Peru and Puerto Rico), Asia (India and China) and in Europe (Spain, France, UK and Italy). In Europe, owned properties include the 135,626 square foot TNS office located at 2 Rue Francis Pedron, Chambourcy, Paris, France and the 101,592 square foot TNS House at Westgate, Hangar Lane, London. Manufacturing facilities are owned in the United Kingdom.

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Principal leased properties, which are accounted for as operating leases, include office space at the following locations:

Location	Use	Approximate square footage
3 World Trade Center, New York, NY	GroupM, Kantar (Q3 2018 Occupancy)	690,000
636 Eleventh Avenue, New York, NY	Ogilvy, Geometry, WPP Health & Wellness, MJM	564,000
399 Heng Feng Road, Zhabei, Shanghai	Ogilvy, GroupM, Wavemaker, Mediacom, Mindshare, Geometry, Kantar, Hill+Knowlton Strategies, GTB, Sudler MDS, Burson Cohn & Wolfe, Peclars, Hogarth, J Walter Thompson Worldwide.	453,800
498 Seventh Avenue, New York, NY	GroupM, Mindshare, Wavemaker, Mediacom	401,000
Calle de Ríos Rosas, 26, Madrid, Spain	GroupM, Grey, BSB, Kantar, The Health Group, Ogilvy, JWT / RMG Connect, Hill+Knowlton Strategies, Labstore, Burson Cohn & Wolfe, Axicom, WPP, Lambie Nairn, Finance +, Superunion, m/SIX, SCPF Tapsa Y&R, Wunderman (Estimated 2018 Occupancy)	382,402
200 Fifth Avenue and 23 West 23rd Street, New York, NY	Grey, Burson Cohn & Wolfe, ghg, GCI Health	349,000
230 Park Avenue South, New York, NY	Burson Cohn & Wolfe, Landor, Sudler & Hennessey, Hogarth, Kinetic	301,000
500/550 Town Center Drive, Dearborn, MI	Global Team Blue, PRISM, Burrows, Possible, VML	282,900
222 Merchandise Mart / 350 N Orleans, Chicago IL	Ogilvy, J. Walter Thompson, Geometry, Global Team Blue, Kantar Millward Brown, GroupM, Burson Cohn & Wolfe, Kantar TNS, Hill+Knowlton Strategies, The Futures Company, Kinetic, Kantar Media	277,400
Sea Containers House, Upper Ground, London SE1	Ogilvy, Wavemaker	226,000

The Company considers its properties, owned or leased, to be in good condition and generally suitable and adequate for the purposes for which they are used. At 31 December 2017, the fixed asset value (cost less depreciation) representing land, freehold buildings and leasehold buildings as reflected in the Company’s consolidated financial statements was £683.1 million.

In 2017, the Group’s property portfolio decreased by over 1% to 23.8 million square feet, despite the addition of 0.5 million square feet through acquisitions. This reduction reflects the impact of the Group’s continuing strategy of colocating companies, together with the use of ‘agile working’, supported by more technology in the office environment. Establishment costs increased by 6.2%, 1.4% on a constant currency basis (refer to Non-GAAP measures defined in Item 5), which compares with average headcount growth of 1.3%.

We ensure our new buildings focus on sustainability and we look to achieve BREEAM Very Good or LEED Gold. Our operating companies’ workplaces continue to be cited for their creativity, innovation and effectiveness.

2017 saw the completion of our campus buildings in Lisbon, bringing together 600 people from GroupM, Ogilvy, Hill + Knowlton Strategies, Y&R and J. Walter Thompson, as well as Hamburg with 850 people from Scholz & Friends, Y&R, Kantar, MediaCom, Wavemaker and Burson Cohn & Wolfe. These colocation projects meet our new planning standards and support our goal of horizontality.

Projects expected to be completed in 2018 include colocations at 3 World Trade Center in New York with approximately 4,000 people, Madrid with 2,500 people, Amsterdam with 1,500 people, and Kuala Lumpur with 1,100 people. Longer-term colocation projects are currently committed in London, Chicago, Toronto and Buenos Aires; and in planning for Paris, Prague, Warsaw, Dusseldorf, Bucharest, Mumbai, Gurgaon and Hong Kong.

Our goal is to continue to deliver excellent workspace, while reducing the portfolio further and so mitigate the impact of property inflation.

See note 3 to the consolidated financial statements for a schedule by years of future minimum rental payments to be made and future sublease rental payments to be received, as at 31 December 2017, under non-cancelable operating leases of the Company.

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ITEM 4A. UNRESOLVED STAFF COMMENTS

Not applicable.

ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS

As introduced on page 7, certain Non-GAAP measures are included in the operating and financial review and prospects.

A. Operating Results

Overview

The Company is one of the world’s most comprehensive marketing communications groups. It operates through a large number of established national, multinational and global advertising and marketing services companies. The Company offers services in four reportable segments:

• Advertising and Media Investment Management;

• Data Investment Management;

• Public Relations & Public Affairs; and

• Brand Consulting, Health & Wellness and Specialist Communications

In 2017, approximately 47% of the Company’s consolidated revenues were derived from Advertising and Media Investment Management, with the remaining 53% of its revenues being derived from the remaining three segments.

The following discussion is based on the Company’s audited consolidated financial statements beginning on page F-1 of this report. The Group’s consolidated financial statements have been prepared in accordance with IFRS as issued by the IASB.

At WPP’s Preliminary Results announcement on 1 March 2018, following a disappointing year in terms of financial performance, the executive team outlined an acceleration of the Company’s strategy. Like-for-like growth was flat in 2017, and headline PBIT was up marginally – reflecting pressure on marketing budgets and the impact of structural changes in the market, especially technological disruption.

The accelerated strategy focused on the following areas:

• First, strengthening client coordination across the Group. This includes handing greater responsibility and authority to the leaders of our 51 Global Client Teams, who account for a third of our revenue and oversee client relationships across WPP.

• Second, boosting the roles of our Country and Regional Managers, to ensure our offer is fully integrated at a national and regional level. Recent Country and Regional Manager appointments include Karen Blackett OBE in the UK, Mathieu Morgenzstern in France and Sergio Amado in Brazil.

• Third, developing key capabilities into cross-Group offers, covering digital transformation, digital marketing, digital production and shopper marketing. We recently announced, for example, that Hogarth, the world’s leading production services company, which is now wholly owned by WPP, will become our global production management platform. This is an area in which, by consolidating all our production capabilities under one banner, we can offer significant benefits to our clients and our own companies.

• Fourth, introducing further sharing of functions, systems and platforms across the Group, spanning IT, talent, finance, procurement and property to deliver greater efficiency for WPP and clients.

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• And, finally, revising senior executives’ incentives across our companies to align them more closely with Group performance.

Following the departure of Sir Martin Sorrell from the Company, the Board has appointed Mark Read and Andrew Scott as joint Chief Operating Officers – reporting to and supported by Roberto Quarta, who assumes the role of Executive Chairman until the appointment of a new Group Chief Executive.

In addition to running the business on a day-to-day basis, Mark and Andrew, together with Group Finance Director Paul Richardson, are empowered by the Board to take forward the Company’s strategy, with a mandate to act decisively and to bring their own perspective to the task. WPP will get even closer to our clients to better understand and meet their needs and to help them grow in a world of disruption; we will get closer to technology partners like Adobe, Facebook, Google, Microsoft and others; we will ensure our structure and offer make it as simple as possible for clients to access our services across the Group; and we will put data, technology and creativity at the heart of what we do.

We will make details of the plan public as appropriate during the course of the year. Although the Company has faced challenges in recent months, we begin this new phase from a position of market leadership and with total confidence in the enduring value of what we offer to clients. WPP remains well positioned to capitalise on the opportunities ahead, to the benefit of all our stakeholders.

To enhance share owner value, we aim to maximise the return on investment on the Company’s substantial free cash flow. As capital expenditure remains relatively stable, our focus is on the alternative uses of funds between acquisitions, share buy-backs and dividends. We have increasingly come to the view that, currently, the markets favour consistent increases in dividends and higher sustainable pay-out ratios, along with anti-dilutive progressive buy-backs and, of course, sensibly-priced small-to-medium sized strategic acquisitions.

The share price decreased by 26% in 2017, closing at 1,341.0p at year end. Since then it has fallen to 1,116.5p, down 16.7%, at 24 April 2018. Dividends increased by almost 6% to 60.00p, a new high.

Revenue was up over 6% to £15.3 billion and up well over 1% in constant currencies compared with last year, the difference to the reportable number reflecting the weakness of the pound sterling against most currencies particularly in the first half of the year. Billings were £55.6 billion, up 0.6% and down almost 4% in constant currencies.

Group revenue is more weighted to the second half of the year across all regions and sectors, and, particularly, in the faster-growing markets of Asia Pacific and Latin America. As a result, the Group’s headline PBIT continues to be skewed to the second half of the year, with the Group earning approximately one-third of its headline PBIT in the first half and two-thirds in the second half.

Reported profit before interest and tax was down over 4% to £2.022 billion from £2.113 billion, down over 7% in constant currencies. Headline PBIT was up almost 5% to £2.267 billion and up well over 1% in constant currencies, reflecting currency tailwinds in the full year.

Profit for the year increased by over 27% to £1.912 billion and almost 23% in constant currencies. Headline EBITDA increased by almost 5% to £2.534 billion, up over 1% in constant currencies. Profit before tax was up almost 12% to £2.109 billion and headline profit before tax was up over 5% to £2.093 billion. Diluted earnings per share were up almost 32% to 142.4p.

Net cash inflow from operating activities decreased to £1.4 billion in the year. Free cash flow amounted to well over £1.5 billion in 2017. This free cash flow was absorbed by £0.2 billion of net cash acquisition payments and investments, £0.5 billion of share buy-backs and £0.8 billion of dividends, a total outflow of £1.5 billion. This resulted in a net cash inflow of £55 million, before any changes in working capital. Debt financing was £6.9 billion at 31 December 2017, compared to £6.6 billion at 31 December 2016. Average net debt was £5.1 billion in 2017, compared to £4.6 billion in 2016, at 2017 exchange rates, and net debt at 31 December 2017

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was £4.5 billion, against £4.1 billion at 31 December 2016, primarily reflecting the movement in working capital and provisions of £532 million.

Estimated net new business billings of $6.3 billion were generated in the year.

Segment performance

Performance of the Group’s businesses is reviewed by management based on headline PBIT. A table showing these amounts by operating sector and geographical area for each of the three years ended 31 December 2017, 2016 and 2015 is presented in note 2 to the consolidated financial statements. To supplement the reportable currency segment information presented in note 2 to the consolidated financial statements, the following tables give details of revenue growth and revenue less pass-through costs growth by geographical area and operating sector on a reported, constant currency, and like-for-like basis.

Geographical area

Revenue Analysis
	Reported revenue growth%+/(-)				Constant currency revenue growth %+/(-)				Like-for-like revenue growth %+/(-)
	2017		2016		2017		2016		2017			2016
North America		5.0		17.6		0.3		3.9		(2.3	)		2.0
United Kingdom		6.4		5.0		6.4		5.0		4.9			1.8
Western Continental Europe		7.4		21.3		1.6		8.0		(0.3	)		4.8
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		6.4		21.4		1.1		11.9		—			3.5
Total Group		6.1		17.6		1.6		7.2		(0.3	)		3.0

Revenue less pass-through costs analysis
	Reported revenue less pass- through costs1 growth %+/(-)				Constant currency revenue less pass- through costs1 growth %+/(-)					Like-for-like revenue less pass- through costs1 growth %+/(-)
	2017		2016		2017			2016		2017			2016
North America		4.2		18.6		(0.4	)		4.8		(3.2	)		2.8
United Kingdom		6.0		5.5		6.0			5.5		4.8			2.1
Western Continental Europe		7.9		20.3		1.9			7.2		—			3.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		6.9		21.1		1.6			11.8		(0.8	)		3.5

¹  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

North America constant currency revenue was up over 4% in the final quarter and like-for-like up well over 1%, the strongest quarter of the year, reflecting strong growth in Media Investment Management, Brand Consulting and parts of the Group’s direct, digital and interactive operations, including ecommerce and shopper marketing. On a full-year basis, constant currency revenue was up 0.3%, with like-for-like down just over 2%. Constant currency revenue less pass-through costs showed a similar pattern.

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UK constant currency revenue was up over 11% in the final quarter and like-for-like up well over 8%, the strongest quarter of the year. Media Investment Management, direct, digital and interactive and Public Relations & Public Affairs were particularly strong with Data Investment Management, Health & Wellness and the Group’s Specialist Communications businesses also up. On a full-year basis, constant currency revenue was up strongly at well over 6%, with like-for-like up almost 5%, with the second half significantly stronger than the first half, driven by new business wins in the Group’s direct, digital and interactive businesses. Full-year revenue less pass-through costs was up 6% in constant currency, with like-for-like up almost 5%.

Western Continental Europe constant currency revenue was up well over 1% in the final quarter, partly the result of acquisitions, with like-for-like revenue down over 1%, reflecting volatility in political and macro-economic conditions. Revenue less pass-through costs followed a similar pattern, up almost 2% in constant currency, but down 0.8% like-for-like. For the year, Western Continental Europe constant currency revenue grew well over 1% with like-for-like down 0.3%. Revenue less pass-through costs growth was slightly stronger, up almost 2% in constant currency and flat like-for-like. Austria, Belgium, Denmark, Finland, Netherlands and Turkey showed growth in the final quarter, but Germany, Greece, Ireland, Italy and Switzerland were tougher.

In Asia Pacific, Latin America, Africa & the Middle East and Central & Eastern Europe, on a constant currency basis, revenue was down 1% in the fourth quarter and down 0.1% like-for-like, largely as a result of stronger comparatives in the fourth quarter of 2016, when constant currency revenue was up almost 12% and like-for-like revenue up almost 4%, the strongest quarter of the year. In the fourth quarter, Latin America, despite almost 4% growth, was weaker than the first nine months with Central & Eastern Europe also tougher. Constant currency revenue less pass-through costs growth in the region was similar to revenue growth, with like-for-like revenue less pass-through costs growth for the region as a whole down 0.8%.

In 2017, 30% of the Group’s revenue came from Asia Pacific, Latin America, Africa & the Middle East and Central & Eastern Europe, up marginally from 2016. With revenue less pass-through costs, the increase was slightly more, up to almost 31% in 2017.

Operating Sector

Revenue Analysis
	Reported revenue growth%+/(-)				Constant currency revenue growth %+/(-)					Like-for-like revenue growth %+/(-)
	2017		2016		2017			2016		2017			2016
Advertising and Media Investment Management		9.7		17.9		5.1			7.7		(0.1	)		4.7
Data Investment Management		1.1		9.7		(3.6	)		0.4		(2.9	)		(0.9	)
Public Relations & Public Affairs		6.4		16.4		1.7			5.0		0.7			2.5
Brand Consulting, Health & Wellness and Specialist Communications		3.5		23.2		(0.9	)		11.8		0.8			3.0
Total Group		6.1		17.6		1.6			7.2		(0.3	)		3.0

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Revenue less pass-through costs analysis
	Reported revenue less pass- through  costs1 growth %+/(-)				Constant currency revenue less pass- through costs1 growth %+/(-)					Like-for-like revenue less pass- through costs1 growth %+/(-)
	2017		2016		2017			2016		2017			2016
Advertising and Media Investment Management		8.1		16.4		3.6			6.5		(2.3	)		3.7
Data Investment Management		2.9		12.8		(1.9	)		3.2		(1.3	)		0.9
Public Relations & Public Affairs		5.8		16.0		1.0			4.7		0.2			2.4
Brand Consulting, Health & Wellness and Specialist Communications		4.7		23.2		0.3			11.8		1.0			3.5

¹  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

Advertising and Media Investment Management was the strongest performing sector overall, with constant currency revenue up over 5% in 2017, up well over 5% in quarter four. On a like-for-like basis, revenue was up almost 2% in quarter four but down 0.1% for the year. Media Investment Management showed strong like-for-like revenue growth in all regions except Western Continental Europe and the Middle East in quarter four, with particularly strong growth in North America, the UK, Asia Pacific and Latin America. The Group’s Advertising businesses remained difficult, particularly in North America.

The strong revenue and revenue less pass-through costs growth across most of the Group’s Media Investment Management businesses, offset by slower growth in the Group’s Advertising businesses in most regions, resulted in the combined revenue less pass-through costs margin of this sector flat with last year at 19.0%, up 0.2 margin points in constant currency.

In 2017, J. Walter Thompson, Ogilvy, Y&R and Grey generated net new business billings of $1.4 billion. In the same year, GroupM, the Group’s Media Investment Management company, which includes Mindshare, Wavemaker (the new agency formed by the merger of MEC and Maxus), MediaCom, Essence, Xaxis and [m]PLATFORM, together with tenthavenue, generated net new business billings of $3.4 billion. The Group totalled $6.3 billion in net new business billings (2016: $6.8 billion).

On a like-for-like basis, Data Investment Management revenue was down almost 1% in the fourth quarter, a significant improvement over the first nine months, with growth in the UK, Latin America and Africa. On a full-year basis, constant currency revenue was down well over 3%, down almost 3% like-for-like, with revenue less pass-through costs, down almost 2% in constant currency and down over 1% like-for-like. Geographically, revenue less pass-through costs was up strongly in the UK and Latin America, with North America and Asia Pacific particularly difficult. Kantar Worldpanel and Lightspeed showed strong like-for-like revenue less pass-through costs growth, with Kantar Insights, Kantar Health and Kantar Public less robust. Revenue less pass-through costs margins were down 0.5 margin points (the same as the first half) to 17.1% and down 0.4 margin points in constant currency.

In constant currencies, the Group’s Public Relations & Public Affairs businesses were weaker in the second half of the year with constant currency revenue down almost 1% in the third and fourth quarter. The UK and the Middle East grew strongly in the fourth quarter offset by weaker conditions in North America and Continental Europe. Full-year revenue grew almost 2% in constant currency and 0.7% like-for-like. Cohn & Wolfe and the Group’s specialist Public Relations & Public Affairs businesses Glover Park Group, Ogilvy Government Relations and Buchanan performed particularly well. Overall revenue less pass-through costs margins fell 0.6 margin points to 16.1% and by 0.4 margin points in constant currency, as parts of the Group’s North American businesses slowed in the second half.

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Brand Consulting, Health & Wellness and Specialist Communications (including direct, digital and interactive) was the strongest performing sector in the fourth quarter on a like-for-like basis, up 2%, driven by solid growth in Brand Consulting and Specialist Communications. The Group’s direct, digital and interactive businesses, especially VML, Wunderman and Hogarth performed well. Revenue less pass-through costs margins, for the sector as a whole, were down slightly by 0.1 margin points to 15.3% and flat in constant currency, with revenue less pass-through costs margins negatively affected as parts of the Group’s direct, digital and interactive, Brand Consulting and Health & Wellness businesses in North America slowed.

In 2017, 41.7% of the Group’s revenue came from direct, digital and interactive, up 2.8 percentage points from the previous year, with like-for-like revenue growth of well over 2% in 2017.

Presentation

The Group has changed its accounting policy in regard to the presentation of the income statement under IAS 1 Presentation of Financial Statements for the year ended 31 December 2017, moving from a ‘nature of expense’ method of presentation to a ‘function of expense’ method of presentation. The Group considers this to be a more reliable and relevant presentation and prior years have been re-presented in accordance with IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. This change in accounting policy has not resulted in a change to revenue, operating profit or profit for any of the years presented.

2017 compared with 2016

Revenues

Our reported revenue growth for the year was 6.1%, and on a constant currency basis, which excludes the impact of currency movements, revenue was up 1.6%. This difference of 4.5% reflects the weakness of the pound sterling against most currencies, particularly in the first half of the year, with some strengthening in the second half.

On a like-for-like basis, which excludes the impact of currency and acquisitions, revenue was down 0.3%. In the fourth quarter, like-for-like revenue was up 1.2%, the strongest quarter of the year.

Costs of services, general and administrative costs

Costs of services increased by 6.5% in 2017 to £12,090.2 million from £11,348.1 million in 2016. The increase is in line with the increase in revenue, primarily driven by pass-through costs and staff costs.

General and administrative costs increased by 29.6% to £1,267.0 million from £977.7 million in 2016, primarily due to a net exceptional loss of £24 million in 2017 (compared to a net exceptional gain of £164 million in 2016). The remaining increase is driven by increases in various costs, such as staff costs, currency exchange (gains)/losses and impairment and amortisation of acquired intangibles.

Headline operating costs rose by 6.6%, rose by 1.8% in constant currency, but down 0.6% like-for-like. Reported staff costs increased by 6.9%. Reported staff costs, excluding incentives, increased by 7.8%, up 2.8% in constant currency. Incentive payments of £324 million were 13.1% of headline PBIT, excluding share of results of associates (excluding exceptional gains/losses), before incentives compared with £367 million or 14.9% in 2016. Achievement of target, at an individual Company level, generally generates 15% of headline PBIT, excluding share of results of associates (excluding exceptional gains/losses), before bonus as an incentive pool, 20% at maximum and 25% at super maximum.

On a like-for-like basis, the average number of people in the Group, excluding associates, in 2017 was 134,428 compared to 136,409 in 2016, a decrease of 1.5%. On the same basis, the total number of people in the Group, excluding associates, at 31 December 2017 was 134,413 compared to 136,775 at 31 December 2016, a decrease of 2,362 or 1.7%.

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The Group has embarked on a number of programs to improve operational effectiveness including process simplification, shared service centres, offshoring certain tasks to lower-cost markets and, where appropriate, outsourcing. We are consolidating IT infrastructure and services, and centralising systems development and applications to create efficiencies and focus investment.

In 2017 the Group generated exceptional gains of £129 million, largely representing the gain on the sale of the Group’s minority interests in Asatsu-DK to Bain Capital and Infoscout to Vista Equity Partners. These were partly offset by investment write-downs of £96 million, principally in relation to comScore Inc., resulting in a net gain of £33 million, which in accordance with prior practice, has been excluded from headline PBIT. The Group took a £57 million restructuring provision, primarily against severance provisions in mature markets and the Group’s IT Transformation costs, resulting in a net exceptional loss of £24 million.

Profit before interest and taxation

As a result of the above, reported profit before interest and tax was down over 4% to £2.022 billion from £2.113 billion, down over 7% in constant currencies. Headline PBIT for 2017 was up 4.9% to £2.267 billion, from £2.160 billion and up 1.5% in constant currencies.

Finance income, finance costs and revaluation of financial instruments

Finance income increased to £95.2 million in 2017 from £80.4 million in 2016. Finance costs increased to £269.8 million in 2017 from £254.5 million in 2016. Therefore, net finance costs were up marginally by 0.3% at £174.6 million, compared with £174.1 million in 2016, an increase of £0.5 million. This is due to the weakness in sterling resulting in higher translation costs on non-sterling debt and the cost of higher average net debt being offset by the beneficial impact of lower bond coupon costs resulting from refinancing maturing debt at cheaper rates and higher investment income. Revaluation of financial instruments resulted in a gain of £262.2 million in 2017 and a loss of £48.3 million in 2016.

Taxation

The Group’s tax rate on reported profit before tax was 9.3% in 2017 against 20.6% in 2016, principally due to the exceptional tax credit, primarily relating to the re-measurement of deferred tax liabilities. Given the Group’s geographic mix of profits and the changing international tax environment, the tax rate is expected to increase slightly over the next few years. The recent tax changes outlined in the United States Tax Cuts and Jobs Act do not impact the Group’s tax rate significantly, up or down, except for the tax credit mentioned above.

Profit for the year

Profit for the year increased by over 27% to £1,912.3 million from £1,501.6 million in 2016 on a reported basis and increased by almost 23% in constant currencies. In 2017, £1,816.6 million of profit for the year was attributable to equity holders of the parent and £95.7 million attributable to non-controlling interests. Diluted earnings per share was up almost 32% to 142.4p from 108.0p and increased 26.9% in constant currencies.

2016 compared with 2015

Revenues

Reported revenue growth for the year was 17.6%, and on a constant currency basis, which excludes the impact of currency movements, revenue was up 7.2%. This difference of 10.4% reflects the weakness of the pound sterling against most currencies, particularly in the second half, following the UK vote to exit the European Union.

On a like-for-like basis, which excludes the impact of currency and acquisitions, revenue was up 3.0%. In the fourth quarter, like-for-like revenue was up 0.5%, the weakest quarter of the year, following like-for-like growth

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of well over 6% in the final quarter of 2015, which was that year’s strongest quarter. North America and the UK slowed in the fourth quarter, again partly the result of stronger comparatives, with Western Continental Europe and Asia Pacific, Latin America, Africa & the Middle East and Central & Eastern Europe continuing to perform well.

Costs of services, general and administrative costs

Costs of services increased by 16.9% in 2016 to £11,348.1 million from £9,709.1 million in 2015. The increase is in line with the increase in revenue, primarily driven by pass-through costs and staff costs.

General and administrative costs increased by 9.4% to £977.7 million from £894.1 million in 2015, primarily due to increases in staff costs, amortization and impairment of acquired intangibles and impairment of goodwill, partially offset by a net exceptional gain of £164 million in 2016 (compared to a net exceptional gain of £82 million in 2015).

Headline operating costs rose by 16.8%, rose by 7.0% in constant currency and by 2.7% like-for-like. On all bases, the growth in costs was lower than the growth in revenue.

On a like-for-like basis, the average number of people in the Group, excluding associates, in 2016 was 132,657 compared to 132,315 in 2015, an increase of 0.3%. On the same basis, the total number of people in the Group, excluding associates, at 31 December 2016 was 134,341 compared to 134,479 at 31 December 2015, a decrease of 138 or 0.1%. This reflected the transfer of a further 250 staff to IBM in the first half of 2016, as part of the strategic partnership agreement and IT transformation program, together with the continuing sound management of headcount and staff costs in 2016 to balance revenue and costs. On the same basis, revenue increased 3.0%.

Reported staff costs increased by 17.0%. Reported staff costs, excluding incentives, increased by 17.3%, up 7.5% in constant currency. Incentive payments amounted to £367 million ($486 million), which were 14.9% of headline PBIT, excluding share of results of associates (excluding exceptional gains/losses), before incentives compared with £331 million ($505 million) or 16.2% in 2015. Achievement of target, at an individual company level, generally generates 15% of headline PBIT, excluding share of results of associates (excluding exceptional gains/losses), before bonus as an incentive pool, 20% at maximum and 25% at super maximum.

In 2016, the Group generated exceptional gains of £277 million, largely representing re-measurement gains in relation to the Group’s interest in Imagina and gains on the sale of the Group’s interest in Grass Roots. These were partly offset by investment write-downs of £86 million, resulting in a net gain of £191 million, which in accordance with prior practice, has been excluded from headline PBIT. The Group took a £27 million restructuring provision, primarily IT Transformation costs, resulting in a net exceptional gain of £164 million.

Profit before interest and taxation

As a result of all this, profit before interest and taxation was up over 25% to £2.113 billion and 12% in constant currencies. Headline PBIT was up almost 22% to £2.160 billion, over £2 billion for the first time, from £1.774 billion and up well over 8% in constant currencies.

Finance income, finance costs and revaluation of financial instruments

Finance income increased to £80.4 million in 2016 from £72.4 million in 2015. Finance costs increased to £254.5 million in 2016 from £224.1 million in 2015. Therefore, net finance costs were up 14.8% at £174.1 million, compared with £151.7 million in 2015, an increase of £22.4 million. This is due to the weakness in sterling resulting in higher translation costs on non-sterling debt, the cost of higher average net debt and lower income from investments, all partially offset by the beneficial impact of lower bond coupon costs resulting from refinancing maturing debt at cheaper rates. Revaluation of financial instruments resulted in a loss of £48.3 million in 2016 and a loss of £34.7 million in 2015.

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Taxation

The Group’s tax rate on reported profit before tax was 20.6% in 2016 against 16.6% in 2015. The difference in the reported tax rate is due to the varying tax charges in the countries we operate, including the impact of a significant reduction in non-taxable gains on disposals of investments and subsidiaries and gains on remeasurement of equity interests recognised in the year. The tax charge includes the release of provisions following the successful resolution of a number of tax matters during the year. Given the Group’s geographic mix of profits and the changing international tax environment, the tax rate is expected to increase slightly over the next few years.

Profit for the year

Profit for the year increased by 20.6% to £1,501.6 million in 2016 from £1,245.1 million in 2015 on a reported basis and increased by 7.2% in constant currency. In 2016, £1,400.1 million of profit for the year was attributable to equity holders of the parent and £101.5 million attributable to non-controlling interests. Diluted earnings per share increased over 22% to 108.0p from 88.4p and increased well over 8% in constant currencies.

B. Liquidity and Capital Resources

General—The primary sources of funds for the Group are cash generated from operations and funds available under its credit facilities. The primary uses of cash funds in recent years have been for debt service and repayment, capital expenditures, acquisitions, share repurchases and cancellations and dividends. For a breakdown of the Company’s sources and uses of cash and for the Company’s liquidity risk management see the “Consolidated Cash Flow Statement” and note 24, which are included as part of the Company’s consolidated financial statements in Item 18 of this Report.

Mergers and acquisitions: Our acquisition focus continues to be on the triple play of faster-growing geographic markets, new media and data investment management, including the application of technology, data and content, consistent with our strategic priorities (see page 9). In 2017, the Group spent over £200 million on acquisition payments, net of cash acquired and disposal proceeds, completing 43 transactions in the year; 15 acquisitions and investments were in new markets, 32 in quantitative and digital and five were driven by individual client or agency needs. Out of all these transactions, nine were in both new markets and quantitative and digital.

Specifically, in 2017, acquisitions and increased equity stakes have been completed in Advertising and Media Investment Management in the US, Germany, the Middle East and North Africa, Croatia, Russia, China and India; Data Investment Management in the UK and Ireland; Brand Consulting in the UK and Italy; direct, digital and interactive in the US, the UK, France, Ireland, Spain, the United Arab Emirates, Kenya, China and Brazil.

We will continue to assess opportunities in line with our strategy to increase the Group’s exposure to:

• Faster-growing geographic markets and sectors;

• New media and data investment management, including the application of technology and big data.

Dividends: Given the Company’s performance in 2017, the Board proposes a marginal increase in the final dividend to 37.3p per share, which, together with the interim dividend of 22.7p per share, makes a total of 60.0p per share for 2017, an overall increase of 6.0%. This represents a dividend pay-out ratio of 50%, the same as last year. The record date for the final dividend is 15 June 2018, payable on 9 July 2018. Dividends paid in respect of 2017 will total approximately £760 million for the year.

Share buy-backs: They continue to be targeted to absorb any share dilution from issues of options or restricted stock in the range of 2-3% of the issued share capital. In addition, the Company does also have considerable free

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cash flow to take advantage of any anomalies in market values. Share buy-backs in 2017 cost £504 million, representing 2.5% of issued share capital. Funds returned to share owners in 2017 totalled over £1.2 billion, including share buy-backs, an increase of 20% over 2016. In 2016, funds returned to share owners were over £1.0 billion. In the last five years, £5.0 billion has been returned to share owners and over the last 10 years £6.6 billion.

The Group’s liquidity is affected primarily by the working capital flows associated with its media buying activities on behalf of clients. The working capital movements relate primarily to the Group’s billings. Billings comprise the gross amounts billed to clients in respect of commission-based/fee-based income together with the total of other fees earned. In 2017, billings were £55.6 billion, or 3.6 times the revenue of the Group. The inflows and outflows associated with media buying activity therefore represent significant cash flow within each month of the year and are forecast and re-forecast on a regular basis throughout the year by the Group’s treasury staff so as to ensure that there is continuing coverage of peak requirements through committed borrowing facilities from the Group’s bankers and other sources.

Liquidity risk management—The Group manages liquidity risk by ensuring continuity and flexibility of funding even in difficult market conditions. Undrawn committed borrowing facilities are maintained in excess of peak net borrowing levels and debt maturities are closely monitored. Targets for debt less cash position are set on an annual basis and, to assist in meeting this, working capital targets are set for all the Group’s major operations. See additional discussion on liquidity risk in note 24 to the consolidated financial statements.

Debt

The Company’s borrowings consist of bonds and revolving credit facilities, details on the Company’s borrowings are provided in note 10 to the consolidated financial statements.

The Group has a five-year Revolving Credit Facility of $2.5 billion due July 2021. Borrowings under the Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of the Group, including requirements that (i) the interest coverage ratio for each financial period equal or exceed 5.0 to 1 and (ii) the ratio of borrowed funds to earnings before interest, taxes, depreciation and amortisation at 30 June and 31 December in each year shall not exceed 3.5 to 1, both covenants are defined in the relevant agreement. The Group is in compliance with both covenants.

The Group also has a three-year Revolving Credit Facility of A$520 million due April 2019. Borrowings under the Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of WPP AUNZ, including requirements that (i) the interest coverage ratio for each financial period equal or exceed 4.0 to 1 and (ii) the ratio of borrowed funds to earnings before interest, taxes, depreciation and amortisation at 30 June and 31 December in each year shall not exceed 3.0 to 1, both covenants are defined in the relevant agreement. The Group is in compliance with both covenants.

Hedging of financial instruments—The Group’s policy on interest rate and foreign exchange rate management sets out the instruments and methods available to hedge interest and currency risk exposures and the control procedures in place to ensure effectiveness. The Group uses derivative financial instruments to reduce exposure to foreign exchange risk and interest rate movements. The Group does not hold or issue derivative financial instruments for speculative purposes.

In 2017, net cash inflow from operating activities was £1,408.1 million. Free cash flow available for debt repayment, acquisitions, share buy-backs and dividends was £1,540.3 million. This free cash flow was absorbed by £228.8 million in net acquisitions and disposals, by £504.2 million in share repurchases and buy-backs and by £751.5 million in dividends, resulting in a net inflow of £55.8 million.

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Net debt at 31 December 2017 was £4.5 billion, against £4.1 billion at 31 December 2016, primarily reflecting the movement in working capital and provisions of £532 million, and average net debt was £5.1 billion in 2017, compared to £4.6 billion in 2016, at 2017 exchange rates. The average net debt to headline EBITDA ratio in 2017 is 2.0 times, which is at the top-end of the Group’s target range of 1.5-2.0 times.

Interest (finance cost net of finance income, excluding revaluation of financial instruments) cover based on headline PBIT in 2017 was 13.0 times. Average net debt in the first quarter of 2018 was £4.766 billion, compared to £4.409 billion in 2017, at 2018 exchange rates.

With an equity market capitalisation of approximately £14.1 billion at 24 April 2018, the total enterprise value of the Company is approximately £19.5 billion, a multiple of 7.7 times 2017 headline EBITDA.

Given the strong cash generation of the business, its debt maturity profile and available facilities, the directors believe the Company has sufficient liquidity to match its requirements for the foreseeable future.

Refer to Item 5F for details on the Company’s material commitments for capital expenditures at 31 December 2017.

C. Research and Development, Patents and Licenses, etc.

Not applicable.

D. Trend Information

The discussion below and in the rest of this Item 5 includes forward-looking statements regarding plans, objectives, projections and anticipated future performance based on assumptions that are subject to risks and uncertainties. As such, actual results or outcomes may differ materially from those discussed in the forward-looking statements. See “Forward-Looking Statements” preceding Item 1 in this annual report.

In the first quarter of 2018, reported revenue was down 4.0% at £3.555 billion, with currency headwinds of 6.0% resulting in constant currency revenue up 2.0%, like-for-like revenue up 0.8%. Our quarter one preliminary revised forecasts are in line with budget, with a slightly stronger second half, at the revenue level and show flat like-for-like revenue. The Group won $1.737 billion in net new business in the first quarter.

E. Off-Balance Sheet Arrangements

None.

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F. Tabular Disclosure of Contractual Obligations

The following summarises the Company’s estimated contractual obligations at 31 December 2017, and the effect such obligations are expected to have on its liquidity and cash flows in the future periods. Certain obligations presented below held by one subsidiary of the Company may be guaranteed by another subsidiary in the ordinary course of business.

			Payments due in
(£m)	Total		2018			2019		2020		2021		2022		Beyond 2022
Debt financing under the Revolving Credit Facility and in relation to unsecured loan notes1
Eurobonds		2,846.2		224.0			533.3		222.2		—		—		1,866.7
Sterling bonds		600.0		—			—		200.0		—		—		400.0
US$ bonds		2,116.5		—			—		—		600.7		369.7		1,146.1
Bank revolvers		985.2		—			195.8		—		789.4		—		—
Subtotal		6,547.9		224.0			729.1		422.2		1,390.1		369.7		3,412.8
Interest payable		1,869.2		167.7			167.2		162.1		147.7		118.2		1,106.3
Total		8,417.1		391.7			896.3		584.3		1,537.8		487.9		4,519.1
Operating leases2		3,857.5		530.0			462.5		408.7		346.7		296.2		1,813.4
Capital commitments3		137.2		137.0			0.2		—		—		—		—
Investment commitments3		54.2		54.2			—		—		—		—		—
Financial derivatives		4.9		(4.0	)		1.1		2.6		2.8		2.4		—
Estimated obligations under acquisition earnouts and put option agreements		888.8		219.3			149.2		180.9		116.9		117.6		104.9
Total contractual obligations		13,359.7		1,328.2			1,509.3		1,176.5		2,004.2		904.1		6,437.4

¹  In addition to debt financing under the Revolving Credit Facility and in relation to unsecured loan notes, the Company had short-term overdrafts at 31 December 2017 of £393.2 million. The Group’s net debt at 31 December 2017 was £4,483.1 million and is analysed in Item 5B.

²  Operating leases are net of sub-let rentals of £36.4 million.

³  Capital and investment commitments include commitments contracted, but not provided for in respect of property, plant and equipment and in respect of interests in associates and other investments, respectively.

The Company expects to make annual contributions to its funded defined benefit plans, as determined in line with local conditions and practices. Contributions in respect of unfunded plans are paid as they fall due. The total contributions (for funded plans) and benefit payments (for unfunded plans) paid for 2017 amounted to £68.2 million (2016: £43.7 million, 2015: £70.9 million). Employer contributions and benefit payments in 2018 are expected to be approximately £70 million. Projections for years after 2018 are subject to a number of factors, including future asset performance and changes in assumptions which mean the Company is unable to make sufficiently reliable estimations of future contributions.

Non-GAAP Information

As introduced on page 7, the following metrics are the Group’s Non-GAAP measures.

Constant currency

The Company’s reporting currency is the UK pound sterling. However, the Company’s significant international operations give rise to fluctuations in foreign exchange rates. To neutralize foreign exchange impact and illustrate the underlying change in revenue, profit and other relevant financial statement line items from one year to the next, the Company has adopted the practice of discussing results in both reportable currency (local currency results translated into pounds sterling at the prevailing foreign exchange rate) and constant currency.

The Group uses US dollar-based, constant currency models to measure performance. These are calculated by applying budgeted 2017 exchange rates to local currency reported results for the current and prior year. This gives a US dollar-denominated income statement which excludes any variances attributable to foreign exchange rate movements.

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Pro-forma (‘like-for-like’)

Management believes that discussing like-for-like contributes to the understanding of the Company’s performance and trends because it allows for meaningful comparisons of current period to that of prior periods.

Pro-forma comparisons are calculated as follows: current year, constant currency actual results (which include acquisitions from the relevant date of completion) are compared with prior year, constant currency actual results, adjusted to include the results of acquisitions for the commensurate period in the prior year. The Group uses the terms ‘pro-forma’ and ‘like-for-like’ interchangeably.

The following table reconciles reported revenue growth for 2017 and 2016 to like-for-like revenue for the same period.

	Revenue
	£m
2015 Reportable		12,235
Impact of exchange rate changes		1,273		10.4	%
Changes in scope of consolidation		514		4.2	%
Like-for-like growth		367		3.0	%
2016 Reportable		14,389		17.6	%
Impact of exchange rate changes		647		4.5	%
Changes in scope of consolidation		272		1.9	%
Like-for-like growth		(43	)	(0.3	%)
2017 Reportable		15,265		6.1	%

Headline PBIT

Headline PBIT is one of the metrics that management uses to assess the performance of the business.

Headline PBIT is calculated as profit before finance income/costs and revaluation of financial instruments, taxation, gains/losses on disposal of investments and subsidiaries, investment write-downs, goodwill impairment and other goodwill write-downs, amortisation and impairment of acquired intangible assets, Group restructuring costs, IT asset write-downs, share of exceptional gains/losses of associates and gains/losses on remeasurement of equity interests arising from a change in scope of ownership.

A tabular reconciliation of profit before interest and taxation to headline PBIT is provided in note 31 to the consolidated financial statements.

Headline PBT

Headline PBT is one of the metrics that management uses to assess the performance of the business.

Headline PBT is calculated as profit before taxation, gains/losses on disposal of investments and subsidiaries, investment write-downs, goodwill impairment and other goodwill write-downs, amortisation and impairment of acquired intangible assets, Group restructuring costs, IT asset write-downs, share of exceptional gains/losses of associates, gains/losses arising from the revaluation of financial instruments, and gains/losses on remeasurement of equity interests arising from a change in scope of ownership.

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A tabular reconciliation of profit before taxation to headline PBT is shown below.

	Year ended 31 December
	2017 £m			2016 £m			2015 £m
Profit before taxation		2,109.3			1,890.5			1,492.6
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Goodwill impairment		27.1			27.0			15.1
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		—			—			29.1
Share of exceptional (gains)/losses of associates		(0.8	)		15.2			21.8
Revaluation of financial instruments		(262.2	)		48.3			34.7
Headline PBT		2,092.5			1,986.2			1,622.3

Headline EBITDA

Headline EBITDA is a key metric that private equity firms, for example, use for valuing companies, and is one of the metrics that management uses to assess the performance of the business.

Headline EBITDA is calculated as profit before finance income/costs and revaluation of financial instruments, taxation, investment gains/losses and write-downs, goodwill impairment and other goodwill write-downs, amortisation and impairment of intangible assets, IT asset write-downs, share of exceptional losses/gains of associates, depreciation of property, plant and equipment, losses/gains on remeasurement of equity interests arising from a change in scope of ownership and Group restructuring costs.

A tabular reconciliation of profit for the year to headline EBITDA is shown below.

	Year ended 31 December
	2017 £m			2016 £m			2015 £m
Profit for the year		1,912.3			1,501.6			1,245.1
Taxation		197.0			388.9			247.5
Finance income, finance cost and revaluation of financial instruments, net		(87.6	)		222.4			186.4
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Depreciation of property, plant and equipment		230.7			220.8			194.7
Amortisation of other intangible assets		36.3			38.6			33.7
Goodwill impairment		27.1			27.0			15.1
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		—			—			29.1
Share of exceptional (gains)/losses of associates		(0.8	)		15.2			21.8
Headline EBITDA		2,534.1			2,419.7			2,002.4

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Headline operating costs

Headline operating costs is one of the metrics that management uses to assess the performance of the business.

Headline operating costs is calculated as costs of services and general administrative costs excluding media pass-through costs, data collection pass-through costs, other pass-through costs, goodwill impairment, amortisation and impairment of acquired intangible assets, gains/losses on disposal of investments and subsidiaries, investment gains/losses and write-downs, gains/losses on remeasurement of equity interests arising from a change in scope of ownership, IT asset write-downs and Group restructuring costs.

	2017 £m			2016 £m			2015 £m
Costs of services		12,090.2			11,348.1			9,709.1
General and administrative costs		1,267.0			977.7			894.1
		13,357.2			12,325.8			10,603.2
Media pass-through costs		(1,350.0	)		(1,223.2	)		(999.7	)
Data collection pass-through costs		(633.7	)		(661.0	)		(647.2	)
Other pass-through costs		(142.1	)		(106.9	)		(64.0	)
Amortisation and impairment of acquired intangible assets		(195.1	)		(168.4	)		(140.1	)
Goodwill impairment		(27.1	)		(27.0	)		(15.1	)
Gains on disposal of investments and subsidiaries		129.0			44.3			131.0
(Losses)/gains on remeasurement of equity interests arising from a change in scope of ownership		(0.3	)		232.4			165.0
Investment write-downs		(95.9	)		(86.1	)		(78.7	)
Restructuring costs		(56.8	)		(27.4	)		(106.2	)
IT asset write-downs		—			—			(29.1	)
Headline operating costs		10,985.2			10,302.5			8,819.1

Billings

Billings is one of the metrics that management uses to assess the performance of the business.

Billings comprise the gross amounts billed to clients in respect of commission-based/fee-based income together with the total of other fees earned.

Estimated net new billings

Estimated net new billings is one of the metrics that management uses to assess the performance of the business.

Estimated net new billings represent the estimated annualised impact on billings of new business gained from both existing and new clients, net of existing client business lost. The estimated impact is based upon initial assessments of the clients’ marketing budgets, which may not necessarily result in actual billings of the same amount.

Free cash flow

The Group bases its internal cash flow objectives on free cash flow. Management believes free cash flow is meaningful to investors because it is the measure of the Company’s funds available for acquisition related payments, dividends to share owners, share repurchases and debt repayment. The purpose of presenting free cash flow is to indicate the ongoing cash generation within the control of the Group after taking account of the

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necessary cash expenditures of maintaining the capital and operating structure of the Group (in the form of payments of interest, corporate taxation and capital expenditure). Net working capital movements are excluded from this measure since these are principally associated with our media buying activities on behalf of clients and are not necessarily within the control of the Group. This computation may not be comparable to that of similarly titled measures presented by other companies.

Free cash flow is calculated as net cash inflow from operating activities before proceeds from the issue of shares, proceeds from the disposal of property, plant and equipment, movement in trade working capital and other receivables, payables and provisions, less purchases of property, plant and equipment, purchases of other intangible assets and dividends paid to non-controlling interests in subsidiary undertakings.

A tabular reconciliation of net cash inflow from operating activities to free cash flow is shown below.

	Year ended 31 December
	2017 £m			2016 £m			2015 £m
Net cash inflow from operating activities		1,408.1			1,773.8			1,359.9
Share option proceeds		6.4			27.2			27.6
Proceeds on disposal of property, plant and equipment		8.0			7.7			13.4
Movement in trade working capital and other receivables, payables and provisions		531.8			151.3			164.1
Purchases of property, plant and equipment		(288.9	)		(252.1	)		(210.3	)
Purchase of other intangible assets (including capitalised computer software)		(37.3	)		(33.0	)		(36.1	)
Dividends paid to non-controlling interests in subsidiary undertakings		(87.8	)		(89.6	)		(55.2	)
Free cash flow		1,540.3			1,585.3			1,263.4

Net debt and average net debt

Management believes that net debt and average net debt are appropriate and meaningful measures of the debt levels within the Group. This is because of the seasonal swings in our working capital generally, and those resulting from our media buying activities on behalf of our clients in particular, together with the fact that we choose for commercial reasons to locate the debt of the Group in particular countries and leave cash resources in others—though our cash resources could be used to repay the debt concerned.

Net debt at a period end is calculated as the sum of the net borrowings of the Group, derived from the cash ledgers and accounts in the balance sheet. Average net debt is calculated as the average daily net borrowings of the Group.

The following table is an analysis of net debt:

	2017 £m			2016 £m			2015 £m
Debt financing		(6,874.5	)		(6,567.4	)		(5,593.2	)
Cash and short-term deposits		2,391.4			2,436.9			2,382.4
Net debt		(4,483.1	)		(4,130.5	)		(3,210.8	)

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Use of Estimates

The preparation of consolidated financial statements requires management to make estimates, judgements and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingencies at the date of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates.

Critical Accounting Policies

The Company’s consolidated financial statements have been prepared in accordance with IFRS as issued by the IASB. A summary of the Group’s principal accounting policies is provided in the Accounting Policies section of the consolidated financial statements. The Company believes certain of these accounting policies are particularly critical to understanding the more significant judgements and estimates used in the preparation of its consolidated financial statements. Therefore, we have prepared the following supplemental discussion of critical accounting policies, which should be read together with our consolidated financial statements and notes thereto.

Goodwill and other intangibles

The Company has a significant amount of goodwill and other intangible assets. In accordance with the Group’s accounting policy, the carrying values of goodwill and intangible assets with indefinite useful lives are reviewed for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.

The impairment review is undertaken annually on 30 September. Under IFRS, an impairment charge is required for both goodwill and other indefinite lived assets when the carrying amount exceeds the ‘recoverable amount’, defined as the higher of fair value less costs to sell and value in use. Our approach in determining the recoverable amount utilises a discounted cash flow methodology, which necessarily involves making numerous estimates and assumptions regarding revenue growth, operating margins, appropriate discount rates and working capital requirements. These estimates will likely differ from future actual results of operations and cash flows, and it is possible that these differences could be material. In addition, judgements are applied in determining the level of cash-generating unit identified for impairment testing and the criteria used to determine which assets should be aggregated. A difference in testing levels could affect whether an impairment is recorded and the extent of impairment loss. Changes in our business activities or structure may also result in changes to the level of testing in future periods. Further, future events could cause the Company to conclude that impairment indicators exist and that the asset values associated with a given operation have become impaired. Any resulting impairment loss could have a material impact on the Company’s financial condition and results of operations.

Historically our impairment losses have resulted from a specific event, condition or circumstance in one of our companies, such as the loss of a significant client. As a result, changes in the assumptions used in our impairment model have not had a significant effect on the impairment charges recognised. The carrying value of goodwill and other intangible assets will continue to be reviewed at least annually for impairment and adjusted down to the recoverable amount if required.

The most significant assumptions employed by the Company in determining recoverable amounts are as follows:

• Future cash flows derived from each cash-generating unit are based on a projection period of up to five years. The key assumptions used for estimating cash flow projections in the Group’s impairment testing are those relating to revenue growth and operating margin. The key assumptions take account of the businesses’ expectations for the projection period. These expectations consider the macroeconomic environment, industry and market conditions, the unit’s historical performance and any other circumstances particular to the unit, such as business strategy and client mix;

• After the projection period, there is an assumed annual long-term growth rate of 3.0% (2016: 3.0%), with no improvements in operating margins. Management have made the judgement that this long-term growth rate does not exceed the long-term growth rate for the industry; and

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• The net present value of the future cash flows was calculated using a pre-tax discount rate of 8.5% (2016: 8.5%).

Acquisition accounting

The Group accounts for acquisitions in accordance with IFRS 3 ‘Business Combinations’. IFRS 3 requires the acquiree’s identifiable assets, liabilities and contingent liabilities (other than non-current assets or disposal groups held for sale) to be recognised at fair value at acquisition date. In assessing fair value at acquisition date, management make their best estimate of the likely outcome where the fair value of an asset or liability may be contingent on a future event. In certain instances, the underlying transaction giving rise to an estimate may not be resolved until some years after the acquisition date. IFRS 3 requires the release to profit of any acquisition reserves which subsequently become excess in the same way as any excess costs over those provided at acquisition date are charged to profit. At each period end, management assess provisions and other balances established in respect of acquisitions for their continued probability of occurrence and amend the relevant value accordingly through the consolidated income statement or as an adjustment to goodwill as appropriate under IFRS 3. In 2017, operating profit includes credits totalling £44.8 million (2016: £26.3 million, 2015: £31.6 million) relating to the release of excess provisions and other balances established in respect of acquisitions completed prior to 2016.

Future anticipated payments to vendors in respect of contingent consideration (earnout agreements) are initially recorded at fair value which is the present value of the expected cash outflows of the obligations. The obligations are dependent on the future financial performance of the interests acquired (typically over a four- to five-year period following the year of acquisition) and assume the operating companies improve profits in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition. Subsequent adjustments to the fair value are recorded in the consolidated income statement within revaluation of financial instruments. A summary of earnout related obligations included in trade and other payables is shown in note 19 to the consolidated financial statements.

WPP has also entered into option agreements that allow the Group’s equity partners to require the Group to purchase the non-controlling interest. These agreements are treated as derivatives over equity instruments and are recorded in the consolidated balance sheet initially at the present value of the redemption amount in accordance with IAS 32 Financial Instruments: Presentation and subsequently measured at fair value in accordance with IAS 39 Financial Instruments: Recognition and Measurement. The movement in the fair value is recognised as income or expense within revaluation of financial instruments in the consolidated income statement.

Actual performance may differ from the assumptions used resulting in amounts ultimately paid out with respect to these earnout and option agreements at more or less than the recorded liabilities. Estimates are required regarding growth rates in deriving future financial performance and discount rates to be applied when measuring the liabilities for earnout and option agreements. The assumptions and sensitivity to changes in these assumptions is shown in note 25 to the consolidated financial statements.

Revenue recognition

Advertising and Media Investment Management revenue is typically derived from commissions on media placements and fees for advertising services. Revenue may consist of various arrangements involving commissions, fees, incentive-based revenue or a combination of the three, as agreed upon with each client.

Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. Incentive-based revenue typically comprises both quantitative and qualitative elements; on the element related to quantitative targets, revenue is recognised when the quantitative targets have been achieved; on the element related to qualitative targets, revenue is recognised when the incentive is received or receivable.

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The Group receives volume rebates from certain suppliers for transactions entered into on behalf of clients that, based on the terms of the relevant contracts and local law, are either remitted to clients or retained by the Group. If amounts are passed on to clients they are recorded as liabilities until settled or, if retained by the Group, are recorded as revenue when earned.

In applying the proportional performance method of revenue recognition for both market research and other long-term contracts, management is required to make significant judgements, estimates and assumptions. In assessing contract performance, both input and output criteria are reviewed. Costs incurred are used as an objective input measure of performance. The primary input of all work performed under these arrangements is labour. As a result of the relationship between labour and cost, there is normally a direct relationship between costs incurred and the proportion of the contract performed to date. Costs incurred as a proportion of expected total costs is used as an initial proportional performance measure. This indicative proportional performance measure is subsequently validated against other more subjective criteria (i.e. relevant output measures) such as the percentage of interviews completed, percentage of reports delivered to a client and the achievement of any project milestones stipulated in the contract. In the event of divergence between the objective and more subjective measures, the more subjective measures take precedence since these are output measures.

Since project costs can vary from initial estimates, the reliance on total project cost estimate represents an uncertainty inherent in the revenue recognition process. Individual project budgets are reviewed regularly with project leaders to ensure that cost estimates are based upon up to date and as accurate information as possible, and take into account any relevant historic performance experience. Also, the majority of contracted services subject to proportional performance method revenue recognition are in relation to short term projects, averaging approximately 3 months. Due to this close and frequent monitoring of budgeted costs and the preponderance of short term projects, the impact of variances between actual and budgeted project costs has historically been minimal. The Company does not believe that the effect of these uncertainties, taken as a whole, will significantly impact their results of operations in the future.

Pension costs

Pension costs are assessed in accordance with the advice of local independent qualified actuaries. The latest full actuarial valuations for the various plans were carried out at various dates in the last three years. These valuations have been updated by the local actuaries to 31 December 2017.

The Group’s policy is to close existing defined benefit plans to new members. This has been implemented across a significant number of pension plans. As a result, these plans generally have an ageing membership population. In accordance with IAS 19, Defined Benefit Plans, the actuarial calculations have been carried out using the projected unit credit method. In these circumstances, use of this method implies that the contribution rate implicit in the current service cost will increase in future years.

The Group’s pension deficit was £205.4 million at 31 December 2017, compared to £275.6 million at 31 December 2016. The decrease in the deficit is primarily due to an increase in funding and investment returns.

There are a number of areas in the pension accounting that involve judgements made by management based on the advice of qualified advisors. These include establishing the discount rates, rate of increase in salaries and pensions in payment, inflation and mortality assumptions. A sensitivity analysis for each significant actuarial assumption is shown in note 23 to the consolidated financial statements.

Most of the Group’s pension plan assets are held by its plans in the UK and North America. Management considers the types of investment classes in which the pension plan assets are invested. The types of investment classes are determined by economic and market conditions and in consideration of specific asset class risk.

Management periodically commissions detailed asset and liability studies performed by third-party professional investment advisors and actuaries that generate probability-adjusted expected future returns on those assets.

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These studies also project the estimated future pension payments and evaluate the efficiency of the allocation of the pension plan assets into various investment categories.

Taxation

Corporate taxes are payable on taxable profits at current rates. The tax expense represents the sum of the tax currently payable and deferred tax.

The Group is subject to corporate taxes in a number of different jurisdictions and judgement is required in determining the appropriate provision for transactions where the ultimate tax determination is uncertain. In such circumstances, the Group recognises liabilities for anticipated taxes based on the best information available and where the anticipated liability is both probable and estimable, liabilities are classified as current. Any interest and penalties accrued are included in corporate income taxes both in the consolidated income statement and balance sheet. Where the final outcome of such matters differs from the amount recorded, any differences may impact the income tax and deferred tax provisions in the period in which the final determination is made.

We record deferred tax assets and liabilities using tax rates that are expected to apply in the period when the liability is settled or the asset is realised based on enacted, or substantively enacted legislation, for the effect of temporary differences between book and tax bases of assets and liabilities. Currently we have deferred tax assets resulting from operating loss carryforwards and deductible temporary differences, all of which could reduce taxable income in the future. Based on available evidence, both positive and negative, we determine whether it is probable that all or a portion of the deferred tax assets will be realised. The main factors that we consider include:

• the future earnings potential determined through the use of internal forecasts;

• the cumulative losses in recent years;

• the various jurisdictions in which the potential deferred tax assets arise;

• the history of losses carried forward and other tax assets expiring;

• the timing of future reversal of taxable temporary differences;

• the expiry period associated with the deferred tax assets; and

• the nature of the income that can be used to realise the deferred tax asset.

If it is probable that some portion of these assets will not be realised, then no asset is recognised in relation to that portion. At 31 December 2017, no deferred tax asset has been recognised in respect of gross tax losses and other temporary differences of £3,169.9 million.

If market conditions improve and future results of operations exceed our current expectations, our existing recognised deferred tax assets may be adjusted, resulting in future tax benefits. Alternatively, if market conditions deteriorate further or future results of operations are less than expected, future assessments may result in a determination that some or all of the deferred tax assets are not realisable. As a result, we may need to reverse all or a portion of the deferred tax assets, which may have a significant effect on our results of operations and financial condition.

New IFRS Accounting Pronouncements

See page F-7 of the consolidated financial statements for a description of new IFRS accounting pronouncements.

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ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES

A. Directors and Senior Management

The directors and executive officers of the Company are as follows:

Roberto Quarta, Age 68: Executive Chairman. Roberto Quarta was appointed as a Director with effect from 1 January 2015 and became chairman of WPP in June 2015. He is Chairman of Smith & Nephew plc, Partner of Clayton, Dubilier & Rice, and Chairman of Clayton, Dubilier & Rice Europe, a private equity firm. Previously, he was Chief Executive and then Chairman of BBA Group plc, Chairman of Rexel SA and a Non-Executive Director at BAE Systems plc, Equant NV, Foster Wheeler AG and PowerGen plc. Mr Quarta’s career in private equity brings valuable experience to WPP, particularly when evaluating acquisitions and new business opportunities. He has an in-depth understanding of differing global governance requirements having served as a director and Chairman of a number of UK and international companies.

Other current appointments: Chairman, Smith & Nephew plc.

Paul Richardson, Age 60: Group Finance Director. Paul Richardson became Group Finance Director of WPP in 1996 after four years with the Company as director of treasury. He is responsible for the Group’s worldwide functions in finance, IT, procurement, property, treasury, taxation, internal audit and sustainability. He is a chartered accountant and fellow of the Association of Corporate Treasurers.

Jacques Aigrain, Age 63: Non-Executive Director. Jacques Aigrain was appointed a Director of WPP on 13 May 2013. He is currently a Senior Advisor at Warburg Pincus LLP. He was on the Executive Committee of Swiss Re AG from 2001 to 2009 including CEO from 2006, and prior to that, he spent 20 years with JPMorgan Chase in New York, London and Paris. Mr Aigrain is a Non-Executive Director of London Stock Exchange Group Plc and a Supervisory Board Member of LyondellBasell NV and Swiss International Airlines AG (retiring in June 2018). He was Chairman of LCH Clearnet Group Ltd from 2010 to March 2015, and served as a Director of the Qatar Financial Center Authorities and Supervisory Board Member of Lufthansa AG. He holds a PhD in Economics from Sorbonne University and an MA in Economics from Paris Dauphine University.

Other current appointments: Non-Executive Director, London Stock Exchange Group plc. Supervisory Board Member, LyondellBasell NV. Supervisory Board Member, Swiss International Airlines AG.

Tarek Farahat, Age 53: Non-Executive Director. Tarek Farahat was appointed a Director with effect from 11 October 2016. He has more than 30 years of experience in the branded goods business. He worked for P&G for more than 26 years in Europe, the Middle East and Latin America. His last position at P&G was President of P&G Latin America. Among Mr Farahat’s achievements is the expansion of the Pampers business in emerging markets and business turnaround for P&G in Brazil. Mr Farahat was previously Chairman of the board of JBS and a board member of Pilgrims. He currently serves as strategic advisor and consultant.

Sir John Hood, Age 66: Non-Executive Director. Sir John Hood was appointed a Director on 1 January 2014. An international education and business leader, Sir John was formerly Vice-Chancellor of the University of Oxford and of the University of Auckland. In New Zealand, he served as Chairman of Tonkin & Taylor Ltd and as Non-Executive Director of Fonterra Co-operative Group and ASB Bank Ltd. Sir John currently serves as President & CEO of the Robertson Foundation, Chairman of Study Group Limited and BMT Group and Chair of the Rhodes Trust. Sir John also serves on the board of Aurora Energy Research. Sir John earned his PhD in Civil Engineering from the University of Auckland and then won a Rhodes Scholarship to Oxford, where he was awarded an MPhil in Management Studies. Sir John has been appointed a Knight Companion to the New Zealand Order of Merit.

Other current appointments: President and CEO, Robertson Foundation. Chairman, Study Group Limited. Chairman, BMT Group.

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Ruigang Li, Age 48: Non-Executive Director. Ruigang Li was appointed a Director of WPP on 12 October 2010. He is the Founding Chairman and CEO of CMC Capital Partners and CMC Holdings (collectively CMC), China’s leading investment and operating group in media and entertainment, internet and technology, lifestyle and consumer sectors. Ruigang Li has led CMC to create a number of champions and emerging leaders in key sub-sectors including film, television, animation, entertainment and sports agency, news and financial media, social media, sports, music, live entertainment and education. Mr Li was the Chairman and President of Shanghai Media Group (SMG) for over 10 years and successfully transformed SMG into China’s leading media conglomerate. Mr Li was previously Chief of Staff of Shanghai Municipal Government.

Other current appointments: Chairman, CEO of CMC Capital Partners. Chairman, CEO of CMC Holdings. Board Member of City Football Group. Board Director of CAA (Creative Artists Agency). Vice Chairman of TVB (Hong Kong). Chairman of Shaw Brothers (Hong Kong). Board Member of Special Olympics.

Daniela Riccardi, Age 58: Non-Executive Director. Daniela Riccardi was appointed a Director on 12 September 2013. FMCG, retail-and-fashion products executive, she is Chief Executive Officer of Baccarat, the international luxury goods company, and was Chief Executive Officer of Diesel Group. She was an executive at P&G for 25 years, including service as President of P&G Greater China, with 7,000 employees, and Vice President-General Manager for P&G Eastern Europe & Russia. Ms Riccardi also sits on the Boards of Kering and of Comite Colbert. Ms Riccardi has been a guest lecturer at the Grenoble Ecole de Management in Paris. Ms Riccardi is a Magna Cum Laude graduate in Political Science and International Studies at Sapienza University of Rome and completed a Fellowship in Marketing at Yale University.

Other current appointments: CEO, Baccarat. Non-Executive Director, Kering. Non-Executive Director, Comite Colbert.

Nicole Seligman, Age 61: Non-Executive Director, Senior Independent Director. Nicole Seligman was appointed a Director on 1 January 2014. Most recently, she served as President of Sony Entertainment, Inc. and Sony Corporation of America and Sony Group Senior Legal Counsel. Previously, until 2014, she was Executive Vice President and General Counsel for Sony Corporation. Prior to that, as a partner in the Washington law firm of Williams & Connolly, Ms Seligman counselled a wide range of clients, including major media companies, on complex litigation and commercial matters. She is a Magna Cum Laude graduate of both Harvard College and Harvard Law School. Ms Seligman currently serves on the Board of Viacom Inc. and is Chairman of The Doe Fund, a New York-based non-profit organization.

Other current appointments: Non-Executive Director, Viacom Inc.

Hugo Shong, Age 62: Non-Executive Director. Hugo Shong was appointed a Director on 13 May 2013. He is the Global Chairman of IDG Capital. He joined IDG in 1991 and in 1993, helped IDG to set up the first technology venture fund in China, IDG Capital, which now has an investment portfolio including Baidu, Tencent (QQ), Sohu, Ctrip, Soufun and Xiaomi. Mr Shong currently serves on the board of Mei Ah Entertainment Group, a Hong Kong listed company with interests in television, film and theatre. Mr Shong is a member of the board of trustees of Boston University. Mr Shong holds a degree from Hunan University, attended the Chinese Academy of Social Sciences and holds a Master of Science from Boston University. Mr Shong has completed the Advanced Management Program at Harvard Business School.

Other current appointments: Chairman, IDG Capital. Global Chairman, IDG Capital. Non-Executive Director, Mei Ah Entertainment Group. Independent Director, China Unicom. Non-Executive Director, IDG Energy Investment Group Limited. Non-Executive Director, HJ Capital (International) Holdings Company Limited.

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Sally Susman, Age 56: Non-Executive Director. Sally Susman was appointed a Director on 13 May 2013. She is currently executive vice president, Corporate Affairs for Pfizer, the world’s largest biopharmaceutical company. Ms Susman also heads the firm’s corporate responsibility group and plays a key role in shaping policy initiatives. Before joining Pfizer in 2007, Ms Susman was EVP of Global Communications at Estée Lauder, where she directed global corporate affairs strategy and served as a member of the Executive Committee. Ms Susman held several senior corporate affairs posts at American Express, working in both London and the US. She started her career in government service focused on international trade issues and her positions included Deputy Assistant Secretary for Legislative and Intergovernmental Affairs in the US Department of Commerce. She serves on the board of the International Rescue Committee. Ms Susman holds a BA in Government from Connecticut College in the US and has studied at the London School of Economics.

Solomon D. (Sol) Trujillo, Age 66: Non-Executive Director. Solomon D. (Sol) Trujillo was appointed a Director of WPP on 12 October 2010. He is an international business executive with three decades of experience as CEO of high-cap global companies in the US, the EU and Asia Pacific. A digital pioneer and long-time practitioner of market-based management, Mr Trujillo was an early champion of high-speed broadband and the mobile internet to stimulate productivity and innovation across all sectors of the economy. Mr Trujillo currently sits on corporate boards in the US, EU and China and has managed operations in more than 25 countries including developed and emerging markets from the EU and North America to China, Australasia, Africa and the Middle East. He is Chairman of Trujillo Group LLC which he uses to manage investments and to examine emerging trends in the broader digital space, from changing mobility platforms to artificial intelligence (AI). Mr Trujillo is the Chair and Co-founder of the Latino Donor Collaborative (LDC), comprised of the most senior US Latino business leaders.

Other current appointments: Director, Unlockd. Director, Western Union. Director, Silk Road Telecommunications.

The independence of each non-executive director is assessed annually by the Board under the UK Corporate Governance Code which applies in respect of WPP’s primary listing on the London Stock Exchange. The Board has confirmed that all of the non-executives standing for re-election at the 2017 Annual General Meeting (AGM) continue to demonstrate the characteristics of independence.

Mark Read, Age 51: Chief Operating Officer. Mark Read was appointed joint Chief Operating Officer of WPP on 16 April 2018, reporting to Executive Chairman Roberto Quarta. Mark works alongside Andrew Scott to lead the business and develop WPP’s strategy. He has specific responsibility for the Group’s clients, operating companies and people. Mark has held multiple leadership positions across the Group, including Executive Director of WPP plc, Head of Strategy and CEO of WPP Digital. For 12 years Mark was responsible for the Group’s digital development, including the move into technology through the acquisition of 24/7 Real Media, and the creation of POSSIBLE and Stream, WPP’s celebrated “unconference”. In 2015, he was appointed CEO of Wunderman, transforming the network into one of the world’s leading customer-focused digital agencies. Earlier in his career, Mark founded and developed WebRewards, a UK startup that was sold to Bertelsmann in 2001. He also specialised in the media and marketing industries as a principal at Booz Allen & Hamilton, having started his career at the WPP parent company working on corporate development. Mark has an MBA from INSEAD and an economics degree from Trinity College, Cambridge University, and was a Henry Fellow at Harvard University. He is the Chairman of the Natural History Museum Digital Council. Wired ranked him as one of the Top 25 Digital Influencers in Europe in 2014 and he was twice named The Drum’s Digital Individual of the Year.

Andrew Scott, Age 49: Chief Operating Officer. Andrew Scott was appointed joint Chief Operating Officer of WPP on 16 April 2018, reporting to Executive Chairman Roberto Quarta. Andrew works alongside Mark Read to lead the business and develop WPP’s strategy. He has specific responsibility for the Group’s financial and operational performance and implementing the ongoing reorganisation of WPP’s portfolio. Andrew joined WPP in 1999 as Director of Corporate Development, working in London and New York, and was appointed to lead

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WPP’s Specialist Communications division in 2009. He was named Chief Operating Officer, WPP Europe, in March 2013, focusing on the strategy and structure of WPP’s businesses in the UK and Continental Europe (including Turkey and Russia). Andrew has extensive leadership, strategic and corporate development experience. He has been responsible for the Group’s Mergers & Acquisitions activity, completing numerous acquisitions and minority investments. Through transactions such as Essence, VML, AKQA, 24/7, Y&R Group, Cordiant and TNS, he has played a critical role in building WPP – not least its digital capabilities. Andrew spent his earlier career at global strategy consulting firm L.E.K. Consulting, where he focused on projects related to clients’ most pressing strategic issues and opportunities. In London, Cape Town and Sydney he worked across strategy, operations and organisational transformation in a range of industry sectors. He graduated with distinction from the INSEAD MBA programme in 1996. He holds a post graduate certificate in Design, Manufacture and Management from Cambridge University and a First-Class Honours degree in Mechanical Engineering from Bath University.

B. Compensation

Directors’ Compensation

For the fiscal year ended 31 December 2017 the aggregate compensation paid by WPP to all directors and officers of WPP as a group for services in all capacities was £20.3 million. Such compensation was paid by WPP and its subsidiaries primarily in the form of salaries, performance-related bonuses, other benefits and deferred share awards. The sum of £0.7 million was set aside and paid in the last fiscal year to provide pension benefits for directors and officers of WPP.

Executive Directors’ total compensation received

Single total figure of compensation

2017	Base salary3		Benefits4		DEPs5		Pension6		Short-term incentive		Long-term incentive7		Total annual compensation
	£000		£000		£000		£000		£000		£000		£000
Sir Martin Sorrell1		1,149		200		2,170		402		—		10,009		13,930
Paul Richardson1,2		833		66		—		249		—		2,725		3,873

¹  Any US dollar amounts received in 2017 have been converted into sterling at an exchange rate of $1.2887 to £1.

²  Paul Richardson’s base salary figure is denominated in US dollars other than his fee for directorship of WPP plc which amounts to £100,000 which, per above, has been converted at an exchange rate of $1.2887 to £1.

³  Base salary levels are reviewed every two years or following a change in role and will normally increase by no more than the local rate of inflation. Company and personal performance are taken into account during review process.

⁴  Benefits are fixed, non-itemised allowances enabling executives to procure their own benefits as required. The benefits, and therefore total annual compensation, set out in the table above exclude the disclosable value of expenses related directly to attendance at Board meetings that would be chargeable to UK income tax. The expenses were for Sir Martin Sorrell £4,492 and Paul Richardson £8,307.

⁵  Sir Martin Sorrell receives payments in accordance with the approval granted by share owners of amounts equal to the dividends that would be payable during 2017 totalling £2,169,831, in respect of the shares reflected in the UK and US Deferred Stock Units (DSUs) Awards Agreements, these agreements that now comprise the awards granted under the Capital Investment Plan in 1995. 2017 is the final year in which such payments will be made.

⁶  Pension is provided by way of contribution to a defined contribution retirement arrangement, or a cash allowance, determined as a percentage of base salary. Contributions/allowances are as follows (as % of base salary): Group Chief Executive—30% and Group Finance Director—30%. The new Directors’ Compensation Policy that was approved in June 2017 reduced the pension for Sir Martin Sorrell from 40% to 30% of base salary. This came into effect on 1 July 2017. Therefore, the amounts included in the table above represent six months under the old policy at 40% of base salary and six months under the new policy at 30% of base salary. There was no change for Paul Richardson.

⁷  This is the value of the 2013 Executive Performance Share Plan (EPSP) awards which vested in 2018 following the end of the five-year performance period on 31 December 2017.

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2013 – 2017 EPSP awards vesting

The 2013 awards are the first set of awards made under the EPSP that was approved by share owners at the AGM in 2013. The EPSP replaced the Leadership Equity Acquisition Plan (LEAP) and was designed to take account of share owner views gained during an extensive consultation process. Vesting of the 2013 EPSP awards was dependent on performance against three measures, which include relative Total Shareholder Return (‘TSR’), Earnings Per Share (‘EPS’) growth and average annual Return On Equity (‘ROE’), all assessed over a five year performance period. The following table summarises the vested awards under the EPSP in 2017.

	Number of shares awarded		Additional shares in respect of dividend accrual		Number of shares vesting		Share price on vesting		Value of vested 2013-2017 EPSP awards 000
Sir Martin Sorrell		1,032,540		147,003		858,730	£	11.6554	£	10,009
Paul Richardson1		52,026		7,478		43,320	$	81.0566	$	3,511

¹  Paul Richardson’s 2013 EPSP awards were granted in respect of ADRs.

Outstanding share-based awards

Executive Share Awards (ESAs) held by Executive Directors

All Executive Share Awards granted under the Restricted Stock Plan are made on the basis of satisfaction of previous performance conditions and are subject to continuous employment until the vesting date. Due to no short-term incentive being awarded for 2017, there will be no 2017 ESAs granted. Unless otherwise noted, awards are made in the form of WPP ordinary shares.

		Grant date		Share/ADR price on grant date		No. of Shares/ADRs granted2		Face value on grant date3 000		Additional shares granted in lieu of dividends		Total shares vesting		Vesting date		Shares/ADR price on vesting		Value on vesting 000
Sir Martin Sorrell	2014 ESA		27.05.15		£15.8350		113,347		£1,795		6,762		120,109		06.03.17		£17.1957		£2,065
	2015 ESA		07.06.16		£15.9850		133,817		£2,139		—		—		06.03.18		—		—
	2016 ESA		06.06.17		£17.2050		86,955		£1,496		—		—		06.03.19		—		—
Paul Richardson1	2014 ESA		27.05.15		$121.7200		9,817		$1,195		601		10,418		06.03.17	$	104.6582		$1,090
	2015 ESA		07.06.16		$116.2700		10,837		$1,260		—		—		06.03.18		—		—
	2016 ESA		06.06.17		$110.7600		9,280		$1,028		—		—		06.03.19		—		—

¹  Paul Richardson’s ESAs were granted in respect of ADRs.

²  Dividend shares will be due on these awards.

³  Face value has been calculated using the average closing share price for the trading day preceding the date of grant (as set out in the table).

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Long-term incentive plans – EPSP

The following table summarises all of the awards outstanding under the EPSP.

	Grant date		Performance period		Maximum number of nil cost options over shares/ADRs awarded2		Share/ ADR price on grant date3		During 2017
									Options vested/ (lapsed)		Additional dividend shares		Options exercised or deferred		Maximum number of nil cost options over shares/ADRs at 31 December 2017
Sir Martin Sorrell		04.06.14		01.01.14-31.12.18		867,756	£	12.9080		—		—		—		867,756
		09.06.15		01.01.15-31.12.19		738,267	£	15.1720		—		—		—		738,267
		28.11.16		01.01.16-31.12.20		656,873	£	17.0520		—		—		—		656,873
		04.12.17		01.01.17-31.12.21		534,428	£	12.9110		—		—		—		534,428
Paul Richardson1		04.06.14		01.01.14-31.12.18		40,927	$	107.9960		—		—		—		40,927
		09.06.15		01.01.15-31.12.19		37,970	$	115.8800		—		—		—		37,970
		28.11.16		01.01.16-31.12.20		41,536	$	105.9309		—		—		—		41,536
		04.12.17		01.01.17-31.12.21		36,933	$	86.9138		—		—		—		36,933

¹  Paul Richardson’s EPSP awards were granted in respect of ADRs.

²  Dividend shares will be due on these awards.

³  Face value has been calculated using the average closing share price for the five trading days preceding the date of grant (as set out in the table).

Non-Executive Directors’ total compensation received

The single total figure of compensation table below details fee payments received by the Non-Executive Directors while they held a position on the Board.

	Fees £000
	2017
Roberto Quarta		475
Jacques Aigrain		130
Charlene Begley1		44
Tarek Farahat		87
Sir John Hood		110
Ruigang Li		80
Daniela Riccardi		80
Nicole Seligman		91
Hugo Shong		80
Timothy Shriver1		39
Sally Susman		80
Sol Trujillo		90

¹  Charlene Begley and Timothy Shriver retired from the Board 7 June 2017.

Past directors

During 2017, payments were made to past directors who continued to provide advisory services to the Company. A payment of £21,768 was made to John Quelch in respect of educational presentations he gave to companies within the WPP Group. A payment of £30,000 was made to John Jackson in respect of his advisory role to WPP, which enables the Company to benefit from his considerable knowledge and experience in the communications and marketing services sector. Since his retirement from the Board, Timothy Shriver has been appointed as a consultant advising the Company on certain client relationships. He received a payment of £38,000 for his consultancy services.

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The full Directors’ Compensation Policy can be found at www.wpp.com/wpp/about/howwebehave/governance. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

C. Board Practices

The role of the Board

The Board is collectively responsible for promoting the success of the Company by directing and supervising the Company’s policy and strategy and is responsible to share owners for the Group’s financial and operational performance and risk management. Responsibility for the development and implementation of Group policy and strategy and for day-to-day management issues is delegated by the Board to the Executive Directors and until the appointment of the new Group Chief Executive, the Chief Operating Officers. The list of matters reserved to the Board can be downloaded from the website www.wpp.com/wpp/about/howwebehave/governance. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

Following the resignation of the Group Chief Executive on 14 April 2018, the Board has implemented the succession plans it had in place in the event of a sudden departure and has appointed Roberto Quarta as Executive Chairman and two Chief Operating Officers, Mark Read and Andrew Scott. The Board has commenced the recruitment process for a new Group Chief Executive with the assistance of an external search firm which had already been working with the Board and which will consider both the pool of internal candidates already identified and external candidates. The recruitment process will be conducted in a timely and efficient manner.

Re-election

The directors submit themselves for annual re-election at each AGM, if they wish to continue serving and are considered by the Board to be eligible. Directors may be appointed by share owners by ordinary resolution or by the Board on the recommendation of the Nomination and Governance Committee and must then stand for re-election at the next AGM, where they may be re-elected by ordinary resolution of the share owners. Refer to Item 6A for the appointment date of each director.

Service contracts

The Company’s policy on Executive Directors’ service contracts is that they should be on a rolling basis without a specific end date. The effective dates and notice periods under the current Executive Directors’ service contracts are summarised below:

	Effective from		Notice period
Sir Martin Sorrell		19 November 2008		‘At will’
Paul Richardson		19 November 2008		12 months

Sir Martin Sorrell’s service contract may be terminated by either the Company or Sir Martin without any notice, and without any payment in lieu of notice.

The Executive Directors’ service contracts are available for inspection at the Company’s registered office and head office.

Loss of office provisions

Fixed compensation elements

As noted above, the service contract of Paul Richardson provides for notice to be given on termination.

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The fixed compensation elements of the contract will continue to be paid in respect of any notice period. There are no provisions relating to payment in lieu of notice. If an Executive Director is placed on garden leave, the Compensation Committee retains the discretion to settle benefits in the form of cash. The Executive Directors are entitled to compensation for any accrued and unused holiday although, to the extent it is possible and in share owner interests, the Committee will encourage Executive Directors to use their leave entitlements, prior to the end of their notice period.

Except in respect of any remaining notice period, no aspect of any Executive Director’s fixed compensation is payable on termination of employment. Sir Martin Sorrell’s service contract contains an indemnity, subject to certain conditions relating to previously deferred awards, from WPP in respect of any US tax which is charged under section 280G as a result of a termination linked to a change in control of WPP. Further details are set out below.

Short- and long-term compensation elements

If the Executive Director is dismissed for cause, there is not entitlement to a STIP award, and any unvested share-based awards will lapse. Otherwise, the table below summarises the relevant provisions from the directors’ service contracts (cash bonus) and the plan rules (Restricted Stock Plan (RSP) and EPSP), which apply in other leaver scenarios. The Committee has the authority to ensure that any awards that vest or lapse are treated in accordance with the plan rules, which are more extensive than the summary set out in the table below.

Cash bonus	The Executive Directors are entitled to receive their bonus for any particular year provided they are employed on the last date of the performance period.
ESA	Provided the Executive Director is a Good Leaver, unvested awards will be reduced on a time pro-rata basis and paid on the vesting date.
EPSP	•  The award will lapse if the executive leaves during the first year of a performance period.
	•  Provided the Executive Director is a Good Leaver, awards will vest subject to performance at the end of the performance period and time pro-rating. Awards will be paid on the normal date.
	•  In exceptional circumstances, the Compensation Committee may determine that an award will vest on a different basis.
	•  Generally, in the event of death, the performance conditions are to be assessed as at the date of death. However, the Committee retains the discretion to deal with an award due to a deceased executive on any other basis that it considers appropriate.
	•  Awards will vest immediately on a change of control subject to performance and time pro-rating unless it is agreed by the Committee and the relevant Executive Director that the outstanding awards are exchanged for equivalent new awards.

Other pre-existing terms that apply to Sir Martin Sorrell

• Sir Martin Sorrell’s deferred LEAP awards and his DSUs will be paid out unconditionally on termination of employment. The performance requirements in respect of these awards have already been met, the awards have vested and are therefore no longer subject to any leaver provisions.

• In the event any payments due to Sir Martin would be treated as ‘deferred compensation’ in accordance with US legislation and subject to section 409A requirements, those payments will be delayed. If those payments are delayed, an amount in respect of interest as a result of the delay will be due from the Company to Sir Martin.

• In the event of a change of control of WPP, the Company has agreed to indemnify Sir Martin, with the prior approval of share owners, with respect to any related personal US tax liability under the provisions

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of section 280G. This indemnity is subject to certain limitations that exempt the Company from liability for any tax related to the share owner approved deferrals of certain awards. Based on the most recent review by the Committee of the potential impact of this clause, it is unlikely that any 280G payment would be due from the Company based on an analysis, using standard assumptions. This was reviewed by independent counsel.

Other Compensation Committee discretions not set out above

• Leaver status: the Committee has the discretion to determine an executive’s leaver classification in light of the guidance set out within the relevant plan rules, except with respect to Sir Martin Sorrell. Unless Sir Martin Sorrell is terminated for cause, he will be treated as having retired on leaving the Company and therefore be treated in accordance with the plan rules as a Good Leaver.

• Settlement agreements: the Committee is authorised to reach settlement agreements with departing executives, informed by the default position set out above.

Other chairman and non-executive director policies

Letters of appointment for the chairman and non-executive directors

Letters of appointment have a two-month notice period and there are no payments due on loss of office.

Appointments to the Board

The chairman and non-executive directors are not eligible to receive any variable pay. Fees for any new non-executive directors will be consistent with the operating policy at their time of appointment. In respect of the appointment of a new chairman, the Committee has the discretion to set fees taking into account a range of factors including the profile and prior experience of the candidate, cost and external market data.

Payments in exceptional circumstances

In truly unforeseen and exceptional circumstances, the Compensation Committee retains the discretion to make emergency payments which might not otherwise be covered by this policy. The Committee will not use this power to exceed the recruitment policy limit, nor will awards be made in excess of the limits set out in the Directors’ Compensation Policy table. An example of such an exceptional circumstance could be the untimely death of a director, requiring another director to take on an interim role until a permanent replacement is found.

Compensation Committee

Compensation Committee members and attendance during 2017
	Meetings eligible to attend		Meetings attended
Sir John Hood (Chairman)		7		7
Jacques Aigrain		7		7
Roberto Quarta		7		7
Timothy Shriver1		5		5
Nicole Seligman2		0		0

¹Timothy Shriver retired from the Board in June 2017.

²Nicole Seligman was appointed to the Compensation Committee on 14 December 2017.

During 2017, the Compensation Committee met seven times on a formal basis, with additional informal meetings held as needed.

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The Committee members do not have any personal financial interest (other than as a share owner as disclosed on page 48) in the matters to be decided by the Committee, potential conflicts of interest arising from cross-directorships or day-to-day involvement in running the Group’s businesses. The terms of reference for the Compensation Committee are available on the Company’s website, http://www.wpp.com/wpp/about/howwebehave/governance/, and will be on display at the AGM, as set out in the Notice of AGM. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

The Committee’s principal responsibilities under its terms of reference include:

• reviewing and approving the Company’s compensation strategy;

• determining appropriate remuneration for executive directors;

• approving the service agreements and severance arrangements for executive directors and other senior executives of the Company;

• maintaining appropriate procedures for evaluation of executive performance;

• overseeing succession planning and management development for senior executives in the Group who are not members of the Board;

• reviewing, approving and administering the Company’s executive long-term incentive plans, employee share schemes and other equity-related incentive plans;

• reviewing proposed special incentive awards to senior executives;

• monitoring prohibitions on personal loans to directors and officers;

• determining targets for performance-related pay schemes;

• advising on any major changes in employee benefit structures;

• overseeing the provisions for selecting, appointing and setting the terms of reference for any remuneration consultants to the Company;

• overseeing the preparation of and recommending to the board the approval of the annual report of the Committee in compliance with the disclosure requirements of the Code of Best Practice and the Directors’ Remuneration Report Regulations 2002;

• overseeing the adequacy of disclosures throughout the year regarding director compensation, stock transactions and benefits;

• approving the policy for authorising claims for expenses from directors and senior executives; and

• ensuring that procedures are in place concerning compliance with the employee welfare provisions of the Company’s Code of Business Conduct and Ethics and the Company’s Policy Manual.

Advisors to the Compensation Committee

The Compensation Committee regularly consults with Group executives. In particular, the Committee invites certain individuals to attend meetings, including the Group Chief Executive (who is not present when matters relating to his own compensation or contracts are discussed and decided), the Senior Independent Director (who was formally appointed to the Compensation Committee on 14 December 2017), the Company Secretary, the Chief Talent Officer and the Worldwide Compensation & Benefits Director.

The latter two individuals provide a perspective on information reviewed by the Committee and are a conduit for requests for information and analysis from the Company’s external advisors.

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External advisors

The Committee retains Willis Towers Watson (WTW) to act as independent advisors. They provide advice to the Compensation Committee and work with management on matters related to our compensation policy and practices. They are a member of the Remuneration Consultants Group and have signed the code of conduct relating to the provision of advice in the UK. In light of this, and the level and nature of the service received, the Committee remains satisfied that the advice is objective and independent.

WTW provides limited other services at a Group level. Some of the operating companies engage them as advisors at a local level.

In 2017, WTW received fees of £89,785 in relation to the provision of advice to the Committee. The Committee receives external legal advice, where required, to assist it in carrying out its duties.

Audit Committee

Audit Committee members and attendance during 2017
	Meetings eligible to attend		Meetings attended
Jacques Aigrain (Chairman)		7		7
Sol Trujillo		7		7
Tarek Farahat1		6		5
Charlene Begley2		4		3

¹  Appointed to the Committee on 24 February 2017.

²  Retired from the Board on 7 June 2017.

The Audit Committee held seven meetings during the year, which were attended by Deloitte LLP, the Company’s external auditor, the Company’s Chairman, the Senior Independent Director, the Group Finance Director, the Director of Internal Audit, the Group Chief Counsel, the Group Chief Accountant and the Company Secretary. The Committee also held separate private meetings with the external auditor, the Director of Internal Audit, the Group Chief Counsel and the Group Chief Accountant. In addition to pre-meetings with the external auditors, the Chairman of the Audit Committee also has regular meetings with the Directors of Internal Audit, Tax, Treasury and the Group Chief Counsel and ongoing dialogue with the Group Finance Director and Group Chief Accountant.

Committee responsibilities and how they were discharged in 2017

The discussion below addresses the main matters covered by the Committee’s terms of reference as well as certain additional matters dealt with during 2017:

• Monitoring the integrity of the Company’s financial statements and reviewing significant financial reporting judgements.

• Reviewing internal controls and internal audit activities.

• Assisting the Board in meeting its responsibilities in respect of carrying out a robust assessment of the principal risks affecting the Group and reviewing and reporting on the systems and key elements of risk management as they affect the Group and reviewing the risk map and framework for presentation to the Board.

• Reviewing the Group Treasury policy with particular focus on debtors, funding foreign exchange and cash management and the continued ability of the Group to adopt the going concern basis in preparing financial statements.

• Reviewing reports on any material litigation or regulatory reviews involving Group companies.

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• Reviewing the Group’s mergers and acquisitions strategy, any significant acquisitions, the earnout payments profile review and integration processes and the debt financing by the Group.

• Reviewing the impact of and the Group’s response to the malware attack which affected the Group in June 2017 and the Company’s IT security strategy.

• Reviewing the Group’s tax position.

• Monitoring the accounting and legal reporting requirements, including all relevant regulations of the UK Listing Authority, the SEC and NYSE and the Jersey Financial Services Commission and proposed changes to the UK Corporate Governance Code and future implementation of IFRS 15 and 16.

• Overseeing continued compliance with Section 404 of the Sarbanes-Oxley Act (SOX), through regular status reports submitted by the internal and external auditors.

• Reviewing the Group’s IT Transformation project and shared services initiatives.

• Reviewing issues raised on our Right to Speak helpline and the actions taken in response to those calls.

Fair, balanced and understandable

A Sub-Committee of the Board including members of the Audit Committee examined whether the Annual Report and Accounts for 2017 was fair, balanced and understandable and provided the information necessary for share owners to assess the Group’s position, performance, business model and strategy. The Sub-Committee received an early final draft of the report for review and comment, as well as a report from the Disclosure Committee as to the governance relating to compilation of the report. The Board subsequently considered the report as a whole and discussed the report’s tone, balance and language for compliance with these standards.

Financial reporting and significant financial judgements

The management team make key decisions and judgements in the process of applying the Group’s accounting policies. These key judgements were detailed in reports and presentations by management to the Committee in respect of 2017 which were then examined by the Committee and discussed with management.

The areas of significant judgement considered by the Committee and how these were addressed are set out below:

• The assessments made for goodwill impairment. The Committee confirmed, based on management’s expectations of future performance of certain businesses, the level of goodwill impairment charges required in 2017.

• The judgements made in respect of the timing of recognition and valuation of media volume income earned from media owners and amount to be retained. The Committee received briefings from management on the appropriateness of the controls in place and challenged management to demonstrate the effectiveness of such controls.

• The judgements made in respect of the release of provisions related to other media income. The Committee considered the information from management to support the judgements made and agreed those were appropriate.

• The valuations of non-controlled investments and listed associates, which are based on local management forecasts, recent third-party investment and other supporting information such as industry valuation multiples. The Committee examined the valuations with management and agreed that the valuations were appropriate.

• The accuracy of forecasting the potential future payments due under earnout agreements in respect of acquired businesses. The Committee considered the forecasting with management and agreed that earnouts have been accounted for on a consistent basis to previous periods.

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• The valuation of year-end provisions in respect of working capital. The Committee received briefings on the approach taken by management in assessing the level of exposure across the Group and agreed it was consistent and appropriate.

• Accounting for the judgemental elements of remuneration, including pensions, bonus accruals, severances and share-based payments. The Committee agreed that the assumptions applied by management are reasonable.

• The judgements made in respect of tax, in particular the level of central tax provisioning. The Committee supported management’s assumptions in both these areas and believe the current level of provisions is reasonable.

• The going concern assessment and viability statement and key forecast assumptions. The Committee concur with management’s going concern assumptions as set out in note 24 to the consolidated financial statements.

External audit

Deloitte has been WPP’s auditors since 2002. The lead partner rotates every five years and the latest rotation took effect during 2015. In 2017, the effectiveness of the audit process was evaluated through a Committee review of the audit planning process and discussions with key members of the Group’s finance function. The 2017 evaluations concluded that there continued to be a good quality audit process and constructive challenge where necessary to ensure balanced reporting. The Committee held private meetings with the external auditors and the Committee chair met privately with the external auditors before meetings. The Committee continues to be satisfied with the performance of Deloitte and confirmed that Deloitte continues to be objective and independent. The Committee recommends the reappointment of Deloitte at the AGM on 13 June 2018.

The Committee considered the Group’s position on its audit services contract in the context of the regulations concerning the audit market. Although there is no immediate intention to tender the audit contract, the Company will re-tender at the latest by the 2022 year end in compliance with the transitional arrangements for competitive tender that require mandatory rotation after the 2023 fiscal year-end.

The Company confirms that it has complied with the Competition and Markets Authority final order on mandatory tendering and Audit Committee responsibilities.

Internal audit

The annual internal audit plan is approved by the Committee at the beginning of the financial year. Progress against the plan is monitored through the year and any changes require Committee approval. Significant issues identified within audit reports are considered in detail along with the mitigation plans to resolve those issues. The Committee also considers the level of internal audit resource to ensure it is appropriate to provide the right level of assurance over the principal risks and controls throughout the Group. The Chairman of the Committee hold pre-meetings with the Director of Internal Audit and regular update meetings, to ensure the internal audit function has adequate standing and is free from management restrictions and has direct access to the Audit Committee if needed.

Non-audit fees

The Committee has established a policy regarding non-audit services that may be provided by Deloitte, which prohibits certain categories of work in line with relevant guidance on independence, such as ethical standards issued by the Auditing Practices Board and SEC. The prohibited categories of work include advice on remuneration and on tax services being provided by Deloitte in the EU and a general default to an alternative provider elsewhere subject to adherence to regulations. Other categories of work may be provided by the auditors

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if appropriate and if pre-approved by the Committee, either as individual assignments or as aggregate amounts for specified categories of services. All fees are summarised periodically for the Committee to assess the aggregate value of non-audit fees against audit fees. The level of fees for 2017 is shown in note 3 of the consolidated financial statements.

Committee composition and evaluation

The Committee and its members were formally assessed by the Nomination and Governance Committee as part of the review of Committee composition in 2017 and as part of the evaluation process described below for their technical suitability to be members and also for its overall effectiveness. The Board has designated Jacques Aigrain as the Committee’s financial expert for SOX purposes and together with Tarek Farahat as having recent and relevant financial experience for the purposes of the UK Corporate Governance Code and competence in accounting or audit for the purposes of DTR 7.1. The members of the Committee are considered by the Board to be independent and (when considered as a whole), have competence relevant to the marketing communications sector and have financial and/or financial services experience as set out in their biographies in item 6A.

The annual evaluation of the Board’s and all Committees’ effectiveness has been conducted internally by the Senior Independent Director following the externally-facilitated evaluation concluded in 2016. Each director completed a confidential questionnaire and then held separate conversations with the Senior Independent Director and individual directors considering the effectiveness of the Board and its Committees. The discussions also considered the progress made by the Board and directors in implementing the recommendations of the previous evaluations. The recommendations and agreed actions from this year’s evaluation will be published on the Company’s website prior to the AGM in 2018. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

Terms of reference

The Committee’s terms of reference, are reviewed annually and most recently were reviewed and updated in December 2017 to reflect the FRC’s updated guidance on Audit Committees and can be viewed on the Company’s website at www.wpp.com/wpp/about/howwebehave/governance. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

D. Employees

The assets of communications services businesses are primarily their employees, and the Company is highly dependent on the talent, creative abilities and technical skills of its personnel and the relationships its personnel have with clients. The Company believes that its operating companies have established reputations in the industry that attract talented personnel. However, the Company, like all communications services businesses, is vulnerable to adverse consequences from the loss of key employees due to the competition among these businesses for talented personnel. On 31 December 2017, the Group, including all employees of associated undertakings, had approximately 203,000 employees located in over 3,000 offices in 112 countries compared with 198,000 and 190,000 as at 31 December 2016 and 2015, respectively. Excluding all employees of associated undertakings, this figure is 134,413 (2016: 134,341, 2015: 128,123). The average number of employees in 2017 was 134,428 compared to 132,657 and 124,930 in 2016 and 2015, respectively, including acquisitions.

Their geographical distribution was as follows:

	2017		2016		2015
North America		27,399		27,246		26,224
United Kingdom		14,197		14,070		13,401
Western Continental Europe		25,700		24,996		23,506
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		67,132		66,345		61,799
		134,428		132,657		124,930

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Their operating sector distribution was as follows:

	2017		2016		2015
Advertising and Media Investment Management		56,789		55,120		53,227
Data Investment Management		28,629		29,279		28,395
Public Relations & Public Affairs		9,082		9,054		8,492
Brand Consulting, Health & Wellness and Specialist Communications		39,928		39,204		34,816
		134,428		132,657		124,930

E. Share Ownership

Executive Directors’ interests

Executive Directors’ interests in the Company’s ordinary share capital are shown in the following table. Other than as disclosed in this table, no Executive Director had any interest in any contract of significance with the Group during the year. Each Executive Director has a technical interest as an employee and potential beneficiary in shares in the Company held under the Employee Share Ownership Plan (‘ESOP’). More specifically, the Executive Directors have potential interests in shares related to the outstanding awards under the EPSP and outstanding ESAs. As at 31 December 2017, the Company’s ESOPs (which are entirely independent of the Company and have waived their rights to receive dividends) held in total 14,232,910 shares in the Company (13,857,706 in 2016).

						Outstanding scheme interests
Director		Total share interests (including charitable foundation)		Total beneficial interests		Shares without performance conditions (unvested)1,2		Shares with performance conditions (unvested)3,4		Total unvested shares
Sir Martin Sorrell5	At 31 December 2017		22,515,954		17,940,018		220,772		3,829,864		4,050,636
	At 24 April 2018		23,116,251		17,640,315		86,955		2,797,324		2,884,279
Paul Richardson	At 31 December 2017		1,068,240		1,068,240		100,585		1,046,960		1,147,545
	At 24 April 2018		1,068,240		1,068,240		46,400		786,830		833,230

¹  Shares due pursuant to the 2015 and 2016 Executive Share Awards, full details of which can be found on page 37. Additional dividend shares will be due on vesting.

²  As noted in footnote 1 above, less 2015 Executive Share Awards, which vested on 6 March 2018 (full details can be found on page 37).

³  Maximum number of shares due on vesting pursuant to the outstanding EPSP awards, full details of which can be found on page 38. Additional dividend shares will be due on vesting.

⁴  As noted in footnote 3 above, less the maximum due under the 2013 EPSP Award, which vested on 13 March 2018 (full details can be found on page 37).

⁵  On 27 March 2018, Sir Martin Sorrell gifted 900,000 ordinary shares to the JMCMRJ Sorrell Charitable Foundation. On 24 April 2018, The JMCMRJ Sorrell Charitable Foundation is interested in 5,475,936 ordinary shares. Sir Martin Sorrell has no beneficial interest in these shares.

Share ownership guidelines

The Executive Directors are required to achieve a minimum level of share ownership of WPP shares. The Group Chief Executive and Group Finance Director are required to hold shares to the value of 600% and 300% of base salary respectively.

At the end of 2017, both Executive Directors exceeded their respective share ownership guidelines by a substantial margin.

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Non-Executive Directors’ interests

Non-Executive Directors’ interests in the Company’s ordinary share capital are shown in the following table. Except as disclosed in this table, no Non-Executive Director had any interest in any contract of significance with the Group during the year.

Non-Executive Director	Total interests at 31 December 2017		Total interests at 24 April 2018
Roberto Quarta		37,500		37,500
Jacques Aigrain		13,000		13,000
Charlene Begley1		2,140		2,140
Tarek Farahat		2,100		2,100
Sir John Hood		3,000		3,000
Ruigang Li		4,000		4,000
Daniela Riccardi		4,100		4,100
Nicole Seligman		6,250		6,250
Hugo Shong		22,915		22,915
Timothy Shriver1		10,070		10,070
Sally Susman		5,000		5,000
Sol Trujillo		10,000		10,000

¹  Charlene Begley and Timothy Shriver retired from the Board on 7 June 2017. The information disclosed reflects their total interests at this date.

ITEM 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS

A. Major Shareholders

As of the dates shown below, the Company is aware of the following interests of 3% or more in the issued ordinary share capital:

			24 April 2018				26 April 2017				27 April 2016
MFS	8.03	%		101,727,776	6.64	%		84,917,360	6.6	%		85,122,255
Harris Associates LP	7.35	%		93,117,523	*			*	*			*
BlackRock Inc.	5.49	%		69,509,494	5.62	%		71,872,825	5.1	%		66,364,311

* The Company has not been notified of any interests in the issued ordinary share capital of the Company in excess of 3.0%.

The disclosed interests refer to the respective combined holdings of those entities and to interests associated with them. The Company has not been notified of any other holdings of ordinary share capital of 3% or more. None of these shareholders has voting rights that are different from those of the holders of the Company’s ordinary shares generally. As far as WPP is aware, it is neither directly nor indirectly owned or controlled by one or more corporations or by any government, or by any other natural or legal persons severally or jointly.

The number of outstanding ordinary shares at 31 December 2017 was 1,332,511,552 which included at such date the underlying ordinary shares represented by 14,942,978 ADSs. 222 share owners of record of WPP ordinary shares were US residents at 31 December 2017.

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The geographic distribution of our share ownership as at 31 December 2017 is presented below:

United Kingdom	28%
United States	39%
Rest of world	33%
Total	100%

B. Related Party Transactions

From time to time the Group enters into transactions with its associated undertakings. These transactions were not material for any of the years presented.

See Item 6B for a discussion of the service contracts between the Company and the Executive Directors.

C. Interests of Experts and Counsel

Not applicable.

ITEM 8. FINANCIAL INFORMATION

A. Consolidated Statements and Other Financial Information

See Item 18.

Outstanding legal proceedings

The Company has claims against others and there are claims against the Company in a variety of matters arising from the conduct of its business. In the opinion of the management of the Company, the ultimate liability, if any, that is likely to result from these matters would not have a material impact on the Company’s financial position, or on the results of its operations.

Dividend distribution policy

See Item 10B.

ADS holders are eligible for all stock dividends or other entitlements accruing on the underlying WPP plc shares and receive all cash dividends in US dollars. These are normally paid twice a year. Dividend cheques are mailed directly to the ADS holder on the payment date if ADSs are registered with WPP’s US Depositary, Citibank N.A. Dividends on ADSs that are registered with brokers are sent to the brokers, who forward them to ADS holders.

Dollar amounts paid to ADS holders depend on the sterling/dollar exchange rate at the time of payment.

B. Significant Changes

None.

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ITEM 9. THE OFFER AND LISTING

A. Offer and Listing Details

Share price history

The Company’s ordinary shares have been traded on the London Stock Exchange since 1971.

The following table sets forth, for the periods indicated, the reported high and low middle-market quotations for the Company’s ordinary shares on the London Stock Exchange, based on its Daily Official List.

	£ per Ordinary Share
	High		Low
2013		13.83		9.06
2014		13.83		11.17
2015		16.11		13.04
2016
First Quarter		16.35		13.38
Second Quarter		16.78		14.76
Third Quarter		18.32		16.01
Fourth Quarter		18.50		16.43
2017
First Quarter		19.21		16.46
Second Quarter		17.54		16.14
Third Quarter		16.16		13.48
October		14.08		12.95
November		13.23		12.53
December		13.89		13.05
Fourth Quarter		14.08		12.53
2018
January		13.92		12.78
February		14.71		12.27
March		12.80		10.94
First Quarter		14.71		10.94

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The ordinary shares have traded in the United States since 29 December 1987 in the form of ADSs, which are evidenced by ADRs or held in book entry form. The Depositary for the ADSs is Citibank, N.A. in New York. On 28 November 2017, WPP transferred the listing of its ADSs from the NASDAQ Global Market to the New York Stock Exchange. The following table sets forth, for the periods indicated, the reported high and low sales prices of the ADSs as reported by NASDAQ or NYSE.

	US dollars per ADS
	High		Low
2013		114.86		72.81
2014		113.58		89.95
2015		123.10		99.22
2016
First Quarter		117.25		97.52
Second Quarter		120.46		98.12
Third Quarter		120.34		105.24
Fourth Quarter		117.55		103.00
2017
First Quarter		118.92		102.98
Second Quarter		113.42		104.96
Third Quarter		104.80		90.61
October		93.46		85.20
November		87.94		82.64
December		93.22		88.15
Fourth Quarter		93.46		82.64
2018
January		95.53		88.25
February		102.48		86.03
March		87.83		76.68
First Quarter		102.48		76.68

The Depositary held 74,714,890 ordinary shares as at 31 December 2017, approximately 5.61% of the outstanding ordinary shares, represented by 14,942,978 outstanding ADSs.

B. Plan of Distribution

Not applicable.

C. Markets

See the discussion under “Share price history” in Item 9A.

D. Selling Shareholders

Not applicable.

E. Dilution

Not applicable.

F. Expenses of the Issue

Not applicable.

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ITEM 10. ADDITIONAL INFORMATION

A. Share Capital

Not applicable.

B. Memorandum and Articles of Association

WPP is a public limited company incorporated under the name “WPP plc” in Jersey with registered number 111714.

The following summarises certain provisions of our memorandum and articles of association and applicable Jersey law. This summary is qualified in its entirety by reference to the Jersey Companies Law and our memorandum and articles of association. A copy of our memorandum and articles of association in the form adopted by special resolution passed on 5 November 2012 and including amendments to reflect the change of name of WPP, which became effective on 2 January 2013, is an exhibit to this Form 20-F.

Objects and Purposes

Under the Jersey Companies Law, the capacity of a Jersey company is not limited by anything contained in its memorandum or articles of association. Accordingly, the memorandum of association of a Jersey company does not contain an objects clause.

Rights attaching to WPP ordinary shares

Voting rights of share owners – subject to disenfranchisement in the event of: (A) non-payment of any call or other sum due and payable in respect of any ordinary share; or (B) any non-compliance with any notice requiring disclosure of the beneficial ownership of any ordinary shares and subject to any special rights or restrictions as to voting for the time being attached to any ordinary shares (as to which there are none at present), on a show of hands every qualifying person (i.e. share owner, proxy or authorised corporate representative) present has one vote other than every proxy appointed by more than one member entitled to vote on the resolution who has two votes, one vote for and one against the resolution if: (i) one or more of the members instructed him to vote for and one or more of the members instructed him to vote against the resolution; or (ii) one or more of the members instructed him to vote for the resolution and one or more of the members gave him discretion as to how to vote and he exercises his discretion by voting against the resolution; or (iii) one or more of the members instructed him to vote against the resolution and one or more of the members gave him discretion as to how to vote and he exercises his discretion by voting for the resolution, and on a poll every share owner present in person or by proxy has one vote for every ordinary share of which he or she is a holder, except that any proxy who has been appointed by the Depositary shall have such number of votes as equals the number of ordinary shares in relation to which such proxy has been appointed. In the case of joint holders, the vote of the person whose name stands first in the register of members and who tenders a vote is accepted to the exclusion of any votes tendered by any other joint holders.

Return of capital on a winding up – the liquidator may, with the sanction of a special resolution of WPP and any other sanction required by the Statutes: (A) divide among the WPP share owners in specie the whole or any part of the assets of WPP; or (B) vest the whole or any part of the assets in trustees on such trusts for the benefit of share owners as the liquidator shall think fit, but no share owner shall be compelled to accept any assets upon which there is any liability. The “Statutes” means the Jersey Companies Law and every other statute, statutory instrument, regulation or order, for the time being in force, concerning companies registered under the Jersey Companies Law, including the Electronic Communication (Jersey) Law 2000 and the Companies (Uncertificated Securities) (Jersey) Order 1999 (as amended).

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Capitalisation of reserves

The board of directors may, with the authority of an ordinary resolution of WPP: (A) resolve to capitalise any sum standing to the credit of any reserve account of WPP (including share premium account and capital redemption reserve) or any sum standing to the credit of profit and loss account not required for the payment of any preferential dividend (whether or not it is available for distribution); and (B) appropriate that sum as capital to the share owners in proportion to the nominal amount of the ordinary shares held by them respectively and apply that sum on their behalf in paying up in full any unissued ordinary shares or debentures of WPP of a nominal amount equal to that sum and allot the ordinary shares or debentures credited as fully paid to those share owners, or as they may direct, in those proportions or in paying up the whole or part of any amounts that are unpaid in respect of any issued ordinary shares held by them respectively, or otherwise deal with such sum as directed by the resolution, provided that the share premium account and the capital redemption reserve and any sum not available for distribution in accordance with the Statutes may only be applied in paying up unissued ordinary shares to be allotted credited as fully paid up.

Transfer of ordinary shares

Subject to any restrictions in the articles of association, a share owner may transfer all or any of his ordinary shares in any manner that is permitted by the Statutes and is from time to time approved by the board of directors. WPP shall register the transfer of any ordinary shares held in uncertificated form by means of a relevant system in accordance with the Statutes. The board of directors may, in its absolute discretion, refuse to register any transfer of an uncertificated share where permitted by articles of association and the Statutes.

A share owner may transfer all or any of his certificated ordinary shares by an instrument of transfer in any usual form, or in such other form as the board of directors may approve. The instrument of transfer shall be signed by or on behalf of the transferor and, except in the case of a fully paid share, by or on behalf of the transferee. The board of directors may, in its absolute discretion, refuse to register any transfer of any certificated ordinary share that is not fully paid up (but not so as to prevent dealings in ordinary shares admitted to official listing by the United Kingdom Listing Authority (UKLA) from taking place on an open and proper basis) or on which WPP has a lien. The board of directors may also refuse to register any instrument of transfer of a certificated ordinary share unless it is lodged at the registered office, or such other place as the board of directors may decide, for registration, accompanied by the share certificate for the ordinary shares to be transferred and such other evidence as the board of directors may reasonably require to prove title of the intending transferor or his right to transfer the ordinary shares and it is in respect of only one class of WPP shares. If the board of directors refuses to register a transfer of a certificated ordinary share it shall, as soon as practicable and in any event within two months after the date on which the instrument of transfer was lodged or the operator-instruction was received, give to the transferee notice of the refusal. The board of directors must provide the transferee with such further information about the reasons for the refusal as the transferee may reasonably request. Unless otherwise agreed by the board of directors in any particular case, the maximum number of persons who may be entered on the register as joint holders of an ordinary share is four.

Changes in capital

Subject to the provisions of the Jersey Companies Law, WPP may by special resolution:

• increase its share capital;

• consolidate and divide all or any of its share capital into ordinary shares of a larger amount;

• sub-divide all or part of its share capital into ordinary shares of a smaller amount;

• cancel any ordinary shares that have not, at the date of the special resolution, been taken or agreed to be taken by any person and diminish the amount of its authorised share capital by the amount of the ordinary shares so cancelled; or

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• alter its share capital in any other manner permitted by the Jersey Companies Law.

Subject to the provisions of the Jersey Companies Law, WPP may:

• purchase ordinary shares, including any redeemable ordinary shares; and

• by special resolution, reduce its share capital and any capital redemption reserve or share premium account.

Authority to allot securities and disapplication of pre-emption rights

WPP may from time to time pass an ordinary resolution authorising the board of directors to exercise all the powers of WPP to allot relevant securities up to the nominal amount specified in the resolution. The authority shall expire on the day specified in the resolution, not being more than five years after the date on which the resolution is passed. The term “relevant securities” means shares in WPP other than subscriber shares, or shares allotted pursuant to an employee share scheme, and any right to subscribe for or to convert any security into, shares in WPP. For the avoidance of doubt, any reference to the allotment of relevant securities includes the grant of such a right but not the allotment of shares pursuant to such a right.

On the passing of a special resolution, the board of directors shall have power to allot equity securities wholly for cash but that power shall be limited: (A) to the allotment of equity securities in connection with a rights issue; and (B) to the allotment (other than in connection with a rights issue) of equity securities having a nominal amount not exceeding in aggregate the sum specified in the special resolution.

Variation of rights

Whenever the share capital of WPP is divided into different classes of shares (which it is not as at the date of this document), all or any of the rights for the time being attached to any class of shares in issue may, subject to the Statutes, be varied, either in such manner as those rights may provide or with the consent in writing of the holders of two-thirds in nominal value of the issued ordinary shares of that class or with the sanction of a special resolution passed at a separate general meeting of the holders of those ordinary shares. At any separate general meeting, the necessary quorum is two persons holding or representing by proxy at least one-third in nominal amount of the issued ordinary shares of the class in question (but at any adjourned meeting, one person holding ordinary shares of the class or his proxy is a quorum).

Disclosure of interests in WPP’s shares

WPP may give a disclosure notice to any person whom it believes is either:

• interested in the WPP’s shares; or

• has been so interested at any time during the three years on which the disclosure notice is issued.

The disclosure notice may require the person:

• to confirm that fact or (as the case may be) to state whether or not it is the case; and

• if he holds, or has during that time held, any such interest, to give such further information as may be required.

The notice may require the person to whom it is addressed, where either:

• his interest is a present interest and another interest in the shares subsists; or

• another interest in the shares subsisted during that three year period at a time when his interest subsisted, to give, so far as lies within his knowledge, such particulars with respect to that other interest as may be required by the notice including:

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• the identity of persons interested in the shares in question; and

• whether persons interested in the same shares are or were parties to either an agreement to acquire interests in a particular company, or an agreement or arrangement relating to the exercise of any rights conferred by the holding of the shares.

The notice may require the person to whom it is addressed, where his interest is a past interest, to give (so far as lies within his knowledge) particulars of the identity of the person who held that interest immediately upon his ceasing to hold it.

Failure to provide the information within 14 days after the notice has been given means that the holder of the relevant shares shall not be entitled to vote either personally or by proxy at a shareholders’ meeting or to exercise any other right confirmed by membership in relation to shareholder meetings for so long as the default continues (and, if those shares represent at least 0.25 percent of the issued shares of the class, the holder shall not be entitled to receive any payment by way of dividend or to transfer any rights in the shares).

Register of members

The register of members of WPP must be kept and maintained in Jersey.

Uncertificated shares – general powers

Subject to the Jersey Companies Law and the Companies Uncertificated Securities (Jersey) Order 1999 (as amended), the board of directors may permit any class of ordinary shares to be held in uncertificated form and to be transferred by means of a relevant system and may revoke such permission. In relation to any uncertificated share, WPP may utilise the relevant system in which it is held to the fullest extent available from time to time in the exercise of any of its powers or functions under the Statutes or the articles of association or otherwise in effecting any actions. Any provision in the articles of association in relation to uncertificated shares that is inconsistent with any applicable statutory provision shall not apply. WPP may, by notice to the holder of an uncertificated share, require the holder to change the form of that share to certificated form within such period as may be specified in the notice. For the purpose of effecting any action by WPP, the board of directors may determine that holdings of the same share owner in uncertificated form and in certificated form shall be treated as separate holdings but shares of a class held by a person in uncertificated form shall not be treated as a separate class from shares of that class held by that person in certificated form.

Directors

The WPP directors (other than alternate directors) shall not, unless otherwise determined by an ordinary resolution of WPP, be fewer than six in number.

A director need not be a share owner.

At each annual general meeting every director who held office on the date seven days before the date of the notice of annual general meeting shall retire from office, but shall be eligible for re-election.

The directors shall be paid fees not exceeding in aggregate £3,000,000 per annum (or such larger sum as WPP may, by ordinary resolution, determine) as the board of directors may decide to be divided among them. Such fee shall be divided among them in such proportion and manner as they may agree or, failing agreement, equally.

The board of directors may grant special remuneration to any director who performs any special or extra services to, or at the request of, WPP. Special remuneration may be payable to a director in addition to his ordinary remuneration (if any) as a director.

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The directors shall also be paid out of the funds of WPP all expenses properly incurred by them in and about the discharge of their duties, including their expenses of travelling to and from the meetings of the board of directors, Committee meetings and general meetings.

The board of directors may exercise all the powers of WPP to: (i) pay, provide, arrange or procure the grant of pensions or other retirement benefits, death, disability or sickness benefits, health, accident and other insurances or other such benefits, allowances, gratuities or insurances, including in relation to the termination of employment, to or for the benefit of any person who is or has been at any time a director of WPP or in the employment or service of WPP or of any body corporate that is or was associated with WPP or of the predecessors in business of WPP or any such associated body corporate, or the relatives or dependants of any such person. For that purpose, the board of directors may procure the establishment and maintenance of, or participation in, or contribution to, any pension fund, scheme or arrangement and the payments of any insurance premiums; (ii) establish, maintain, adopt and enable participation in any profit sharing or incentive scheme including shares, share options or cash or any similar schemes for the benefit of any director or employee of WPP or of any associated body corporate, and, subject to any restrictions under applicable legislation, to lend money to any such director or employee or to trustees on their behalf to enable any such schemes to be established, maintained or adopted; and (iii) support and subscribe to any institution or association that may be for the benefit of WPP or of any associated body corporate or any directors or employees of WPP or associated body corporate or their relatives or dependants or connected with any town or place where WPP or an associated body corporate carries on business, and to support and subscribe to any charitable or public object whatsoever.

Subject to any applicable statutory provisions and to declaring his interests in accordance with the articles of association, a director may enter into or be interested in any transaction or arrangement with WPP, either with regard to his tenure of any office or position in the management, administration or conduct of the business of WPP, or as vendor, purchaser or otherwise. A director may hold and be remunerated in respect of any other office or place of profit with WPP (other than the office of auditor of WPP) in conjunction with his office as a director and he (or his firm) may also act in a professional capacity for WPP (except as auditor) and may be remunerated for it.

A director who, to his knowledge, is in any way, whether directly or indirectly, interested in a transaction or arrangement or a proposed transaction or arrangement with WPP or any of its subsidiaries, or if any situation exists in which a director has or can have a direct or indirect interest that conflicts with or may conflict with the interests of WPP, shall disclose to WPP the nature and extent of the interest or situation in accordance with the articles of association.

A director shall not vote or be counted in the quorum at a meeting in respect of any resolution concerning his own appointment (including fixing and varying its terms), or the termination of his own appointment, as the holder of any office or place of profit with WPP or any other company in which WPP is interested but, where proposals are under consideration concerning the appointment (including fixing or varying its terms), or the termination of the appointment, of two or more directors to offices or places of profit with WPP or any company in which WPP is interested, those proposals may be divided and considered in relation to each director separately, and in such case each of the directors concerned (if not otherwise debarred from voting under the articles of association) shall be entitled to vote and be counted in the quorum in respect of each resolution except that concerning his own appointment or the termination of his own appointment.

A director shall not vote (or be counted in the quorum at a meeting) in respect of any transaction or arrangement or other proposal in which he has an interest that (together with any interest of a connected person) is to his knowledge a direct or indirect interest and as may reasonably be required as likely to give rise to a conflict. Notwithstanding the above, a director shall be entitled to vote (and be counted in the quorum) on: (A) any transaction or arrangement in which he is interested by virtue of an interest in ordinary shares, debentures or other securities of WPP or otherwise in or through WPP; (B) the giving of any guarantee, security or indemnity in respect of money lent or obligations incurred by him or by any other person at the request of, or for the benefit

56

of, WPP or any of its subsidiaries; or a debt or obligation of WPP or any of its subsidiaries for which he himself has assumed responsibility under a guarantee or indemnity or by the giving of security; (C) (subject to the Statutes) indemnification (including loans made in connection with it) by WPP in relation to the performance of his duties on behalf of WPP or any of its subsidiaries; (D) any issue or offer of ordinary shares, debentures or other securities of WPP or any of its subsidiaries in respect of which he is or may be entitled to participate in his capacity as holder of any such securities or as an underwriter or sub-underwriter; (E) any transaction or arrangement concerning another company in which he and any connected person do not to his knowledge hold, directly or indirectly as shareholders, or through their direct or indirect holdings of financial instruments (within the meaning of Chapter 5 of the Disclosure and Transparency Rules) voting rights representing one percent or more of any class of shares in the capital of such company; (F) any arrangement for the benefit of employees of WPP or any of its subsidiaries that does not accord to him any privilege or benefit not generally accorded to the employees to whom the arrangement relates; and (G) the purchase or maintenance of insurance for the benefit of the directors or for the benefit of persons including the directors. “Disclosure and Transparency Rules” means the rules and regulations made by the Financial Services Authority in its capacity as the UK Listing Authority under Part VI of the UK Financial Services and Markets Act of 2000, as amended, and contained in the UK Listing Authority’s publication of the same name.

WPP shall not make a payment for loss of office to a director unless the payment has been approved by an ordinary resolution of WPP.

General meetings

The board of directors shall convene, and WPP shall hold, an annual general meeting in accordance with the Statutes. Other general meetings shall be held whenever the board of directors thinks fit or on the requisition of WPP share owners in accordance with the Statutes or the articles of association.

An annual general meeting shall be called by not less than 21 days’ written notice and any other general meeting shall be called by not less than 14 clear days’ written notice.

The requisite quorum for general meetings of WPP shall be two qualifying persons, entitled to vote on the business to be transacted at the meeting.

Borrowing powers

The board of directors may exercise all the powers of WPP to borrow money and to mortgage or charge all or any part of its undertaking, property and assets (both present and future) and uncalled capital and to issue debentures and other securities, whether outright or as collateral security for any debt, liability or obligations of WPP or of any third party. The board of directors shall restrict the borrowings of WPP and exercise all voting and other rights or powers of control exercisable by WPP in relation to its subsidiaries (if any) so as to secure (as regards subsidiaries only so far as by such exercise it can secure) that the aggregate principal amount outstanding at any time in respect of all borrowings by the WPP Group (exclusive of any borrowings that are owed by one WPP Group company to another WPP Group company) after deducting the amount of cash deposited will not, without the previous sanction of WPP in general meeting, exceed an amount equal to 2.5 times the adjusted capital and reserves (as defined in the articles of association) or any higher limit fixed by ordinary resolution of WPP that is applicable at the relevant time. “WPP Group” means WPP and its subsidiaries and subsidiary undertakings and, where the context requires, its associated undertakings.

To date, no resolution of the type referred to in the paragraph above has been passed.

Dividends

Declaration of dividends – subject to the provisions of the Jersey Companies Law, WPP may, by ordinary resolution, declare a dividend to be paid to the share owners, according to their respective rights and interests in

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the profits, and may fix the time for payment of such dividend, but no dividend shall exceed the amount recommended by the board of directors.

Fixed and interim dividends – subject to the provisions of the Jersey Companies Law, the board of directors may pay such interim dividends as appear to the board of directors to be justified by the financial position of WPP and may also pay any dividend payable at a fixed rate at intervals settled by the board of directors whenever the financial position of WPP, in the opinion of the board of directors, justifies its payment. If the board of directors acts in good faith, none of the directors shall incur any liability to the share owners conferring preferred rights for any loss such share owners may suffer in consequence of the lawful payment of an interim dividend on any shares having non-preferred or deferred rights.

Calculation and currency of dividends – except insofar as the rights attaching to, or the terms of issue of, any shares otherwise provide: (A) all dividends shall be declared and paid according to the amounts paid up on the shares in respect of which the dividend is paid, but no amount paid up on a share in advance of calls shall be treated as paid up on the share; (B) all dividends shall be apportioned and paid pro rata according to the amounts paid up on the shares during any portion or portions of the period in respect of which the dividend is paid; (C) any amount paid by WPP by way of dividend will be deemed to include any amount that WPP may be compelled by law to withhold or deduct; and (D) dividends may be declared or paid in any currency. The board of directors may agree with any share owner that dividends that may at any time or from time to time be declared or become due on his or her ordinary shares in one currency shall be paid or satisfied in another, and may agree the basis of conversion to be applied and how and when the amount to be paid in the other currency shall be calculated and paid and for WPP or any other person to bear any costs involved.

Dividends not to bear interest – no dividend or other moneys payable by WPP on or in respect of any share shall bear interest as against WPP unless otherwise provided by the rights attached to the share.

Calls or debts or amounts required by law may be deducted from dividends – the board of directors may deduct from any dividend or other moneys payable to any person (either alone or jointly with another) on or in respect of a share all such sums as may be due from him (either alone or jointly with another) to WPP on account of calls or otherwise in relation to shares.

Dividends in specie – with the authority of an ordinary resolution of WPP and on the recommendation of the board of directors, payment of any dividend may be satisfied wholly or in part by the distribution of specific assets and in particular of paid up ordinary shares or debentures of any other company.

Scrip dividends – the board of directors may, with the authority of an ordinary resolution of WPP, offer any share owners the right to elect to receive further ordinary shares (whether or not of that class) credited as fully paid, by way of scrip dividend instead of cash in respect of all (or some part) of any dividend specified by the ordinary resolution.

Unclaimed dividends – any dividend unclaimed for a period of 12 years after having become due for payment shall be forfeited and cease to remain owing by WPP.

Forfeiture of shares

If the whole or any part of any call or installment remains unpaid on any share after the due date for payment, the board of directors may serve a written notice on the share owner requiring him to pay so much of the call or installment as remains unpaid, together with any accrued interest.

The written notice shall state a further day, being not less than 14 clear days from the date of the notice, on or before which, and the place where, payment is to be made and shall state that, in the event of non-payment on or before the day and at the place appointed, the share in respect of which the call was made or installment is payable will be liable to be forfeited.

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If the requirements of a notice are not complied with, any share in respect of which it was given may (before the payment required by the notice is made) be forfeited by a resolution of the board of directors. The forfeiture shall include all dividends declared and other moneys payable in respect of the forfeited share and not actually paid before the forfeiture.

Every share that is forfeited or surrendered shall become the property of WPP and (subject to the Statutes) may be sold, re-allotted or otherwise disposed of, upon such terms and in such manner as the board of directors shall decide either to the person who was before the forfeiture the share owner or to any other person and whether with or without all or any part of the amount previously paid up on the share being credited as so paid up.

Website communication with share owners

The articles of association enable WPP to use its website as a means of sending or supplying documents or information to share owners. Before communicating with a share owner by means of its website, WPP must have asked the share owner, individually, to agree (generally or specifically) that WPP may send or supply documents or information to him by means of a website. A member shall be deemed to have agreed that WPP may send or supply a document or information by means of a website if no response to the request is received within 28 days. When communicating with share owners by means of website communications, WPP will notify the share owners (by post or other permitted means) of the presence of a document or information on the website.

Directors’ indemnity, insurance and defence

As far as the legislation allows, WPP may:

(i) indemnify any director (or of an associated body corporate) against any liability;

(ii) indemnify a director of a company that is a trustee of an occupational pension scheme for employees (or former employees) of WPP (or of an associated body corporate) against liability incurred in connection with WPP’s activities as trustee of the scheme;

(iii) purchase and maintain insurance against any liability for any director referred to in paragraph (i) or (ii) above; and

(iv) provide any director referred to in paragraph (i) or (ii) above with funds (whether by loan or otherwise) to meet expenditure incurred or to be incurred by him in defending any criminal, regulatory or civil proceedings or in connection with an application for relief (or to enable any such director to avoid incurring such expenditure).

Takeover Bids

The City Code on Takeovers and Mergers (the “City Code”) applies to WPP. Under the City Code, if an acquisition of ordinary shares were to increase the aggregate holding of an acquirer and its concert parties to ordinary shares carrying 30% or more of the voting rights in WPP, the acquirer (and, depending upon the circumstances, its concert parties) would be required, except with the consent of the Panel on Takeovers and Mergers (an independent body in the United Kingdom), to make a cash offer for the outstanding ordinary shares at a price not less than the highest price paid for the ordinary shares by the acquirer or its concert parties during the previous 12 months. A similar obligation to make such a mandatory offer would also arise on the acquisition of ordinary shares by a person holding (together with its concert parties) ordinary shares carrying between 30% and 50% of the voting rights in WPP if the effect of such acquisition were to increase that person’s percentage of the voting rights they hold in ordinary shares.

The Jersey Companies Law provides that where a person (the “Offeror”) makes a takeover offer to acquire all of the shares (or all of the shares of any class) in a Jersey company (other than any shares already held by the Offeror at the date of the offer), if the Offeror has by virtue of acceptances of the offer acquired or contracted to acquire not less than 90% in nominal value of the shares (or class of shares) to which the offer relates, the

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Offeror may (subject to the requirements of the Jersey Companies Law), by notice to the holders of the shares (or class of shares) to which the offer relates which the Offeror has not already acquired or contracted to acquire, compulsorily acquire those shares. A holder of any shares who receives a notice of compulsory acquisition may, within six weeks from the date on which such notice was given apply to the Royal Court of Jersey (the “Jersey Court”) for an order that the Offeror not be entitled and bound to purchase the holder’s shares or that the Offeror purchase the holder’s shares on terms different to those of the Offeror’s offer.

Where before the end of the period within which the takeover offer can be accepted, the Offeror has by virtue of acceptances of the offer acquired or contracted to acquire not less than 90% in nominal value of all of the shares (or all of the shares of a particular class) of the Jersey company, the holder of any shares (or class of shares) to which the offer relates who has not accepted the offer may, by written notice to the Offeror, require the Offeror to acquire the holder’s shares. The Offeror shall (subject to the requirements of the Jersey Companies Law) be entitled and bound to acquire the holder’s shares on the terms of the offer or on such other terms as may be agreed. Where a holder gives the Offeror a notice of compulsory acquisition, each of the Offeror and the holder of the shares is entitled to apply to the Jersey Court for an order that the terms on which the Offeror is entitled and bound to acquire the holder’s shares shall be such as the Jersey Court thinks fit.

C. Material Contracts

The following is a summary of each contract (not being a contract entered into in the ordinary course of business) that has been entered into by any member of the WPP Group: (a) within the two years immediately preceding the date of this Form 20-F which are, or may be, material to the WPP Group; or (b) at any time which contain obligations or entitlements which are, or may be, material to the WPP Group as at the date of this Form 20-F:

(i) On 6 November 2007, WPP Finance S.A. issued £200,000,000 6.375% guaranteed bonds due 2020. The bonds are guaranteed by WPP 2005 Limited and WPP 2008 Limited and were constituted respectively by two Trust Deeds dated 6 November 2007 between Citicorp Trustee Company Limited, the guarantors and WPP Finance S.A. The bonds are listed on the London Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and events of default provisions (including a cross-default provision). The Trust Deeds also contain indemnities by WPP Finance S.A. in favour of Citicorp Trustee Company Limited. Pursuant to a supplemental trust deed dated 14 November 2008, WPP 2012 Limited (formerly known as WPP plc), WPP Air 1 and WPP Air 3 acceded as additional guarantors to the bonds. In a supplemental trust deed dated 14 December 2012, arrangements were made for WPP plc and WPP Jubilee Limited to accede as additional guarantors subject to the court approval of the scheme of arrangement referred to in Item 4.A above;

(ii) On 21 November 2011, WPP Finance 2010 issued US$500,000,000 of 4.75% guaranteed senior notes due November 2021. On 2 December 2011, WPP Finance 2010 issued an additional $312,387,000 of 4.75% guaranteed senior notes due November 2021 in exchange for $281,369,000 of outstanding 5.875% Senior Notes due 2014 of WPP Finance (UK). In total, WPP Finance 2010 issued US$812,387,000 of the 4.75% guaranteed senior notes due November 2021 pursuant to the Indenture and the First Supplemental Indenture, both dated as at 2 November 2011, among WPP Finance 2010 as Issuer, WPP plc, WPP Air 1, WPP 2008 Limited and WPP 2005 Limited as Guarantors, and Wilmington Trust National Association as Trustee, Citibank, N.A., as Security Registrar and Principal Paying Agent and Citibank N.A., London Branch as Paying Agent. The indenture contains events of default provisions (including a cross-default provision). It also contains a restriction on the Issuer or any of the Guarantors referred to above consolidating or merging with any other person and conveying, transferring or leasing all or substantially all of their properties and assets to any person except where the entity resulting from such consolidation or merger or to whom such properties and assets are transferred becomes a primary obligor of the notes and gives certain certificates and indemnities. The covenants of the Indenture also contain a negative pledge and a limitation on the sale and leaseback of any assets by the Guarantors referred to above and their principal subsidiaries. The Indenture allows for

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defeasance of these covenants subject to certain conditions. The holders of the notes have the right to require the Issuer to repurchase the notes at a price equal to 101% of the principal amount of the notes in the event that there is a Change of Control of WPP plc and the notes lose their investment grade rating. The Indenture also contains a joint and several indemnity from the Issuer and the Guarantors referred to above in favour of the Trustee. In the Fourth Supplemental Indenture dated 14 December 2012, arrangements were made for WPP plc and WPP Jubilee Limited to accede as additional guarantors subject to the court approval of the scheme of arrangement referred to in Item 4.A above;

(iii) On 18 July 2014, WPP CP LLC and WPP Finance Co. Limited (as borrowers), guaranteed by WPP plc, WPP 2005 Limited, WPP Jubilee Limited and WPP CP LLC entered into an agreement for a seven-year multi-currency revolving credit facility (with a US Dollar swingline option) for US$2.5 billion with a syndicate of banks and Citibank International plc as facility agent due July 2021. The facility is available for drawing by way of multi-currency cash advances on a revolving basis, with an option to draw US Dollar swingline advances up to a sub-limit of US$1.1 billion. The rate of margin for the facility is, if the long-term unsecured and non-credit enhanced debt rating of WPP published by Moody’s and Standard & Poor’s (the Credit Rating) is A-/A3 or higher, 0.275% per annum. If the Credit Rating is BBB+ or Baa1, the rate of margin for the facility shall be 0.35% per annum. If the Credit Rating is BBB or Baa2, the rate of margin for the facility is 0.45% per annum. If the Credit Rating is BBB- or Baa3, the rate of margin for the facility is 0.60% per annum. If the Credit Rating is BB+ or Ba1 or lower, the rate of margin for the facility is 0.9% per annum. If Moody’s and Standard & Poor’s assign different Credit Ratings, the margin shall be the average of the margins determined by each of Moody’s and Standard & Poor’s. The commitment fee payable on undrawn commitments is equal to 35% of the then applicable margin. A utilisation fee of 0.1% per annum is payable on outstandings on any day on which the amount of outstandings exceed 0% of the total facility commitments but is less than or equal to 33% of the total facility commitments. A utilisation fee of 0.20% per annum is payable on outstandings on any day on which the amount of outstandings exceed 33% of the total facility commitments but is less than or equal to 66% of the total facility commitments. A utilisation fee of 0.40% per annum is payable on outstandings on any day on which the amount of outstandings exceed 66% of the total facility commitments. The facility agreement contains customary representations, covenants and events of default. The interest rate for swingline advances is the higher of the US prime commercial lending rate and 0.50% per annum above the federal funds rate;

(iv) On 7 September 2012, WPP Finance 2010 issued US$500,000,000 3.625% guaranteed senior notes due September 2022 and $300,000,000 5.125% guaranteed senior notes due 2042. These notes were issued under the Indenture dated as at 2 November 2011, described above, as supplemented by the Second Supplemental Indenture and the Third Supplemental Indenture, respectively, each dated as at 7 September 2012, among WPP Finance 2010 as issuer, WPP 2012 Limited (formerly known as WPP plc), WPP Air 1, WPP 2008 Limited and WPP 2005 Limited as guarantors, Wilmington Trust, National Association as trustee, Citibank, N.A., as security registrar and Principal Paying Agent and Citibank, N.A., London Branch as Paying Agent. The indenture contains events of default provisions (including a cross-default provision). It also contains a restriction on the Issuer or any of the Guarantors referred to above consolidating or merging with any other person and conveying, transferring or leasing all or substantially all of their properties and assets to any person except where the entity resulting from such consolidation or merger or to whom such properties and assets are transferred becomes a primary obligor of the notes and gives certain certificates and indemnities. The covenants of the Indenture also contain a negative pledge and a limitation on the sale and leaseback of any assets by the Guarantors referred to above and their principal subsidiaries. The Indenture allows for defeasance of these covenants subject to certain conditions. The holders of the notes have the right to require the Issuer to repurchase the notes at a price equal to 101% of the principal amount of the notes in the event that there is a Change of Control of WPP plc and the notes lose their investment grade rating. The Indenture also contains a joint and several indemnity from the Issuer and the Guarantors referred to above in favour of the Trustee;

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(v) On 2 January 2013, WPP plc entered into a deposit agreement with Citibank, N.A., as US Depositary, and the holders and beneficial owners of ADSs that sets out the terms on which the US Depositary has agreed to act as depositary with respect to WPP ADSs. The deposit agreement contains, amongst other things, customary provisions pertaining to the form of ADRs, the deposit and withdrawal of ordinary shares, distributions to holders of ADSs, voting of ordinary shares underlying ADSs, obligations of the US Depositary and WPP plc, charges of the US Depositary, and compliance with U.S. securities laws;

(vi) On 12 November 2013, WPP Finance 2010 issued US$500,000,000 5.625% guaranteed senior notes due November 2043. These notes were issued under the Indenture dated as at 12 November 2013, as supplemented by the Supplemental Indenture dated as at 12 November 2013, among WPP Finance 2010 as issuer, WPP plc, WPP Jubilee Limited, and WPP 2005 Limited as guarantors, Wilmington Trust, National Association as trustee, Citibank, N.A., as security registrar and Principal Paying Agent and Citibank, N.A., London Branch as Paying Agent. Aside from the coupon and repayment date, the terms and conditions of these notes are the same as those for the $812,387,000 4.75% notes due November 2021 described above;

(vii) On 20 November 2013, WPP Finance 2013 issued EUR 750,000,000 3.000% guaranteed senior bonds due November 2023. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 11 November 2013 between WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 December 2013 between WPP Finance 2013, the guarantors, and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(viii) On 19 September 2014, WPP Finance 2010 issued US$ 750,000,000 3.750% guaranteed senior notes due September 2024. These notes were issued under the Indenture dated as at 19 September 2014, as supplemented by the Supplemental Indenture dated as at 19 September 2014, among WPP Finance 2010 as issuer, WPP plc, WPP Jubilee Limited, and WPP 2005 Limited as guarantors, Wilmington Trust, National Association as trustee, Citibank, N.A., as security registrar and Principal Paying Agent and Citibank, N.A., London Branch as Paying Agent. Aside from the coupon and repayment date, the terms and conditions of these notes are the same as those for the $500,000,000 5.625% notes due November 2043 described above;

(ix) On 22 September 2014, WPP Finance S.A. issued EUR 750,000,000 2.250% guaranteed senior bonds due September 2026. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 11 November 2013 between WPP Finance S.A., the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 November 2013 between WPP Finance S.A., the guarantors, and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(x) On 23 March 2015, WPP Finance Deutschland GmbH issued EUR 600,000,000 1.625% guaranteed senior bonds due March 2030. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 11 November 2013 as supplemented by a First Supplemental Trust Deed dated 14 November 2014 between, inter alia, WPP Finance Deutschland GmbH, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 November 2013 between, inter alia, WPP Finance Deutschland GmbH, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and

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conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(xi) On 23 March 2015, WPP Finance 2013 issued EUR 251,910,000 0.43% guaranteed senior bonds due March 2018. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 11 November 2013 as supplemented by a First Supplemental Trust Deed dated 14 November 2014 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 November 2013 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(xii) On 18 November 2015, WPP Finance 2013 issued EUR 600,000,000 0.75% guaranteed senior bonds due November 2019. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 11 November 2013 as supplemented by a First Supplemental Trust Deed dated 14 November 2014 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 November 2013 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(xiii) On 17 March 2016, STW Communications Group Limited (subsequently renamed WPP AUNZ Limited) entered into an agreement for a 3 year revolving credit facility for AUD$520 million with a syndicate of banks and Westpac Banking Corporation acting as Agent due 5 April 2019. Joint and several guarantees are provided by subsidiaries of WPP AUNZ that represent at least 80% of EBITDA and at least 70% of total tangible assets. The facility is available for drawing by way of cash advances in Australian Dollars or New Zealand Dollars on a revolving basis. The rate of margin is determined by the ratio of Net Debt to EBITDA. If the ratio is greater than 2.5 the rate of margin for the facility shall be 1.8%. If the ratio is greater than 2.0 and less than or equal to 2.5 the rate of margin for the facility shall be 1.5%. If the ratio is greater than 1.5 and less than or equal to 2.0 the rate of margin for the facility shall be 1.35%. If the ratio is greater than 1.0 and less than or equal to 1.5 the rate of margin for the facility shall be 1.2%. If the ratio is less than or equal to 1.0 the rate of margin for the facility shall be 1.05%. The commitment fee payable on undrawn commitments is equal to 45% of the then applicable margin. The facility contains customary representations, covenants and events of default;

(xiv) On 14 September 2016, WPP Finance 2013 issued GBP 400,000,000 2.875% fixed rate guaranteed senior bonds due 14 September 2046 under the EUR 4,000,000,000 Euro Medium Term Note Programme. The bonds are guaranteed by WPP plc, WPP 2005 Limited and WPP Jubilee Limited, and are constituted by a Trust Deed dated 14 November 2014 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 11 November 2013 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are admitted to the Official List of the Irish Stock Exchange and to trading on the Global Exchange Market. The terms and conditions of the bonds contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and a cross-default event of default provision;

(xv) On 18 May 2017, WPP Finance 2013 issued EUR 250,000,000 guaranteed senior bonds due May 2020 which pay a coupon of 3 month EURIBOR + 0.32%. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 8 November

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2016 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 8 November 2016 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision;

(xvi) On 20 March 2018, WPP Finance 2013 issued EUR 250,000,000 guaranteed senior bonds due March 2022 which pay a coupon of 3 month EURIBOR + 0.45%. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 8 November 2016 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 8 November 2016 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision; and

(xvii) On 20 March 2018, WPP Finance 2016 issued EUR 500,000,000 1.375% guaranteed senior bonds due March 2025. The bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited, and were constituted by a Trust Deed dated 8 November 2016 between, inter alia, WPP Finance 2013, the guarantors, and Citicorp Trustee Company Limited. The administration of payments to bondholders is provided for in an Agency Agreement dated 8 November 2016 between, inter alia, WPP Finance 2013, the guarantors and Citibank, N.A., London Branch. The bonds are listed on the Global Exchange Market of the Irish Stock Exchange and the terms and conditions contain a redemption provision at the option of the bondholders on a Change of Control, a negative pledge provision and the events of default provisions in the terms and conditions contain a cross-default provision.

D. Exchange Controls

There are currently no Jersey foreign exchange control restrictions on remittances of dividends on the ordinary shares or on the conduct of the Registrant’s operations.

E. Taxation

The taxation discussion set forth below is intended only as a descriptive summary and does not purport to be a complete technical analysis or listing of all potential tax effects relevant to a decision to purchase, hold or in any way transfer ordinary shares or ADSs. Each investor should seek advice based on their individual particular circumstances from an independent tax adviser.

The following summary of the Jersey (UK in relation to dividend distributions) and the United States tax consequences is not exhaustive of all possible tax considerations and should not be considered legal or tax advice. In addition, this summary does not represent a detailed description of the tax consequences applicable to persons subject to special treatment under Jersey and United States tax laws. Prospective purchasers of ADSs are advised to satisfy themselves as to the overall tax consequences of their ownership of ADSs and the ordinary shares represented thereby by consulting their own tax advisors. In addition, this summary only addresses holders that hold ordinary shares or ADSs as capital assets, and it does not address the taxation of a United States shareholder (either corporate or individual) where that shareholder controls, or is deemed to control, 10% or more of the voting stock of the Company.

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References in this discussion to WPP Shares include references to WPP ADSs and corresponding references to WPP Share Owners (or holders of WPP ADSs) include references to holders of WPP ADSs, unless indicated otherwise.

United Kingdom, Jersey and the United States taxation

United Kingdom taxation

Tax on dividends

The Company will not be required to withhold UK tax at source from dividend payments it makes.

WPP Share Owners who are resident outside the UK for tax purposes will not generally be able to claim repayment from HMRC of any part of the tax credit attaching to dividends received from WPP paid before 6 April 2016, although this will depend on the existence and terms of any double taxation convention between the UK and the country in which such WPP Share Owner is resident. A WPP Share Owner resident outside the UK may also be subject to taxation on dividend income under local law. A WPP Share Owner who is not solely resident in the UK for tax purposes should consult his own tax advisers concerning his tax liabilities (in the UK and any other country) on dividends received from WPP, whether they are entitled to claim any part of the tax credit and, if so, the procedure for doing so, and whether any double taxation relief is due in any country in which they are subject to tax. From 6 April 2016, the dividend tax credit previously available to UK resident individuals is replaced by a Dividend Allowance for UK taxpayers.

Taxation of disposals

An individual WPP Share Owner who has ceased to be resident or ordinarily resident for tax purposes in the UK for a period of less than five tax years and who disposes of all or part of his WPP Shares during that period may be liable to capital gains tax in respect of any chargeable gain arising from such a disposal on his return to the UK, subject to any available exemptions or reliefs.

Stamp duty and stamp duty reserve tax (SDRT)

No UK stamp duty or SDRT will be payable on the issue of WPP Shares. UK stamp duty should generally not need to be paid on a transfer of the WPP Shares. No UK SDRT will be payable in respect of any agreement to transfer WPP Shares unless they are registered in a register kept in the UK by or on behalf of WPP. It is not intended that such a register will be kept in the UK.

The statements in this paragraph summarise the current position on stamp duty and SDRT and are intended as a general guide only. Special rules apply to agreements made by, amongst others, intermediaries and certain categories of person may be liable to stamp duty or SDRT at higher rates.

Jersey taxation

General

The following summary of the anticipated tax treatment in Jersey of WPP and WPP Share Owners and holders of WPP ADSs (other than residents of Jersey) is based on Jersey taxation law as it is understood to apply at the date of this Form 20-F. It does not constitute legal or tax advice. WPP Share Owners or holders of WPP ADSs should consult their professional advisers on the implications of acquiring, buying, holding, selling or otherwise disposing of WPP Shares or WPP ADSs under the laws of the jurisdictions in which they may be liable to taxation. WPP Share Owners or holders of WPP ADSs should be aware that tax rules and practice and their interpretation may change.

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Income Tax

(a) WPP

Under the Jersey Income Tax Law, WPP will be regarded as either:

(i) not resident in Jersey under Article 123(1) of the Jersey Income Tax Law provided that (and for so long as) it satisfies the conditions set out in that provision, in which case WPP will not (except as noted below) be liable to Jersey income tax; or

(ii) resident in Jersey and will fall under Article 123C of the Jersey Income Tax Law, in which case WPP (being neither a financial services company nor a specified utility company under the Jersey Income Tax Law at the date hereof) will (except as noted below) be subject to Jersey income tax at a rate of 0 percent.

WPP is tax resident in the United Kingdom and therefore should not be regarded as resident in Jersey.

(b) Holders of WPP Shares

WPP will be entitled to pay dividends to holders of WPP Shares without any withholding or deduction for or on account of Jersey tax. Holders of WPP Shares (other than residents of Jersey) will not be subject to any tax in Jersey in respect of the holding, sale or other disposition of such WPP Shares.

(c) Holders of WPP ADSs

Under Jersey law and the WPP Articles, WPP is only permitted to pay a dividend to a person who is recorded in its register of members as the holder of a WPP Share. The US Depositary will be recorded in WPP’s register of members as the holder of each WPP Share represented by a WPP ADS. Accordingly, WPP will pay all dividends in respect of each WPP Share represented by a WPP ADS to the US Depositary (as the registered holder of each such WPP Share) rather than to the holder of the ADS.

The US Depositary will not be subject to any tax in Jersey in respect of the holding, sale or other disposition of the WPP Shares held by it. In addition, holders of the WPP ADSs (other than residents of Jersey) should not be subject to any tax in Jersey in respect of the holding, sale or other disposition of such WPP ADSs.

Goods and services tax

WPP is an “international services entity” for the purposes of the Goods and Services Tax (Jersey) Law 2007 (the “GST Law”). Consequently, WPP is not required to:

(a) register as a taxable person pursuant to the GST Law;

(b) charge goods and services tax in Jersey in respect of any supply made by it; or

(c) subject to limited exceptions that are not expected to apply to WPP, pay goods and services tax in Jersey in respect of any supply made to it.

Stamp duty

No stamp duty is payable in Jersey on the issue or inter vivos transfer of WPP Shares or WPP ADSs.

Upon the death of a WPP Share Owner, a grant of probate or letters of administration will be required to transfer the WPP Shares of the deceased person. However, WPP may (at its discretion) dispense with this requirement where: (a) the deceased person was domiciled outside of Jersey at the time of death; and (b) the value of the deceased’s movable estate in Jersey (including any WPP Shares) does not exceed £10,000.

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Upon the death of a WPP Share Owner, where the deceased person was domiciled outside of Jersey at the time of death, Jersey stamp duty will be payable on the registration in Jersey of a grant of probate or letters of administration, which will be required in order to transfer or otherwise deal with the deceased person’s personal estate situated in Jersey (including any WPP Shares) if the net value of such personal estate exceeds £10,000.

The rate of stamp duty payable is:

(i) (where the net value of the deceased person’s relevant personal estate is more than £10,000 but does not exceed £100,000) 0.50 percent of the net value of the deceased person’s relevant personal estate; or

(ii) (where the net value of the deceased person’s relevant personal estate exceeds £100,000) £500 for the first £100,000 plus 0.75 percent of the net value of the deceased person’s relevant personal estate which exceeds £100,000.

In addition, application and other fees may be payable.

US federal income taxation

Introduction

The following is a summary of certain material US federal income tax consequences of the ownership and disposition of WPP Shares or WPP ADSs by a US Holder (as defined below). This summary deals only with initial acquirers of WPP Shares or WPP ADSs that are US Holders and that will hold the WPP Shares or WPP ADSs as capital assets. The discussion does not cover all aspects of US federal income taxation that may be relevant to, or the actual tax effect that any of the matters described herein will have on, the acquisition, ownership or disposition of WPP Shares or WPP ADSs by particular investors, and does not address state, local, foreign or other tax laws. In particular, this summary does not address all of the tax considerations that may be relevant to investors subject to special treatment under the US federal income tax laws (such as financial institutions, insurance companies, investors liable for the alternative minimum tax, investors that own (directly or indirectly) 10% or more of the voting stock of WPP, investors that hold WPP Shares or WPP ADSs through a permanent establishment, individual retirement accounts and other tax-deferred accounts, tax-exempt organisations, dealers in securities or currencies, traders that elect to mark to market, investors that will hold the WPP Shares or WPP ADSs as part of straddles, hedging transactions or conversion transactions for US federal income tax purposes, investors whose functional currency is not the US dollar or persons who received their WPP Shares or WPP ADSs in connection with the performance of services or on exercise of options received as compensation in connection with the performance of services).

As used herein, the term “US Holder” means a beneficial owner of WPP Shares or WPP ADSs that is, for US federal income tax purposes: (i) a citizen or individual resident of the United States; (ii) a corporation, or other entity treated as a corporation for US federal tax purposes, created or organised in or under the laws of the United States or any State thereof; (iii) an estate the income of which is subject to US federal income tax without regard to its source; or (iv) a trust if a court within the United States is able to exercise primary supervision over the administration of the trust and one or more US persons have the authority to control all substantial decisions of the trust, or the trust has elected to be treated as a domestic trust for US federal income tax purposes.

This discussion does not address any tax consequences applicable to holders of equity interests in a holder of WPP Shares or WPP ADSs. The US federal income tax treatment of a partner in a partnership that holds WPP Shares or WPP ADSs will depend on the status of the partner and the activities of the partnership. Holders of WPP Shares or WPP ADSs that are partnerships should consult their tax advisers concerning the US federal income tax consequences to their partners of the acquisition, ownership and disposition of WPP Shares or WPP ADSs.

WPP does not expect to become a passive foreign investment company (a “PFIC”) for US federal income tax purposes and this summary assumes the correctness of this position. WPP’s possible status as a PFIC must be

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determined annually and therefore may be subject to change. If WPP were to be a PFIC in any year, materially adverse consequences could result for US Holders.

The summary is based on the US federal income tax laws, including the US Internal Revenue Code of 1986 as amended, its legislative history, existing and proposed regulations thereunder, published rulings and court decisions, all as currently in effect, and all of which are subject to change, perhaps with retroactive effect.

The summary of US federal income tax consequences set out below is for general information only. US Holders are urged to consult with their own tax advisers as to the particular tax consequences to them of owning the WPP Shares or WPP ADSs, including the applicability and effect of state, local, foreign and other tax laws and possible changes in tax law.

Classification of the WPP ADSs

US Holders of WPP ADSs should be treated for US federal income tax purposes as owners of the WPP Shares represented by the WPP ADSs. Accordingly, the US federal income tax consequences discussed below apply equally to US Holders of WPP ADSs.

Tax on dividends

Distributions paid by WPP out of current or accumulated earnings and profits (as determined for US federal income tax purposes) will generally be taxable to a US Holder as foreign source dividend income, and will not be eligible for the dividends received deduction generally allowed to US corporations. A US Holder of WPP ADSs generally will include dividends in gross income in the taxable year in which such holder actually or constructively receives the dividend. US Holders that surrender their WPP ADSs in exchange for the underlying WPP Shares should consult their tax advisers regarding the proper timing for including dividends in gross income.

Distributions in excess of current and accumulated earnings and profits will be treated as a non-taxable return of capital to the extent of the US Holder’s basis in the WPP Shares or WPP ADSs and thereafter as capital gains. However, WPP will not maintain calculations of its earnings and profits in accordance with US federal income tax accounting principles. US Holders should, therefore, assume that any distribution by WPP with respect to the WPP Shares or WPP ADSs will constitute ordinary dividend income. US Holders should consult their tax advisers with respect to the appropriate US federal income tax treatment of any distribution received from WPP.

Under current federal income tax law, dividends paid by a foreign corporation to a non-corporate US Holder as “qualified dividend income” are taxable at the special reduced rate normally applicable to capital gains provided the foreign corporation qualifies for the benefits of the income tax treaty between the United States and the corporation’s country of residence. In such case, the non-corporate US Holder is eligible for the reduced rate only if the US Holder has held the shares or ADSs for more than 60 days during the 121 day-period beginning 60 days before the ex-dividend date. WPP believes it will qualify for the benefits of the income tax treaty between the United States and the United Kingdom (the “Treaty”).

US Holders of WPP Shares or WPP ADSs who receive distributions from WPP will need to consult their own tax advisors regarding the continued applicability of this special reduced rate to such distributions.

Dividends paid in pounds sterling will be included in income in a US dollar amount calculated by reference to the exchange rate in effect on the day the dividends are received by the US Holder in the case of WPP Shares or the US Depositary (in case of WPP ADSs), regardless of whether the pounds sterling are converted into US dollars at that time. If dividends received in pounds sterling are converted into US dollars on the day they are received, the US Holder generally will not be required to recognise a foreign currency gain or loss in respect of the dividend income. Generally, a gain or loss realised on a subsequent conversion of pounds sterling to US dollars or other disposition will be treated as US source ordinary income or loss.

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Sale or other disposition

Upon a sale or other disposition of WPP Shares or WPP ADSs (other than an exchange of WPP ADSs for WPP Shares), a US Holder generally will recognise a capital gain or loss equal to the difference, if any, between the amount realised on the sale or other disposition and the US Holder’s adjusted tax basis in the WPP Shares or WPP ADSs. This capital gain or loss will generally be US source and will be a long-term capital gain or loss if the US Holder’s holding period in the WPP Shares or WPP ADSs exceeds one year. However, regardless of a US Holder’s actual holding period, any loss may be a long-term capital loss if the US Holder receives a dividend that exceeds 10% of the US Holder’s tax basis in its WPP Shares or WPP ADSs and to the extent such dividend qualifies for the reduced rate described above under the section entitled “Tax on Dividends”. Deductibility of capital losses is subject to limitations.

A US Holder’s tax basis in a WPP Share or a WPP ADS will generally be its US dollar cost. The US dollar cost of a WPP Share or a WPP ADS purchased with foreign currency will generally be the US dollar value of the purchase price on the date of purchase or, in the case of WPP Shares or WPP ADSs traded on an established securities market, as defined in the applicable Treasury Regulations, that are purchased by a cash basis US Holder (or an accrual basis US Holder that so elects), on the settlement date for the purchase. Such an election by an accrual basis US Holder must be applied consistently from year to year and cannot be revoked without the consent of the Internal Revenue Service (the “IRS”).

The surrender of WPP ADSs in exchange for WPP Shares (or vice versa) should not be a taxable event for US federal income tax purposes and US Holders should not recognise any gain or loss upon such a surrender. A US Holder’s tax basis in the withdrawn WPP Shares will be the same as the US Holder’s tax basis in the WPP ADSs surrendered, and the holding period of the WPP Shares will include the holding period of the WPP ADSs.

The amount realised on a sale or other disposition of WPP Shares or WPP ADSs for an amount in foreign currency will be the US dollar value of this amount on the date of sale or disposition. On the settlement date, the US Holder will recognise US source foreign currency gain or loss (taxable as ordinary income or loss) equal to the difference (if any) between the US dollar value of the amount received based on the exchange rates in effect on the date of sale or other disposition and the settlement date. However, in the case of WPP Shares or WPP ADSs traded on an established securities market that are sold by a cash basis US Holder (or an accrual basis US Holder that so elects), the amount realised will be determined using the exchange rate in effect on the settlement date for the sale, and no exchange gain or loss will be recognised at that time.

Foreign currency received on the sale or other disposition of a WPP Share or a WPP ADS will have a tax basis equal to its US dollar value on the settlement date. Any gain or loss recognised on a sale or other disposition of a foreign currency (including upon exchange for US dollars) will be US source ordinary income or loss.

Net Investment Tax

In addition, the net investment income of individuals and certain trusts (including income realised through certain pass-through entities), subject to certain thresholds, will be subject to an additional net investment tax of 3.8%. “Net investment income” is the excess of certain types of passive income, including dividends on and capital gains from distributions on or dispositions of a WPP Share or a WPP ADS, over certain related investment expenses. Thus, both dividends and capital gains realised directly or indirectly by an individual or trust will generally be added in computing the net investment income of such individual or trust subject to this additional tax. Taxpayers are urged to consult their own tax advisors with respect to the applicability of this tax.

Backup withholding and information reporting

Payments of dividends and other proceeds with respect to WPP Shares or WPP ADSs by a US paying agent or other US intermediary will be reported to the IRS and to the US Holder unless the holder is a corporation or

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otherwise establishes a basis for exemption. Backup withholding may apply to reportable payments if the US Holder fails to provide an accurate taxpayer identification number or certification of exempt status or fails to report all interest and dividends required to be shown on its US federal income tax returns. Any backup withholding tax will be refunded or allowed as a credit against the US Holder’s US federal income tax liability if the US Holder timely gives the appropriate information to the IRS. US Holders should consult their tax advisers as to their qualification for exemption from backup withholding and the procedure for obtaining an exemption.

F. Dividends and Paying Agents

Not applicable.

G. Statements by Experts

Not applicable.

H. Documents on Display

The Company is subject to the informational requirements of the Exchange Act. In accordance with these requirements, the Company files reports and other information with the United States Securities and Exchange Commission. You may read and copy any materials filed with the SEC at the Public Reference Room at 100 F Street N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC also maintains a web site at http://www.sec.gov that contains reports, proxy statements and other information regarding registrants that file electronically with the SEC.

I. Subsidiary Information

Not applicable.

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ITEM 11. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The Company’s principal market risks are changes in interest rates and currency exchange rates. Following evaluation of these positions, the Company selectively enters into derivative financial instruments to manage its risk exposure. The fair value of derivatives held by the Company at 31 December 2017 is estimated to be a net liability of £3.7 million (£3.1 million with respect to derivative assets and £6.8 million for derivative liabilities). These amounts are based on market values of equivalent instruments at the balance sheet date.

Interest rate and foreign currency risks

The Company’s interest rate and foreign currency risks management policies are discussed in note 24 to the consolidated financial statements.

Interest rate derivatives and currency derivatives utilised by the Group are discussed in note 25 to the consolidated financial statements.

Analysis of fixed and floating rate debt by currency, including the effect of interest rate and cross currency swaps, as at the balance sheet date is provided in note 10 to the consolidated financial statements.

Sensitivity analyses that address the effect of interest rate and currency risks on the Group’s financial instruments is provided in note 24 to the consolidated financial statements.

Credit risk

Our credit risk exposure and management policies are discussed in note 24 to the consolidated financial statements.

ITEM 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES

A. Debt Securities

Not applicable.

B. Warrants and Rights

Not applicable.

C. Other Securities

Not applicable.

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D. American Depositary Shares

Fees and Charges

Holders of ADSs and persons depositing ordinary shares or surrendering ADSs for cancellation are currently required to pay the following service fees to the Depositary:

Service	Rate	By Whom Paid
(1)   Issuance of ADSs upon deposit of ordinary shares (excluding issuances as a result of distributions described in paragraph (4) below).	Up to U.S.$5.00 per 100 ADSs (or fraction thereof) issued.	Person depositing ordinary shares or person receiving ADSs.
(2)   Delivery of deposited securities against surrender of ADSs.	Up to U.S.$5.00 per 100 ADSs (or fraction thereof) surrendered.	Person surrendering ADSs for purpose of withdrawal of deposited securities or person to whom deposited securities are delivered.
(3)   Distribution of cash dividends or other cash distributions (i.e., sale of rights and other entitlements).	Up to U.S.$2.00 per 100 ADSs (or fraction thereof) held, unless prohibited by the exchange upon which the ADSs are listed.	Person to whom distribution is made.
(4)   Distribution of ADSs pursuant to (i) stock dividends or other free stock distributions, or (ii) exercise of rights to purchase additional ADSs.	Up to U.S.$5.00 per 100 ADSs (or fraction thereof) issued, unless prohibited by the exchange upon which the ADSs are listed.	Person to whom distribution is made.
(5)   Distribution of securities other than ADSs or rights to purchase additional ADSs (i.e., spin-off shares).	Up to U.S.$5.00 per unit of 100 securities (or fraction thereof) distributed.	Person to whom distribution is made.
(6)   Depositary Services.	Up to U.S.$2.00 per 100 ADSs (or fraction thereof) held as of the last day of each calendar year, except to the extent of any cash dividend fee(s) charged under paragraph (3) above during the applicable calendar year.	Person of record on last day of any calendar year.
(7)   Transfer of ADRs.	U.S.$1.50 per certificate presented for transfer.	Person presenting certificate for transfer.

Holders of ADSs and persons depositing ordinary shares or surrendering ADSs for cancellation and for the purpose of withdrawing deposited securities are also responsible for the payment of certain fees and expenses incurred by the Depositary, and certain taxes and governmental charges, such as:

(i) Taxes (including applicable interest and penalties) and other governmental charges;

(ii) Such registration fees as may from time to time be in effect for the registration of ordinary shares on the share register and applicable to transfers of ordinary shares or other securities on deposit to or from the name of the Custodian, the Depositary or any nominees upon the making of deposits and withdrawals, respectively;

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(iii) Such cable, telex and facsimile transmission and delivery expenses as are expressly provided in the deposit agreement to be at the expense of the person depositing or withdrawing ordinary shares or holders of ADSs;

(iv) The expenses and charges incurred by the Depositary in the conversion of foreign currency;

(v) Such fees and expenses as are incurred by the Depositary in connection with compliance with exchange control regulations and other regulatory requirements applicable to ordinary shares, ordinary shares on deposit, ADSs and ADRs; and

(vi) The fees and expenses incurred by the Depositary, the Custodian or any nominee in connection with the servicing or delivery of ordinary shares on deposit.

WPP has agreed to pay various other charges and expenses of the Depositary. Please note that the fees and charges that holders of ADSs may be required to pay may vary over time and may be changed by WPP and by the Depositary. Holders of ADSs will receive prior notice of such changes.

Depositary Payments—Fiscal Year 2017

WPP did not receive any payments from Citibank, N.A., the Depositary for its American Depositary Receipt program, in 2017.

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PART II

ITEM 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES

None.

ITEM 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS

None.

ITEM 15. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

We performed an evaluation under the supervision and with the participation of our management, including our Executive Chairman and our Group Chief Financial Officer, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as at 31 December 2017. Notwithstanding the foregoing, a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that it will detect or uncover failures within the Company to disclose material information otherwise required to be set forth in the Company’s periodic reports. Following the evaluation described above, our management, including the Executive Chairman and Group Chief Financial Officer, concluded that our disclosure controls and procedures were effective at that time.

Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act). Our management, with the participation of our Executive Chairman and our Group Chief Financial Officer, carried out an assessment of the effectiveness of our internal control over financial reporting as at 31 December 2017. The assessment was performed using the criteria for effective internal control reflected in the Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

Based on our assessment of the system of internal control, management concludes that as at 31 December 2017 our internal control over financial reporting was effective.

The Company’s internal control over financial reporting as at 31 December 2017 has been audited by Deloitte LLP, an independent registered public accounting firm, who also audited the Company’s consolidated financial statements. Their audit report on the effectiveness of internal control over financial reporting is presented on page 75.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of WPP plc

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of WPP plc and subsidiaries (the “Company”) as of 31 December 2017, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of 31 December 2017, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements at and for the year ended 31 December 2017, of the Company and our report dated 30 April 2018, expressed an unqualified opinion on those consolidated financial statements and included an explanatory paragraph regarding the change in accounting policy of the presentation of the consolidated income statement for the year ended 31 December 2017 to a “function of expense” method of presentation as outlined in International Accounting Standards 1, Presentation of Financial Statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorisations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorised acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte LLP

Deloitte LLP

London, United Kingdom

30 April 2018

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Changes in Internal Control Over Financial Reporting

There has been no change in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during 2017, that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

ITEM 16A. AUDIT COMMITTEE FINANCIAL EXPERT

The audit committee consisted of Jacques Aigrain, Tarek Farahat, and Sol Trujillo at 31 December 2017 and as at the date of this report. The board of directors has determined that all members of the audit committee are “independent” as that term is defined in the applicable NYSE listing standards and rules of the Securities and Exchange Commission.

WPP has two audit committee financial experts, Jacques Aigrain, serving as Chairman of the audit committee, and Tarek Farahat, a member of the committee. See the biographies of Jacques Aigrain and Tarek Farahat in Item 6A.

ITEM 16B. CODE OF ETHICS

WPP has in place a Code of Business Conduct that constitutes a “code of ethics” as defined in applicable regulations of the Securities and Exchange Commission. The Code of Business Conduct which is regularly reviewed by the Audit Committee and the Board and was last updated in 2016, sets out the principal obligations of all directors, officers and employees. Directors and senior executives throughout the Group are required each year to sign this Code. The WPP Code of Business Conduct is available on the Company’s website, http://www.wpp.com/wpp/about/howwebehave/governance. This Annual Report on Form 20-F does not incorporate by reference information on the Company’s website.

ITEM 16C. PRINCIPAL ACCOUNTANT FEES AND SERVICES

	2017 £m	2016 £m
Audit fees	26.1	24.5
Tax fees1	0.2	2.9
All other fees2	4.6	5.8
	30.9	33.2

¹  Tax fees comprise tax advisory, planning and compliance services. All tax fees were approved by Audit Committee.

²  Other fees comprise services, including fees for due diligence and review of earn-out payment calculations. All other fees were approved by Audit Committee.

See note 3 to the consolidated financial statements for more details of auditors’ remuneration for the years ended 31 December 2017, 2016 and 2015.

Audit Committee Pre-Approval Policies and Procedures

The Audit Committee has adopted a pre-approval policy for the engagement of the external auditors in relation to the supply of permissible non-audit services, taking into account relevant ethical and regulatory requirements. WPP’s policy regarding non-audit services that may be provided by the Group’s auditors, Deloitte LLP, prohibits certain categories of work in line with relevant guidance on independence, such as ethical standards issued by the Auditing Practices Board and independence rules of the Public Company Accounting Oversight Board (United States) and the SEC. Other categories of work may be undertaken by Deloitte LLP subject to an approvals process that is designed appropriately for different categories and values of proposed work.

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ITEM 16D. EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES

Not applicable.

ITEM 16E. PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS

At the Annual General Meeting of WPP plc on 8 June 2016 a special resolution was passed authorising WPP plc to make market purchases of its own shares up to a maximum number of 129,365,131 ordinary shares. This authority expired at the Annual General Meeting of WPP plc on 7 June 2017 and was replaced by a new authority to purchase up to a maximum number of 127,887,590 ordinary shares until the earlier of the conclusion of the Annual General Meeting of WPP plc in 2018 and 1 September 2018.

	Total number of shares purchased		Average price (£)		Total number of shares purchased as part of publicly announced plan			Maximum number of shares that may yet be purchased under plan
January		2,850,000		18.60		2,850,000			109,461,326
February		2,450,000		18.73		2,450,000			107,011,326
March		4,725,000		17.06		4,725,000			102,286,326
April		—		—		—			102,286,326
May		3,600,000		17.04		3,600,000			98,686,326
June		2,900,000		17.04		2,900,000	1		126,187,590
July		—		—		—			126,187,590
August		1,250,000		14.38		1,250,000			124,937,590
September		6,300,000		13.95		6,300,000			118,637,590
October		—		—		—			118,637,590
November		4,479,644		12.84		4,479,644			114,157,946
December		3,850,000		13.11		3,850,000			110,307,946
Total		32,404,644		15.56		32,404,644

¹  1,200,000 of the shares purchased were under the authority granted at the Annual General Meeting on 8 June 2016.

ITEM 16F. CHANGE IN REGISTRANT’S CERTIFYING ACCOUNTANT

Not applicable.

ITEM 16G. CORPORATE GOVERNANCE

The Company’s ADSs are listed on the NYSE. In general, under Section 303A.11 of the NYSE’s Listed Company Manual, foreign private issuers such as WPP listed on the NYSE are permitted to follow home country corporate governance practices instead of certain of the corporate governance requirements of Section 303A of the Listed Company Manual.

The following discussion identifies the principal ways that WPP’s corporate governance practices differ from the requirements of Section 303A of the Listed Company Manual:

• Section 303A.03 requires that non-management directors hold regular executive sessions and that the listed company disclose on its website or in its annual report the name of the director presiding at such sessions. The Company’s non-management directors do not hold executive sessions as this is not required under the UK Corporate Governance Code.

• Sections 303A.04 and 303A.05 require that the written charters of the nominating/corporate governance committee and the compensation committee each require that the committee consist entirely of independent directors. While all current members of the Company’s Nomination and Governance Committee and Compensation Committee are independent, the terms of reference of these committees require, consistent with the UK Corporate Governance Code, that only a majority of the members of each committee be independent.

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• Section 303A.05 requires that compensation committees have authority to retain compensation consultants, legal counsel and other advisers at the issuer’s expense, and that they consider specific factors before doing so. Section 303A.05 also requires that a compensation committee’s written charter cover the preparation of disclosure required of domestic issuers by Item 407(e)(5) of Regulation S-K and delegation of the committee’s duties to one or more subcommittees. The terms of reference of the Company’s Compensation Committee give the committee the authority to obtain outside legal assistance and any professional advice, at the Company’s expense, as the committee considers necessary for the discharge of its responsibilities, but do not specifically require the committee to consider the factors listed in Section 303A.05. The committee’s terms of reference also do not cover the preparation of the Item 407(e)(5) disclosure or delegation of the committee’s duties to subcommittees.

• Section 303A.07 requires that terms of reference of a listed company’s audit committee cover the preparation of disclosure required of domestic issuer by Item 407(d)(3) of Regulation S-K and require that the committee meet separately with management. The terms of reference of the Company’s Audit Committee do not cover these matters, although they do require that the committee meet separately with the auditors and the head of the Company’s internal audit team.

• Section 303A.08 requires that listed companies obtain shareholder approval before a stock option or purchase plan is established or materially revised or other equity compensation arrangement is made or materially revised pursuant to which stock may be acquired by directors, employees or other service providers of the listed company, subject to certain exceptions. The Company seeks share owner approval for the adoption or amendment of stock plans or stock purchase plans only as required by the Articles of Association of the Company, the Listing Rules of the UK Listing Authority (the Listing Rules) and the laws of Jersey.

Subject to the exceptions permitted in the Listing Rules, this involves seeking share owner approval to any such plan that falls into either of the following categories (as defined in the Listing Rules):

(a) an employees’ share scheme if the scheme involves or may involve the issue of new shares or the transfer of treasury shares; and

(b) a long-term incentive plan in which one or more directors of the Company is eligible to participate and to material amendments of that plan to the extent required by the plan’s rules. In this context, it should be noted that the provisions of the rules relating to whether amendments to the plan rules must be approved by share owners must themselves be drafted to ensure compliance with the Listing Rules.

• Section 303A.09 requires that listed companies adopt corporate governance guidelines that cover certain specified matters. The Company follows the UK Corporate Governance Code, which covers all of the matters specified in Section 303A.09 (and more). As is customary for UK companies, the Company states its compliance with the Code on an annual basis rather than adopting the elements of the Code as a separate written policy.

• Section 303A.12 requires that each listed company must provide certain certifications of compliance with the NYSE corporate governance rules annually. The Company complies instead with the requirements of the UK Corporate Governance Code in this regard.

ITEM 16H. MINE SAFETY DISCLOSURE

Not applicable.

78

PART III

ITEM 17. FINANCIAL STATEMENTS

Not applicable.

ITEM 18. FINANCIAL STATEMENTS

The consolidated financial statements of WPP plc at 31 December 2017 and 2016 and for the years ending 31 December 2017, 2016 and 2015 are included in this report beginning on page F-1.

ITEM 19. EXHIBITS

Exhibit No.	Exhibit Title
1.1	Memorandum and Articles of Association of WPP plc (incorporated herein by reference to Exhibit 1 to the Registrant’s Report on Form 6-K filed on 2 January 2013).
2.1	Deposit Agreement dated as of 2  January 2013 among the Registrant, Citibank, N.A. as Depositary, and all holders and beneficial owners from time to time of American Depositary Receipts issued thereunder (incorporated herein by reference to Exhibit 99(A)(I) to the Registrant’s Registration Statement on Form F-6EF filed on 31 December 2012).
2.2	Restricted ADS Letter Agreement dated as of 2  January 2013 between the Registrant and Citibank, N.A., as Depositary (incorporated herein by reference to Exhibit 99(A)(II) to the Registrant’s Registration Statement on Form F-6EF filed on 31  December 2012).
2.3	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to £200 million of 6.375% bonds due 2020 (incorporated herein by reference to Exhibit 2.22 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2007).
2.4	U.S. $2,500,000,000 Revolving Credit Facility Agreement, dated 30  November 2011 (as amended and restated pursuant to an amendment and restatement agreement, dated 14 December 2012, an amendment and restatement agreement, dated 25 April 2013 and an amendment and restatement agreement, dated 14  July 2014), by and among WPP CP LLC and WPP Finance Co. Limited, as Borrowers, and the Guarantors, Facility Agent, Swingline Agent, Bookrunners and Lenders thereto (incorporated by reference to Exhibit (b) to a Schedule TO-T filed by the Registrant on February 20, 2015).
2.5	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to $812.4 million of 4.75% Senior Notes due 2021 (incorporated herein by reference to Exhibit 2.22 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2011).
2.6	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to U.S.$500,000,000 3.625% Guaranteed Senior Notes due September 2022 and $300,000,000 5.125% Guaranteed Senior Notes due 2042 (incorporated herein by reference to Exhibit 2.15 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
2.7	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to U.S.$500,000,000 5.625% Guaranteed Senior Notes due November 2043 (incorporated herein by reference to Exhibit 2.14 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2013).

79

Exhibit No.	Exhibit Title
2.8	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €750  million of 3.00% Fixed Rate Senior Notes due November 2023 (incorporated herein by reference to Exhibit 2.15 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December  2013).
2.9	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to $750,000,000 of 3.750% Senior Notes Due 2024 (incorporated herein by reference to Exhibit 2.13 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2014).
2.10	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €750,000,000 of 2.250% of Senior Notes Due 2026 (incorporated herein by reference to Exhibit 2.14 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2014).
2.11	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €600  million of 1.625% Notes due March 2030 (incorporated herein by reference to Exhibit 2.15 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2014).
2.12	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €600  million of 0.75% Notes due November 2019 (incorporated herein by reference to Exhibit 2.16 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2015).
2.13	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to £400 million of 2.875% Notes due September 2046 (incorporated herein by reference to Exhibit 2.14 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2016).
2.14	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to an A$547 million and NZ$3 million Syndicated Facility Agreement entered into by STW Communications Group Limited (subsequently renamed WPP AUNZ Limited), dated 17 March 2016 (incorporated herein by reference to Exhibit 2.15 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2016).
2.15	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €250  million of senior bonds due May 2020 that pay a coupon of 3 month EURIBOR plus 0.32%.*
2.16	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €250  million of guaranteed senior bonds due March 2022 that pay a coupon of 3 month EURIBOR plus 0.45%.*
2.17	Agreement of Registrant to file, if requested by the Securities and Exchange Commission, instruments relating to €500  million of 1.375% guaranteed senior bonds due March 2025.*
4.1	J. Walter Thompson Company, Inc. Retained Benefit Supplemental Employee Retirement Plan (incorporated herein by reference to Exhibit 4.9 to the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2000).
4.2	Young  & Rubicam Inc. Deferred Compensation Plan (incorporated herein by reference to Exhibit 10.26 to Young  & Rubicam’s Registration Statement on Form S-1 (File No. 333-46929)).
4.3	Amendment No. 2 to Young  & Rubicam Inc. Deferred Compensation Plan effective as of 1 January 1999 (incorporated herein by reference to Exhibit 10.27 to Young  & Rubicam’s Annual Report on Form 10-K for the year ended 31 December 1998).

80

Exhibit No.	Exhibit Title
4.4	Young  & Rubicam Inc. Executive Income Deferral Program (incorporated herein by reference to Exhibit 4.19 to the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2000).
4.5	Ogilvy  & Mather ERISA Excess Plan Summary Plan Description (incorporated herein by reference to Exhibit 4.12 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.6	Ogilvy  & Mather Executive Savings Plan Summary Plan Description, in connection with a 25% matching contribution (incorporated herein by reference to Exhibit 4.13 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.7	Ogilvy  & Mather Executive Savings Plan Summary Plan Description, in connection with a 50% matching contribution (incorporated herein by reference to Exhibit 4.14 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.8	Ogilvy  & Mather Deferred Compensation Plan Summary Plan Description (incorporated herein by reference to Exhibit 4.15 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.9	WPP Executive Stock Option Plan, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.9 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
4.10	WPP plc Restricted Stock Plan, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.10 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
4.11	WPP 2005 Executive Stock Option Plan, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.11 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
4.12	WPP plc Annual Bonus Deferral Programme, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.12 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
4.13	GroupM Executive Savings Plan Summary Plan Description (incorporated herein by reference to Exhibit 4.24 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.14	WPP 2008 Executive Stock Option Plan, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.14 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
4.15	UK Service Agreement, effective from 19  November 2008, between WPP 2005 Limited, Sir Martin Sorrell and WPP plc (incorporated herein by reference to Exhibit 4.28 of the Registrant’s Annual Report on Form 20-F for the year ended 31  December 2008).
4.16	Service Agreement in the USA, effective 26  November 2010, between WPP Group USA, Inc. and Sir Martin Sorrell (incorporated herein by reference to Exhibit 4.23 of the Registrant’s Annual Report on Form 20-F for the year ended 31  December 2010).
4.17	Service Agreement in the USA, dated 30  April 2009, between WPP Group USA, Inc. and Paul W.G. Richardson (incorporated herein by reference to Exhibit 4.30 of the Registrant’s Annual Report on Form 20-F for the year ended 31  December 2008).
4.18	Director’s appointment agreement, dated 21  November 2008, between WPP plc and Paul Richardson (incorporated herein by reference to Exhibit 4.31 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
4.19	Supplemental Retirement Agreement, dated as of 1  July 2008, by and between WPP Group USA, Inc. and Paul Richardson (incorporated herein by reference to Exhibit 4.34 of the Registrant’s Annual Report on Form 20-F for the year ended 31  December 2008).

81

Exhibit No.		Exhibit Title
	4.20	Amendment dated 19  November 2008 to Supplemental Retirement Agreement, dated as of 1 July 2008, by and between WPP Group USA, Inc. and Paul Richardson (incorporated herein by reference to Exhibit 4.35 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
	4.21	Grey Advertising Inc. Senior Executive Officer Post-Employment Compensation Plan (incorporated herein by reference to Exhibit 4.40 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
	4.22	Amendment No.  1 to the Grey Advertising Inc. Senior Executive Officer Post-Employment Compensation Plan, effective as of January 1, 2009 (incorporated herein by reference to Exhibit 4.41 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
	4.23	Amendment No.  1 to the J. Walter Thompson Retained Benefit Supplemental Employee Retirement Plan, effective as of January  1, 2009 (incorporated herein by reference to Exhibit 4.42 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2008).
	4.24	WPP Group plc 2004 Leadership Equity Acquisition Plan, as amended through 12  November 2012 (incorporated herein by reference to Exhibit 4.29 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
	4.25	WPP plc Leadership Equity Acquisition Plan III, as amended through 10  December 2012 (incorporated herein by reference to Exhibit 4.30 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
	4.26	Second Amendment, dated 22  June 2011, to Supplemental Retirement Agreement, dated as of 1 July 2008, by and between WPP Group USA, Inc. and Paul Richardson (incorporated herein by reference to Exhibit 4.41 to the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2011).
	4.27	WPP 2012 Executive Stock Option Plan (incorporated herein by reference to Exhibit 4.32 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2012).
	4.28	WPP plc Executive Performance Share Plan (incorporated herein by reference to Exhibit 4.33 of the Registrant’s Annual Report on Form 20-F filed for the year ended 31 December 2013).
	4.29	WPP Share Option Plan 2015 (incorporated herein by reference to Exhibit 4.32 of the Registrant’s Annual Report on Form 20-F for the year ended 31 December 2016).
	8.1	List of subsidiaries.*
	12.1	Certification of Executive Chairman.*
	12.2	Certification of Group Chief Financial Officer.*
	13.1	Certification of Executive Chairman under 18 U.S.C. Section 1350.*
	13.2	Certification of Group Chief Financial Officer under 18 U.S.C. Section 1350.*
	14.1	Consent of Independent Registered Public Accounting Firm (for WPP plc and subsidiaries).*
	101.INS	XBRL Instance Document*
	101.SCH	XBRL Taxonomy Extension Schema Linkbase Document*
	101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document*
	101.DEF	XBRL Taxonomy Extension Definition Linkbase Document*
	101.LAB	XBRL Taxonomy Extension Label Linkbase Document*
	101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document*

* Filed herewith.

82

Signatures

The Registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this annual report on its behalf.

WPP plc
By:	/s/ Paul W.G. Richardson
	Paul W.G. Richardson Group Chief Financial Officer
	30 April 2018

83

Item 18

INDEX TO FINANCIAL STATEMENTS

Financial Statement Number			Page
	A.	Financial Statements of WPP plc as at 31 December 2017 and 2016 and for the years ended 31 December 2017, 2016 and 2015
		(i)  Report of Independent Registered Public Accounting Firm		F-1
		(ii)  Accounting policies		F-2
		(iii)  Consolidated income statement for the years ended 31  December 2017, 2016, 2015		F-9
		(iv)  Consolidated statement of comprehensive income for the years ended 31  December 2017, 2016, 2015		F-10
		(v)  Consolidated cash flow statement for the years ended 31  December 2017, 2016, 2015		F-11
		(vi)  Consolidated balance sheet at 31 December 2017, 2016		F-12
		(vii)  Consolidated statement of changes in equity for the years ended 31  December 2017, 2016, 2015		F-13
		(viii)  Notes to the consolidated financial statements		F-14

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of WPP plc

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of WPP plc and subsidiaries (the “Company”) at 31 December 2017 and 2016, and the related consolidated income statements, consolidated statements of comprehensive income, consolidated cash flow statements, and consolidated statements of changes in equity for each of the three years in the period ended 31 December 2017 and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company at 31 December 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended 31 December 2017, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of 31 December 2017, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated 30 April 2018, expressed an unqualified opinion on the Company’s internal control over financial reporting.

Change in Accounting Principle

As discussed in the accounting policies of the financial statements, the Company has elected to change its accounting policy in regard to the presentation of the consolidated income statement for the year ended 31 December 2017, moving from a ‘nature of expense’ method of presentation to a ‘function of expense’ method of presentation as outlined in International Accounting Standard 1, Presentation of Financial Statements. The accounting policy change has been applied retrospectively to all periods presented.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte LLP

Deloitte LLP

London, United Kingdom

30 April 2018

We have served as the Company’s auditor since 2002.

F-1

Our 2017 financial statements

Accounting policies

The consolidated financial statements of WPP plc and its subsidiaries (the Group) for the year ended 31 December 2017 have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board as they apply to the financial statements of the Group for the year ended 31 December 2017.

Basis of preparation

The consolidated financial statements have been prepared under the historical cost convention, except for the revaluation of certain financial instruments. The principal accounting policies are set out below.

The financial statements were approved by the Board of Directors and authorized for issue on 30 April 2018.

Basis of consolidation

The consolidated financial statements include the results of the Company and all its subsidiary undertakings made up to the same accounting date. All intra-Group balances, transactions, income and expenses are eliminated in full on consolidation. The results of subsidiary undertakings acquired or disposed of during the period are included or excluded from the consolidated income statement from the effective date of acquisition or disposal.

Presentation

The Group has changed its accounting policy in regard to the presentation of the income statement under IAS 1 Presentation of Financial Statements for the year ended 31 December 2017, moving from a ‘nature of expense’ method of presentation to a ‘function of expense’ method of presentation. The Group considers this to be a more reliable and relevant presentation and prior years have been represented in accordance with IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. This change in accounting policy has not resulted in a change to revenue, operating profit or profit for any of the years presented.

Goodwill and other intangible assets

Intangible assets comprise goodwill, certain acquired separable corporate brand names, acquired customer relationships, acquired proprietary tools and capitalised computer software not integral to a related item of hardware.

Goodwill represents the excess of fair value attributed to investments in businesses or subsidiary undertakings over the fair value of the underlying net assets, including intangible assets, at the date of their acquisition.

Goodwill impairment reviews are undertaken annually or more frequently if events or changes in circumstances indicate a potential impairment. The carrying value of goodwill is compared to the net present value of future cash flows derived from the underlying assets using a projection period of up to five years for each cash-generating unit. After the projection period a steady growth rate representing an appropriate long-term growth rate for the industry is applied. Any impairment is recognised immediately as an expense and is not subsequently reversed.

Corporate brand names, customer relationships and proprietary tools acquired as part of acquisitions of businesses are capitalised separately from goodwill as intangible assets if their value can be measured reliably on initial recognition and it is probable that the expected future economic benefits that are attributable to the asset will flow to the Group.

Certain corporate brands of the Group are considered to have an indefinite economic life because of the institutional nature of the corporate brand names, their proven ability to maintain market leadership and profitable operations over long periods of time and the Group’s commitment to develop and enhance their value. The carrying value of these intangible assets is reviewed at least annually for impairment and adjusted to the recoverable amount if required.

Amortisation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life as follows:

• Brand names (with finite lives) – 10-20 years.

• Customer-related intangibles – 3-10 years.

• Other proprietary tools – 3-10 years.

• Other (including capitalised computer software) – 3-5 years.

Contingent consideration

Contingent consideration is accounted for in accordance with IFRS 3 Business Combinations. Contingent consideration only applies to situations where contingent payments are not dependent on future employment of vendors and any such payments are expensed when they relate to future employment.

Future anticipated payments to vendors in respect of contingent consideration (earnout agreements) are initially recorded at fair value which is the present value of the expected cash outflows of the obligations. The obligations are dependent on the future financial performance of the interests acquired (typically over a four- to five-year period following the year of acquisition)

F-2

Accounting policies (continued)

and assume the operating companies improve profits in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition.

Subsequent adjustments to the fair value are recorded in the consolidated income statement within revaluation of financial instruments.

Property, plant and equipment

Property, plant and equipment are shown at cost less accumulated depreciation and any provision for impairment with the exception of freehold land which is not depreciated. The Group assesses the carrying value of its property, plant and equipment to determine if any impairment has occurred. Where this indicates that an asset may be impaired, the Group applies the requirements of IAS 36 Impairment of Assets in assessing the carrying amount of the asset. This process includes comparing its recoverable amount with its carrying value. Depreciation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life, as follows:

• Freehold buildings – 50 years.

• Leasehold land and buildings – over the term of the lease or life of the asset, if shorter.

• Fixtures, fittings and equipment – 3-10 years.

• Computer equipment – 3-5 years.

Interests in associates and joint ventures

An associate is an entity over which the Group has significant influence. In certain circumstances, significant influence may be represented by factors other than ownership and voting rights, such as representation on the Board of Directors.

The Group’s share of the profits less losses of associate undertakings net of tax, interest and non-controlling interests is included in the consolidated income statement and the Group’s share of net assets is shown within interests in associates in the consolidated balance sheet. The Group’s share of the profits less losses and net assets is based on current information produced by the undertakings, adjusted to conform with the accounting policies of the Group.

The Group assesses the carrying value of its associate undertakings to determine if any impairment has occurred. Where this indicates that an investment may be impaired, the Group applies the requirements of IAS 36 in assessing the carrying amount of the investment. This process includes comparing its recoverable amount with its carrying value.

The Group accounts for joint venture investments under the equity method which is consistent with the Group’s treatment of associates.

Other investments

Other investments are designated as ‘available for sale’ and are shown at fair value with any movements in fair value taken to equity.

On disposal the cumulative gain or loss previously recognised in equity is included in the profit or loss for the year.

Inventory and work in progress

Work in progress is valued at cost, which includes outlays incurred on behalf of clients and an appropriate proportion of directly attributable costs and overheads on incomplete assignments. Provision is made for irrecoverable costs where appropriate. Inventory is stated at the lower of cost and net realisable value.

Trade receivables

Trade receivables are stated net of provisions for bad and doubtful debts.

Foreign currency and interest rate hedging

The Group’s policy on interest rate and foreign exchange rate management sets out the instruments and methods available to hedge interest and currency risk exposures and the control procedures in place to ensure effectiveness.

The Group uses derivative financial instruments to reduce exposure to foreign exchange risk and interest rate movements. The Group does not hold or issue derivative financial instruments for speculative purposes.

Derivatives are initially recognised at fair value at the date a derivative contract is entered into and are subsequently remeasured to their fair value at each balance sheet date. The resulting gain or loss is recognised in profit or loss immediately unless the derivative is designated and effective as a hedging instrument, in which event the timing of the recognition in profit or loss depends on the nature of the hedge relationship.

At the inception of the hedge relationship the entity documents the relationship between the hedging instrument and hedged item, along with its risk

F-3

Accounting policies (continued)

management objectives and its strategy for undertaking various hedge transactions. Furthermore, at the inception of the hedge and on an ongoing basis, the Group documents whether the hedging instrument that is used in a hedging relationship is highly effective in offsetting changes in fair values or cash flows of the hedged item.

Note 25 contains details of the fair values of the derivative instruments used for hedging purposes.

Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recorded in profit or loss immediately, together with any changes in the fair value of the hedged item that is attributable to the hedged risk.

The effective portion of changes in the fair value of derivatives that are designated and qualify as cash flow or net investment hedges is deferred in equity. The gain or loss relating to the ineffective portion is recognised immediately in profit or loss. Amounts deferred in equity are recycled in profit or loss in the periods when the hedged item is recognised in profit or loss. However, when the forecast transaction that is hedged results in the recognition of a non-financial asset or a non-financial liability, the gains and losses previously deferred in equity are transferred from equity and included in the initial measurement of the cost of the asset or liability.

Hedge accounting is discontinued when the hedging instrument expires or is sold, terminated, or exercised, or no longer qualifies for hedge accounting. At that time, any cumulative gain or loss on the hedging instrument recognised in equity is retained in equity until the forecast transaction occurs. If a hedged transaction is no longer expected to occur, the net cumulative gain or loss recognised in equity is transferred to net profit or loss for the period.

Derivatives embedded in other financial instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of host contracts and the host contracts are not carried at fair value with unrealised gains or losses reported in the consolidated income statement.

Liabilities in respect of option agreements

Option agreements that allow the Group’s equity partners to require the Group to purchase a non-controlling interest are treated as derivatives over equity instruments and are recorded in the consolidated balance sheet initially at the present value of the redemption amount in accordance with IAS 32 Financial Instruments: Presentation and subsequently measured at fair value in accordance with IAS 39 Financial Instruments: Recognition and Measurement. The movement in the fair value is recognised as income or expense within revaluation of financial instruments in the consolidated income statement.

Derecognition of financial liabilities

In accordance with IAS 39 Financial Instruments: Recognition and Measurement, a financial liability of the Group is only released to the consolidated income statement when the underlying legal obligation is extinguished.

Debt

Interest-bearing debt is recorded at the proceeds received, net of direct issue costs.

Borrowing costs

Finance costs of borrowing are recognised in the consolidated income statement over the term of those borrowings.

Revenue recognition

Revenue comprises commission and fees earned in respect of amounts billed. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. Revenue is stated exclusive of VAT, sales taxes and trade discounts.

Advertising and Media Investment Management

Revenue is typically derived from commissions on media placements and fees for advertising services. Revenue may consist of various arrangements involving commissions, fees, incentive-based revenue or a combination of the three, as agreed upon with each client.

Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. The amount of revenue recognised depends on whether we act as an agent or as a principal in an arrangement with a client. Where we act as an agent, the revenue recorded is the net amount retained when the fee or commission is earned. Although the Group may bear credit risk in respect of these activities, the arrangements with our clients are such that we consider that we are acting as an agent on their behalf. In such cases, costs incurred with external suppliers (such as media suppliers) are excluded from our revenue. Where the Group acts as a principal, the revenue recorded is the gross amount billed.

F-4

Accounting policies (continued)

Incentive-based revenue typically comprises both quantitative and qualitative elements; on the element related to quantitative targets, revenue is recognised when the quantitative targets have been achieved; on the element related to qualitative targets, revenue is recognised when the incentive is received or receivable.

The Group receives volume rebates from certain suppliers for transactions entered into on behalf of clients that, based on the terms of the relevant contracts and local law, are either remitted to clients or retained by the Group. If amounts are passed on to clients they are recorded as liabilities until settled or, if retained by the Group, are recorded as revenue when earned.

Data Investment Management

Revenue recognised in proportion to the level of service performed for market research contracts is based on proportional performance. In assessing contract performance, both input and output criteria are reviewed. Costs incurred are used as an objective input measure of performance. The primary input of all work performed under these arrangements is labour. As a result of the relationship between labour and cost, there is normally a direct relationship between costs incurred and the proportion of the contract performed to date. Costs incurred as a proportion of expected total costs is used as an initial proportional performance measure. This indicative proportional performance measure is subsequently validated against other more subjective criteria (i.e. relevant output measures) such as the percentage of interviews completed, percentage of reports delivered to a client and the achievement of any project milestones stipulated in the contract. In the event of divergence between the objective and more subjective measures, the more subjective measures take precedence since these are output measures.

While most of the studies provided in connection with the Group’s market research contracts are undertaken in response to an individual client’s or group of clients’ specifications, in certain instances a study may be developed as an off-the-shelf product offering sold to a broad client base. For these transactions, revenue is recognised when the product is delivered. Where the terms of transaction provide for licensing the product on a subscription basis, revenue is recognised over the subscription period on a straight-line basis or, if applicable, based on usage.

Substantially all services are provided on a fixed price basis. Pricing may also include a provision for a surcharge where the actual labour hours incurred in completing a project are significantly above the labour hours quoted in the project proposal. In instances where this occurs, the surcharge will be included in the total revenue base on which to measure proportional performance when the actual threshold is reached provided that collectability is reasonably assured.

Public Relations & Public Affairs and Brand Consulting, Health & Wellness, and Specialist Communications

Revenue is typically derived from retainer fees and services to be performed subject to specific agreement. Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. Revenue is recognised on long-term contracts, if the final outcome can be assessed with reasonable certainty, by including in the consolidated income statement revenue and related costs as contract activity progresses.

Taxation

Corporate taxes are payable on taxable profits at current rates. The tax expense represents the sum of the tax currently payable and deferred tax.

The Group is subject to corporate taxes in a number of different jurisdictions and judgement is required in determining the appropriate provision for transactions where the ultimate tax determination is uncertain. In such circumstances, the Group recognises liabilities for anticipated taxes based on the best information available and where the anticipated liability is both probable and estimable, liabilities are classified as current. Any interest and penalties accrued are included in corporate income taxes both in the consolidated income statement and balance sheet. Where the final outcome of such matters differs from the amount recorded, any differences may impact the income tax and deferred tax provisions in the period in which the final determination is made.

The tax laws that apply to the Group’s subsidiaries may be amended by the relevant tax authorities. Such potential amendments are regularly monitored and adjustments are made to the Group’s tax liabilities and deferred tax assets and liabilities where necessary.

The tax currently payable is based on taxable profit for the year. Taxable profit differs from net profit as reported in the consolidated income statement because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The Group’s liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the balance sheet date.

F-5

Accounting policies (continued)

Deferred tax is the tax expected to be payable or recoverable on differences between the carrying amounts of assets and liabilities in the financial statements and the corresponding tax bases used in the computation of taxable profit, and is accounted for using the balance sheet liability method. Deferred tax liabilities are recognised for all taxable temporary differences unless specifically excepted by IAS 12 Income Taxes. Deferred tax is charged or credited in the consolidated income statement, except when it relates to items charged or credited to other comprehensive income or directly to equity, in which case the deferred tax is also dealt with in other comprehensive income or equity. Deferred tax assets are recognised to the extent that it is probable that taxable profits will be available against which deductible temporary differences can be utilised, which can require the use of accounting estimation and the exercise of judgement. Such assets and liabilities are not recognised if the temporary difference arises from the initial recognition of goodwill or other assets and liabilities (other than in a business combination) in a transaction that affects neither the taxable profit nor the accounting profit.

The carrying amount of deferred tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered.

Deferred tax liabilities are recognised for taxable temporary differences arising on investments in subsidiaries and associates, and interests in joint ventures, except where the Group is able to control the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to set off current tax assets against current tax liabilities and when they relate to income taxes levied by the same taxation authority and the Group intends to settle its current tax assets and liabilities on a net basis.

Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised based on enacted or substantively enacted legislation.

Retirement benefit costs

The Group accounts for retirement benefit costs in accordance with IAS 19 Employee Benefits.

For defined contribution plans, contributions are charged to the consolidated income statement as payable in respect of the accounting period.

For defined benefit plans the amounts charged to operating profit are the current service costs, past service costs, administrative expenses and gains and losses on settlements and curtailments. They are included as part of staff costs. Past service costs are recognised immediately in the consolidated income statement when the related plan amendment occurs. Net interest expense is calculated by applying the discount rate to the recognised overall surplus or deficit in the plan.

Actuarial gains and losses are recognised immediately in the consolidated statement of comprehensive income.

Where defined benefit plans are funded, the assets of the plan are held separately from those of the Group, in separate independently managed funds. Pension plan assets are measured at fair value and liabilities are measured on an actuarial basis using the projected unit method and discounted at a rate equivalent to the current rate of return on a high-quality corporate bond of equivalent currency and term to the plan liabilities. The actuarial valuations are obtained at least triennially and are updated at each balance sheet date.

Recognition of a surplus in a defined benefit plan is limited based on the economic gain the Company is expected to benefit from in the future by means of a refund or reduction in future contributions to the plan, in accordance with IAS 19.

Finance leases

Assets held under finance leases are recognised as assets of the Group at the inception of the lease at the lower of their fair value and the present value of the minimum lease payments. Depreciation on leased assets is charged to the consolidated income statement on the same basis as owned assets. Leasing payments are treated as consisting of capital and interest elements and the interest is charged to the consolidated income statement as it is incurred.

Operating leases

Operating lease rentals are charged to the consolidated income statement on a straight-line basis over the lease term. Any premium or discount on the acquisition of a lease is spread over the life of the lease on a straight-line basis.

Translation of foreign currencies

Foreign currency transactions arising from normal trading activities are recorded at the rates in effect at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies at the year end are translated at the year-end exchange rate. Foreign currency gains and losses

F-6

Accounting policies (continued)

are credited or charged to the consolidated income statement as they arise.

The income statements of overseas subsidiary undertakings are translated into pounds sterling at average exchange rates and the year-end net assets of these companies are translated at year-end exchange rates.

Exchange differences arising from retranslation of the opening net assets and on foreign currency borrowings (to the extent that they hedge the Group’s investment in such operations) are reported in the consolidated statement of comprehensive income.

Goodwill and fair value adjustments arising on the acquisition of a foreign entity are treated as assets and liabilities of the foreign entity and translated at the closing rate.

Share-based payments

The Group issues equity-settled share-based payments (including share options) to certain employees and accounts for these awards in accordance with IFRS 2 Share-Based Payment. Equity-settled share-based payments are measured at fair value (excluding the effect of non-market-based vesting conditions) at the date of grant. Details regarding the fair value of equity settled share-based transactions are set out in notes 22 and 26.

The fair value determined at the grant date is recognised in the consolidated income statement as an expense on a straight-line basis over the relevant vesting period, based on the Group’s estimate of the number of shares that will ultimately vest and adjusted for the effect of non-market-based vesting conditions.

New IFRS accounting pronouncements

At the date of authorisation of these financial statements, the following Standards, which have not been applied in these financial statements, were in issue but not yet effective:

• IFRS 9: Financial Instruments;

• IFRS 15: Revenue from Contracts with Customers; and

• IFRS 16: Leases.

IFRS 9 is effective from 1 January 2018. It contains requirements for the classification and measurement of financial assets and liabilities, impairment (introducing an expected loss method) and hedge accounting. The Group does not consider that it will have a significant impact on the financial statements of the Group, particularly given the short-term nature of the Group’s trade receivables, which are mainly due from large national or multinational companies. The principal impact will be for equity investments currently designated as ‘available for sale’, where the Group will elect to recognise the fair value movements of certain equity investments through other comprehensive income. Fair value movements of certain other equity investments will be recognised in profit or loss.

IFRS 15 is effective from 1 January 2018 and it will be applied retrospectively to each prior period presented, we do not expect the adoption of IFRS 15 to have a significant impact on the timing of the Group’s revenue recognition nor on the Group’s equity.

However, for certain of our contracts, the adoption of IFRS 15 will result in a change in our accounting for certain third-party costs. Third-party costs are included in revenue where the Group acts as principal with respect to the services provided to the client and is excluded where the Group acts as agent. Under IFRS 15, the principal versus agent assessment is based on whether we control the relevant services before they are transferred to the client. As a result of the adoption of IFRS 15, there will be an increase in third-party costs included in revenue and costs of services. In 2017, these third-party costs were approximately £500 million. This change will increase revenue and costs of services by the same amount and therefore have no impact on operating profit.

IFRS 16 is effective from 1 January 2019. The standard eliminates the classification of leases as either operating or finance leases and introduces a single accounting model. Lessees will be required to recognise a right-of-use asset and related lease liability for the majority of their operating leases and show depreciation of leased assets and interest on lease liabilities separately in the income statement. IFRS 16 will require the Group to recognise substantially all of its current operating lease commitments on the balance sheet and the financial impact of this, together with other implications of the standard, are currently being assessed.

Critical judgements and estimation uncertainty in applying accounting policies

Management is required to make key decisions and judgements whilst acknowledging there is estimation uncertainty in the process of applying the Group’s accounting policies. These estimates and judgements are reviewed on an ongoing basis. Where judgement has been applied or estimation uncertainty exists, the key factors taken into consideration are disclosed in the accounting

F-7

Accounting policies (continued)

policies and the appropriate note in these financial statements.

The most significant areas of estimation uncertainty include:

• Goodwill (note 12): The discounted cash flow methodology employed by the Group when testing for goodwill impairment requires estimates regarding revenue growth, operating margins discount rates and working capital requirements.

• Payments due to vendors (earnout agreements) and liabilities in respect of put options: Estimates are required regarding growth rates in deriving future financial performance and discount rates to be applied when measuring the liabilities for earnouts and put options. Further details are disclosed in note 25.

• Provision for post-employment benefits (note 23): Estimates are required in the accounting for defined benefit pension plans, including establishing discount rates, rates of increase in salaries and pensions in payment, inflation and mortality assumptions. These estimates are made by management based on the advice of qualified advisors.

The most significant areas of judgements include:

• Revenue recognition: Judgement is required regarding the timing of recognition, particularly in relation to media volume income with regards to whether it is required to be passed back to the client. Further details are set out in the accounting policy.

• Taxation (note 7): Judgement is required in relation to the level of provisions required and the amount of taxes that will be due, particularly given the many countries in which the Group operates.

F-8

Consolidated income statement

For the years ended 31 December 2017, 2016, 2015

	Notes		2017 £m			2016 £m1			2015 £m1
Revenue		2		15,265.4			14,388.9			12,235.2
Costs of services		3		(12,090.2	)		(11,348.1	)		(9,709.1	)
Gross profit				3,175.2			3,040.8			2,526.1
General and administrative costs		3		(1,267.0	)		(977.7	)		(894.1	)
Operating profit				1,908.2			2,063.1			1,632.0
Share of results of associates		4		113.5			49.8			47.0
Profit before interest and taxation				2,021.7			2,112.9			1,679.0
Finance income		6		95.2			80.4			72.4
Finance costs		6		(269.8	)		(254.5	)		(224.1	)
Revaluation of financial instruments		6		262.2			(48.3	)		(34.7	)
Profit before taxation				2,109.3			1,890.5			1,492.6
Taxation		7		(197.0	)		(388.9	)		(247.5	)
Profit for the year				1,912.3			1,501.6			1,245.1
Attributable to:
Equity holders of the parent				1,816.6			1,400.1			1,160.2
Non-controlling interests				95.7			101.5			84.9
				1,912.3			1,501.6			1,245.1
Earnings per share
Basic earnings per ordinary share		9		144.0p			109.6p			90.0p
Diluted earnings per ordinary share		9		142.4p			108.0p			88.4p

Notes

The accounting policies on pages F-2 to F-8 and the accompanying notes on pages F-14 to F-55 form an integral part of this consolidated income statement.

¹  Prior year figures have been re-presented as described in the accounting policies.

F-9

Consolidated statement of comprehensive income

For the years ended 31 December 2017, 2016, 2015

	2017 £m			2016 £m			2015 £m
Profit for the year		1,912.3			1,501.6			1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(465.2	)		1,378.0			(275.9	)
Gain/(loss) on revaluation of available for sale investments		32.1			(93.1	)		206.0
		(433.1	)		1,284.9			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans		17.0			(15.9	)		33.5
Deferred tax on defined benefit pension plans		(24.6	)		(0.4	)		(5.2	)
		(7.6	)		(16.3	)		28.3
Other comprehensive (loss)/income for the year		(440.7	)		1,268.6			(41.6	)
Total comprehensive income for the year		1,471.6			2,770.2			1,203.5
Attributable to:
Equity holders of the parent		1,395.6			2,600.6			1,121.6
Non-controlling interests		76.0			169.6			81.9
		1,471.6			2,770.2			1,203.5

Note

The accounting policies on pages F-2 to F-8 and the accompanying notes on pages F-14 to F-55 form an integral part of this consolidated statement of comprehensive income.

F-10

Consolidated cash flow statement

For the years ended 31 December 2017, 2016, 2015

	Notes		2017 £m			2016 £m			2015 £m
Net cash inflow from operating activities		11		1,408.1			1,773.8			1,359.9
Investing activities
Acquisitions and disposals		11		(181.5	)		(638.8	)		(669.5	)
Purchases of property, plant and equipment				(288.9	)		(252.1	)		(210.3	)
Purchases of other intangible assets (including capitalised computer software)				(37.3	)		(33.0	)		(36.1	)
Proceeds on disposal of property, plant and equipment				8.0			7.7			13.4
Net cash outflow from investing activities				(499.7	)		(916.2	)		(902.5	)
Financing activities
Share option proceeds				6.4			27.2			27.6
Cash consideration for non-controlling interests		11		(47.3	)		(58.3	)		(23.6	)
Share repurchases and buy-backs		11		(504.2	)		(427.4	)		(587.6	)
Net increase/(decrease) in borrowings		11		599.6			(22.5	)		492.0
Financing and share issue costs				(0.8	)		(6.4	)		(11.4	)
Equity dividends paid				(751.5	)		(616.5	)		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings				(87.8	)		(89.6	)		(55.2	)
Net cash outflow from financing activities				(785.6	)		(1,193.5	)		(704.0	)
Net increase/(decrease) in cash and cash equivalents				122.8			(335.9	)		(246.6	)
Translation of cash and cash equivalents				(27.2	)		291.9			(54.4	)
Cash and cash equivalents at beginning of year				1,902.6			1,946.6			2,247.6
Cash and cash equivalents at end of year		11		1,998.2			1,902.6			1,946.6

Note

The accounting policies on pages F-2 to F-8 and the accompanying notes on pages F-14 to F-55 form an integral part of this consolidated cash flow statement.

F-11

Consolidated balance sheet

At 31 December 2017, 2016

	Notes		2017 £m			2016 £m
Non-current assets
Intangible assets:
Goodwill		12		12,952.9			13,214.3
Other		12		2,018.4			2,217.3
Property, plant and equipment		13		979.5			968.7
Interests in associates and joint ventures		14		1,065.2			1,069.4
Other investments		14		1,153.5			1,310.3
Deferred tax assets		15		160.3			140.4
Trade and other receivables		17		176.2			204.9
				18,506.0			19,125.3
Current assets
Inventory and work in progress		16		424.3			400.4
Corporate income tax recoverable				234.7			231.2
Trade and other receivables		17		12,112.3			12,374.5
Cash and short-term deposits				2,391.4			2,436.9
				15,162.7			15,443.0
Current liabilities
Trade and other payables		18		(14,241.1	)		(15,010.4	)
Corporate income tax payable				(649.3	)		(752.3	)
Bank overdrafts, bonds and bank loans		20		(624.1	)		(1,002.5	)
				(15,514.5	)		(16,765.2	)
Net current liabilities				(351.8	)		(1,322.2	)
Total assets less current liabilities				18,154.2			17,803.1
Non-current liabilities
Bonds and bank loans		20		(6,250.4	)		(5,564.9	)
Trade and other payables		19		(992.8	)		(1,273.8	)
Deferred tax liabilities		15		(513.7	)		(692.4	)
Provision for post-employment benefits		23		(206.3	)		(276.5	)
Provisions for liabilities and charges		21		(229.0	)		(227.9	)
				(8,192.2	)		(8,035.5	)
Net assets				9,962.0			9,767.6
Equity
Called-up share capital		26		133.3			133.2
Share premium account				568.5			562.2
Other reserves		27		761.7			1,185.2
Own shares				(1,171.1	)		(962.0	)
Retained earnings				9,200.8			8,405.9
Equity share owners’ funds				9,493.2			9,324.5
Non-controlling interests				468.8			443.1
Total equity				9,962.0			9,767.6

Note

The accounting policies on pages F-2 to F-8 and the accompanying notes on pages F-14 to F-55 form an integral part of this consolidated balance sheet.

F-12

Consolidated statement of changes in equity

For the years ended 31 December 2017, 2016, 2015

	Called- up share capital £m		Share premium account £m		Shares to be issued £m			Other reserves1 £m			Own shares £m			Retained earnings £m			Total equity share owners’ funds £m			Non- controlling interests £m			Total £m
Balance at 1 January 2015		132.6		508.0		0.3			36.2			(283.7	)		7,106.7			7,500.1			326.7			7,826.8
Ordinary shares issued		0.3		27.3		(0.3	)		–			–			0.2			27.5			–			27.5
Treasury share additions		–		–		–			–			(406.0	)		–			(406.0	)		–			(406.0	)
Treasury share allocations		–		–		–			–			3.6			(3.6	)		–			–			–
Profit for the year		–		–		–			–			–			1,160.2			1,160.2			84.9			1,245.1
Exchange adjustments on foreign currency net investments		–		–		–			(272.9	)		–			–			(272.9	)		(3.0	)		(275.9	)
Gain on revaluation of available for sale investments		–		–		–			206.0			–			–			206.0			–			206.0
Actuarial gain on defined benefit pension plans		–		–		–			–			–			33.5			33.5			–			33.5
Deferred tax on defined benefit pension plans		–		–		–			–			–			(5.2	)		(5.2	)		–			(5.2	)
Other comprehensive (loss)/income		–		–		–			(66.9	)		–			28.3			(38.6	)		(3.0	)		(41.6	)
Dividends paid		–		–		–			–			–			(545.8	)		(545.8	)		(55.2	)		(601.0	)
Non-cash share-based incentive plans (including share options)		–		–		–			–			–			99.0			99.0			–			99.0
Tax adjustment on share-based payments		–		–		–			–			–			18.0			18.0			–			18.0
Net movement in own shares held by ESOP Trusts		–		–		–			–			(33.5	)		(148.1	)		(181.6	)		–			(181.6	)
Recognition/remeasurement of financial instruments		–		–		–			(59.0	)		–			(0.7	)		(59.7	)		–			(59.7	)
Share purchases – close period commitments		–		–		–			80.0			–			2.9			82.9			–			82.9
Acquisition of subsidiaries2		–		–		–			–			–			(18.6	)		(18.6	)		25.0			6.4
Balance at 31 December 2015		132.9		535.3		–			(9.7	)		(719.6	)		7,698.5			7,637.4			378.4			8,015.8
Ordinary shares issued		0.3		26.9		–			–			–			–			27.2			–			27.2
Treasury share additions		–		–		–			–			(274.5	)		–			(274.5	)		–			(274.5	)
Treasury share allocations		–		–		–			–			3.9			(3.9	)		–			–			–
Profit for the year		–		–		–			–			–			1,400.1			1,400.1			101.5			1,501.6
Exchange adjustments on foreign currency net investments		–		–		–			1,309.9			–			–			1,309.9			68.1			1,378.0
Loss on revaluation of available for sale investments		–		–		–			(93.1	)		–			–			(93.1	)		–			(93.1	)
Actuarial loss on defined benefit pension plans		–		–		–			–			–			(15.9	)		(15.9	)		–			(15.9	)
Deferred tax on defined benefit pension plans		–		–		–			–			–			(0.4	)		(0.4	)		–			(0.4	)
Other comprehensive income /(loss)		–		–		–			1,216.8			–			(16.3	)		1,200.5			68.1			1,268.6
Dividends paid		–		–		–			–			–			(616.5	)		(616.5	)		(89.6	)		(706.1	)
Non-cash share-based incentive plans (including share options)		–		–		–			–			–			106.5			106.5			–			106.5
Tax adjustment on share-based payments		–		–		–			–			–			3.9			3.9			–			3.9
Net movement in own shares held by ESOP Trusts		–		–		–			–			28.2			(181.1	)		(152.9	)		–			(152.9	)
Recognition/remeasurement of financial instruments		–		–		–			(21.9	)		–			26.8			4.9			–			4.9
Share purchases – close period commitments		–		–		–			–			–			8.6			8.6			–			8.6
Acquisition of subsidiaries2		–		–		–			–			–			(20.7	)		(20.7	)		(15.3	)		(36.0	)
Balance at 31 December 2016		133.2		562.2		–			1,185.2			(962.0	)		8,405.9			9,324.5			443.1			9,767.6
Ordinary shares issued		0.1		6.3		–			–			–			–			6.4			–			6.4
Treasury share additions		–		–		–			–			(289.6	)		–			(289.6	)		–			(289.6	)
Treasury share allocations		–		–		–			–			112.2			(112.2	)		–			–			–
Profit for the year		–		–		–			–			–			1,816.6			1,816.6			95.7			1,912.3
Exchange adjustments on foreign currency net investments		–		–		–			(445.5	)		–			–			(445.5	)		(19.7	)		(465.2	)
Gain on revaluation of available for sale investments		–		–		–			32.1			–			–			32.1			–			32.1
Actuarial gain on defined benefit pension plans		–		–		–			–			–			17.0			17.0			–			17.0
Deferred tax on defined benefit pension plans		–		–		–			–			–			(24.6	)		(24.6	)		–			(24.6	)
Other comprehensive loss		–		–		–			(413.4	)		–			(7.6	)		(421.0	)		(19.7	)		(440.7	)
Dividends paid		–		–		–			–			–			(751.5	)		(751.5	)		(87.8	)		(839.3	)
Non-cash share-based incentive plans (including share options)		–		–		–			–			–			105.0			105.0			–			105.0
Tax adjustment on share-based payments		–		–		–			–			–			3.0			3.0			–			3.0
Net movement in own shares held by ESOP Trusts		–		–		–			–			(31.7	)		(182.9	)		(214.6	)		–			(214.6	)
Recognition/remeasurement of financial instruments		–		–		–			(10.1	)		–			(11.7	)		(21.8	)		–			(21.8	)
Acquisition of subsidiaries2		–		–		–			–			–			(63.8	)		(63.8	)		37.5			(26.3	)
Balance at 31 December 2017		133.3		568.5		–			761.7			(1,171.1	)		9,200.8			9,493.2			468.8			9,962.0

Notes

The accounting policies on pages F-2 to F-8 and the accompanying notes on pages F-14 to F-55 form an integral part of this consolidated statement of changes in equity.

¹  Other reserves are analysed in note 27.

²  Acquisition of subsidiaries represents movements in retained earnings and non-controlling interests arising from changes in ownership of existing subsidiaries and recognition of non-controlling interests on new acquisitions.

F-13

Notes to the consolidated financial statements

1. General information

WPP plc is a company incorporated in Jersey. The address of the registered office is Queensway House, Hilgrove Street, St Helier, Jersey, JE1 1ES and the address of the principal executive office is 27 Farm Street, London, United Kingdom, W1J 5RJ. The nature of the Group’s operations and its principal activities are set out in note 2. These consolidated financial statements are presented in pounds sterling.

2. Segment information

The Group is a leading worldwide communications services organisation offering national and multinational clients a comprehensive range of communications services.

The Group is organised into four reportable segments – Advertising and Media Investment Management; Data Investment Management; Public Relations & Public Affairs; and Brand Consulting, Health & Wellness and Specialist Communications. This last reportable segment includes WPP Digital and direct, digital, & interactive.

IFRS 8 Operating Segments requires operating segments to be identified on the same basis as is used internally for the review of performance and allocation of resources by the Group Chief Executive. Provided certain quantitative and qualitative criteria are fulfilled, IFRS 8 permits the aggregation of these components into reportable segments for the purposes of disclosure in the Group’s financial statements. In assessing the Group’s reportable segments, the directors have had regard to the similar economic characteristics of certain operating segments, their shared client base, the similar nature of their products or services and their long-term margins, amongst other factors.

Operating sectors

Reported contributions were as follows:

Income statement	Revenue1		Revenue less pass-through costs2		Headline PBIT3		Revenue less pass-through costs margin4
	£m		£m		£m		%
2017
Advertising and Media Investment Management		7,180.3		5,851.9		1,109.0		19.0
Data Investment Management		2,690.9		2,052.3		350.3		17.1
Public Relations & Public Affairs		1,171.9		1,140.9		183.2		16.1
Brand Consulting, Health & Wellness and Specialist Communications		4,222.3		4,094.5		624.6		15.3
		15,265.4				2,267.1
2016
Advertising and Media Investment Management		6,547.3		5,413.5		1,027.2		19.0
Data Investment Management		2,661.1		1,994.0		351.5		17.6
Public Relations & Public Affairs		1,101.3		1,078.8		179.8		16.7
Brand Consulting, Health & Wellness and Specialist Communications		4,079.2		3,911.5		601.8		15.4
		14,388.9				2,160.3
2015
Advertising and Media Investment Management		5,552.8		4,652.0		859.7		18.5
Data Investment Management		2,425.9		1,768.1		286.1		16.2
Public Relations & Public Affairs		945.8		929.7		145.2		15.6
Brand Consulting, Health & Wellness and Specialist Communications		3,310.7		3,174.5		483.0		15.2
		12,235.2				1,774.0

Notes

¹  Intersegment sales have not been separately disclosed as they are not material.

²  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

³  A reconciliation from profit before interest and taxation (PBIT) to headline PBIT is provided in note 31. PBIT is reconciled to profit before taxation in the consolidated income statement.

⁴  Revenue less pass-through costs margin is calculated as headline PBIT (defined above) as a percentage of revenue less pass-through costs.

F-14

Notes to the consolidated financial statements (continued)

2. Segment information (continued)

Other information	Share-based payments		Capital additions1		Depreciation and amortisation2		Goodwill impairment		Share of results of associates		Interests in associates and joint ventures
	£m		£m		£m		£m		£m		£m
2017
Advertising and Media Investment Management		57.0		171.3		108.8		19.5		27.0		193.1
Data Investment Management		14.4		58.8		59.9		–		15.3		106.3
Public Relations & Public Affairs		8.6		10.6		12.2		7.6		6.3		34.2
Brand Consulting, Health & Wellness and Specialist Communications		25.0		85.5		86.1		–		64.9		731.6
		105.0		326.2		267.0		27.1		113.5		1,065.2
2016
Advertising and Media Investment Management		60.7		126.2		105.4		20.9		8.3		285.6
Data Investment Management		13.0		61.5		60.9		–		13.2		109.4
Public Relations & Public Affairs		7.5		10.3		11.6		–		3.2		108.1
Brand Consulting, Health & Wellness and Specialist Communications		25.3		87.1		81.5		6.1		25.1		566.3
		106.5		285.1		259.4		27.0		49.8		1,069.4
2015
Advertising and Media Investment Management		55.4		119.7		96.9		15.1		26.8		377.0
Data Investment Management		13.7		58.1		51.8		–		0.8		86.4
Public Relations & Public Affairs		6.7		9.1		9.8		–		2.3		92.0
Brand Consulting, Health & Wellness and Specialist Communications		23.2		59.5		69.9		–		17.1		203.2
		99.0		246.4		228.4		15.1		47.0		758.6

Notes

¹  Capital additions include purchases of property, plant and equipment and other intangible assets (including capitalised computer software).

²  Depreciation of property, plant and equipment and amortisation of other intangible assets.

F-15

2. Segment information (continued)

Notes to the consolidated financial statements (continued)

Contributions by geographical area were as follows:

	2017 £m		2016 £m		2015 £m
Revenue1
North America2		5,547.0		5,280.8		4,491.2
UK		1,985.9		1,866.3		1,777.4
Western Continental Europe		3,160.0		2,943.2		2,425.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,572.5		4,298.6		3,541.0
		15,265.4		14,388.9		12,235.2
Revenue less pass-through costs3
North America2		4,799.0		4,603.7		3,882.3
UK		1,683.5		1,587.6		1,504.5
Western Continental Europe		2,616.0		2,425.5		2,016.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,041.1		3,781.0		3,121.3
Headline PBIT4
North America2		937.4		895.4		728.2
UK		280.0		261.4		243.1
Western Continental Europe		376.0		351.7		277.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		673.7		651.8		525.5
		2,267.1		2,160.3		1,774.0
	Margin		Margin		Margin
Revenue less pass-through costs margin5
North America2		19.5%		19.4%		18.8%
UK		16.6%		16.5%		16.2%
Western Continental Europe		14.4%		14.5%		13.7%
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		16.7%		17.2%		16.8%
		£m		£m
Non-current assets6
North America2		7,667.5		8,189.3
UK		2,098.2		2,138.5
Western Continental Europe		4,542.1		4,321.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,035.8		4,327.2
		18,343.6		18,976.6

Notes

¹ Intersegment sales have not been separately disclosed as they are not material.

²  North America includes the US with revenue of £5,241.3 million (2016: £5,005.8 million, 2015: £4,257.4 million), revenue less pass-through costs of £4,541.0 million (2016: £4,365.1 million, 2015: £3,674.3 million), headline PBIT of £890.3 million (2016: £849.4 million, 2015: £697.3 million) and non-current assets of £7,202.7 million (2016: £7,690.2 million).

³  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

⁴  See note 31 for a reconciliation of PBIT to headline PBIT.

⁵  Revenue less pass-through costs margin is calculated as headline PBIT as a percentage of revenue less pass-through costs.

⁶  Non-current assets excluding financial instruments and deferred tax.

3. Costs of services and general and administrative costs

	2017 £m			2016 £m			2015 £m
Costs of services		12,090.2			11,348.1			9,709.1
General and administrative costs		1,267.0			977.7			894.1
		13,357.2			12,325.8			10,603.2
Costs of services and general and administrative costs include:
	2017 £m			2016 £m			2015 £m
Staff costs (note 5)		8,319.0			7,784.9			6,652.6
Establishment costs		888.6			836.5			726.3
Media pass-through costs		1,350.0			1,223.2			999.7
Data collection pass-through costs		633.7			661.0			647.2
Other costs of services and general and administrative costs1		2,165.9			1,820.2			1,577.4
		13,357.2			12,325.8			10,603.2
Other costs of services and general and administrative costs include:
Goodwill impairment (note 12)		27.1			27.0			15.1
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Amortisation and impairment of acquired intangible assets (note 12)		195.1			168.4			140.1
Amortisation of other intangible assets (note 12)		36.3			38.6			33.7
Depreciation of property, plant and equipment		230.7			215.2			190.0
Losses on sale of property, plant and equipment		1.1			0.8			1.1
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Net foreign exchange losses/(gains)		12.9			(17.0	)		(10.7	)
Operating lease rentals:
Land and buildings		586.6			556.1			476.6
Sublease income		(17.9	)		(11.6	)		(11.3	)
		568.7			544.5			465.3
Plant and machinery		11.9			10.6			18.3
		580.6			555.1			483.6

Notes

¹  Other costs of services and general and administrative costs include £142.1 million (2016: £106.9 million, 2015: £64.0 million) of other pass-through costs.

In 2017, operating profit includes credits totalling £44.8 million (2016: £26.3 million, 2015: £31.6 million) relating to the release of excess provisions and other balances established in respect of acquisitions completed prior to 2016. Further details of the Group’s approach to acquisition reserves, as required by IFRS 3 Business Combinations, are given in note 28.

Investment write-downs of £95.9 million (2016: £86.1 million, 2015: £78.7 million) include £53.1 million in relation to comScore Inc, which had not released any financial statements in relation to its 2015, 2016 or 2017 results due to an internal investigation by their Audit Committee. In 2017, the market value of comScore Inc fell below the Group’s carrying value. Other investment write-downs relate to certain non-core minority investments in the US where forecast financial performance and/or liquidity issues indicate a permanent decline in the recoverability of the Group’s investment.

Gains on disposal of investments and subsidiaries of £129.0 million in 2017 (2016: £44.3 million, 2015: £131.0 million) include £92.3 million of gains arising on the sale of the Group’s equity interest in Asatsu-DK Inc following its acquisition by Bain Capital.

F-16

3. Costs of services and general administrative costs (continued)

Notes to the consolidated financial statements (continued)

In 2016, gains on remeasurement of equity interests arising from a change in scope of ownership of £232.4 million primarily comprise gains in relation to the reclassification of the Group’s interest in the Imagina Group in Spain from other investments to interests in associates, resulting from WPP attaining significant influence in the period. In 2015, gains on remeasurement of equity interests arising from a change in scope of ownership of £165.0 million primarily comprise gains in relation to the acquisition of a majority stake in IBOPE in Latin America.

In 2017, restructuring costs of £56.8 million (2016: £27.4 million; 2015: £106.2 million) predominantly comprise £33.7 million (2016: £nil; 2015: £69.5 million) of severance costs arising from a structural assessment of certain of the Group’s operations, primarily in the mature markets; and £12.8 million (2016: £27.4 million, 2015: £36.7 million) of costs resulting from the project to transform and rationalise the Group’s IT services and infrastructure including costs relating to the cyber attack in June 2017.

Auditors’ remuneration:

	2017 £m		2016 £m		2015 £m
Fees payable to the Company’s auditors for the audit of the Company’s annual accounts		1.4		1.4		1.5
The audit of the Company’s subsidiaries pursuant to legislation		20.7		19.4		16.2
		22.1		20.8		17.7
Other services pursuant to legislation		4.0		3.7		3.3
Fees payable to the auditors pursuant to legislation		26.1		24.5		21.0
Tax advisory services		0.1		1.6		1.8
Tax compliance services		0.1		1.3		1.0
		0.2		2.9		2.8
Corporate finance services		–		0.1		0.2
Other services1		4.6		5.7		6.5
Total non-audit fees		4.8		8.7		9.5
Total fees		30.9		33.2		30.5

Note

¹  Other services include audits for earnout purposes.

Minimum committed annual rentals

Amounts payable in 2018 under leases will be as follows:

	Plant and machinery						Land and buildings
	2018 £m		2017 £m		2016 £m		2018 £m		2017 £m		2016 £m
In respect of operating leases which expire:
– within one year		5.1		4.0		4.3		88.6		85.1		57.6
– within two to five years		10.8		10.5		9.7		236.2		287.9		240.3
– after five years		0.1		–		0.3		207.8		187.0		163.1
		16.0		14.5		14.3		532.6		560.0		461.0

Future minimum annual amounts payable under all lease commitments in existence at 31 December 2017 are as follows:

	Minimum rental payments £m		Less sub- let rentals £m			Net payment £m
Year ending 31 December
2018		548.6		(18.6	)		530.0
2019		469.0		(6.5	)		462.5
2020		412.9		(4.2	)		408.7
2021		349.1		(2.4	)		346.7
2022		298.3		(2.1	)		296.2
Later years		1,816.0		(2.6	)		1,813.4
		3,893.9		(36.4	)		3,857.5

4. Share of results of associates

Share of results of associates include:

	2017 £m			2016 £m			2015 £m
Share of profit before interest and taxation		145.1			97.1			95.2
Share of exceptional gains/(losses)		0.8			(15.2	)		(21.8	)
Share of interest and non-controlling interests		(7.8	)		(4.7	)		(1.7	)
Share of taxation		(24.6	)		(27.4	)		(24.7	)
		113.5			49.8			47.0

5. Our people

Our staff numbers averaged 134,428 for the year ended 31 December 2017 against 132,657 in 2016 and 124,930 in 2015. Their geographical distribution was as follows:

	2017		2016		2015
North America		27,399		27,246		26,224
UK		14,197		14,070		13,401
Western Continental Europe		25,700		24,996		23,506
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		67,132		66,345		61,799
		134,428		132,657		124,930

Their operating sector distribution was as follows:

	2017		2016		2015
Advertising and Media Investment Management		56,789		55,120		53,227
Data Investment Management		28,629		29,279		28,395
Public Relations & Public Affairs		9,082		9,054		8,492
Brand Consulting, Health & Wellness and Specialist Communications		39,928		39,204		34,816
		134,428		132,657		124,930

At the end of 2017, staff numbers were 134,413 (2016: 134,341, 2015: 128,123). Including all employees of associated undertakings, this figure was approximately 203,000 at 31 December 2017 (2016: 198,000, 2015: 190,000).

Staff costs include:

	2017 £m		2016 £m		2015 £m
Wages and salaries		5,832.3		5,395.6		4,578.4
Cash-based incentive plans		219.2		260.2		231.8
Share-based incentive plans (note 22)		105.0		106.5		99.0
Social security costs		720.3		658.1		578.4
Pension costs (note 23)		192.0		178.1		160.0
Severance		39.5		34.5		24.0
Other staff costs1		1,210.7		1,151.9		981.0
		8,319.0		7,784.9		6,652.6

Note

¹ Freelance and temporary staff costs are included in other staff costs.

Included above are charges of £12.3 million (2016: £15.5 million, 2015: £16.7 million) for share-based incentive plans in respect of key management personnel (who comprise the directors of the Group). Total compensation received by key management personnel in respect of 2017 was £17.8 million (2016: £57.5 million, 2015: £84.2 million) of which £0.7 million (2016: £0.7 million, 2015: £0.7 million) were pension contributions. The value of the EPSP awards, which vest in the year following the end of the five-year performance period, is included in total compensation in the year the relevant five-year performance period ends.

F-17

Notes to the consolidated financial statements (continued)

6. Finance income, finance costs and revaluation of financial instruments

Finance income includes:

	2017 £m		2016 £m		2015 £m
Income from available for sale investments		16.8		12.5		18.9
Interest income		78.4		67.9		53.5
		95.2		80.4		72.4

Finance costs include:

	2017 £m		2016 £m		2015 £m
Net interest expense on pension plans (note 23)		6.3		6.7		7.3
Interest on other long-term employee benefits		3.9		2.7		2.5
Interest expense and similar charges1		259.6		245.1		214.3
		269.8		254.5		224.1

Revaluation of financial instruments² include:

	2017 £m		2016 £m			2015 £m
Movements in fair value of treasury instruments		1.1		(19.5	)		(3.7	)
Movements in fair value of other derivatives		–		–			15.9
Revaluation of put options over non-controlling interests		52.5		(17.2	)		(11.3	)
Revaluation of payments due to vendors (earnout agreements)		208.6		(11.6	)		(35.6	)
		262.2		(48.3	)		(34.7	)

Notes

¹  Interest expense and similar charges are payable on bank overdrafts, bonds and bank loans held at amortised cost.

²  Financial instruments are held at fair value through profit and loss.

The majority of the Group’s long-term debt is represented by $2,862 million of US dollar bonds at an average interest rate of 4.48%, €3,202 million of Eurobonds at an average interest rate of 1.71% and £600 million of Sterling bonds at an average interest rate of 4.04%.

Average borrowings under the US Dollar Revolving Credit Facilities (note 10) amounted to the equivalent of $715 million at an average interest rate of 0.78% (2016: $109 million at an average interest rate of 0.82%).

Average borrowings under the Australian dollar Revolving Credit Facilities, amounted to A$412 million at an average rate of 3.24% (2016: A$336 million at an average interest rate of 3.69%).

Average borrowings under the US Commercial Paper Program for 2017 amounted to $860 million at an average interest rate of 1.47% inclusive of margin (2016: $293 million at an average interest rate of 0.75%).

7. Taxation

In 2017, the effective tax rate on profit before taxation was 9.3% (2016: 20.6%, 2015: 16.6%)

On 22 December 2017, The Tax Cuts and Jobs Act was enacted in the US which reduced the federal tax rate from 35% to 21% from 1 January 2018. This revised rate has been used to revalue deferred tax assets and liabilities, leading to a non-cash credit to the income statement of £234.1 million, partially offset by a one-time deemed repatriation tax charge related to unremitted foreign earnings of £28.1 million, payable over eight years.

The tax charge comprises:

	2017 £m		2016 £m			2015 £m
Corporation tax
Current year		523.4		569.4			403.0
Prior years		(98.6)		(80.3	)		(108.4	)
		424.8		489.1			294.6
Deferred tax
Current year		(235.2)		(88.0	)		(35.8	)
Prior years		7.4		(12.2	)		(11.3	)
		(227.8)		(100.2	)		(47.1	)
Tax charge		197.0		388.9			247.5

The corporation tax credit for prior years in 2017, in 2016 and 2015, mainly comprises the release of a number of provisions following the resolution of tax matters in various countries.

7. Taxation (continued)

The tax charge for the year can be reconciled to profit before taxation in the consolidated income statement as follows:

	2017 £m		2016 £m			2015 £m
Profit before taxation		2,109.3		1,890.5			1,492.6
Tax at the corporation tax rate of 19.25%1		406.0		378.1			302.3
Tax effect of share of results of associates		(21.8)		(10.0	)		(9.5	)
Irrecoverable withholding taxes		37.0		36.3			25.7
Items that are not deductible/(taxable) in determining taxable profit		(3.9)		9.4			25.4
Effect of different tax rates in subsidiaries operating in other jurisdictions		140.3		60.4			49.9
US Transition Tax related to unremitted foreign earnings		28.1		–			–
Effect of change in US tax rate on deferred tax balances		(234.1)		–			–
Origination and reversal of unrecognised temporary differences		(17.2)		(4.3	)		0.4
Tax losses not recognised or utilised in the year		32.5		52.2			4.0
Utilisation of tax losses not previously recognised		(10.4)		(11.3	)		(10.4	)
Recognition of temporary differences not previously recognised		(68.3)		(29.4	)		(20.6	)
Net release of prior year provisions in relation to acquired businesses		(15.0)		(23.3	)		(22.9	)
Other prior year adjustments		(76.2)		(69.2	)		(96.8	)
Tax charge		197.0		388.9			247.5
Effective tax rate on profit before tax		9.3%		20.6	%		16.6	%

Note

¹  The parent company of the Group is tax resident in the UK. As such, the tax rate in the tax reconciliation for 2017 is the UK corporation tax rate of 19.25% (2016: 20%, 2015: 20.25%).

Factors affecting the tax charge in future years

Given the Group’s geographic mix of profits and the changing international tax environment, the tax rate is expected to increase slightly over the next few years.

Factors that may affect the Group’s future tax charge include the levels and mix of profits in the many countries in which we operate, the prevailing tax rates in each of those countries and also the foreign exchange rates that apply to those profits. The tax charge may also be affected by the impact of acquisitions, disposals and other corporate restructurings, the resolution of open tax issues, future planning, and the ability to use brought forward tax losses. Furthermore, changes in local or international tax rules, for example prompted by the OECD’s Base Erosion and Profit Shifting project (a global initiative to improve the fairness and integrity of tax systems), or new challenges by tax or competition authorities, for example, the European Commission’s state aid investigation into Group Financing Exemption in the UK CFC rules announced in October 2017, may expose us to additional tax liabilities or impact the carrying value of our deferred tax assets, which would affect the future tax charge.

The Group has a number of open tax returns and various ongoing tax audits worldwide but does not currently expect material additional tax exposures to arise, above the amounts provided, as and when the audits are concluded. Liabilities relating to these open and judgemental matters are based upon estimates of whether additional taxes will be due after taking into account external advice where appropriate. Where the final tax outcome of these matters is different from the amounts which were initially recorded then such differences will impact the current and deferred income tax assets and liabilities in the period in which such determination is made.

Tax risk management

We maintain constructive engagement with the tax authorities and relevant government representatives, as well as active engagement with a wide range of international companies and business organisations with similar issues. We engage advisors and legal counsel to obtain opinions on tax legislation and principles. We have a Tax Risk Management Strategy in place which sets out the controls established and our assessment procedures for decision-making and how we monitor tax risk. We monitor proposed changes in taxation legislation and ensure these are taken into account when we consider our future business plans. Our directors are informed by management of any tax law changes, the nature and status of any significant ongoing tax audits, and other developments that could materially affect the Group’s tax position.

F-18

Notes to the consolidated financial statements (continued)

8. Ordinary dividends

Amounts recognised as distributions to equity holders in the year:

	2017		2016		2015		2017		2016		2015
Per share	Pence per share						£m		£m		£m
2016 Final dividend		37.05p		28.78p		26.58p		467.2		368.5		343.2
2017 Interim dividend		22.70p		19.55p		15.91p		284.3		248.0		202.6
		59.75p		48.33p		42.49p		751.5		616.5		545.8

Proposed final dividend for the year ended 31 December 2017:

	2017		2016		2015
Per share	Pence per share
Final dividend		37.30p		37.05p		28.78p

The payment of dividends will not have any tax consequences for the Group.

9. Earnings per share

Basic EPS

The calculation of basic EPS is as follows:

	2017			2016			2015
Earnings1 (£m)		1,816.6			1,400.1			1,160.2
Average shares used in basic EPS calculation (m)		1,261.1			1,277.8			1,288.5
EPS		144.0	p		109.6	p		90.0	p

Note

¹  Earnings is equivalent to profit for the year attributable to equity holders of the parent.

Diluted EPS

The calculation of diluted EPS is as follows:

	2017			2016			2015
Diluted earnings (£m)		1,816.6			1,400.1			1,160.2
Average shares used in diluted EPS calculation (m)		1,275.8			1,296.0			1,313.0
Diluted EPS		142.4	p		108.0	p		88.4	p

Diluted EPS has been calculated based on the diluted earnings amounts above. At 31 December 2017, options to purchase 8.2 million ordinary shares (2016: 8.4 million, 2015: 7.0 million) were outstanding, but were excluded from the computation of diluted earnings per share because the exercise prices of these options were greater than the average market price of the Group’s shares and, therefore, their inclusion would have been accretive.

A reconciliation between the shares used in calculating basic and diluted EPS is as follows:

	2017 m		2016 m		2015 m
Average shares used in basic EPS calculation		1,261.1		1,277.8		1,288.5
Dilutive share options outstanding		1.8		2.4		3.5
Other potentially issuable shares		12.9		15.8		21.0
Shares used in diluted EPS calculation		1,275.8		1,296.0		1,313.0

At 31 December 2017 there were 1,332,511,552 (2016: 1,331,880,730, 2015: 1,329,366,024) ordinary shares in issue.

10. Sources of finance

The following table summarises the equity and debt financing of the Group, and changes during the year:

			Shares					Debt
	2017 £m		2016 £m		2017 £m			2016 £m
Analysis of changes in financing
Beginning of year		695.4		668.2		6,033.1			5,157.4
Ordinary shares issued		6.4		27.2		–			–
Net increase/(decrease) in drawings on bank loans and corporate bonds		–		–		599.6			(22.5	)
Amortisation of financing costs included in net debt		–		–		8.0			9.0
Debt acquired		–		–		–			144.4
Other movements		–		–		(6.9	)		(13.1	)
Exchange adjustments		–		–		(152.5	)		757.9
End of year		701.8		695.4		6,481.3			6,033.1

Note

The table above excludes bank overdrafts which fall within cash and cash equivalents for the purposes of the consolidated cash flow statement.

Shares

At 31 December 2017, the Company’s share base was entirely composed of ordinary equity share capital and share premium of £701.8 million (2016: £695.4 million), further details of which are disclosed in note 26.

Debt

US$ bonds The Group has in issue $812 million of 4.75% bonds due November 2021, $500 million of 3.625% bonds due September 2022, $750 million of 3.75% bonds due September 2024, $300 million of 5.125% bonds due September 2042 and $500 million of 5.625% bonds due November 2043.

Eurobonds The Group has in issue €252 million of 0.43% bonds due March 2018, €600 million of 0.75% bonds due November 2019, €750 million of 3% bonds due November 2023, €750 million of 2.25% bonds due September 2026 and €600 million of 1.625% bonds due March 2030. In May 2017, the Group issued €250 million of Floating Rate Notes carrying a coupon of 3m EURIBOR + 0.32% due May 2020.

In March 2018, the Group issued €500 million of 1.375% bonds due March 2025 and €250 million of Floating Rate Notes carrying a coupon of 3m EURIBOR + 0.45% due March 2022.

Sterling bonds The Group has in issue £200 million of 6.375% bonds due November 2020 and £400 million of 2.875% bonds due September 2046.

Revolving Credit Facility The Group has a five-year Revolving Credit Facility of $2.5 billion due July 2021. The Group’s borrowing under these facilities, which are drawn down predominantly in US dollars and pounds sterling, averaged the equivalent of $715 million in 2017. The Group has a A$520 million Revolving Credit Facility due April 2019. The Group’s borrowings under the Australian dollar facilities which were drawn down in Australian dollars and New Zealand dollars, averaged the equivalent of A$412 million in 2017. The Group had available undrawn committed credit facilities of £1,163.8 million at December 2017 (2016: £2,122.3 million).

Borrowings under the $2.5 billion Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of the Group. Borrowings under the A$520 million Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of WPP AUNZ.

US Commercial Paper Program

The Group operates a commercial paper program using its Revolving Credit Facility as a backstop. The average commercial paper outstanding in 2017 was $860.0 million. The US Commercial Paper outstanding at 31 December 2017 was $1,069 million.

F-19

10. Sources of finance (continued)

Notes to the consolidated financial statements (continued)

The following table is an analysis of future anticipated cash flows in relation to the Group’s debt, on an undiscounted basis which, therefore, differs from the fair value and carrying value:

	2017 £m			2016 £m
Within one year		(391.7	)		(582.9	)
Between one and two years		(896.3	)		(389.5	)
Between two and three years		(584.3	)		(893.0	)
Between three and four years		(1,537.8	)		(369.1	)
Between four and five years		(487.9	)		(812.9	)
Over five years		(4,519.1	)		(5,144.7	)
Debt financing (including interest) under the Revolving Credit Facility and in relation to unsecured loan notes		(8,417.1	)		(8,192.1	)
Short-term overdrafts – within one year		(393.2	)		(534.3	)
Future anticipated cash flows		(8,810.3	)		(8,726.4	)
Effect of discounting/financing rates		1,935.8			2,159.0
Debt financing		(6,874.5	)		(6,567.4	)

Analysis of fixed and floating rate debt by currency including the effect of interest rate and cross-currency swaps:

2017 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,146.1		4.62%		n/a		199
	– floating		1,760.9		n/a		LIBOR		n/a
£	– fixed		600.0		4.04%		n/a		245
€	– fixed		2,623.9		1.85%		n/a		80
	– floating		222.2		n/a		EURIBOR		n/a
Other			128.2		n/a		n/a		n/a
			6,481.3

2016 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,255.6		4.62%		n/a		212
	– floating		1,063.1		n/a		LIBOR		n/a
£	– fixed		800.0		4.53%		n/a		193
	– floating		200.0		n/a		LIBOR		n/a
€	– fixed		2,521.9		1.85%		n/a		93
Other			192.5		n/a		n/a		n/a
			6,033.1

Note

¹  Weighted average. These rates do not include the effect of gains on interest rate swap terminations that are written to income over the life of the original instrument.

The following table is an analysis of future anticipated cash flows in relation to the Group’s financial derivatives, which include interest rate swaps, cash flow hedges and other foreign exchange swaps:

	Financial liabilities				Financial assets
2017	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		97.8		96.7		123.7		128.8
Between one and two years		21.4		20.1		38.6		38.8
Between two and three years		20.5		18.8		39.5		38.6
Between three and four years		20.7		18.6		851.7		851.0
Between four and five years		523.5		521.1		–		–
Over five years		–		–		–		–
		683.9		675.3		1,053.5		1,057.2

	Financial liabilities				Financial assets
2016	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		183.2		183.0		282.5		302.2
Between one and two years		19.2		20.6		51.7		55.4
Between two and three years		18.8		18.1		57.5		58.5
Between three and four years		20.0		18.1		61.2		60.5
Between four and five years		20.7		18.1		1,687.3		1,686.1
Over five years		521.3		518.1		–		–
		783.2		776.0		2,140.2		2,162.7

F-20

10. Sources of finance (continued)

Notes to the consolidated financial statements (continued)

11. Analysis of cash flows

The following tables analyse the items included within the main cash flow headings on page F-11.

Net cash from operating activities:

	2017 £m			2016 £m			2015 £m
Profit for the year		1,912.3			1,501.6			1,245.1
Taxation		197.0			388.9			247.5
Revaluation of financial instruments		(262.2	)		48.3			34.7
Finance costs		269.8			254.5			224.1
Finance income		(95.2	)		(80.4	)		(72.4	)
Share of results of associates		(113.5	)		(49.8	)		(47.0	)
Adjustments for:
Non-cash share-based incentive plans (including share options)		105.0			106.5			99.0
Depreciation of property, plant and equipment		230.7			220.8			194.7
Impairment of goodwill		27.1			27.0			15.1
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Amortisation of other intangible assets		36.3			38.6			33.7
Investment write-downs		95.9			86.1			78.7
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Losses on sale of property, plant and equipment		1.1			0.8			1.1
(Increase)/decrease in inventories and work in progress		(44.6	)		(16.7	)		7.8
Increase in trade receivables and accrued income		(45.8	)		(53.7	)		(882.7	)
(Decrease)/increase in trade payables and deferred income		(170.8	)		188.7			713.4
(Increase)/decrease in other receivables		(110.6	)		77.4			(39.0	)
(Decrease)/increase in other payables – short term		(122.8	)		(303.7	)		74.5
Increase in other payables – long-term		20.1			4.5			24.2
Decrease in provisions		(57.3	)		(47.8	)		(62.3	)
Corporation and overseas tax paid		(424.7	)		(414.2	)		(301.2	)
Interest and similar charges paid		(246.6	)		(242.1	)		(212.0	)
Interest received		76.9			73.9			61.3
Investment income		16.8			12.5			4.9
Dividends from associates		46.8			60.4			72.6
Net cash inflow from operating activities		1,408.1			1,773.8			1,359.9

Acquisitions and disposals:

	2017 £m			2016 £m			2015 £m
Initial cash consideration		(214.8	)		(424.1	)		(463.5	)
Cash and cash equivalents acquired (net)		28.9			57.3			57.7
Earnout payments		(199.1	)		(92.3	)		(43.9	)
Purchase of other investments (including associates)		(92.5	)		(260.2	)		(283.2	)
Proceeds on disposal of investments and subsidiaries		296.0			80.5			63.4
Acquisitions and disposals		(181.5	)		(638.8	)		(669.5	)
Cash consideration for non-controlling interests		(47.3	)		(58.3	)		(23.6	)
Net cash outflow		(228.8	)		(697.1	)		(693.1	)
Share repurchases and buy-backs:
	2017 £m			2016 £m			2015 £m
Purchase of own shares by ESOP Trusts	(214.6)			(152.9)			(181.6)
Shares purchased into treasury		(289.6	)		(274.5	)		(406.0	)
Net cash outflow		(504.2	)		(427.4	)		(587.6	)
Net increase/(decrease) in borrowings:
	2017 £m			2016 £m			2015 £m
Proceeds from issue of €250 million bonds	214.0			–			–
Repayment of £400 million bonds		(400.0	)		–			–
Proceeds from issue of £400 million bonds	–			400.0			–
Repayment of €498 million bonds		–			(392.1	)		–
Proceeds from issues of €600 million bonds		–			–			858.7
Repayment of €500 million bonds		–			–			(481.9	)
Premium on exchange of €252 million bonds		–			–			(13.7	)
Increase/(decrease) in drawings on bank loans		785.6			(30.4	)		128.9
Net cash inflow/(outflow)		599.6			(22.5	)		492.0
Cash and cash equivalents:
	2017 £m			2016 £m			2015 £m
Cash at bank and in hand		2,049.6			2,256.2			2,227.8
Short-term bank deposits		341.8			180.7			154.6
Overdrafts1		(393.2	)		(534.3	)		(435.8	)
		1,998.2			1,902.6			1,946.6

Note

¹  Bank overdrafts are included in cash and cash equivalents because they form an integral part of the Group’s cash management.

The Group considers that the carrying amount of cash and cash equivalents approximates their fair value.

F-21

11. Analysis of cash flows (continued)

Notes to the consolidated financial statements (continued)

12. Intangible assets

Goodwill

The movements in 2017 and 2016 were as follows:

	£m
Cost:
1 January 2016		11,294.2
Additions1		796.6
Revision of earnout estimates		28.4
Exchange adjustments		1,820.2
31 December 2016		13,939.4
Additions1		301.0
Revision of earnout estimates		(60.7	)
Exchange adjustments		(504.4	)
31 December 2017		13,675.3
Accumulated impairment losses and write-downs:
1 January 2016		623.6
Impairment losses for the year		20.0
Exchange adjustments		81.5
31 December 2016		725.1
Impairment losses for the year		27.1
Exchange adjustments		(29.8	)
31 December 2017		722.4
Net book value:
31 December 2017		12,952.9
31 December 2016		13,214.3
1 January 2016		10,670.6

Note

¹  Additions represent goodwill arising on the acquisition of subsidiary undertakings including the effect of any revisions to fair value adjustments that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations. The effect of such revisions was not material in either year presented. Goodwill arising on the acquisition of associate undertakings is shown within interests in associates and joint ventures in note 14.

Cash-generating units with significant goodwill as at 31 December are:

	2017 £m		2016 £m
GroupM		2,906.7		2,966.2
Kantar		2,518.2		2,573.0
Wunderman		1,514.5		1,297.1
Y&R Advertising		1,091.8		1,140.3
Burson-Marsteller		557.6		590.3
Other		4,364.1		4,647.4
Total goodwill		12,952.9		13,214.3

Other goodwill represents goodwill on a large number of cash-generating units, none of which is individually significant in comparison to the total carrying value of goodwill.

Other intangible assets

The movements in 2017 and 2016 were as follows:

	Brands with an indefinite useful life £m			Acquired intangibles £m			Other £m			Total £m
Cost:
1 January 2016		968.1			2,007.1			331.0			3,306.2
Additions		–			–			33.0			33.0
Disposals		–			(0.8	)		(42.2	)		(43.0	)
New acquisitions		–			319.1			10.5			329.6
Other movements1		–			11.6			4.7			16.3
Exchange adjustments		173.2			198.5			67.1			438.8
31 December 2016		1,141.3			2,535.5			404.1			4,080.9
Additions		–			–			37.3			37.3
Disposals		–			–			(15.8	)		(15.8	)
New acquisitions		–			79.0			0.8			79.8
Other movements1		–			6.4			7.2			13.6
Exchange adjustments		(60.0	)		(73.1	)		(22.1	)		(155.2	)
31 December 2017		1,081.3			2,547.8			411.5			4,040.6
Amortisation and impairment:
1 January 2016		–			1,339.5			251.3			1,590.8
Charge for the year		–			163.3			38.6			201.9
Disposals		–			(0.4	)		(39.5	)		(39.9	)
Other movements		–			–			2.0			2.0
Exchange adjustments		–			60.6			48.2			108.8
31 December 2016		–			1,563.0			300.6			1,863.6
Charge for the year		–			189.4			36.3			225.7
Disposals		–			–			(14.9	)		(14.9	)
Other movements		–			–			2.5			2.5
Exchange adjustments		–			(33.7	)		(21.0	)		(54.7	)
31 December 2017		–			1,718.7			303.5			2,022.2
Net book value:
31 December 2017		1,081.3			829.1			108.0			2,018.4
31 December 2016		1,141.3			972.5			103.5			2,217.3
1 January 2016		968.1			667.6			79.7			1,715.4

Note

¹  Other movements in acquired intangibles include revisions to fair value adjustments arising on the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

Brands with an indefinite life are carried at historical cost in accordance with the Group’s accounting policy for intangible assets. The carrying values of the separately identifiable brands are not individually significant in comparison with the total carrying value of brands with an indefinite useful life.

Acquired intangible assets at net book value at 31 December 2017 include brand names of £445.6 million (2016: £486.2 million), customer-related intangibles of £360.9 million (2016: £448.9 million), and other assets (including proprietary tools) of £22.6 million (2016: £37.4 million).

The total amortisation and impairment of acquired intangible assets of £195.1 million (2016: £168.4 million) includes £5.7 million (2016: £5.1 million) in relation to associates.

In accordance with the Group’s accounting policy, the carrying values of goodwill and intangible assets with indefinite useful lives are reviewed for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.

The impairment review is undertaken annually on 30 September. The review assessed whether the carrying value of goodwill and intangible assets with indefinite useful lives was supported by the net present value of future cash flows, using a pre-tax discount rate of 8.5% (2016: 8.5%) and management forecasts for a projection period of up to five years, followed by an assumed annual long-term growth rate of 3.0% (2016: 3.0%) and no assumed improvement in operating margin. Management have made the judgement that this long-term growth rate does not exceed the long-term average growth rate for the industry.

F-22

12. Intangible assets (continued)

Notes to the consolidated financial statements (continued)

12. Intangible assets (continued)

The goodwill impairment charge of £27.1 million (2016: £27.0 million) relates to a number of under-performing businesses in the Group, of which £nil (2016: £7.0 million) is in relation to associates. In certain markets, the impact of local economic conditions and trading circumstances on these businesses was sufficiently severe to indicate impairment to the carrying value of goodwill.

Under IFRS, an impairment charge is required for both goodwill and other indefinite-lived assets when the carrying amount exceeds the ‘recoverable amount’, defined as the higher of fair value less costs to sell and value in use.

Our approach in determining the recoverable amount utilises a discounted cash flow methodology, which necessarily involves making numerous estimates and assumptions regarding revenue growth, operating margins, appropriate discount rates and working capital requirements. The key assumptions used for estimating cash flow projections in the Group’s impairment testing are those relating to revenue growth and operating margin. The key assumptions take account of the businesses’ expectations for the projection period. These expectations consider the macroeconomic environment, industry and market conditions, the unit’s historical performance and any other circumstances particular to the unit, such as business strategy and client mix.

These estimates will likely differ from future actual results of operations and cash flows, and it is possible that these differences could be material. In addition, judgements are applied in determining the level of cash-generating unit identified for impairment testing and the criteria used to determine which assets should be aggregated. A difference in testing levels could affect whether an impairment is recorded and the extent of impairment loss. Changes in our business activities or structure may also result in changes to the level of testing in future periods. Further, future events could cause the Group to conclude that impairment indicators exist and that the asset values associated with a given operation have become impaired. Any resulting impairment loss could have a material impact on the Group’s financial condition and results of operations.

Historically our impairment losses have resulted from a specific event, condition or circumstance in one of our companies, such as the loss of a significant client. As a result, changes in the assumptions used in our impairment model have not had a significant effect on the impairment charges recognized. Burson-Marsteller is the only cash-generating unit with significant goodwill where a reasonably possible change in a key assumption on which the recoverable amount is based would cause the carrying amount to exceed its recoverable amount. The methodology above indicated an amount of £36.7 million as the excess of recoverable amount over carrying amount at 30 September 2017, with no further indicators of impairment by year-end. As announced in February 2018, Burson-Marsteller and Cohn & Wolfe were merged to create Burson Cohn & Wolfe, one of the world’s largest, full-service, global communications agencies. In accordance with IAS 36, this Group reorganisation was not taken account of in the impairment testing at 30 September 2017. Going forward, the respective goodwill for these cash-generating units will be aggregated and tested for impairment on a combined basis, aligning with the way in which the Group will monitor goodwill internally following the reorganisation. If these units had been tested in combination as of 30 September 2017, with all other inputs held constant, a reasonably possible change in assumptions for the Burson Cohn & Wolfe cash-generating unit would not cause the carrying amount to exceed the recoverable amount.

The carrying value of goodwill and other intangible assets will continue to be reviewed at least annually for impairment and adjusted down to the recoverable amount if required.

13. Property, plant and equipment

The movements in 2017 and 2016 were as follows:

	Land £m		Freehold buildings £m			Leasehold buildings £m			Fixtures, fittings and equipment £m			Computer equipment £m			Total £m
Cost:
1 January 2016		37.1		102.2			837.4			338.3			602.9			1,917.9
Additions		–		1.3			107.9			55.9			87.0			252.1
New acquisitions		–		–			7.9			6.5			6.2			20.6
Disposals		–		(0.3	)		(83.2	)		(46.1	)		(106.4	)		(236.0	)
Exchange adjustments		–		23.2			142.5			48.0			153.7			367.4
31 December 2016		37.1		126.4			1,012.5			402.6			743.4			2,322.0
Additions		–		4.3			165.0			31.7			87.9			288.9
New acquisitions		–		–			2.0			2.4			1.1			5.5
Disposals		–		(1.2	)		(46.1	)		(40.7	)		(54.6	)		(142.6	)
Exchange adjustments		–		(10.7	)		(51.6	)		(18.8	)		(74.8	)		(155.9	)
31 December 2017		37.1		118.8			1,081.8			377.2			703.0			2,317.9
Depreciation:
1 January 2016		–		19.2			423.2			208.9			468.9			1,120.2
Charge for the year		–		4.3			81.1			45.7			89.7			220.8
Disposals		–		(0.6	)		(77.8	)		(49.2	)		(101.4	)		(229.0	)
Exchange adjustments		–		2.3			83.3			34.6			121.1			241.3
31 December 2016		–		25.2			509.8			240.0			578.3			1,353.3
Charge for the year		–		6.9			86.7			47.0			90.1			230.7
Disposals		–		(1.9	)		(42.6	)		(35.9	)		(54.4	)		(134.8	)
Exchange adjustments		–		(1.7	)		(27.8	)		(14.2	)		(67.1	)		(110.8	)
31 December 2017		–		28.5			526.1			236.9			546.9			1,338.4
Net book value:
31 December 2017		37.1		90.3			555.7			140.3			156.1			979.5
31 December 2016		37.1		101.2			502.7			162.6			165.1			968.7
1 January 2016		37.1		83.0			414.2			129.4			134.0			797.7

At the end of the year, capital commitments contracted, but not provided for in respect of property, plant and equipment were £137.2 million (2016: £22.1 million). The increase is due to a number of significant property developments in North America.

F-23

Notes to the consolidated financial statements (continued)

14. Interests in associates, joint ventures and other investments

The movements in 2017 and 2016 were as follows:

	Net assets of associates and joint ventures £m			Goodwill and other intangibles of associates and joint ventures £m			Total associates and joint ventures £m			Other investments £m
1 January 2016		334.1			424.5			758.6			1,158.7
Additions		(1.3	)		–			(1.3	)		233.5
Goodwill arising on acquisition of new associates		–			292.2			292.2			–
Share of results of associate undertakings (note 4)		49.8			–			49.8			–
Dividends		(60.4	)		–			(60.4	)		–
Other movements		(45.3	)		52.4			7.1			–
Reclassification from other investments to associates		43.6			30.7			74.3			(74.3	)
Exchange adjustments		61.6			50.1			111.7			170.4
Disposals		(12.7	)		–			(12.7	)		(3.4	)
Reclassification to subsidiaries		(44.2	)		(88.8	)		(133.0	)		(0.2	)
Revaluation of other investments		–			–			–			(93.1	)
Amortisation of other intangible assets		–			(5.1	)		(5.1	)		–
Goodwill impairment		–			(7.0	)		(7.0	)		–
Write-downs		(4.8	)		–			(4.8	)		(81.3	)
31 December 2016		320.4			749.0			1,069.4			1,310.3
Additions		34.1			–			34.1			67.7
Goodwill arising on acquisition of new associates		–			0.4			0.4			–
Share of results of associate undertakings (note 4)		113.5			–			113.5			–
Dividends		(46.8	)		–			(46.8	)		–
Other movements		4.7			(1.3	)		3.4			–
Reclassification from other investments to associates		57.1			–			57.1			(57.1	)
Exchange adjustments		(7.3	)		(3.3	)		(10.6	)		(106.1	)
Disposals		(59.2	)		(79.9	)		(139.1	)		(1.7	)
Reclassification to subsidiaries		(3.4	)		(2.9	)		(6.3	)		–
Revaluation of other investments		–			–			–			32.1
Amortisation of other intangible assets		–			(5.7	)		(5.7	)		–
Write-downs		(4.2	)		–			(4.2	)		(91.7	)
31 December 2017		408.9			656.3			1,065.2			1,153.5

The investments included above as ‘other investments’ represent investments in equity securities that present the Group with opportunity for return through dividend income and trading gains. They have no fixed maturity or coupon rate. The fair values of the listed securities are based on quoted market prices.

For unlisted securities, where market value is not available, the Group has estimated relevant fair values on the basis of publicly available information from outside sources.

The carrying values of the Group’s associates and joint ventures are reviewed for impairment in accordance with the Group’s accounting policies.

14. Interests in associates, joint ventures and other investments (continued)

The Group’s principal associates and joint ventures at 31 December 2017 included:

	% owned		Country of incorporation
Barrows Design and Manufacturing (Pty) Limited		35.0		South Africa
Bruin Sports Capital LLC		38.2		USA
Chime Communications Ltd		24.9		UK
CVSC Sofres Media Co Limited		40.0		China
GIIR Inc		30.0		Korea
Globant S.A.1		19.2		Argentina
Haworth Marketing & Media Company		49.0		USA
High Co SA		34.1		France
Imagina		23.5		Spain
Marktest Investimentos SGPS S.A.		43.1		Portugal
Richard Attias and Associates		49.0		USA
Smollan Holdings (Pty) Ltd		24.8		South Africa

Note

¹Although the Group holds less than 20% of Globant S.A, it is considered to be an associate as the Group exercises significant influence over the entity.

The market value of the Group’s shares in its principal listed associate undertakings at 31 December 2017 was as follows: GIIR Inc: £35.4 million, Globant SA: £229.7 million and High Co SA: £33.3 million (2016: GIIR Inc: £26.9 million, Globant SA: £180.7 million and High Co SA: £21.0 million).

The carrying value (including goodwill and other intangibles) of these equity interests in the Group’s consolidated balance sheet at 31 December 2017 was as follows: GIIR Inc: £41.6 million, Globant SA: £76.4 million and High Co SA: £34.5 million (2016: GIIR Inc: £37.9 million, Globant SA: £78.5 million and High Co SA: £31.4 million).

Where the market value of the Group’s listed associates is less than the carrying value, an impairment review is performed utilising the discounted cash flow methodology discussed in note 12.

The Group’s investments in its principal associate undertakings are represented by ordinary shares.

F-24

Notes to the consolidated financial statements (continued)

14. Interests in associates, joint ventures and other investments (continued)

Summarised financial information

The following tables present a summary of the aggregate financial performance and net asset position of the Group’s associate undertakings and joint ventures. These have been estimated and converted, where appropriate, to an IFRS presentation based on information provided by the relevant companies at 31 December 2017.

	2017 £m			2016 £m			2015 £m
Income statement
Revenue		3,800.8			2,254.5			2,049.5
Operating profit		440.4			308.3			283.7
Profit before taxation		381.9			237.2			236.5
Profit for the year		312.5			156.7			162.0
	2017 £m			2016 £m			2015 £m
Balance sheet
Assets		3,192.9			4,223.1			3,912.4
Liabilities		(1,633.7	)		(1,900.0	)		(1,906.2	)
Net assets		1,559.2			2,323.1			2,006.2

The application of equity accounting is ordinarily discontinued when the investment is reduced to zero and additional losses are not provided for unless the Group has guaranteed obligations of the investee or is otherwise committed to provide further financial support for the investee.

At the end of the year, capital commitments contracted, but not provided for in respect of interests in associates and other investments were £54.2 million (2016: £89.2 million).

15. Deferred tax

The Group’s deferred tax assets and liabilities are measured at the end of each period in accordance with IAS 12 Income taxes. The recognition of deferred tax assets is determined by reference to the Group’s estimate of recoverability, using models where appropriate to forecast future taxable profits.

Deferred tax assets have only been recognised for territories where the Group considers that it is probable there would be sufficient taxable profits for the future deductions to be utilised.

15. Deferred tax (continued)

Based on available evidence, both positive and negative, we determine whether it is probable that all or a portion of the deferred tax assets will be realised. The main factors that we consider include:

– the future earnings potential determined through the use of internal forecasts;

– the cumulative losses in recent years;

– the various jurisdictions in which the potential deferred tax assets arise;

– the history of losses carried forward and other tax assets expiring;

– the timing of future reversal of taxable temporary differences;

– the expiry period associated with the deferred tax assets; and

– the nature of the income that can be used to realise the deferred tax asset.

If it is probable that some portion of these assets will not be realised, then no asset is recognised in relation to that portion.

If market conditions improve and future results of operations exceed our current expectations, our existing recognised deferred tax assets may be adjusted, resulting in future tax benefits. Alternatively, if market conditions deteriorate further or future results of operations are less than expected, future assessments may result in a determination that some or all of the deferred tax assets are not realisable. As a result, all or a portion of the deferred tax assets may need to be reversed.

F-25

Notes to the consolidated financial statements (continued)

15. Deferred tax (continued)

Certain deferred tax assets and liabilities have been offset as they relate to the same tax group. The following is the analysis of the deferred tax balances for financial reporting purposes:

	Gross 2017 £m			Offset 2017 £m			As reported 2017 £m			Gross 2016 £m			Offset 2016 £m			As reported 2016 £m
Deferred tax assets		411.8			(251.5	)		160.3			598.0			(457.6	)		140.4
Deferred tax liabilities		(765.2	)		251.5			(513.7	)		(1,150.0	)		457.6			(692.4	)
		(353.4	)		–			(353.4	)		(552.0	)		–			(552.0	)

The following are the major gross deferred tax assets recognised by the Group and movements thereon in 2017 and 2016:

	Deferred compensation £m			Accounting provisions & accruals £m			Retirement benefit obligations £m			Property, plant & equipment £m			Tax losses & credits £m			Share- based payments £m			Restructuring provisions £m			Other temporary differences £m			Total £m
1 January 2016		41.9			49.5			91.0			44.7			71.3			78.8			16.9			16.6			410.7
Acquisition of subsidiaries		–			7.1			–			–			–			0.2			–			15.0			22.3
Credit/(charge) to income		39.5			8.5			28.3			19.2			6.2			(1.8	)		(11.7	)		7.7			95.9
Credit to other comprehensive income		–			–			1.8			–			–			–			–			–			1.8
Charge to equity		–			–			–			–			–			(15.0	)		–			–			(15.0	)
Exchange differences		14.2			15.5			20.3			6.9			12.2			13.6			0.7			(1.1	)		82.3
31 December 2016		95.6			80.6			141.4			70.8			89.7			75.8			5.9			38.2			598.0
Acquisition of subsidiaries		–			–			–			–			–			–			–			2.6			2.6
(Charge)/credit to income		(5.5	)		6.6			(10.2	)		6.9			(34.4	)		(0.4	)		(1.5	)		(21.7	)		(60.2	)
Impact of US tax reform		(30.8	)		(8.1	)		(29.1	)		(6.8	)		23.1			(10.9	)		1.6			(1.1	)		(62.1	)
Charge to other comprehensive income		–			–			(20.9	)		–			–			–			–			–			(20.9	)
Charge to equity		–			–			–			–			–			(27.3	)		–			–			(27.3	)
Exchange differences		(5.8	)		5.8			(5.6	)		(2.5	)		(5.7	)		(4.2	)		(0.2	)		(0.1	)		(18.3	)
31 December 2017		53.5			84.9			75.6			68.4			72.7			33.0			5.8			17.9			411.8

Other temporary differences comprise a number of items including tax deductible goodwill, none of which is individually significant to the Group’s consolidated balance sheet. At 31 December 2017 the balance related to temporary differences in relation to revenue adjustments, tax deductible goodwill, fair value adjustments, and other temporary differences.

In addition the Group has recognised the following gross deferred tax liabilities and movements thereon in 2017 and 2016:

	Brands and other intangibles £m			Associate earnings £m			Goodwill £m			Property, plant & equipment £m			Financial instruments £m			Other temporary differences £m			Total £m
1 January 2016		577.1			22.5			176.7			30.9			50.7			11.0			868.9
Acquisition of subsidiaries		114.8			–			–			–			–			–			114.8
(Credit)/charge to income		(51.3	)		3.1			23.5			(0.4	)		3.5			17.3			(4.3	)
Charge to other comprehensive income		–			–			–			–			–			2.2			2.2
Exchange differences		115.3			2.7			32.3			5.7			9.8			2.6			168.4
31 December 2016		755.9			28.3			232.5			36.2			64.0			33.1			1,150.0
Acquisition of subsidiaries		21.4			–			–			–			–			–			21.4
(Credit)/charge to income		(49.9	)		(6.0	)		0.7			(0.5	)		(3.3	)		5.1			(53.9	)
Impact of US tax reform		(203.8	)		–			(76.3	)		(11.9	)		(22.2	)		18.0			(296.2	)
Charge to other comprehensive income		–			–			–			–			–			3.7			3.7
Exchange differences		(34.4	)		(0.7	)		(16.5	)		(2.6	)		(2.3	)		(3.3	)		(59.8	)
31 December 2017		489.2			21.6			140.4			21.2			36.2			56.6			765.2

At the balance sheet date, the Group has gross tax losses and other temporary differences of £4,709.2 million (2016: £5,153.2 million) available for offset against future profits. Deferred tax assets have been recognised in respect of the tax benefit of £1,539.3 million (2016: £1,104.4 million) of such tax losses and other temporary differences. No deferred tax asset has been recognised in respect of the remaining £3,169.9 million (2016: £4,048.8 million) of losses and other temporary differences as the Group considers that there will not be enough taxable profits in the entities concerned such that any additional asset could be considered recoverable. Included in the total unrecognised temporary differences are losses of £33.4 million that will expire within 1-10 years, and £2,945.2 million of losses that may be carried forward indefinitely.

At the balance sheet date, the aggregate amount of the temporary differences in relation to the investment in subsidiaries for which deferred tax liabilities have not been recognised was £3,898.0 million (2016: £3,270.8 million). No liability has been recognised in respect of these differences because the Group is in a position to control the timing of the reversal of the temporary differences and the Group considers that it is probable that such differences will not reverse in the foreseeable future.

F-26

Notes to the consolidated financial statements (continued)

16. Inventory and work in progress

The following are included in the net book value of inventory and work in progress:

	2017 £m		2016 £m
Work in progress		401.1		383.1
Inventory		23.2		17.3
		424.3		400.4

17. Trade and other receivables

The following are included in trade and other receivables:

Amounts falling due within one year:

	2017 £m		2016 £m
Trade receivables (net of bad debt provision)		7,889.7		8,054.2
VAT and sales taxes recoverable		202.3		157.2
Prepayments		298.3		310.0
Accrued income		3,211.7		3,353.8
Fair value of derivatives		1.0		14.7
Other debtors		509.3		484.6
		12,112.3		12,374.5

The ageing of trade receivables and other financial assets is as follows:

2017	Carrying amount at 31 December 2017 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days £m		91-180 days £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		7,889.7		5,466.6		1,629.6		577.0		143.0		48.8		24.7
Other financial assets		500.4		331.2		107.0		6.6		4.7		10.3		40.6
		8,390.1		5,797.8		1,736.6		583.6		147.7		59.1		65.3
2016	Carrying amount at 31 December 2016 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days £m		91-180 days £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		8,054.2		5,545.6		1,611.0		683.6		156.6		37.2		20.2
Other financial assets		504.5		335.0		91.3		16.3		6.7		11.9		43.3
		8,558.7		5,880.6		1,702.3		699.9		163.3		49.1		63.5

Other financial assets are included in other debtors.

Past due amounts are not impaired where collection is considered likely.

17. Trade and other receivables (continued)

Amounts falling due after more than one year:

	2017 £m		2016 £m
Prepayments		3.6		3.7
Accrued income		20.5		9.5
Fair value of derivatives		2.1		8.3
Other debtors		150.0		183.4
		176.2		204.9

Bad debt provisions:

	2017 £m			2016 £m			2015 £m
Balance at beginning of year		93.8			85.4			85.3
New acquisitions		1.2			1.8			1.0
Charged to operating costs		27.4			15.5			21.6
Exchange adjustments		(4.1	)		13.7			0.2
Utilisations and other movements		(27.0	)		(22.6	)		(22.7	)
Balance at end of year		91.3			93.8			85.4

The allowance for bad and doubtful debts is equivalent to 1.1% (2016: 1.2%, 2015: 1.2%) of gross trade accounts receivables.

The Group considers that the carrying amount of trade and other receivables approximates their fair value.

18. Trade and other payables: amounts falling due within one year

The following are included in trade and other payables falling due within one year:

	2017 £m		2016 £m
Trade payables		9,893.0		10,308.3
Deferred income		1,212.1		1,312.7
Payments due to vendors (earnout agreements)		180.7		277.5
Liabilities in respect of put option agreements with vendors		38.6		51.0
Fair value of derivatives		3.5		4.1
Other creditors and accruals		2,913.2		3,056.8
		14,241.1		15,010.4

The Group considers that the carrying amount of trade and other payables approximates their fair value.

19. Trade and other payables: amounts falling due after more than one year

The following are included in trade and other payables falling due after more than one year:

	2017 £m		2016 £m
Payments due to vendors (earnout agreements)		450.0		699.0
Liabilities in respect of put option agreements with vendors		219.5		246.0
Fair value of derivatives		3.3		1.8
Other creditors and accruals		320.0		327.0
		992.8		1,273.8

The Group considers that the carrying amount of trade and other payables approximates their fair value.

F-27

Notes to the consolidated financial statements (continued)

19. Trade and other payables: amounts falling due after more than one year (continued)

The following tables set out payments due to vendors, comprising contingent consideration and the directors’ best estimates of future earnout-related obligations:

	2017 £m			2016 £m
Within one year		180.7			277.5
Between one and two years		128.3			220.1
Between two and three years		144.1			170.2
Between three and four years		58.3			176.6
Between four and five years		103.1			122.4
Over five years		16.2			9.7
		630.7			976.5
	2017 £m			2016 £m
At beginning of year		976.5			581.3
Earnouts paid (note 11)		(199.1	)		(92.3	)
New acquisitions		163.7			359.5
Revision of estimates taken to goodwill (note 12)		(60.7	)		28.4
Revaluation of payments due to vendors (note 6)		(208.6	)		11.6
Exchange adjustments		(41.1	)		88.0
At end of year		630.7			976.5

As of 31 December 2017, the potential undiscounted amount of future payments that could be required under the earnout agreements for acquisitions completed in the current year and for all earnout agreements range from £nil to £228 million (2016: £nil to £453 million) and £nil to £1,910 million (2016: £nil to £2,108 million), respectively. The decrease in the maximum potential undiscounted amount of future payments for all earnout agreements is due to earnout arrangements that have completed and payments made on active arrangements during the year and exchange adjustments, partially offset by earnout arrangements related to new acquisitions.

20. Bank overdrafts, bonds and bank loans

Amounts falling due within one year:

	2017 £m		2016 £m
Bank overdrafts		393.2		534.3
Corporate bonds and bank loans		230.9		468.2
		624.1		1,002.5

The Group considers that the carrying amount of bank overdrafts approximates their fair value.

Amounts falling due after more than one year:

	2017 £m		2016 £m
Corporate bonds and bank loans		6,250.4		5,564.9

The Group estimates that the fair value of corporate bonds is £5,816.5 million at 31 December 2017 (2016: £6,101.4 million). The fair values of the corporate bonds are based on quoted market prices. The Group considers that the carrying amount of bank loans of £993.4 million (2016: £272.1 million) approximates their fair value.

The corporate bonds, bank loans and overdrafts included within liabilities fall due for repayment as follows:

	2017 £m		2016 £m
Within one year		624.1		1,002.5
Between one and two years		727.6		208.0
Between two and three years		421.0		717.2
Between three and four years		1,384.2		195.7
Between four and five years		356.6		660.9
Over five years		3,361.0		3,783.1
		6,874.5		6,567.4

21. Provisions for liabilities and charges

The movements in 2017 and 2016 were as follows:

	Property £m			Other £m			Total £m
1 January 2016		52.7			130.9			183.6
Charged to the income statement		5.8			14.5			20.3
Acquisitions1		11.1			3.9			15.0
Utilised		(14.7	)		(18.1	)		(32.8	)
Released to the income statement		(2.9	)		(3.7	)		(6.6	)
Transfers		(1.6	)		14.6			13.0
Exchange adjustments		8.1			27.3			35.4
31 December 2016		58.5			169.4			227.9
Charged to the income statement		4.1			16.9			21.0
Acquisitions1		4.0			22.8			26.8
Utilised		(6.0	)		(21.4	)		(27.4	)
Released to the income statement		(5.5	)		(5.9	)		(11.4	)
Transfers		0.1			7.1			7.2
Exchange adjustments		(2.6	)		(12.5	)		(15.1	)
31 December 2017		52.6			176.4			229.0

Note

¹  Acquisitions include £21.9 million (2016: £3.4 million) of provisions arising from revisions to fair value adjustments related to the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

Provisions comprise liabilities where there is uncertainty about the timing of settlement, but where a reliable estimate can be made of the amount. These include provisions for vacant space, sub-let losses and other property-related liabilities. Also included are other provisions, such as certain long-term employee benefits and legal claims, where the likelihood of settlement is considered probable.

The Company and various of its subsidiaries are, from time to time, parties to legal proceedings and claims which arise in the ordinary course of business. The directors do not anticipate that the outcome of these proceedings and claims will have a material adverse effect on the Group’s financial position or on the results of its operations.

22. Share-based payments

Charges for share-based incentive plans were as follows:

	2017 £m		2016 £m		2015 £m
Share-based payments (note 5)		105.0		106.5		99.0

Share-based payments comprise charges for stock options and restricted stock awards to employees of the Group.

As of 31 December 2017, there was £156.0 million (2016: £175.9 million) of total unrecognised compensation cost related to the Group’s restricted stock plans. That cost is expected to be recognised over an average period of one to two years.

Further information on stock options is provided in note 26.

Restricted stock plans

The Group operates a number of equity-settled share incentive schemes, in most cases satisfied by the delivery of stock from one of the Group’s ESOP Trusts. The most significant current schemes are as follows:

Leadership Equity Acquisition Plan III (LEAP III)

Under LEAP III, the most senior executives of the Group, including certain Executive Directors, commit WPP shares (‘investment shares’) in order to have the opportunity to earn additional WPP shares (‘matching shares’). The number of matching shares which a participant can receive at the end of the fixed performance period of five years is dependent on the performance (based on the Total Shareholder Return (TSR)) of the Company over that period against a comparator group of other listed communications services companies. The 2012 LEAP III plan vested in March 2017 at a match of 5.0 shares for each investment share, the maximum match possible. The last LEAP III award was granted in 2012 and no further awards will be made following the introduction of the EPSP.

F-28

Notes to the consolidated financial statements (continued)

22. Share-based payments (continued)

Executive Performance Share Plan (EPSP)

The first grant of restricted stock under the EPSP was made in 2013. This scheme is intended to reward and incentivise the most senior executives of the Group and has effectively replaced LEAP III. The performance period is five complete financial years, commencing with the financial year in which the award is granted. The vest date will usually be in the March following the end of the five-year performance period. Vesting is conditional on continued employment throughout the vesting period.

There are three performance criteria, each constituting one-third of the vesting value, and each measured over this five-year period:

(i) TSR against a comparator group of companies. Threshold performance (equating to ranking in the 50th percentile of the comparator group) will result in 20% vesting of the part of the award dependent on TSR. The maximum vest of 100% will arise if performance ranks in the 90th percentile, with a sliding scale of vesting for performance between threshold and maximum.

(ii) Headline diluted earnings per share. Threshold performance (7% compound annual growth) will again result in a 20% vest. Maximum performance of 14% compound annual growth will give rise to a 100% vest, with a sliding vesting scale for performance between threshold and maximum.

(iii) Return on equity (ROE). Average annual ROE defined as headline diluted EPS divided by the balance sheet value per share of share owners’ equity. Threshold performance ranges between 10-14% average annual ROE and maximum performance ranges between 14-18%, with a sliding scale in between. Threshold again gives rise to a 20% vest, 100% for maximum, with a sliding scale in between.

Performance Share Awards (PSA)

Grants of restricted stock under PSA are dependent upon annual performance targets, typically based on one or more of: operating profit, profit before taxation and operating margin. Grants are made in the year following the year of performance measurement, and vest two years after grant date provided the individual concerned is continually employed by the Group throughout this time.

Leaders, Partners and High Potential Group

This scheme provides annual grants of restricted stock to 1,800 key executives of the Group. Vesting is conditional on continued employment over the three-year vesting period.

Valuation methodology

For all of these schemes, the valuation methodology is based upon fair value on grant date, which is determined by the market price on that date or the application of a Black-Scholes model, depending upon the characteristics of the scheme concerned. The assumptions underlying the Black-Scholes model are detailed in note 26, including details of assumed dividend yields. Market price on any given day is obtained from external, publicly available sources.

Market/non-market conditions

Most share-based plans are subject to non-market performance conditions, such as margin or growth targets, as well as continued employment. LEAP III and EPSP schemes are subject to a number of performance conditions, including TSR, a market-based condition.

For schemes without market-based performance conditions, the valuation methodology above is applied and, at each year end, the relevant accrual for each grant is revised, if appropriate, to take account of any changes in estimate of the likely number of shares expected to vest.

For schemes with market-based performance conditions, the probability of satisfying these conditions is assessed at grant date through a statistical model (such as the Monte Carlo Model) and applied to the fair value. This initial valuation remains fixed throughout the life of the relevant plan, irrespective of the actual outcome in terms of performance. Where a lapse occurs due to cessation of employment, the cumulative charge taken to date is reversed.

22. Share-based payments (continued)

Movement on ordinary shares granted for significant restricted stock plans:

Non-vested 1 January 2017 number m

Granted number m

Lapsed number m

Vested number m

Non-vested 31 December 2017 number m

LEAP III1

0.8

4.0

–

(4.8

)

–

Executive Performance Share Plan (EPSP)

8.0

2.0

(0.9

)

–

9.1

Performance Share Awards (PSA)

1.2

1.2

(0.2

)

(0.3

)

1.9

Leaders, Partners and High Potential Group

6.4

3.1

(0.7

)

(2.0

)

6.8

Weighted average fair value (pence per share):

LEAP III1

860p

860p

–

860p

–

Executive Performance Share Plan (EPSP)

1,373p

1,309p

1,286p

–

1,368p

Performance Share Awards (PSA)

1,596p

1,681p

1,648p

1,504p

1,659p

Leaders, Partners and High Potential Group

1,534p

1,250p

1,518p

1,214p

1,502p

Note

¹  The number of shares granted represents the matched shares awarded on vest date for the 2012 LEAP III plan which vested in March 2017. The actual number of shares that vest for each LEAP III plan is dependent on the extent to which the relevant performance criteria are satisfied.

The total fair value of shares vested for all the Group’s restricted stock plans during the year ended 31 December 2017 was £114.8 million (2016: £116.8 million, 2015: £111.7 million).

23. Provision for post-employment benefits

Companies within the Group operate a large number of pension plans, the forms and benefits of which vary with conditions and practices in the countries concerned. The Group’s pension costs are analysed as follows:

	2017 £m		2016 £m		2015 £m
Defined contribution plans		175.9		153.5		135.0
Defined benefit plans charge to operating profit		16.1		24.6		25.0
Pension costs (note 5)		192.0		178.1		160.0
Net interest expense on pension plans (note 6)		6.3		6.7		7.3
		198.3		184.8		167.3

Defined benefit plans

The pension costs are assessed in accordance with the advice of local independent qualified actuaries. The latest full actuarial valuations for the various pension plans were carried out at various dates in the last three years. These valuations have been updated by the local actuaries to 31 December 2017.

The Group’s policy is to close existing defined benefit plans to new members. This has been implemented across a significant number of the pension plans.

F-29

Notes to the consolidated financial statements (continued)

23. Provision for post-employment benefits (continued)

Contributions to funded plans are determined in line with local conditions and practices. Contributions in respect of unfunded plans are paid as they fall due. The total contributions (for funded plans) and benefit payments (for unfunded plans) paid for 2017 amounted to £68.2 million (2016: £43.7 million, 2015: £70.9 million). Employer contributions and benefit payments in 2018 are expected to be approximately £70 million.

(a) Assumptions

There are a number of areas in pension accounting that involve estimates made by management based on advice of qualified advisors. These include establishing the discount rates, rates of increase in salaries and pensions in payment, inflation, and mortality assumptions. The main weighted average assumptions used for the actuarial valuations at 31 December are shown in the following table:

	2017 % pa		2016 % pa		2015 % pa		2014 % pa
UK
Discount rate1		2.4		2.5		3.7		3.4
Rate of increase in salaries2		n/a		3.5		3.1		3.1
Rate of increase in pensions in payment		4.1		4.1		3.9		3.9
Inflation		2.7		2.8		2.4		2.4
North America
Discount rate1		3.5		3.8		4.0		3.7
Rate of increase in salaries		3.1		3.1		3.0		3.0
Inflation		4.0		4.0		2.5		2.5
Western Continental Europe
Discount rate1		1.9		1.7		2.5		2.1
Rate of increase in salaries		1.9		2.0		2.3		2.2
Rate of increase in pensions in payment		1.2		1.3		1.6		2.0
Inflation		1.7		1.7		2.0		2.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe
Discount rate1		4.2		4.2		4.2		4.2
Rate of increase in salaries		5.5		5.9		5.8		6.1
Inflation		4.0		4.0		4.0		3.9

Notes

¹  Discount rates are based on high-quality corporate bond yields. In countries where there is no deep market in corporate bonds, the discount rate assumption has been set with regard to the yield on long-term government bonds.

²  The salary assumptions are no longer applicable to the UK as the plans were frozen in 2017. Active participants will not accrue additional benefits for future services under these plans.

For the Group’s pension plans, the plans’ assets are invested with the objective of being able to meet current and future benefit payment needs, while controlling balance sheet volatility and future contributions. Pension plan assets are invested with a number of investment managers, and assets are diversified among equities, bonds, insured annuities, property and cash or other liquid investments. The primary use of bonds as an investment class is to match the anticipated cash flows from the plans to pay pensions. The Group is invested in high-quality corporate and government bonds which share similar risk characteristics and are of equivalent currency and term to the plan liabilities. Various insurance policies have also been bought historically to provide a more exact match for the cash flows, including a match for the actual mortality of specific plan members. These insurance policies effectively provide protection against both investment fluctuations and longevity risks. The strategic target allocation varies among the individual plans.

Management considers the types of investment classes in which the pension plan assets are invested. The types of investment classes are determined by economic and market conditions and in consideration of specific asset class risk.

Management periodically commissions detailed asset and liability studies performed by third-party professional investment advisors and actuaries that generate probability-adjusted expected future returns on those assets. These studies also project the estimated future pension payments and evaluate the efficiency of the allocation of the pension plan assets into various investment categories.

23. Provision for post-employment benefits (continued)

At 31 December 2017, the life expectancies underlying the value of the accrued liabilities for the main defined benefit pension plans operated by the Group were as follows:

Years life expectancy after age 65	All plans		North America		UK		Western Continental Europe		Other1
– current pensioners (at age 65) – male		22.4		22.1		23.4		20.8		19.6
– current pensioners (at age 65) – female		24.0		23.6		24.4		24.0		24.8
– future pensioners (current age 45) – male		23.8		23.7		25.0		23.1		19.6
– future pensioners (current age 45) – female		25.7		25.2		26.2		26.2		24.8

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

The life expectancies after age 65 at 31 December 2016 were 22.8 years and 24.5 years for male and female current pensioners (at age 65) respectively, and 24.7 years and 26.5 years for male and female future pensioners (current age 45), respectively.

In the determination of mortality assumptions, management uses the most up-to-date mortality tables available in each country.

The following table provides information on the weighted average duration of the defined benefit pension obligations and the distribution of the timing of benefit payments for the next 10 years. The duration corresponds to the weighted average length of the underlying cash flows.

	All plans		North America		UK		Western Continental Europe		Other1
Weighted average duration of the defined benefit obligation (years)		12.5		9.2		14.5		15.7		8.7
Expected benefit payments over the next 10 years (£m)
Benefits expected to be paid within 12 months		65.2		35.9		17.8		8.8		2.7
Benefits expected to be paid in 2019		61.8		33.4		17.4		8.5		2.5
Benefits expected to be paid in 2020		61.2		32.5		17.8		8.5		2.4
Benefits expected to be paid in 2021		62.3		32.0		18.4		8.9		3.0
Benefits expected to be paid in 2022		61.3		31.0		18.4		9.1		2.8
Benefits expected to be paid in the next five years		302.2		132.8		96.3		51.7		21.4

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

The following table presents a sensitivity analysis for each significant actuarial assumption showing how the defined benefit obligation would have been affected by changes in the relevant actuarial assumption that were reasonably possible at the balance sheet date. This sensitivity analysis applies to the defined benefit obligation only and not to the net defined benefit pension liability in its entirety, the measurement of which is driven by a number of factors including, in addition to the assumptions below, the fair value of plan assets.

The sensitivity analyses are based on a change in one assumption while holding all other assumptions constant so that interdependencies between the assumptions are excluded. The methodology applied is consistent with that used to determine the recognised defined benefit obligation. The sensitivity analysis for inflation is not shown as it is an underlying assumption to build the pension and salary increase assumptions. Changing the inflation assumption on its own without changing the salary or pension assumptions will not result in a significant change in pension liabilities.

F-30

Notes to the consolidated financial statements (continued)

23. Provision for post-employment benefits (continued)

	Increase/(decrease) in benefit obligation
Sensitivity analysis of significant actuarial assumptions	2017 £m			2016 £m
Discount rate
Increase by 25 basis points
UK		(13.1	)		(13.3	)
North America		(9.9	)		(10.9	)
Western Continental Europe		(9.2	)		(10.1	)
Other1		(0.6	)		(0.6	)
Decrease by 25 basis points
UK		13.8			14.1
North America		10.2			11.2
Western Continental Europe		9.8			10.6
Other1		0.6			0.6
Rate of increase in salaries
Increase by 25 basis points
UK		–			0.2
North America		0.1			–
Western Continental Europe		1.5			1.4
Other1		0.6			0.6
Decrease by 25 basis points
UK		–			(0.2	)
North America		(0.1	)		–
Western Continental Europe		(1.5	)		(1.4	)
Other1		(0.6	)		(0.6	)
Rate of increase in pensions in payment
Increase by 25 basis points
UK		2.4			2.3
Western Continental Europe		6.2			6.8
Decrease by 25 basis points
UK		(1.9	)		(2.3	)
Western Continental Europe		(5.8	)		(6.4	)
Life expectancy
Increase in longevity by one additional year
UK		16.9			17.7
North America		6.0			6.2
Western Continental Europe		7.0			7.4
Other1		–			–

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

23. Provision for post-employment benefits (continued)

(b) Assets and liabilities

At 31 December, the fair value of the assets in the pension plans, and the assessed present value of the liabilities in the pension plans are shown in the following table:

	2017 £m			%		2016 £m			%		2015 £m			%
Equities		124.6			13.4		161.9			17.3		132.5			16.3
Bonds		520.0			55.9		566.0			60.6		479.5			58.9
Insured annuities		178.5			19.2		63.5			6.8		60.5			7.4
Property		1.3			0.1		1.6			0.2		1.5			0.2
Cash		9.9			1.1		44.9			4.8		65.1			8.0
Other		95.7			10.3		96.3			10.3		75.1			9.2
Total fair value of assets		930.0			100.0		934.2			100.0		814.2			100.0
Present value of liabilities		(1,135.4	)				(1,209.8	)				(1,039.9	)
Deficit in the plans		(205.4	)				(275.6	)				(225.7	)
Irrecoverable surplus		(0.9	)				(0.9	)				(3.6	)
Net liability1		(206.3	)				(276.5	)				(229.3	)
Plans in surplus		43.9					28.0					31.4
Plans in deficit		(250.2	)				(304.5	)				(260.7	)

Note

¹  The related deferred tax asset is discussed in note 15.

All plan assets have quoted prices in active markets with the exception of insured annuities and other assets.

Surplus/(deficit) in plans by region	2017 £m			2016 £m			2015 £m
UK		31.5			20.0			30.9
North America		(89.2	)		(133.8	)		(123.4	)
Western Continental Europe		(107.7	)		(116.9	)		(97.4	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(40.0	)		(44.9	)		(35.8	)
Deficit in the plans		(205.4	)		(275.6	)		(225.7	)

Some of the Group’s defined benefit plans are unfunded (or largely unfunded) by common custom and practice in certain jurisdictions. In the case of these unfunded plans, the benefit payments are made as and when they fall due. Pre-funding of these plans would not be typical business practice.

F-31

Notes to the consolidated financial statements (continued)

23. Provision for post-employment benefits (continued)

The following table shows the split of the deficit at 31 December between funded and unfunded pension plans.

	2017 Surplus/ (deficit) £m			2017 Present value of liabilities £m			2016 Surplus/ (deficit) £m			2016 Present value of liabilities £m			2015 Surplus/ (deficit) £m			2015 Present value of liabilities £m
Funded plans by region
UK		31.5			(387.5	)		20.0			(406.4	)		30.9			(352.6	)
North America		(21.4	)		(385.4	)		(56.0	)		(420.4	)		(45.5	)		(364.5	)
Western Continental Europe		(37.9	)		(173.3	)		(48.9	)		(180.9	)		(42.3	)		(143.9	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(4.2	)		(15.8	)		(5.8	)		(17.2	)		(4.9	)		(15.0	)
Deficit/ liabilities in the funded plans		(32.0	)		(962.0	)		(90.7	)		(1,024.9	)		(61.8	)		(876.0	)
Unfunded plans by region
UK		–			–			–			–			–			–
North America		(67.8	)		(67.8	)		(77.8	)		(77.8	)		(77.9	)		(77.9	)
Western Continental Europe		(69.8	)		(69.8	)		(68.0	)		(68.0	)		(55.1	)		(55.1	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(35.8	)		(35.8	)		(39.1	)		(39.1	)		(30.9	)		(30.9	)
Deficit/ liabilities in the unfunded plans		(173.4	)		(173.4	)		(184.9	)		(184.9	)		(163.9	)		(163.9	)
Deficit/ liabilities in the plans		(205.4	)		(1,135.4	)		(275.6	)		(1,209.8	)		(225.7	)		(1,039.9	)

In accordance with IAS 19, plans that are wholly or partially funded are considered funded plans.

(c) Pension expense

The following table shows the breakdown of the pension expense between amounts charged to operating profit, amounts charged to finance costs and amounts recognised in the consolidated statement of comprehensive income (OCI):

	2017 £m			2016 £m			2015 £m
Service cost1		13.0			22.4			23.0
Administrative expenses		3.1			2.2			2.0
Charge to operating profit		16.1			24.6			25.0
Net interest expense on pension plans		6.3			6.7			7.3
Charge to profit before taxation for defined benefit plans		22.4			31.3			32.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Changes in demographic assumptions underlying the present value of the plan liabilities		12.7			6.7			13.8
Changes in financial assumptions underlying the present value of the plan liabilities		(17.0	)		(92.6	)		55.4
Experience gain/(loss) arising on the plan liabilities		7.9			1.0			(1.3	)
Change in irrecoverable surplus		–			2.7			(2.7	)
Actuarial gain/(loss) recognised in OCI		17.0			(15.9	)		33.5

Note

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

23. Provision for post-employment benefits (continued)

(d) Movement in plan liabilities

The following table shows an analysis of the movement in the pension plan liabilities for each accounting period:

	2017 £m			2016 £m			2015 £m
Plan liabilities at beginning of year		1,209.8			1,039.9			1,144.8
Service cost1		13.0			22.4			23.0
Interest cost		32.9			37.2			34.6
Actuarial (gain)/loss
Effect of changes in demographic assumptions		(12.7	)		(6.7	)		(13.8	)
Effect of changes in financial assumptions		17.0			92.6			(55.4	)
Effect of experience adjustments		(7.9	)		(1.0	)		1.3
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Gain)/loss due to exchange rate movements		(36.4	)		124.2			13.4
Settlement payments		(1.2	)		(4.8	)		–
Other2		0.6			(1.6	)		4.6
Plan liabilities at end of year		1,135.4			1,209.8			1,039.9

Notes

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

²  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

(e) Movement in plan assets

The following table shows an analysis of the movement in the pension plan assets for each accounting period:

	2017 £m			2016 £m			2015 £m
Fair value of plan assets at beginning of year		934.2			814.2			849.5
Interest income on plan assets		26.6			30.5			27.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Employer contributions		68.2			43.7			70.9
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Loss)/gain due to exchange rate movements		(28.7	)		78.8			12.4
Settlement payments		(1.2	)		(4.8	)		–
Administrative expenses		(3.1	)		(2.2	)		(2.0	)
Other1		0.3			0.1			0.4
Fair value of plan assets at end of year		930.0			934.2			814.2
Actual return on plan assets		40.0			96.8			(4.4	)

Note

¹  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

F-32

Notes to the consolidated financial statements (continued)

24. Risk management policies

Foreign currency risk

The Group’s results in pounds sterling are subject to fluctuation as a result of exchange rate movements. The Group does not hedge this translation exposure to its earnings but does hedge the currency element of its net assets using foreign currency borrowings, cross-currency swaps and forward foreign exchange contracts.

The Group effects these currency net asset hedges by borrowing in the same currencies as the operating (or ‘functional’) currencies of its main operating units. The majority of the Group’s debt is therefore denominated in US dollars, pounds sterling and euros. The Group’s borrowings at 31 December 2017 were primarily made up of $3,931 million, £600 million and €3,202 million (2016: $2,862 million, £1,000 million and €2,952 million). The Group’s average gross debt during the course of 2017 was $3,741 million, £1,242 million and €3,108 million (2016: $3,182 million, £781 million and €3,132 million).

The Group’s operations conduct the majority of their activities in their own local currency and consequently the Group has no significant transactional foreign exchange exposures arising from its operations. Any significant cross-border trading exposures are hedged by the use of forward foreign-exchange contracts. No speculative foreign exchange trading is undertaken.

Interest rate risk

The Group is exposed to interest rate risk on both interest-bearing assets and interest-bearing liabilities. The Group has a policy of actively managing its interest rate risk exposure while recognising that fixing rates on all its debt eliminates the possibility of benefiting from rate reductions and similarly, having all its debt at floating rates unduly exposes the Group to increases in rates.

Including the effect of interest rate and cross-currency swaps, 39.4% of the year-end US dollar debt is at fixed rates averaging 4.62% for an average period of 199 months; 60.6% of the year end US dollar debt is at floating rates averaging 3.19% for an average period of 29 months; 100% of the sterling debt is at a fixed rate of 4.04% for an average period of 245 months; 92.2% of the euro debt is at fixed rates averaging 1.85% for an average period of 80 months and 7.8% of the euro debt is at floating rates averaging 0% for an average of 29 months.

Going concern and liquidity risk

In considering going concern and liquidity risk, the directors have reviewed the Group’s future cash requirements and earnings projections. The directors believe these forecasts have been prepared on a prudent basis and have also considered the impact of a range of potential changes to trading performance. The directors have concluded that the Group should be able to operate within its current facilities and comply with its banking covenants for the foreseeable future and therefore believe it is appropriate to prepare the financial statements of the Group on a going concern basis.

At 31 December 2017, the Group has access to £7.7 billion of committed facilities with maturity dates spread over the years 2018 to 2046 as illustrated below:

	£m		2018 £m		2019 £m		2020 £m		2021 £m		2022+ £m
£ bonds £400m (2.875% ’46)		400.0										400.0
US bond $500m (5.625% ’43)		369.7										369.7
US bond $300m (5.125% ’42)		221.8										221.8
Eurobonds €600m (1.625% ’30)		533.3										533.3
Eurobonds €750m (2.25% ’26)		666.7										666.7
US bond $750m (3.75% ’24)		554.6										554.6
Eurobonds €750m (3.0% ’23)		666.7										666.7
US bond $500m (3.625% ’22)		369.7										369.7
US bond $812m (4.75% ’21)		600.7								600.7
Bank revolver ($2,500m)		1,848.6								1,848.6
£ bonds £200m (6.375% ’20)		200.0						200.0
Eurobonds €250m (3m EURIBOR + 0.32% ’20)		222.2						222.2
Eurobonds €600m (0.75% ’19)		533.3				533.3
Bank revolver (A$520m)		300.4				300.4
Eurobonds €252m (0.43% ’18)		224.0		224.0
Total committed facilities available		7,711.7		224.0		833.7		422.2		2,449.3		3,782.5
Drawn down facilities		6,547.9		224.0		729.1		422.2		1,390.1		3,782.5
Undrawn committed credit facilities		1,163.8

24. Risk management policies (continued)

Given the strong cash generation of the business, its debt maturity profile and available facilities, the directors believe the Group has sufficient liquidity to match its requirements for the foreseeable future.

Treasury activities

Treasury activity is managed centrally from London, New York and Hong Kong, and is principally concerned with the monitoring of working capital, managing external and internal funding requirements and the monitoring and management of financial market risks, in particular interest rate and foreign exchange exposures.

The treasury operation is not a profit centre and its activities are carried out in accordance with policies approved by the Board of Directors and subject to regular review and audit.

The Group manages liquidity risk by ensuring continuity and flexibility of funding even in difficult market conditions. Undrawn committed borrowing facilities are maintained in excess of peak net-borrowing levels and debt maturities are closely monitored. Targets for debt less cash position are set on an annual basis and, to assist in meeting this, working capital targets are set for all the Group’s major operations.

Capital risk management

The Group manages its capital to ensure that entities in the Group will be able to continue as a going concern while maximising the return to stakeholders through the optimisation of the debt and equity balance. The capital structure of the Group consists of debt, which includes the borrowings disclosed in note 10, cash and cash equivalents and equity attributable to equity holders of the parent, comprising issued capital, reserves and retained earnings as disclosed in the consolidated statement of changes in equity and in notes 26 and 27.

Credit risk

The Group’s principal financial assets are cash and short-term deposits, trade and other receivables and investments, the carrying values of which represent the Group’s maximum exposure to credit risk in relation to financial assets, as shown in note 25.

The Group’s credit risk is primarily attributable to its trade receivables. The majority of the Group’s trade receivables are due from large national or multinational companies where the risk of default is considered low. The amounts presented in the consolidated balance sheet are net of allowances for doubtful receivables, estimated by the Group’s management based on prior experience and their assessment of the current economic environment. A relatively small number of clients make up a significant percentage of the Group’s debtors, but no single client represents more than 5% of total trade receivables as at 31 December 2017.

The credit risk on liquid funds and derivative financial instruments is limited because the counterparties are banks with high credit ratings assigned by international credit-rating agencies or banks that have been financed by their government.

A relatively small number of clients contribute a significant percentage of the Group’s consolidated revenues. The Group’s clients generally are able to reduce advertising and marketing spending or cancel projects at any time for any reason. There can be no assurance that any of the Group’s clients will continue to utilise the Group’s services to the same extent, or at all, in the future. A significant reduction in advertising and marketing spending by, or the loss of one or more of, the Group’s largest clients, if not replaced by new client accounts or an increase in business from existing clients, would adversely affect the Group’s prospects, business, financial condition and results of operations.

Sensitivity analysis

The following sensitivity analysis addresses the effect of currency and interest rate risks on the Group’s financial instruments. The analysis assumes that all hedges are highly effective.

Currency risk

At 31 December 2017, the Group’s major foreign currency denominated borrowings are held in individual entities with the same financial reporting currencies as borrowings. Therefore a weakening or strengthening of sterling against the Group’s major currencies would not result in any gains or losses being posted directly to equity and there would be no profit before tax impact.

Interest rate risk

A one percentage point increase in market interest rates for all currencies in which the Group had cash and borrowings at 31 December 2017 would increase profit before tax by approximately £0.2 million (2016: £4.5 million). A one percentage decrease in market interest rates would have an equal and opposite effect. This has been calculated by applying the interest rate change to the Group’s variable rate cash and borrowings.

F-33

Notes to the consolidated financial statements (continued)

25. Financial instruments

Currency derivatives

The Group utilises currency derivatives to hedge significant future transactions and cash flows and the exchange risk arising on translation of the Group’s investments in foreign operations. The Group is a party to a variety of foreign currency derivatives in the management of its exchange rate exposures. The instruments purchased are primarily denominated in the currencies of the Group’s principal markets.

The Group designates its foreign currency-denominated debt as hedging instruments against the currency risk associated with the translation of its foreign operations.

During 2017, the Group held no currency derivatives designated as hedges.

At the balance sheet date, the total nominal amount of outstanding forward foreign exchange contracts not designated as hedges was £177.7 million (2016: £122.0 million). The Group estimates the fair value of these contracts to be a net liability of £2.5 million (2016: net asset of £0.1 million).

These arrangements are designed to address significant exchange exposure and are renewed on a revolving basis as required.

Interest rate swaps

The Group uses interest rate swaps as hedging instruments in fair value hedges to manage its exposure to interest rate movements on its borrowings. Contracts with a nominal value of $500 million have fixed interest receipts of 3.63% until September 2022 and have floating interest payments averaging LIBOR plus 1.52%. Contracts with a nominal value of $812 million have fixed interest receipts of 4.75% until November 2021 and have floating rate payments averaging LIBOR plus 2.34%.

The fair value of interest rate swaps entered into at 31 December 2017 is estimated to be a net liability of £1.2 million (2016: net asset of £17.0 million). These amounts are based on market values of equivalent instruments at the balance sheet date, comprising £2.1 million (2016: £20.0 million) assets included in trade and other receivables and £3.3 million (2016: £3.0 million) liabilities included in trade and other payables.

Changes in the fair value relating to the ineffective portion of interest rate swaps amounted to a gain of £2.8 million (2016: loss of £5.2 million, 2015: loss of £6.8 million) which is included in the revaluation of financial instruments for the year. This gain resulted from a £9.9 million loss on hedging instruments and a £12.7 million gain on hedged items.

25. Financial instruments (continued)

An analysis of the Group’s financial assets and liabilities by accounting classification is set out below:

	Derivatives in designated hedge relationships		Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m		£m			£m		£m		£m			£m
2017
Other investments		–		–			–		1,153.5		–			1,153.5
Cash and short-term deposits		–		–			2,391.4		–		–			2,391.4
Bank overdrafts, bonds and bank loans		–		–			–		–		(624.1	)		(624.1	)
Bonds and bank loans		–		–			–		–		(6,250.4	)		(6,250.4	)
Trade and other receivables: amounts falling due within one year		–		–			8,328.4		–		–			8,328.4
Trade and other receivables: amounts falling due after more than one year		–		–			61.7		–		–			61.7
Trade and other payables: amounts falling due within one year		–		–			–		–		(9,970.5	)		(9,970.5	)
Trade and other payables: amounts falling due after more than one year		–		–			–		–		(8.5	)		(8.5	)
Derivative assets		2.1		1.0			–		–		–			3.1
Derivative liabilities		(3.3)		(3.5	)		–		–		–			(6.8	)
Payments due to vendors (earnout agreements) (note 19)		–		(630.7	)		–		–		–			(630.7	)
Liabilities in respect of put options		–		(258.1	)		–		–		–			(258.1	)
		(1.2)		(891.3	)		10,781.5		1,153.5		(16,853.5	)		(5,811.0	)

F-34

Notes to the consolidated financial statements (continued)

25. Financial instruments (continued)

	Derivatives in designated hedge relationships			Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m			£m			£m		£m		£m			£m
2016
Other investments		–			–			–		1,310.3		–			1,310.3
Cash and short-term deposits		–			–			2,436.9		–		–			2,436.9
Bank overdrafts, bonds and bank loans		–			–			–		–		(1,002.5	)		(1,002.5	)
Bonds and bank loans		–			–			–		–		(5,564.9	)		(5,564.9	)
Trade and other receivables: amounts falling due within one year		–			–			8,468.8		–		–			8,468.8
Trade and other receivables: amounts falling due after more than one year		–			–			89.9		–		–			89.9
Trade and other payables: amounts falling due within one year		–			–			–		–		(10,398.9	)		(10,398.9	)
Trade and other payables: amounts falling due after more than one year		–			–			–		–		(8.4	)		(8.4	)
Derivative assets		20.0			3.0			–		–		–			23.0
Derivative liabilities		(3.0	)		(2.9	)		–		–		–			(5.9	)
Payments due to vendors (earnout agreements) (note 19)		–			(976.5	)		–		–		–			(976.5	)
Liabilities in respect of put options		–			(297.0	)		–		–		–			(297.0	)
		17.0			(1,273.4	)		10,995.6		1,310.3		(16,974.7	)		(5,925.2	)

The following table provides an analysis of financial instruments that are measured subsequent to initial recognition at fair value, grouped into levels 1 to 3 based on the degree to which the fair value is observable:

Level 1 fair value measurements are those derived from quoted prices (unadjusted) in active markets for identical assets or liabilities;

Level 2 fair value measurements are those derived from inputs other than quoted prices included within level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices);

Level 3 fair value measurements are those derived from valuation techniques that include inputs for the asset or liability that are not based on observable market data (unobservable inputs).

25. Financial instruments (continued)

	Level 1 £m		Level 2 £m			Level 3 £m
2017
Derivatives in designated hedge relationships
Derivative assets		–		2.1			–
Derivative liabilities		–		(3.3	)		–
Held for trading
Derivative assets		–		1.0			–
Derivative liabilities		–		(3.5	)		–
Payments due to vendors (earnout agreements) (note 19)		–		–			(630.7	)
Liabilities in respect of put options		–		–			(258.1	)
Available for sale
Other investments		333.2		–			820.3

	Level 1 £m		Level 2 £m			Level 3 £m
2016
Derivatives in designated hedge relationships
Derivative assets		–		20.0			–
Derivative liabilities		–		(3.0	)		–
Held for trading
Derivative assets		–		3.0			–
Derivative liabilities		–		(2.9	)		–
Payments due to vendors (earnout agreements) (note 19)		–		–			(976.5	)
Liabilities in respect of put options		–		–			(297.0	)
Available for sale
Other investments		429.3		–			881.0

Reconciliation of level 3 fair value measurements¹:

	Liabilities in respect of put options £m			Other investments £m
1 January 2016		(234.4	)		847.3
Losses recognised in the income statement		(17.2	)		(1.6	)
Losses recognised in other comprehensive income		–			(105.6	)
Exchange adjustments		(47.4	)		112.9
Additions		(42.9	)		105.7
Disposals		–			(3.4	)
Reclassifications from other investments to interests in associates		–			(74.3	)
Settlements		44.9			–
31 December 2016		(297.0	)		881.0
Gains/(losses) recognised in the income statement		52.5			(13.8	)
Gains recognised in other comprehensive income		–			15.1
Exchange adjustments		7.5			(70.9	)
Additions		(40.5	)		67.7
Disposals		–			(1.7	)
Cancellations		2.9			–
Reclassifications from other investments to interests in associates		–			(57.1	)
Settlements		16.5			–
31 December 2017		(258.1	)		820.3

Note

¹  The reconciliation of payments due to vendors (earnout agreements) is presented in note 19.

F-35

Notes to the consolidated financial statements (continued)

25. Financial instruments (continued)

The fair values of financial assets and liabilities are based on quoted market prices where available. Where the market value is not available, the Group has estimated relevant fair values on the basis of publicly available information from outside sources.

Payments due to vendors and liabilities in respect of put options

Future anticipated payments due to vendors in respect of contingent consideration (earnout agreements) are recorded at fair value, which is the present value of the expected cash outflows of the obligations. Liabilities in respect of put option agreements are initially recorded at the present value of the redemption amount in accordance with IAS 32 and subsequently measured at fair value in accordance with IAS 39. Both types of obligations are dependent on the future financial performance of the entity and it is assumed that future profits are in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition. At 31 December 2017, the weighted average growth rate in estimating future financial performance was 25.0% (2016: 25.0%), which reflects the prevalence of recent acquisitions in the faster-growing markets and new media sectors. The risk adjusted discount rate applied to these obligations at 31 December 2017 was 1.8% (2016: 1.5%).

A one percentage point increase or decrease in the growth rate in estimated future financial performance would increase or decrease the combined liabilities due to earnout agreements and put options by approximately £8.9 million (2016: £13.4 million) and £9.3 million (2016: £17.9 million), respectively. A 0.5 percentage point increase or decrease in the risk adjusted discount rate would decrease or increase the combined liabilities by approximately £11.2 million (2016: £16.0 million) and £11.4 million (2016: £16.4 million), respectively. An increase in the liability would result in a loss in the revaluation of financial instruments, while a decrease would result in a gain.

Other investments

The fair value of other investments included in level 1 are based on quoted market prices. Other investments included in level 3 are unlisted securities, where market value is not readily available. The Group has estimated relevant fair values on the basis of publicly available information from outside sources. The sensitivity to changes in unobservable inputs is specific to each individual investment.

26. Authorised and issued share capital

	Equity ordinary shares		Nominal value £m
Authorised
At 1 January 2015		1,750,000,000		175.0
At 31 December 2015		1,750,000,000		175.0
At 31 December 2016		1,750,000,000		175.0
At 31 December 2017		1,750,000,000		175.0
Issued and fully paid
At 1 January 2015		1,325,747,724		132.6
Exercise of share options		3,618,300		0.3
At 31 December 2015		1,329,366,024		132.9
Exercise of share options		2,514,706		0.3
At 31 December 2016		1,331,880,730		133.2
Exercise of share options		630,822		0.1
At 31 December 2017		1,332,511,552		133.3

Company’s own shares

The Company’s holdings of own shares are stated at cost and represent shares held in treasury and purchases by the Employee Share Ownership Plan (‘ESOP’) trusts of shares in WPP plc for the purpose of funding certain of the Group’s share-based incentive plans.

The trustees of the ESOP purchase the Company’s ordinary shares in the open market using funds provided by the Company. The Company also has an obligation to make regular contributions to the ESOP to enable it to meet its administrative costs. The number and market value of the ordinary shares of the Company held by the ESOP at 31 December 2017 was 14,232,910 (2016: 13,857,706), and £190.9 million (2016: £251.7 million) respectively. The number and market value of ordinary shares held in treasury at 31 December 2017 was 62,578,938 (2016: 51,026,358) and £839.2 million (2016: £926.6 million) respectively.

26. Authorised and issued share capital (continued)

Share options

WPP Executive Share Option Scheme

As at 31 December 2017, unexercised options over ordinary shares of 6,741 have been granted under the WPP Executive Share Option Scheme as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
3,696		8.333		2015 - 2022
3,045		10.595		2016 - 2023

WPP Worldwide Share Ownership Program

As at 31 December 2017, unexercised options over ordinary shares of 3,603,430 and unexercised options over ADRs of 554,464 have been granted under the WPP Worldwide Share Ownership Program as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
2,125		4.819		2011 - 2018
35,550		5.483		2012 - 2019
20,500		5.483		2013 - 2019
1,125		5.608		2012 - 2019
500		5.917		2011 - 2018
15,275		6.028		2011 - 2018
6,125		6.268		2014 - 2018
116,525		6.268		2014 - 2021
48,250		6.268		2015 - 2021
74,500		7.113		2013 - 2020
32,500		7.113		2014 - 2020
3,000		7.543		2014 - 2020
272,579		8.458		2015 - 2022
67,625		13.145		2017 - 2021
2,178,454		13.145		2017 - 2024
5,125		13.145		2018 - 2024
703,172		13.505		2016 - 2023
20,500		13.505		2017 - 2023

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
14,850		44.560		2012 - 2019
34,705		49.230		2014 - 2021
22,840		56.560		2013 - 2020
6,550		59.500		2011 - 2018
53,719		67.490		2015 - 2022
229,842		102.670		2017 - 2024
191,958		110.760		2016 - 2023

WPP Share Option Plan 2015

As at 31 December 2017, unexercised options over ordinary shares of 9,394,600 and unexercised options over ADRs of 1,041,670 have been granted under the WPP Share Option Plan 2015 as follows:

Number of ordinary shares under option	Exercise price per share (£ )		Exercise dates
20,500		13.085		2020 - 2024
3,767,125		13.085		2020 - 2027
93,250		15.150		2018 - 2022
2,489,900		15.150		2018 - 2025
6,500		15.150		2019 - 2025
17,250		17.055		2019 - 2023
3,000,075		17.055		2019 - 2026

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
430,760		88.260		2020 - 2027
343,560		105.490		2020 - 2026
267,350		115.940		2018 - 2025

F-36

Notes to the consolidated financial statements (continued)

26. Authorised and issued share capital (continued)

The aggregate status of the WPP Share Option Plans during 2017 was as follows:

Movements on options granted (represented in ordinary shares)

	1 January 2017		Granted		Exercised			Lapsed			Outstanding 31 December 2017		Exercisable 31 December 2017
WPP		8,851		–		(2,110	)		–			6,741		6,741
WWOP		7,809,917		–		(620,387	)		(813,780	)		6,375,750		6,370,625
WSOP		10,273,450		5,960,775		(8,325	)		(1,622,950	)		14,602,950		–
		18,092,218		5,960,775		(630,822	)		(2,436,730	)		20,985,441		6,377,366

Weighted-average exercise price for options over

	1 January 2017		Granted		Exercised		Lapsed		Outstanding 31 December 2017		Exercisable 31 December 2017
Ordinary shares (£)
WPP		9.355		–		–		–		9.355		9.355
WWOP		12.059		–		10.428		12.592		12.195		12.194
WSOP		16.192		13.085		–		16.244		14.929		–
ADRs ($)
WPP		59.170		–		59.170		–		–		–
WWOP		93.131		–		57.808		98.281		94.752		94.752
WSOP		109.998		88.260		–		109.612		101.047		–

Options over ordinary shares

Outstanding

Range of exercise prices £	Weighted average exercise price £	Weighted average contractual life Months
4.819 – 17.055	14.169	99

Options over ADRs

Outstanding

Range of exercise prices $	Weighted average exercise price $	Weighted average contractual life Months
44.560 – 115.940	98.860	96

As at 31 December 2017 there was £9.0 million (2016: £9.9 million) of total unrecognised compensation cost related to share options. That cost is expected to be recognised over a weighted average period of 20 months (2016: 20 months).

Share options are satisfied out of newly issued shares.

The weighted average fair value of options granted in the year calculated using the Black-Scholes model was as follows:

	2017		2016		2015
Fair value of UK options (shares)		112.0p		135.0p		144.0p
Fair value of US options (ADRs)		$9.40		$9.94		$11.34
Weighted average assumptions:
UK Risk-free interest rate		0.57%		0.44%		1.04%
US Risk-free interest rate		2.05%		1.60%		1.45%
Expected life (months)		48		48		48
Expected volatility		17%		16%		17%
Dividend yield		2.9%		2.8%		2.8%

Options are issued at an exercise price equal to market value on the date of grant.

The average share price of the Group for the year ended 31 December 2017 was £15.86 (2016: £16.45, 2015: £14.74) and the average ADR price for the same period was $101.86 (2016: $111.20, 2015: $112.88).

Expected volatility is sourced from external market data and represents the historic volatility in the Group’s share price over a period equivalent to the expected option life.

Expected life is based on a review of historic exercise behaviour in the context of the contractual terms of the options, as described in more detail below.

26. Authorised and issued share capital (continued)

Terms of share option plans

In 2015, the Group introduced the Share Option Plan 2015 to replace both the ‘all-employee’ Worldwide Share Ownership Plan and the discretionary Executive Stock Option Plan. Two kinds of options over ordinary shares can be granted, both with a market value exercise price. Firstly, options can be granted to employees who have worked at a company owned by WPP plc for at least two years which are not subject to performance conditions. Secondly, options may be granted on a discretionary basis subject to the satisfaction of performance conditions.

The Worldwide Share Ownership Program was open for participation to employees with at least two years’ employment in the Group. It was not available to those participating in other share-based incentive programs or to Executive Directors. The vesting period for each grant is three years and there are no performance conditions other than continued employment with the Group.

The Executive Stock Option Plan has historically been open for participation to WPP Group Leaders, Partners and High Potential Group. It is not currently offered to parent company Executive Directors. The vesting period is three years and performance conditions include achievement of various TSR (Total Shareholder Return) and EPS (Earnings Per Share) objectives, as well as continued employment. The terms of these stock options are such that if, after nine years and eight months, the performance conditions have not been met, then the stock option will vest automatically.

The Group grants stock options with a life of 10 years, including the vesting period.

27. Other reserves

Other reserves comprise the following:

	Capital redemption reserve £m		Equity reserve £m			Revaluation reserve £m			Translation reserve £m			Total other reserves £m
1 January 2015		2.7		(246.2	)		158.4			121.3			36.2
Exchange adjustments on foreign currency net investments		–		–			–			(272.9	)		(272.9	)
Gain on revaluation of available for sale investments		–		–			206.0			–			206.0
Recognition and remeasurement of financial instruments		–		(59.0	)		–			–			(59.0	)
Share purchases – close period commitments		–		80.0			–			–			80.0
31 December 2015		2.7		(225.2	)		364.4			(151.6	)		(9.7	)
Exchange adjustments on foreign currency net investments		–		–			–			1,309.9			1,309.9
Loss on revaluation of available for sale investments		–		–			(93.1	)		–			(93.1	)
Recognition and remeasurement of financial instruments		–		(21.9	)		–			–			(21.9	)
31 December 2016		2.7		(247.1	)		271.3			1,158.3			1,185.2
Exchange adjustments on foreign currency net investments		–		–			–			(445.5	)		(445.5	)
Gain on revaluation of available for sale investments		–		–			32.1			–			32.1
Recognition and remeasurement of financial instruments		–		(10.1	)		–			–			(10.1	)
31 December 2017		2.7		(257.2	)		303.4			712.8			761.7

F-37

Notes to the consolidated financial statements (continued)

28. Acquisitions

The Group accounts for acquisitions in accordance with IFRS 3 Business Combinations. IFRS 3 requires the acquiree’s identifiable assets, liabilities and contingent liabilities (other than non-current assets or disposal groups held for sale) to be recognised at fair value at acquisition date. In assessing fair value at acquisition date, management make their best estimate of the likely outcome where the fair value of an asset or liability may be contingent on a future event. In certain instances, the underlying transaction giving rise to an estimate may not be resolved until some years after the acquisition date. IFRS 3 requires the release to profit of any acquisition reserves which subsequently become excess in the same way as any excess costs over those provided at acquisition date are charged to profit. At each period end management assess provisions and other balances established in respect of acquisitions for their continued probability of occurrence and amend the relevant value accordingly through the consolidated income statement or as an adjustment to goodwill as appropriate under IFRS 3.

Acquisitions in 2017

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		0.8			79.0			79.8
Property, plant and equipment		5.5			–			5.5
Cash		28.9			–			28.9
Trade receivables due within one year		74.4			–			74.4
Other current assets		20.1			–			20.1
Total assets		129.7			79.0			208.7
Current liabilities		(76.0	)		–			(76.0	)
Trade and other payables due after one year		(10.2	)		(20.5	)		(30.7	)
Deferred tax liabilities		–			(16.8	)		(16.8	)
Provisions		(0.1	)		(4.8	)		(4.9	)
Total liabilities		(86.3	)		(42.1	)		(128.4	)
Net assets		43.4			36.9			80.3
Non-controlling interests								(13.9	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(5.7	)
Goodwill								314.3
Consideration								375.0
Consideration satisfied by:
Cash								213.7
Payments due to vendors								161.3

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £63.9 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material. There were no material acquisitions completed between 31 December 2017 and the date the financial statements have been authorised for issue.

28. Acquisitions (continued)

Acquisitions in 2016

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		10.5			319.1			329.6
Property, plant and equipment		20.6			–			20.6
Cash		57.1			–			57.1
Trade receivables due within one year		249.5			–			249.5
Other current assets		78.0			–			78.0
Total assets		415.7			319.1			734.8
Current liabilities		(299.4	)		(2.8	)		(302.2	)
Trade and other payables due after one year		(40.4	)		(59.5	)		(99.9	)
Deferred tax liabilities		–			(96.1	)		(96.1	)
Provisions		(0.1	)		(11.5	)		(11.6	)
Bank loans		(144.4	)		–			(144.4	)
Total liabilities		(484.3	)		(169.9	)		(654.2	)
Net assets		(68.6	)		149.2			80.6
Non-controlling interests								(15.0	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(98.5	)
Goodwill								799.3
Consideration								766.4
Consideration satisfied by:
Cash								423.3
Payments due to vendors								343.1

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £54.8 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material.

F-38

Notes to the consolidated financial statements (continued)

28. Acquisitions (continued)

Acquisitions in 2015

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		2.4			230.7			233.1
Property, plant and equipment		21.1			–			21.1
Cash		57.7			–			57.7
Trade receivables due within one year		115.4			–			115.4
Other current assets		75.1			–			75.1
Total assets		271.7			230.7			502.4
Current liabilities		(207.9	)		–			(207.9	)
Trade and other payables due after one year		(16.8	)		(49.5	)		(66.3	)
Deferred tax liabilities		–			(70.3	)		(70.3	)
Provisions		(3.3	)		(7.7	)		(11.0	)
Total liabilities		(228.0	)		(127.5	)		(355.5	)
Net assets		43.7			103.2			146.9
Non-controlling interests								(47.2	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(208.6	)
Goodwill								778.9
Consideration								670.0
Consideration satisfied by:
Cash								411.6
Payments due to vendors								258.4

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £27.8 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material.

29. Principal subsidiary undertakings

The principal subsidiary undertakings of the Group are:

	Country of incorporation
Grey Global Group LLC	US
J. Walter Thompson Company LLC	US
GroupM Worldwide LLC	US
The Ogilvy Group LLC	US
Young & Rubicam LLC	US
TNS Group Holdings Ltd	UK

All of these subsidiaries are operating companies and are 100% owned by the Group.

30. Related party transactions

From time to time the Group enters into transactions with its associate undertakings. These transactions were not material for any of the years presented.

31. Reconciliation of profit before interest and taxation to headline PBIT:

Reconciliation of profit before interest and taxation to headline PBIT:

	2017 £m			2016 £m			2015 £m
Profit before interest and taxation		2,021.7			2,112.9			1,679.0
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Goodwill impairment		27.1			27.0			15.1
Gains on disposal of investments and subsidiaries	(129.0)			(44.3)			(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Share of exceptional (gains)/losses of associates		(0.8	)		15.2			21.8
Headline PBIT		2,267.1			2,160.3			1,774.0

Headline PBIT is one of the metrics that management uses to assess the performance of the business.

32. Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors

WPP Finance 2010 has in issue $500 million of 3.625% bonds due September 2022, $300 million of 5.125% bonds due September 2042 and $812 million of 4.75% bonds due November 2021 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited and WPP Jubilee Limited as subsidiary guarantors.

The issuer and guarantors of the bonds (issuer and subsidiary guarantors are 100% owned by WPP plc) are each subject to the reporting requirements under section 15(d) of the Securities Exchange Act of 1934. In accordance with SEC Regulation S-X Rule 3-10, condensed consolidating financial information containing financial information for WPP Finance 2010 and the guarantors is presented. Condensed consolidating financial information is prepared in accordance with IFRS as issued by the IASB. In the parent company, subsidiary issuer and subsidiary guarantors columns investments in subsidiaries are accounted for under the equity method of accounting. Under the equity method, earnings of subsidiaries are reflected as “share of results of subsidiaries” in the income statement and as “investment in subsidiaries” in the balance sheet, as required by the SEC.

In the event that WPP Finance 2010 fails to pay the holders of the securities, thereby requiring WPP plc, WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited or WPP Jubilee Limited to make payment pursuant to the terms of their full and unconditional, and joint and several guarantee of those securities, there is no impediment to WPP plc, WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited or WPP Jubilee Limited obtaining reimbursement for any such payments from WPP Finance 2010.

F-39

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

F-40

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

F-41

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

F-42

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

F-43

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,636.8	)		(27.4	)		6,290.1			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6

F-44

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.3			(3.3	)		(63.8	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,794.0	)		(58.6	)		5,082.8			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6

F-45

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,921.2			—			—			(42,565.2	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			28,141.0			2,079.9			28,677.4			(55,036.3	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.6			(6,169.5	)		—
Cash and short-term deposits		—			235.0			—			6,683.5			(4,527.1	)		2,391.4
		1,661.7			2,406.1			65.8			21,725.7			(10,696.6	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,240.0	)		—			(121.2	)		6,169.5			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,225.7	)		(47.0	)		(15,485.5	)		10,696.6			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,819.6	)		18.8			6,240.2			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,917.6			(55,036.3	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,909.6			(42,565.2	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0

F-46

Notes to the consolidated financial statements (continued)

32.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors (continued)

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			24,162.9			—			—			(37,518.9	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,408.9			2,283.8			26,737.5			(47,660.9	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			151.8			—			5,300.5			(3,029.1	)		2,436.9
		1,653.9			2,219.9			46.0			20,568.2			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(3,141.1	)		—			(215.6	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,986.1	)		(36.4	)		(16,465.7	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,766.2	)		9.6			4,102.5			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,840.0			(47,660.9	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			24,152.4			(37,518.9	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6

F-47

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors

WPP Finance 2010 has in issue $750 million of 3.750% bonds due September 2024 and $500 million of 5.625% bonds due November 2043, with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors.

The issuer and guarantors of the bonds (issuer and subsidiary guarantors are 100% owned by WPP plc) are each subject to the reporting requirements under section 15(d) of the Securities Exchange Act of 1934. In accordance with SEC Regulation S-X Rule 3-10, condensed consolidating financial information containing financial information for WPP Finance 2010 and the guarantors is presented. Condensed consolidating financial information is prepared in accordance with IFRS as issued by the IASB. In the parent company, subsidiary issuer and subsidiary guarantors columns investments in subsidiaries are accounted for under the equity method of accounting. Under the equity method, earnings of subsidiaries are reflected as “share of results of subsidiaries” in the income statement and as “investment in subsidiaries” in the balance sheet, as required by the SEC.

In the event that WPP Finance 2010 fails to pay the holders of the securities, thereby requiring WPP plc, WPP Jubilee Limited or WPP 2005 Limited to make payment pursuant to the terms of their full and unconditional, and joint and several guarantee of those securities, there is no impediment to WPP plc, WPP Jubilee Limited or WPP 2005 Limited obtaining reimbursement for any such payments from WPP Finance 2010.

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

F-48

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹ Prior year figures have been re-presented as described in the accounting policies.

F-49

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

F-50

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

F-51

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,640.6	)		(27.4	)		6,293.9			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6

F-52

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.2			(3.3	)		(63.7	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,797.7	)		(58.6	)		5,086.5			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6

F-53

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,752.6			—			—			(42,396.6	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			27,972.4			2,079.9			28,677.4			(54,867.7	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.5			(6,169.4	)		—
Cash and short-term deposits		—			231.2			—			6,687.3			(4,527.1	)		2,391.4
		1,661.7			2,402.3			65.8			21,729.4			(10,696.5	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,067.6	)		—			(293.5	)		6,169.4			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,053.3	)		(47.0	)		(15,657.8	)		10,696.5			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,651.0	)		18.8			6,071.6			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,749.0			(54,867.7	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,741.0			(42,396.6	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0

F-54

Notes to the consolidated financial statements (continued)

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors (continued)

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			23,994.3			—			—			(37,350.3	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,240.3			2,283.8			26,737.5			(47,492.3	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			148.0			—			5,304.3			(3,029.1	)		2,436.9
		1,653.9			2,216.1			46.0			20,572.0			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(2,968.7	)		—			(388.0	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,813.7	)		(36.4	)		(16,638.1	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,597.6	)		9.6			3,933.9			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,671.4			(47,492.3	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			23,983.8			(37,350.3	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6

F-55

EX-2.15

Exhibit 2.15

WPP plc

27 Farm Street

London W1J 5RJ, England

30 April 2018

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Dear Sir or Madam:

On 18 May 2017, WPP Finance 2013 issued EUR 250,000,000 guaranteed senior bonds due May 2020 which pay a coupon of 3 month EURIBOR + 0.32% (the “Senior Bonds”). The Senior Bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited.

The Registrant hereby agrees, pursuant to instruction 2(b)(i) to the Exhibits to Form 20-F, to furnish the Securities and Exchange Commission with a copy of the instruments relating to the Senior Bonds upon request.

Very truly yours,
WPP plc
By:	/s/ Paul W.G. Richardson
	Paul W.G. Richardson
	Group Chief Financial Officer

EX-2.16

Exhibit 2.16

WPP plc

27 Farm Street

London W1J 5RJ, England

30 April 2018

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Dear Sir or Madam:

On 20 March 2018, WPP Finance 2013 issued EUR 250,000,000 guaranteed senior bonds due March 2022 which pay a coupon of 3 month EURIBOR + 0.45% (the “Senior Bonds”). The Senior Bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited.

The Registrant hereby agrees, pursuant to instruction 2(b)(i) to the Exhibits to Form 20-F, to furnish the Securities and Exchange Commission with a copy of the instruments relating to the Senior Bonds upon request.

Very truly yours,
WPP plc
By:	/s/ Paul W.G. Richardson
	Paul W.G. Richardson
	Group Chief Financial Officer

EX-2.17

Exhibit 2.17

WPP plc

27 Farm Street

London W1J 5RJ, England

30 April 2018

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Dear Sir or Madam:

On 20 March 2018, WPP Finance 2016 issued EUR 500,000,000 1.375% guaranteed senior bonds due March 2025 (the “Senior Bonds”). The Senior Bonds are guaranteed by WPP plc, WPP 2005 Limited, and WPP Jubilee Limited.

The Registrant hereby agrees, pursuant to instruction 2(b)(i) to the Exhibits to Form 20-F, to furnish the Securities and Exchange Commission with a copy of the instruments relating to the Senior Bonds upon request.

Very truly yours,
WPP plc
By:	/s/ Paul W.G. Richardson
	Paul W.G. Richardson
	Group Chief Financial Officer

EX-8.1

Exhibit 8.1

Our principal subsidiaries as of December 31, 2017, are listed below. All other subsidiaries, if considered in the aggregate, would not constitute a significant subsidiary under Rule 1-02(w) of Regulation S-X.

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
United States
Added Value LLC		California
AKQA, Inc.		California
Mirum LLC		California
Possible Worldwide, LLC		California
A. Eicoff & Company, Inc.		Delaware
Acceleration eMarketing Inc		Delaware
Action Exchange, LLC		Delaware
ARCTOUCH LLC		Delaware
Benenson Strategy Group, LLC		Delaware
Bottle Rocket LLC		Delaware
Burson-Marsteller, LLC		Delaware
Catalyst Online LLC		Delaware
CHI Wunderman Partnership LLC		Delaware
CMI Media, LLC		Delaware
Competitive Media Reporting, LLC		Delaware
DeepLocal Inc.		Delaware
Essence Global LLC		Delaware
Finsbury LLC		Delaware
Grey Global Group LLC		Delaware
Group M Worldwide, LLC		Delaware
Group SJR LLC		Delaware
GTB Agency, LLC		Delaware
Hill and Knowlton Strategies, LLC		Delaware
Hogarth Worldwide Inc.		Delaware
International Meetings & Science LLC		Delaware
J. Walter Thompson Company LLC		Delaware
J. Walter Thompson U.S.A., LLC		Delaware
Kantar Health LLC		Delaware
Kantar LLC		Delaware
Kantar Retail, LLC		Delaware
KBM Group LLC		Delaware
Landor, LLC		Delaware
Lightspeed, LLC		Delaware
Marketing Direct LLC		Delaware
Marketplace Ignition, LLC		Delaware
Mediacom Worldwide LLC		Delaware
Metavision Media, LLC		Delaware
Ogilvy Commonhealth Worldwide LLC		Delaware
Ogilvy Public Relations Worldwide LLC		Delaware
Penn, Schoen & Berland Associates, LLC		Delaware

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
PERQ/HCI, LLC	Delaware
Pierry, Inc	Delaware
Possible Mobile, LLC	Delaware
Promotion Execution Partners, LLC	Delaware
Rasor Holdings LLC	Delaware
RB/TDM Holdings, LLC	Delaware
Rockfish Interactive LLC	Delaware
Spafax Networks LLC	Delaware
Sudler & Hennessey, LLC	Delaware
Swift + POSSIBLE LLC	Delaware
Taxi Inc.	Delaware
Team Garage LLC	Delaware
The Exchange Lab Inc	Delaware
The Futures Company Worldwide LLC	Delaware
The Glover Park Group, LLC	Delaware
The Lacek Group LLC	Delaware
The Ogilvy Group, LLC	Delaware
The Seattle Wunderman Network, LLC	Delaware
Viscira, LLC	Delaware
Wavemaker Global LLC	Delaware
WPP Clapton Square, LLC	Delaware
WPP Group Holdings Corp. II	Delaware
WPP Group U.S. Finance LLC	Delaware
WPP Group USA, Inc	Delaware
WPPIH 2001, Inc.	Delaware
Wunderman Data Management, LLC	Delaware
Xaxis US, LLC	Delaware
Xaxis, LLC	Delaware
Young & Rubicam LLC	Delaware
Reese Communications Companies, Inc.	District of Columbia
VML, LLC	Missouri
Wunderman Worldwide, LLC	Nevada
Geometry Global LLC	New York
GHG GreyHealth Group LLC	New York
GWE LLC	New York
Mindshare USA, LLC	New York
Ogilvy & Mather Worldwide, LLC	New York
WPP Montagu Square LLC	New York
SET Management, LLC	Oregon
Public Strategies, Inc.	Texas

1

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
Non-US
MindShare Argentina S.A.		Argentina
Active Sites Alive Pty Limited		Australia
M Media Group Pty Ltd		Australia
Mediacom Australia Pty Limited		Australia
Ogilvy & Mather (Sydney) Pty Limited		Australia
Ogilvy Public Relations Worldwide Pty Limited		Australia
Taylor Nelson Sofres Australia Pty Limited		Australia
The Brand Agency Pty Limited ATF Brand Agency Unit Trust		Australia
Wavemaker Australia Pty Limited		Australia
WPP AUNZ LIMITED		Australia
MediaCom – die Kommunikationsagentur GmbH		Austria
J Walter Thompson Middle East and North Africa E.C.		Bahrain
GroupM Belgium SA		Belgium
FBIZ Comunicacao Ltda		Brazil
GPAT S.A.—Propaganda e Publicidade		Brazil
IBOPE Monitor de Meios Publicitários Ltda.		Brazil
IBOPE Monitor de Verificação Publicitária Ltda		Brazil
J Walter Thompson Publicidade Ltda		Brazil
KANTAR IBOPE Participações Ltda.		Brazil
KANTAR IBOPE Pesquisa de Mídia Ltda.		Brazil
Maristela Mafei Participações S.A.		Brazil
Mídia 123 Serviços de Publicidade Via Internet Ltda.		Brazil
Ogilvy & Mather Brasil Comunicação Ltda		Brazil
WPP Ideal Participações Ltda		Brazil
WPP Pmweb Participações Ltda		Brazil
Y&R Propaganda Ltda		Brazil
Blast Radius Inc.		Canada
Entreprise de Communications Tank Inc.		Canada
J. Walter Thompson Company Limited La Compagnie J. Walter Thompson Limitee		Canada
Mediacom Canada		Canada
MindShare Canada		Canada
Wavemaker Canada Inc.		Canada
WPP Group Canada Finance, Inc.		Canada
Always (Shanghai) Marketing Services Co Ltd		China
Beijing Benpao Century Technology Development Co., Ltd.		China
Neo@ogilvy		China
Blue Hive Shanghai Advertising Co Ltd		China
GroupM (Shanghai) Advertising Co. Ltd		China
GroupM Market Advertising Co. Ltd.		China

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
Guangzhou Dawson Marketing Communication Co. Ltd	China
Hill & Knowlton (China) Public Relations Co Ltd	China
J.Walter Thompson Bridge Advertising Co. Ltd.	China
Kinetic Advertising (Shanghai) Co. Ltd	China
Millward Brown ACSR Co. Ltd	China
Shanghai Easycom Advertising Co., Ltd.	China
Shanghai Linjie Marketing Services Co. Ltd.	China
Shanghai Ogilvy & Mather Advertising Ltd	China
Sinotrust International Information & Consulting (Beijing) Co. Ltd.	China
MediaCom Praha s.r.o.	Czech Republic
WAVEMAKER Czech s.r.o.	Czech Republic
Dis/Play AS	Denmark
MediaCom Danmark A/S	Denmark
Millward Brown ApS	Denmark
WPP Holding Denmark A/S	Denmark
Wunderman A/S	Denmark
CT Finances SA	France
Kantar SAS	France
KR MEDIA France SAS	France
MEC SAS	France
Mediacom Paris SA	France
Ogilvy & Mather S.A.S	France
Regional Management Group SAS	France
Sofres Asia Pacific SAS	France
Taylor Nelson Sofres SAS	France
Commarco GmbH 120274	Germany
EMNID Gesellschaft mit beschränkter Haftung	Germany
Essence Global Germany GmbH	Germany
Geometry Global GmbH	Germany
GREY Düsseldorf GmbH	Germany
GroupM Competence Center GmbH	Germany
HERING SCHUPPENER Healthcare Unternehmensberatung für Gesundheitskommunikation GmbH	Germany
Hirschen Group GmbH	Germany
Kantar Deutschland GmbH	Germany
Kantar Live GmbH	Germany
Mather Direct GmbH	Germany
MediaCom Agentur für Media-Beratung GmbH	Germany
Mindshare GmbH	Germany
PATH GmbH	Germany
plista GmbH	Germany
Syzygy AG	Germany

2

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
thjnk ag	Germany
Wavemaker GmbH	Germany
WPP Deutschland Holding GmbH & Co. KG	Germany
WPP Marketing Communications Germany GmbH	Germany
Young & Rubicam Group Germany GmbH	Germany
Agenda Group (Asia) Limited	Hong Kong
BATES CHINA LIMITED	Hong Kong
GroupM Limited	Hong Kong
MindShare Hong Kong Limited	Hong Kong
Ogilvy & Mather Marketing Communications Limited	Hong Kong
Wavemaker Hong Kong Limited	Hong Kong
WPP Marketing Communications (Hong Kong) Limited	Hong Kong
AnalyticsQuotient Services India Private Limited	India
Encompass Events Private Ltd	India
GroupM Media India Pvt Ltd	India
Hindustan Thompson Associates Private Limited	India
MediaCom Communications Pvt Ltd	India
Mediaedge:cia India Pvt Ltd	India
Ogilvy & Mather Pvt Ltd	India
TNS India Private Limited	India
Millward Brown Ireland Ltd	Ireland
WPP Ireland Limited	Ireland
FAST Srl	Italy
GroupM Srl	Italy
Mediacom Italia Srl	Italy
Mindshare SpA	Italy
Sentrix Global Health Communications Srl	Italy
Wavemaker Italia S.r.l.	Italy
Wavemaker Maxus S.r.l.	Italy
Xtel Srl	Italy
Geometry Global Japan GK	Japan
GroupM Japan KK	Japan
J Walter Thompson Japan GK	Japan
WPP Scangroup Limited	Kenya
WPP Luxembourg Gamma Three Sarl	Luxembourg
WPP Luxembourg Sarl	Luxembourg
WPP Business Services Sdn. Bhd.	Malaysia
WPP Marketing Communications (Malaysia) Sdn Bhd	Malaysia
MindShare de México, S.A. de C.V.	Mexico
Mirum, S.A. de C.V.	Mexico
The GroupM ESP Clever Company S.R.L. de C.V.	Mexico
The GroupM ESP Trading Company, S.R.L. de C.V.	Mexico

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
Worldwide Mediacom México, S.A. de C.V.	Mexico
WPP México, S. de R.L. de C.V.	Mexico
Berkeley Square Holding BV	Netherlands
Cavendish Square Holding BV	Netherlands
Greenhouse Group B.V.	Netherlands
GroupM B.V.	Netherlands
Lightspeed Research B.V.	Netherlands
MediaCom B.V.	Netherlands
Millward Brown/Centrum BV	Netherlands
Russell Square Holding BV	Netherlands
Taylor Nelson Sofres BV	Netherlands
WPP Purgos Two B.V.	Netherlands
WPP Square one B.V	Netherlands
WPP Holdings (New Zealand) Limited	New Zealand
MediaCom AS (Norway)	Norway
GroupM Pakistan (Private) Ltd	Pakistan
Memac Ogilvy & Mather Holding Inc.	Panama
MediaCom—Warszawa Sp.z.o.o.	Poland
MindShare Polska Sp. z.o.o.	Poland
Wavemaker Sp.z.o.o	Poland
M/SIX, Lda.	Portugal
Mediaedge:CIA—Servicos Publicitarios Ltda	Portugal
Diamond Ogilvy LLC	Republic of Korea
Kantar Korea Ltd	Republic of Korea
LLC ‘GroupM’	Russia
LLC ‘MEC’	Russia
LLC ‘Mindshare’	Russia
Mediacom LLC (Russia)	Russia
Mindshare For Advertising and Promotion Company L.L.C (Moshaarakat Al Ryee)	Saudi Arabia
GroupM Asia Pacific Holdings Pte Ltd	Singapore
GroupM Singapore Pte Ltd	Singapore
Ogilvy & Mather (Singapore) Private Ltd	Singapore
Grey Group South Africa (Proprietary) Limited	South Africa
Kantar South Africa (Pty) Limited	South Africa
Mindshare South Africa (Gauteng) (Proprietary) Limited	South Africa
Ogilvy and Mather Johannesburg (Proprietary) Limited	South Africa
Wavemaker (Pty) Ltd	South Africa
GroupM Publicidad Worldwide SA	Spain
Kantar Media S.A.	Spain
Maxus Spain SL	Spain
Mediacom Iberia SA	Spain
Mindshare Spain SA	Spain
Taylor Nelson Sofres S.A. (in Spain)	Spain
The Cocktail Global, S.L.	Spain

3

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
Wavemaker Publicidad Spain S.L.	Spain
WPP Holdings Spain, S.L.	Spain
WPP SERVICES SPAIN SL	Spain
TNS Sifo AB	Sweden
Mediacom AG	Switzerland
Wavemaker Taiwan Ltd	Taiwan
WPP (Thailand) Ltd	Thailand
MediaCom Istanbul Medya Hizmetleri A.S.	Turkey
Mindshare Medya Hizmetleri A.S.	Turkey
Wavemaker İletişim Planlama Hizmetleri Limited Şirketi	Turkey
Asdaa Advertising FZ LLC	United Arab Emirates
MEC MENA FZ LLC	United Arab Emirates
Memac Ogilvy & Mather LLC	United Arab Emirates
Mindshare Advertising LLC	United Arab Emirates
Added Value Limited	United Kingdom
AKQA Limited	United Kingdom
Beaumont Square	United Kingdom
Chi & Partners Limited	United Kingdom
Cognifide Limited	United Kingdom
Cordiant Communications Group Limited	United Kingdom
Design Bridge Limited	United Kingdom
Dialogue Marketing Partnership Limited	United Kingdom
EffectiveBrands Limited	United Kingdom
Enduring Organisation Three	United Kingdom
Essence Global Group Limited	United Kingdom
G2 Branding and Design Limited	United Kingdom
GMT+0 Limited	United Kingdom
Grey Advertising Limited	United Kingdom
GroupM UK Digital Limited	United Kingdom
GROUPM UK Ltd	United Kingdom
Hill & Knowlton Limited	United Kingdom
Hogarth Worldwide Limited	United Kingdom
J. Walter Thompson Group Limited	United Kingdom
Kantar Media UK Ltd	United Kingdom
Kantar Retail UK Limited	United Kingdom
Kantar UK Limited	United Kingdom
Kinetic Worldwide Limited	United Kingdom
KR Media UK Limited	United Kingdom
Lightspeed Research Ltd	United Kingdom

COMPANY NAME	JURISDICTION UNDER WHICH ORGANISED
Maxus Communications (UK) Limited	United Kingdom
MediaCom Group Limited	United Kingdom
Mediacom North Limited	United Kingdom
Mediaedge:CIA Worldwide Limited	United Kingdom
Millward Brown UK Limited	United Kingdom
Mindshare Media UK Limited	United Kingdom
Mortimer Square Limited	United Kingdom
Motion Content Group Limited	United Kingdom
MSIX Communications Limited	United Kingdom
Newcrosse Limited	United Kingdom
Ogilvy & Mather Group (Holdings) Limited	United Kingdom
Ogilvyone Business Limited	United Kingdom
Outrider Limited	United Kingdom
Potato London Ltd	United Kingdom
Precise Media Monitoring Limited	United Kingdom
Research International Group Limited	United Kingdom
Salmon Limited	United Kingdom
SCI Scientific Communications and Information UK Ltd	United Kingdom
Spafax Airline Network Limited	United Kingdom
Stickleback Limited	United Kingdom
Superunion Limited	United Kingdom
The Finsbury Group Limited	United Kingdom
TNS Group Holdings Limited	United Kingdom
TNS-NFO US	United Kingdom
Wavemaker Global Limited	United Kingdom
Wavemaker Limited	United Kingdom
WPP 2005 Limited	United Kingdom
WPP AMC Holdings	United Kingdom
WPP Beans Limited	United Kingdom
WPP Finance Co. Limited	United Kingdom
WPP Group (UK) Ltd	United Kingdom
WPP Investments Limited	United Kingdom
WPP Jubilee Limited	United Kingdom
WPP Ottawa Ltd	United Kingdom
WPP Sparkle Limited	United Kingdom
WPP Unicorn Limited	United Kingdom
Young & Rubicam Development (Holdings) Limited	United Kingdom
Young & Rubicam Group Limited	United Kingdom
Young & Rubicam Holdings (UK) Limited	United Kingdom
WPP Media Ltd	Vietnam

4

EX-12.1

Exhibit 12.1

Certification

I, Roberto Quarta, certify that:

1. I have reviewed this annual report on Form 20-F of WPP plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the company’s internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company’s internal control over financial reporting; and

5. The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: 30 April 2018

/s/ Roberto Quarta

Roberto Quarta

Executive Chairman

(principal executive officer)

EX-12.2

Exhibit 12.2

Certification

I, Paul Richardson, certify that:

1. I have reviewed this annual report on Form 20-F of WPP plc;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the company’s internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company’s internal control over financial reporting; and

5. The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: 30 April 2018

/s/ Paul W.G. Richardson

Paul W.G. Richardson

Group Chief Financial Officer

(principal financial officer)

EX-13.1

Exhibit 13.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of WPP plc (the “Company”) on Form 20-F for the period ending 31 December 2017 (the “Report”), I, Roberto Quarta, Executive Chairman of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) The information contained in the Report fairly presents, in all material respects, the Company’s financial position and results of operations.

Date: 30 April 2018

/s/ Roberto Quarta

Roberto Quarta

Executive Chairman

EX-13.2

Exhibit 13.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of WPP plc (the “Company”) on Form 20-F for the period ending 31 December 2017 (the “Report”), I, Paul Richardson, Group Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) The information contained in the Report fairly presents, in all material respects, the Company’s financial position and results of operations.

Date: 30 April 2018

/s/ Paul W.G. Richardson

Paul W.G. Richardson

Group Chief Financial Officer

EX-14.1

Exhibit 14.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-06378, No. 333-103888, No. 333-108149, No. 333-129640, No. 333-129733, No. 333-152662, No. 333-157729, No. 333-185886, No. 333-185887, No. 333-185889, No. 333-185890, No. 333-208658, No. 333-208660 and No. 333-208661 each on Form S-8, and Registration Statement No. 333-192115-03 on Form F-3 of our reports dated 30 April 2018, relating to the consolidated financial statements of WPP plc and subsidiaries (the “Company”) (which report expresses an unqualified opinion and includes an explanatory paragraph relating to the change in accounting policy of the presentation of the consolidated income statement for the year ended 31 December 2017 to a “function of expense” method of presentation as outlined in International Accounting Standards 1, Presentation of Financial Statements), and the effectiveness of the Company’s internal control over financial reporting, appearing in this Annual Report on Form 20-F of WPP plc for the year ended 31 December 2017, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ Deloitte LLP

Deloitte LLP

London, United Kingdom

30 April 2018

XML

Document and Entity Information	12 Months Ended
	Dec. 31, 2017 shares
Document - Document and Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Trading Symbol	WPP
Entity Registrant Name	WPP plc
Entity Central Index Key	0000806968
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,332,511,552

XML

Consolidated Income Statement - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	[1]	Dec. 31, 2015	[1]
Profit or loss [abstract]
Revenue	£ 15,265.4	£ 14,388.9		£ 12,235.2
Costs of services	(12,090.2)	(11,348.1)		(9,709.1)
Gross profit	3,175.2	3,040.8		2,526.1
General and administrative costs	(1,267.0)	(977.7)		(894.1)
Operating profit	1,908.2	2,063.1		1,632.0
Share of results of associates	113.5	49.8		47.0
Profit before interest and taxation	2,021.7	2,112.9		1,679.0
Finance income	95.2	80.4		72.4
Finance costs	(269.8)	(254.5)		(224.1)
Revaluation of financial instruments	262.2	(48.3)		(34.7)
Profit before taxation	2,109.3	1,890.5		1,492.6
Taxation	(197.0)	(388.9)		(247.5)
Profit for the year	1,912.3	1,501.6		1,245.1
Attributable to:
Equity holders of the parent	1,816.6	1,400.1		1,160.2
Non-controlling interests	95.7	101.5		84.9
Profit for the year	£ 1,912.3	£ 1,501.6		£ 1,245.1
Earnings per share
Basic earnings per ordinary share	£ 1.440	£ 1.096		£ 0.900
Diluted earnings per ordinary share	£ 1.424	£ 1.080		£ 0.884

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Consolidated Statement of Comprehensive Income - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Statement of comprehensive income [abstract]
Profit for the year	£ 1,912.3	£ 1,501.6	[1]	£ 1,245.1	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(465.2)	1,378.0		(275.9)
Gain/(loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(433.1)	1,284.9		(69.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income	(440.7)	1,268.6		(41.6)
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	£ 1,471.6	£ 2,770.2		£ 1,203.5

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Consolidated Cash Flow Statement - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of cash flows [abstract]
Net cash inflow from operating activities	£ 1,408.1	£ 1,773.8	£ 1,359.9
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(669.5)
Purchases of property, plant and equipment	(288.9)	(252.1)	(210.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(499.7)	(916.2)	(902.5)
Financing activities
Share option proceeds	6.4	27.2	27.6
Cash consideration for non-controlling interests	(47.3)	(58.3)	(23.6)
Share repurchases and buy-backs	(504.2)	(427.4)	(587.6)
Net increase/(decrease) in borrowings	599.6	(22.5)	492.0
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash outflow from financing activities	(785.6)	(1,193.5)	(704.0)
Net increase/(decrease) in cash and cash equivalents	122.8	(335.9)	(246.6)
Translation of cash and cash equivalents	(27.2)	291.9	(54.4)
Cash and cash equivalents at beginning of year	1,902.6	1,946.6	2,247.6
Cash and cash equivalents at end of year	£ 1,998.2	£ 1,902.6	£ 1,946.6

XML

Consolidated Balance Sheet - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Non-current assets
Goodwill	£ 12,952.9	£ 13,214.3
Other	2,018.4	2,217.3
Property, plant and equipment	979.5	968.7
Interests in associates and joint ventures	1,065.2	1,069.4
Other investments	1,153.5	1,310.3
Deferred tax assets	160.3	140.4
Trade and other receivables	176.2	204.9
Non-current assets	18,506.0	19,125.3
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	12,112.3	12,374.5
Cash and short-term deposits	2,391.4	2,436.9
Current assets	15,162.7	15,443.0
Current liabilities
Trade and other payables	(14,241.1)	(15,010.4)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Current liabilities	(15,514.5)	(16,765.2)
Net current liabilities	(351.8)	(1,322.2)
Total assets less current liabilities	18,154.2	17,803.1
Non-current liabilities
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables	(992.8)	(1,273.8)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(8,192.2)	(8,035.5)
Net assets	9,962.0	9,767.6
Equity
Called-up share capital	133.3	133.2
Share premium account	568.5	562.2
Other reserves	761.7	1,185.2
Own shares	(1,171.1)	(962.0)
Retained earnings	9,200.8	8,405.9
Equity share owners' funds	9,493.2	9,324.5
Non-controlling interests	468.8	443.1
Total equity	£ 9,962.0	£ 9,767.6

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Consolidated Statement of Changes in Equity - GBP (£) £ in Millions		Total		Called-up share capital [member]	Share premium account [member]	Shares to be issued [member]	Other reserves [member]	[1]	Own shares [member]	Retained earnings [member]	Total equity share owner's funds [member]	Non-controlling interests [member]
Beginning balance at Dec. 31, 2014		£ 7,826.8		£ 132.6	£ 508.0	£ 0.3	£ 36.2		£ (283.7)	£ 7,106.7	£ 7,500.1	£ 326.7
Ordinary shares issued		27.5		0.3	27.3	£ (0.3)				0.2	27.5
Treasury share additions		(406.0)							(406.0)		(406.0)
Treasury share allocations									3.6	(3.6)
Profit for the year		1,245.1	[2]							1,160.2	1,160.2	84.9
Exchange adjustments on foreign currency net investments		(275.9)					(272.9)				(272.9)	(3.0)
Gain (loss) on revaluation of available for sale investments		206.0					206.0				206.0
Actuarial gain (loss) on defined benefit pension plans		33.5								33.5	33.5
Deferred tax on defined benefit pension plans		(5.2)								(5.2)	(5.2)
Other comprehensive (loss)/income		(41.6)					(66.9)			28.3	(38.6)	(3.0)
Dividends paid		(601.0)								(545.8)	(545.8)	(55.2)
Non-cash share-based incentive plans (including share options)		99.0								99.0	99.0
Tax adjustment on share-based payments		18.0								18.0	18.0
Net movement in own shares held by ESOP Trusts		(181.6)							(33.5)	(148.1)	(181.6)
Recognition/remeasurement of financial instruments		(59.7)					(59.0)			(0.7)	(59.7)
Share purchases - close period commitments		82.9					80.0			2.9	82.9
Acquisition of subsidiaries	[3]	6.4								(18.6)	(18.6)	25.0
End of year at Dec. 31, 2015		8,015.8		132.9	535.3		(9.7)		(719.6)	7,698.5	7,637.4	378.4
Ordinary shares issued		27.2		0.3	26.9						27.2
Treasury share additions		(274.5)							(274.5)		(274.5)
Treasury share allocations									3.9	(3.9)
Profit for the year		1,501.6	[2]							1,400.1	1,400.1	101.5
Exchange adjustments on foreign currency net investments		1,378.0					1,309.9				1,309.9	68.1
Gain (loss) on revaluation of available for sale investments		(93.1)					(93.1)				(93.1)
Actuarial gain (loss) on defined benefit pension plans		(15.9)								(15.9)	(15.9)
Deferred tax on defined benefit pension plans		(0.4)								(0.4)	(0.4)
Other comprehensive (loss)/income		1,268.6					1,216.8			(16.3)	1,200.5	68.1
Dividends paid		(706.1)								(616.5)	(616.5)	(89.6)
Non-cash share-based incentive plans (including share options)		106.5								106.5	106.5
Tax adjustment on share-based payments		3.9								3.9	3.9
Net movement in own shares held by ESOP Trusts		(152.9)							28.2	(181.1)	(152.9)
Recognition/remeasurement of financial instruments		4.9					(21.9)			26.8	4.9
Share purchases - close period commitments		8.6								8.6	8.6
Acquisition of subsidiaries	[3]	(36.0)								(20.7)	(20.7)	(15.3)
End of year at Dec. 31, 2016		9,767.6		133.2	562.2		1,185.2		(962.0)	8,405.9	9,324.5	443.1
Ordinary shares issued		6.4		0.1	6.3						6.4
Treasury share additions		(289.6)							(289.6)		(289.6)
Treasury share allocations									112.2	(112.2)
Profit for the year		1,912.3								1,816.6	1,816.6	95.7
Exchange adjustments on foreign currency net investments		(465.2)					(445.5)				(445.5)	(19.7)
Gain (loss) on revaluation of available for sale investments		32.1					32.1				32.1
Actuarial gain (loss) on defined benefit pension plans		17.0								17.0	17.0
Deferred tax on defined benefit pension plans		(24.6)								(24.6)	(24.6)
Other comprehensive (loss)/income		(440.7)					(413.4)			(7.6)	(421.0)	(19.7)
Dividends paid		(839.3)								(751.5)	(751.5)	(87.8)
Non-cash share-based incentive plans (including share options)		105.0								105.0	105.0
Tax adjustment on share-based payments		3.0								3.0	3.0
Net movement in own shares held by ESOP Trusts		(214.6)							(31.7)	(182.9)	(214.6)
Recognition/remeasurement of financial instruments		(21.8)					(10.1)			(11.7)	(21.8)
Acquisition of subsidiaries	[3]	(26.3)								(63.8)	(63.8)	37.5
End of year at Dec. 31, 2017		£ 9,962.0		£ 133.3	£ 568.5		£ 761.7		£ (1,171.1)	£ 9,200.8	£ 9,493.2	£ 468.8

[1] Other reserves are analysed in note 27.

[2] Prior year figures have been re-presented as described in the accounting policies.

[3] Acquisition of subsidiaries represents movements in retained earnings and non-controlling interests arising from changes in ownership of existing subsidiaries and recognition of non-controlling interests on new acquisitions.

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Accounting policies

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Accounting policies

Accounting policies

The consolidated financial statements of WPP plc and its subsidiaries (the Group) for the year ended 31 December 2017 have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board as they apply to the financial statements of the Group for the year ended 31 December 2017.

Basis of preparation

The consolidated financial statements have been prepared under the historical cost convention, except for the revaluation of certain financial instruments. The principal accounting policies are set out below.

The financial statements were approved by the Board of Directors and authorized for issue on 30 April 2018.

Basis of consolidation

The consolidated financial statements include the results of the Company and all its subsidiary undertakings made up to the same accounting date. All intra-Group balances, transactions, income and expenses are eliminated in full on consolidation. The results of subsidiary undertakings acquired or disposed of during the period are included or excluded from the consolidated income statement from the effective date of acquisition or disposal.

Presentation

The Group has changed its accounting policy in regard to the presentation of the income statement under IAS 1 Presentation of Financial Statements for the year ended 31 December 2017, moving from a ‘nature of expense’ method of presentation to a ‘function of expense’ method of presentation. The Group considers this to be a more reliable and relevant presentation and prior years have been represented in accordance with IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. This change in accounting policy has not resulted in a change to revenue, operating profit or profit for any of the years presented.

Goodwill and other intangible assets

Intangible assets comprise goodwill, certain acquired separable corporate brand names, acquired customer relationships, acquired proprietary tools and capitalised computer software not integral to a related item of hardware.

Goodwill represents the excess of fair value attributed to investments in businesses or subsidiary undertakings over the fair value of the underlying net assets, including intangible assets, at the date of their acquisition.

Goodwill impairment reviews are undertaken annually or more frequently if events or changes in circumstances indicate a potential impairment. The carrying value of goodwill is compared to the net present value of future cash flows derived from the underlying assets using a projection period of up to five years for each cash-generating unit. After the projection period a steady growth rate representing an appropriate long-term growth rate for the industry is applied. Any impairment is recognised immediately as an expense and is not subsequently reversed.

Corporate brand names, customer relationships and proprietary tools acquired as part of acquisitions of businesses are capitalised separately from goodwill as intangible assets if their value can be measured reliably on initial recognition and it is probable that the expected future economic benefits that are attributable to the asset will flow to the Group.

Certain corporate brands of the Group are considered to have an indefinite economic life because of the institutional nature of the corporate brand names, their proven ability to maintain market leadership and profitable operations over long periods of time and the Group’s commitment to develop and enhance their value. The carrying value of these intangible assets is reviewed at least annually for impairment and adjusted to the recoverable amount if required.

Amortisation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life as follows:

• Brand names (with finite lives) – 10-20 years.

• Customer-related intangibles – 3-10 years.

• Other proprietary tools – 3-10 years.

• Other (including capitalised computer software) – 3-5 years.

Contingent consideration

Contingent consideration is accounted for in accordance with IFRS 3 Business Combinations. Contingent consideration only applies to situations where contingent payments are not dependent on future employment of vendors and any such payments are expensed when they relate to future employment.

Future anticipated payments to vendors in respect of contingent consideration (earnout agreements) are initially recorded at fair value which is the present value of the expected cash outflows of the obligations. The obligations are dependent on the future financial performance of the interests acquired (typically over a four- to five-year period following the year of acquisition)

and assume the operating companies improve profits in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition.

Subsequent adjustments to the fair value are recorded in the consolidated income statement within revaluation of financial instruments.

Property, plant and equipment

Property, plant and equipment are shown at cost less accumulated depreciation and any provision for impairment with the exception of freehold land which is not depreciated. The Group assesses the carrying value of its property, plant and equipment to determine if any impairment has occurred. Where this indicates that an asset may be impaired, the Group applies the requirements of IAS 36 Impairment of Assets in assessing the carrying amount of the asset. This process includes comparing its recoverable amount with its carrying value. Depreciation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life, as follows:

• Freehold buildings – 50 years.

• Leasehold land and buildings – over the term of the lease or life of the asset, if shorter.

• Fixtures, fittings and equipment – 3-10 years.

• Computer equipment – 3-5 years.

Interests in associates and joint ventures

An associate is an entity over which the Group has significant influence. In certain circumstances, significant influence may be represented by factors other than ownership and voting rights, such as representation on the Board of Directors.

The Group’s share of the profits less losses of associate undertakings net of tax, interest and non-controlling interests is included in the consolidated income statement and the Group’s share of net assets is shown within interests in associates in the consolidated balance sheet. The Group’s share of the profits less losses and net assets is based on current information produced by the undertakings, adjusted to conform with the accounting policies of the Group.

The Group assesses the carrying value of its associate undertakings to determine if any impairment has occurred. Where this indicates that an investment may be impaired, the Group applies the requirements of IAS 36 in assessing the carrying amount of the investment. This process includes comparing its recoverable amount with its carrying value.

The Group accounts for joint venture investments under the equity method which is consistent with the Group’s treatment of associates.

Other investments

Other investments are designated as ‘available for sale’ and are shown at fair value with any movements in fair value taken to equity.

On disposal the cumulative gain or loss previously recognised in equity is included in the profit or loss for the year.

Inventory and work in progress

Work in progress is valued at cost, which includes outlays incurred on behalf of clients and an appropriate proportion of directly attributable costs and overheads on incomplete assignments. Provision is made for irrecoverable costs where appropriate. Inventory is stated at the lower of cost and net realisable value.

Trade receivables

Trade receivables are stated net of provisions for bad and doubtful debts.

Foreign currency and interest rate hedging

The Group’s policy on interest rate and foreign exchange rate management sets out the instruments and methods available to hedge interest and currency risk exposures and the control procedures in place to ensure effectiveness.

The Group uses derivative financial instruments to reduce exposure to foreign exchange risk and interest rate movements. The Group does not hold or issue derivative financial instruments for speculative purposes.

Derivatives are initially recognised at fair value at the date a derivative contract is entered into and are subsequently remeasured to their fair value at each balance sheet date. The resulting gain or loss is recognised in profit or loss immediately unless the derivative is designated and effective as a hedging instrument, in which event the timing of the recognition in profit or loss depends on the nature of the hedge relationship.

At the inception of the hedge relationship the entity documents the relationship between the hedging instrument and hedged item, along with its risk

management objectives and its strategy for undertaking various hedge transactions. Furthermore, at the inception of the hedge and on an ongoing basis, the Group documents whether the hedging instrument that is used in a hedging relationship is highly effective in offsetting changes in fair values or cash flows of the hedged item.

Note 25 contains details of the fair values of the derivative instruments used for hedging purposes.

Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recorded in profit or loss immediately, together with any changes in the fair value of the hedged item that is attributable to the hedged risk.

The effective portion of changes in the fair value of derivatives that are designated and qualify as cash flow or net investment hedges is deferred in equity. The gain or loss relating to the ineffective portion is recognised immediately in profit or loss. Amounts deferred in equity are recycled in profit or loss in the periods when the hedged item is recognised in profit or loss. However, when the forecast transaction that is hedged results in the recognition of a non-financial asset or a non-financial liability, the gains and losses previously deferred in equity are transferred from equity and included in the initial measurement of the cost of the asset or liability.

Hedge accounting is discontinued when the hedging instrument expires or is sold, terminated, or exercised, or no longer qualifies for hedge accounting. At that time, any cumulative gain or loss on the hedging instrument recognised in equity is retained in equity until the forecast transaction occurs. If a hedged transaction is no longer expected to occur, the net cumulative gain or loss recognised in equity is transferred to net profit or loss for the period.

Derivatives embedded in other financial instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of host contracts and the host contracts are not carried at fair value with unrealised gains or losses reported in the consolidated income statement.

Liabilities in respect of option agreements

Option agreements that allow the Group’s equity partners to require the Group to purchase a non-controlling interest are treated as derivatives over equity instruments and are recorded in the consolidated balance sheet initially at the present value of the redemption amount in accordance with IAS 32 Financial Instruments: Presentation and subsequently measured at fair value in accordance with IAS 39 Financial Instruments: Recognition and Measurement. The movement in the fair value is recognised as income or expense within revaluation of financial instruments in the consolidated income statement.

Derecognition of financial liabilities

In accordance with IAS 39 Financial Instruments: Recognition and Measurement, a financial liability of the Group is only released to the consolidated income statement when the underlying legal obligation is extinguished.

Debt

Interest-bearing debt is recorded at the proceeds received, net of direct issue costs.

Borrowing costs

Finance costs of borrowing are recognised in the consolidated income statement over the term of those borrowings.

Revenue recognition

Revenue comprises commission and fees earned in respect of amounts billed. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. Revenue is stated exclusive of VAT, sales taxes and trade discounts.

Advertising and Media Investment Management

Revenue is typically derived from commissions on media placements and fees for advertising services. Revenue may consist of various arrangements involving commissions, fees, incentive-based revenue or a combination of the three, as agreed upon with each client.

Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. The amount of revenue recognised depends on whether we act as an agent or as a principal in an arrangement with a client. Where we act as an agent, the revenue recorded is the net amount retained when the fee or commission is earned. Although the Group may bear credit risk in respect of these activities, the arrangements with our clients are such that we consider that we are acting as an agent on their behalf. In such cases, costs incurred with external suppliers (such as media suppliers) are excluded from our revenue. Where the Group acts as a principal, the revenue recorded is the gross amount billed.

Incentive-based revenue typically comprises both quantitative and qualitative elements; on the element related to quantitative targets, revenue is recognised when the quantitative targets have been achieved; on the element related to qualitative targets, revenue is recognised when the incentive is received or receivable.

The Group receives volume rebates from certain suppliers for transactions entered into on behalf of clients that, based on the terms of the relevant contracts and local law, are either remitted to clients or retained by the Group. If amounts are passed on to clients they are recorded as liabilities until settled or, if retained by the Group, are recorded as revenue when earned.

Data Investment Management

Revenue recognised in proportion to the level of service performed for market research contracts is based on proportional performance. In assessing contract performance, both input and output criteria are reviewed. Costs incurred are used as an objective input measure of performance. The primary input of all work performed under these arrangements is labour. As a result of the relationship between labour and cost, there is normally a direct relationship between costs incurred and the proportion of the contract performed to date. Costs incurred as a proportion of expected total costs is used as an initial proportional performance measure. This indicative proportional performance measure is subsequently validated against other more subjective criteria (i.e. relevant output measures) such as the percentage of interviews completed, percentage of reports delivered to a client and the achievement of any project milestones stipulated in the contract. In the event of divergence between the objective and more subjective measures, the more subjective measures take precedence since these are output measures.

While most of the studies provided in connection with the Group’s market research contracts are undertaken in response to an individual client’s or group of clients’ specifications, in certain instances a study may be developed as an off-the-shelf product offering sold to a broad client base. For these transactions, revenue is recognised when the product is delivered. Where the terms of transaction provide for licensing the product on a subscription basis, revenue is recognised over the subscription period on a straight-line basis or, if applicable, based on usage.

Substantially all services are provided on a fixed price basis. Pricing may also include a provision for a surcharge where the actual labour hours incurred in completing a project are significantly above the labour hours quoted in the project proposal. In instances where this occurs, the surcharge will be included in the total revenue base on which to measure proportional performance when the actual threshold is reached provided that collectability is reasonably assured.

Public Relations & Public Affairs and Brand Consulting, Health & Wellness, and Specialist Communications

Revenue is typically derived from retainer fees and services to be performed subject to specific agreement. Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. Revenue is recognised on long-term contracts, if the final outcome can be assessed with reasonable certainty, by including in the consolidated income statement revenue and related costs as contract activity progresses.

Taxation

Corporate taxes are payable on taxable profits at current rates. The tax expense represents the sum of the tax currently payable and deferred tax.

The Group is subject to corporate taxes in a number of different jurisdictions and judgement is required in determining the appropriate provision for transactions where the ultimate tax determination is uncertain. In such circumstances, the Group recognises liabilities for anticipated taxes based on the best information available and where the anticipated liability is both probable and estimable, liabilities are classified as current. Any interest and penalties accrued are included in corporate income taxes both in the consolidated income statement and balance sheet. Where the final outcome of such matters differs from the amount recorded, any differences may impact the income tax and deferred tax provisions in the period in which the final determination is made.

The tax laws that apply to the Group’s subsidiaries may be amended by the relevant tax authorities. Such potential amendments are regularly monitored and adjustments are made to the Group’s tax liabilities and deferred tax assets and liabilities where necessary.

The tax currently payable is based on taxable profit for the year. Taxable profit differs from net profit as reported in the consolidated income statement because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The Group’s liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the balance sheet date.

Deferred tax is the tax expected to be payable or recoverable on differences between the carrying amounts of assets and liabilities in the financial statements and the corresponding tax bases used in the computation of taxable profit, and is accounted for using the balance sheet liability method. Deferred tax liabilities are recognised for all taxable temporary differences unless specifically excepted by IAS 12 Income Taxes. Deferred tax is charged or credited in the consolidated income statement, except when it relates to items charged or credited to other comprehensive income or directly to equity, in which case the deferred tax is also dealt with in other comprehensive income or equity. Deferred tax assets are recognised to the extent that it is probable that taxable profits will be available against which deductible temporary differences can be utilised, which can require the use of accounting estimation and the exercise of judgement. Such assets and liabilities are not recognised if the temporary difference arises from the initial recognition of goodwill or other assets and liabilities (other than in a business combination) in a transaction that affects neither the taxable profit nor the accounting profit.

The carrying amount of deferred tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered.

Deferred tax liabilities are recognised for taxable temporary differences arising on investments in subsidiaries and associates, and interests in joint ventures, except where the Group is able to control the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to set off current tax assets against current tax liabilities and when they relate to income taxes levied by the same taxation authority and the Group intends to settle its current tax assets and liabilities on a net basis.

Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised based on enacted or substantively enacted legislation.

Retirement benefit costs

The Group accounts for retirement benefit costs in accordance with IAS 19 Employee Benefits.

For defined contribution plans, contributions are charged to the consolidated income statement as payable in respect of the accounting period.

For defined benefit plans the amounts charged to operating profit are the current service costs, past service costs, administrative expenses and gains and losses on settlements and curtailments. They are included as part of staff costs. Past service costs are recognised immediately in the consolidated income statement when the related plan amendment occurs. Net interest expense is calculated by applying the discount rate to the recognised overall surplus or deficit in the plan.

Actuarial gains and losses are recognised immediately in the consolidated statement of comprehensive income.

Where defined benefit plans are funded, the assets of the plan are held separately from those of the Group, in separate independently managed funds. Pension plan assets are measured at fair value and liabilities are measured on an actuarial basis using the projected unit method and discounted at a rate equivalent to the current rate of return on a high-quality corporate bond of equivalent currency and term to the plan liabilities. The actuarial valuations are obtained at least triennially and are updated at each balance sheet date.

Recognition of a surplus in a defined benefit plan is limited based on the economic gain the Company is expected to benefit from in the future by means of a refund or reduction in future contributions to the plan, in accordance with IAS 19.

Finance leases

Assets held under finance leases are recognised as assets of the Group at the inception of the lease at the lower of their fair value and the present value of the minimum lease payments. Depreciation on leased assets is charged to the consolidated income statement on the same basis as owned assets. Leasing payments are treated as consisting of capital and interest elements and the interest is charged to the consolidated income statement as it is incurred.

Operating leases

Operating lease rentals are charged to the consolidated income statement on a straight-line basis over the lease term. Any premium or discount on the acquisition of a lease is spread over the life of the lease on a straight-line basis.

Translation of foreign currencies

Foreign currency transactions arising from normal trading activities are recorded at the rates in effect at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies at the year end are translated at the year-end exchange rate. Foreign currency gains and losses are credited or charged to the consolidated income statement as they arise.

The income statements of overseas subsidiary undertakings are translated into pounds sterling at average exchange rates and the year-end net assets of these companies are translated at year-end exchange rates.

Exchange differences arising from retranslation of the opening net assets and on foreign currency borrowings (to the extent that they hedge the Group’s investment in such operations) are reported in the consolidated statement of comprehensive income.

Goodwill and fair value adjustments arising on the acquisition of a foreign entity are treated as assets and liabilities of the foreign entity and translated at the closing rate.

Share-based payments

The Group issues equity-settled share-based payments (including share options) to certain employees and accounts for these awards in accordance with IFRS 2 Share-Based Payment. Equity-settled share-based payments are measured at fair value (excluding the effect of non-market-based vesting conditions) at the date of grant. Details regarding the fair value of equity settled share-based transactions are set out in notes 22 and 26.

The fair value determined at the grant date is recognised in the consolidated income statement as an expense on a straight-line basis over the relevant vesting period, based on the Group’s estimate of the number of shares that will ultimately vest and adjusted for the effect of non-market-based vesting conditions.

New IFRS accounting pronouncements

At the date of authorisation of these financial statements, the following Standards, which have not been applied in these financial statements, were in issue but not yet effective:

• IFRS 9: Financial Instruments;

• IFRS 15: Revenue from Contracts with Customers; and

• IFRS 16: Leases.

IFRS 9 is effective from 1 January 2018. It contains requirements for the classification and measurement of financial assets and liabilities, impairment (introducing an expected loss method) and hedge accounting. The Group does not consider that it will have a significant impact on the financial statements of the Group, particularly given the short-term nature of the Group’s trade receivables, which are mainly due from large national or multinational companies. The principal impact will be for equity investments currently designated as ‘available for sale’, where the Group will elect to recognise the fair value movements of certain equity investments through other comprehensive income. Fair value movements of certain other equity investments will be recognised in profit or loss.

IFRS 15 is effective from 1 January 2018 and it will be applied retrospectively to each prior period presented, we do not expect the adoption of IFRS 15 to have a significant impact on the timing of the Group’s revenue recognition nor on the Group’s equity.

However, for certain of our contracts, the adoption of IFRS 15 will result in a change in our accounting for certain third-party costs. Third-party costs are included in revenue where the Group acts as principal with respect to the services provided to the client and is excluded where the Group acts as agent. Under IFRS 15, the principal versus agent assessment is based on whether we control the relevant services before they are transferred to the client. As a result of the adoption of IFRS 15, there will be an increase in third-party costs included in revenue and costs of services. In 2017, these third-party costs were approximately £500 million. This change will increase revenue and costs of services by the same amount and therefore have no impact on operating profit.

IFRS 16 is effective from 1 January 2019. The standard eliminates the classification of leases as either operating or finance leases and introduces a single accounting model. Lessees will be required to recognise a right-of-use asset and related lease liability for the majority of their operating leases and show depreciation of leased assets and interest on lease liabilities separately in the income statement. IFRS 16 will require the Group to recognise substantially all of its current operating lease commitments on the balance sheet and the financial impact of this, together with other implications of the standard, are currently being assessed.

Critical judgements and estimation uncertainty in applying accounting policies

Management is required to make key decisions and judgements whilst acknowledging there is estimation uncertainty in the process of applying the Group’s accounting policies. These estimates and judgements are reviewed on an ongoing basis. Where judgement has been applied or estimation uncertainty exists, the key factors taken into consideration are disclosed in the accounting policies and the appropriate note in these financial statements.

The most significant areas of estimation uncertainty include:

• Goodwill (note 12): The discounted cash flow methodology employed by the Group when testing for goodwill impairment requires estimates regarding revenue growth, operating margins discount rates and working capital requirements.

• Payments due to vendors (earnout agreements) and liabilities in respect of put options: Estimates are required regarding growth rates in deriving future financial performance and discount rates to be applied when measuring the liabilities for earnouts and put options. Further details are disclosed in note 25.

• Provision for post-employment benefits (note 23): Estimates are required in the accounting for defined benefit pension plans, including establishing discount rates, rates of increase in salaries and pensions in payment, inflation and mortality assumptions. These estimates are made by management based on the advice of qualified advisors.

The most significant areas of judgements include:

• Revenue recognition: Judgement is required regarding the timing of recognition, particularly in relation to media volume income with regards to whether it is required to be passed back to the client. Further details are set out in the accounting policy.

• Taxation (note 7): Judgement is required in relation to the level of provisions required and the amount of taxes that will be due, particularly given the many countries in which the Group operates.

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General information

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

General information

1. General information

WPP plc is a company incorporated in Jersey. The address of the registered office is Queensway House, Hilgrove Street, St Helier, Jersey, JE1 1ES and the address of the principal executive office is 27 Farm Street, London, United Kingdom, W1J 5RJ. The nature of the Group’s operations and its principal activities are set out in note 2. These consolidated financial statements are presented in pounds sterling.

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Segment information

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Segment information

2. Segment information

The Group is a leading worldwide communications services organisation offering national and multinational clients a comprehensive range of communications services.

The Group is organised into four reportable segments – Advertising and Media Investment Management; Data Investment Management; Public Relations & Public Affairs; and Brand Consulting, Health & Wellness and Specialist Communications. This last reportable segment includes WPP Digital and direct, digital, & interactive.

IFRS 8 Operating Segments requires operating segments to be identified on the same basis as is used internally for the review of performance and allocation of resources by the Group Chief Executive. Provided certain quantitative and qualitative criteria are fulfilled, IFRS 8 permits the aggregation of these components into reportable segments for the purposes of disclosure in the Group’s financial statements. In assessing the Group’s reportable segments, the directors have had regard to the similar economic characteristics of certain operating segments, their shared client base, the similar nature of their products or services and their long-term margins, amongst other factors.

Operating sectors

Reported contributions were as follows:

Income statement	Revenue1		Revenue less pass-through costs2		Headline PBIT3		Revenue less pass-through costs margin4
	£m		£m		£m		%
2017
Advertising and Media Investment Management		7,180.3		5,851.9		1,109.0		19.0
Data Investment Management		2,690.9		2,052.3		350.3		17.1
Public Relations & Public Affairs		1,171.9		1,140.9		183.2		16.1
Brand Consulting, Health & Wellness and Specialist Communications		4,222.3		4,094.5		624.6		15.3
		15,265.4				2,267.1
2016
Advertising and Media Investment Management		6,547.3		5,413.5		1,027.2		19.0
Data Investment Management		2,661.1		1,994.0		351.5		17.6
Public Relations & Public Affairs		1,101.3		1,078.8		179.8		16.7
Brand Consulting, Health & Wellness and Specialist Communications		4,079.2		3,911.5		601.8		15.4
		14,388.9				2,160.3
2015
Advertising and Media Investment Management		5,552.8		4,652.0		859.7		18.5
Data Investment Management		2,425.9		1,768.1		286.1		16.2
Public Relations & Public Affairs		945.8		929.7		145.2		15.6
Brand Consulting, Health & Wellness and Specialist Communications		3,310.7		3,174.5		483.0		15.2
		12,235.2				1,774.0

Notes

¹  Intersegment sales have not been separately disclosed as they are not material.

²  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

³  A reconciliation from profit before interest and taxation (PBIT) to headline PBIT is provided in note 31. PBIT is reconciled to profit before taxation in the consolidated income statement.

⁴  Revenue less pass-through costs margin is calculated as headline PBIT (defined above) as a percentage of revenue less pass-through costs.

Other information	Share-based payments		Capital additions1		Depreciation and amortisation2		Goodwill impairment		Share of results of associates		Interests in associates and joint ventures
	£m		£m		£m		£m		£m		£m
2017
Advertising and Media Investment Management		57.0		171.3		108.8		19.5		27.0		193.1
Data Investment Management		14.4		58.8		59.9		–		15.3		106.3
Public Relations & Public Affairs		8.6		10.6		12.2		7.6		6.3		34.2
Brand Consulting, Health & Wellness and Specialist Communications		25.0		85.5		86.1		–		64.9		731.6
		105.0		326.2		267.0		27.1		113.5		1,065.2
2016
Advertising and Media Investment Management		60.7		126.2		105.4		20.9		8.3		285.6
Data Investment Management		13.0		61.5		60.9		–		13.2		109.4
Public Relations & Public Affairs		7.5		10.3		11.6		–		3.2		108.1
Brand Consulting, Health & Wellness and Specialist Communications		25.3		87.1		81.5		6.1		25.1		566.3
		106.5		285.1		259.4		27.0		49.8		1,069.4
2015
Advertising and Media Investment Management		55.4		119.7		96.9		15.1		26.8		377.0
Data Investment Management		13.7		58.1		51.8		–		0.8		86.4
Public Relations & Public Affairs		6.7		9.1		9.8		–		2.3		92.0
Brand Consulting, Health & Wellness and Specialist Communications		23.2		59.5		69.9		–		17.1		203.2
		99.0		246.4		228.4		15.1		47.0		758.6

Notes

¹  Capital additions include purchases of property, plant and equipment and other intangible assets (including capitalised computer software).

²  Depreciation of property, plant and equipment and amortisation of other intangible assets.

Contributions by geographical area were as follows:

	2017 £m		2016 £m		2015 £m
Revenue1
North America2		5,547.0		5,280.8		4,491.2
UK		1,985.9		1,866.3		1,777.4
Western Continental Europe		3,160.0		2,943.2		2,425.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,572.5		4,298.6		3,541.0
		15,265.4		14,388.9		12,235.2
Revenue less pass-through costs3
North America2		4,799.0		4,603.7		3,882.3
UK		1,683.5		1,587.6		1,504.5
Western Continental Europe		2,616.0		2,425.5		2,016.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,041.1		3,781.0		3,121.3
Headline PBIT4
North America2		937.4		895.4		728.2
UK		280.0		261.4		243.1
Western Continental Europe		376.0		351.7		277.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		673.7		651.8		525.5
		2,267.1		2,160.3		1,774.0
	Margin		Margin		Margin
Revenue less pass-through costs margin5
North America2		19.5%		19.4%		18.8%
UK		16.6%		16.5%		16.2%
Western Continental Europe		14.4%		14.5%		13.7%
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		16.7%		17.2%		16.8%
		£m		£m
Non-current assets6
North America2		7,667.5		8,189.3
UK		2,098.2		2,138.5
Western Continental Europe		4,542.1		4,321.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,035.8		4,327.2
		18,343.6		18,976.6

Notes

¹ Intersegment sales have not been separately disclosed as they are not material.

²  North America includes the US with revenue of £5,241.3 million (2016: £5,005.8 million, 2015: £4,257.4 million), revenue less pass-through costs of £4,541.0 million (2016: £4,365.1 million, 2015: £3,674.3 million), headline PBIT of £890.3 million (2016: £849.4 million, 2015: £697.3 million) and non-current assets of £7,202.7 million (2016: £7,690.2 million).

³  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

⁴  See note 31 for a reconciliation of PBIT to headline PBIT.

⁵  Revenue less pass-through costs margin is calculated as headline PBIT as a percentage of revenue less pass-through costs.

⁶  Non-current assets excluding financial instruments and deferred tax.

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Costs of services and general and administrative costs

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Costs of services and general and administrative costs

3. Costs of services and general and administrative costs

	2017 £m			2016 £m			2015 £m
Costs of services		12,090.2			11,348.1			9,709.1
General and administrative costs		1,267.0			977.7			894.1
		13,357.2			12,325.8			10,603.2
Costs of services and general and administrative costs include:
	2017 £m			2016 £m			2015 £m
Staff costs (note 5)		8,319.0			7,784.9			6,652.6
Establishment costs		888.6			836.5			726.3
Media pass-through costs		1,350.0			1,223.2			999.7
Data collection pass-through costs		633.7			661.0			647.2
Other costs of services and general and administrative costs1		2,165.9			1,820.2			1,577.4
		13,357.2			12,325.8			10,603.2
Other costs of services and general and administrative costs include:
Goodwill impairment (note 12)		27.1			27.0			15.1
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Amortisation and impairment of acquired intangible assets (note 12)		195.1			168.4			140.1
Amortisation of other intangible assets (note 12)		36.3			38.6			33.7
Depreciation of property, plant and equipment		230.7			215.2			190.0
Losses on sale of property, plant and equipment		1.1			0.8			1.1
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Net foreign exchange losses/(gains)		12.9			(17.0	)		(10.7	)
Operating lease rentals:
Land and buildings		586.6			556.1			476.6
Sublease income		(17.9	)		(11.6	)		(11.3	)
		568.7			544.5			465.3
Plant and machinery		11.9			10.6			18.3
		580.6			555.1			483.6

Notes

¹  Other costs of services and general and administrative costs include £142.1 million (2016: £106.9 million, 2015: £64.0 million) of other pass-through costs.

In 2017, operating profit includes credits totalling £44.8 million (2016: £26.3 million, 2015: £31.6 million) relating to the release of excess provisions and other balances established in respect of acquisitions completed prior to 2016. Further details of the Group’s approach to acquisition reserves, as required by IFRS 3 Business Combinations, are given in note 28.

Investment write-downs of £95.9 million (2016: £86.1 million, 2015: £78.7 million) include £53.1 million in relation to comScore Inc, which had not released any financial statements in relation to its 2015, 2016 or 2017 results due to an internal investigation by their Audit Committee. In 2017, the market value of comScore Inc fell below the Group’s carrying value. Other investment write-downs relate to certain non-core minority investments in the US where forecast financial performance and/or liquidity issues indicate a permanent decline in the recoverability of the Group’s investment.

Gains on disposal of investments and subsidiaries of £129.0 million in 2017 (2016: £44.3 million, 2015: £131.0 million) include £92.3 million of gains arising on the sale of the Group’s equity interest in Asatsu-DK Inc following its acquisition by Bain Capital.

In 2016, gains on remeasurement of equity interests arising from a change in scope of ownership of £232.4 million primarily comprise gains in relation to the reclassification of the Group’s interest in the Imagina Group in Spain from other investments to interests in associates, resulting from WPP attaining significant influence in the period. In 2015, gains on remeasurement of equity interests arising from a change in scope of ownership of £165.0 million primarily comprise gains in relation to the acquisition of a majority stake in IBOPE in Latin America.

In 2017, restructuring costs of £56.8 million (2016: £27.4 million; 2015: £106.2 million) predominantly comprise £33.7 million (2016: £nil; 2015: £69.5 million) of severance costs arising from a structural assessment of certain of the Group’s operations, primarily in the mature markets; and £12.8 million (2016: £27.4 million, 2015: £36.7 million) of costs resulting from the project to transform and rationalise the Group’s IT services and infrastructure including costs relating to the cyber attack in June 2017.

Auditors’ remuneration:

	2017 £m		2016 £m		2015 £m
Fees payable to the Company’s auditors for the audit of the Company’s annual accounts		1.4		1.4		1.5
The audit of the Company’s subsidiaries pursuant to legislation		20.7		19.4		16.2
		22.1		20.8		17.7
Other services pursuant to legislation		4.0		3.7		3.3
Fees payable to the auditors pursuant to legislation		26.1		24.5		21.0
Tax advisory services		0.1		1.6		1.8
Tax compliance services		0.1		1.3		1.0
		0.2		2.9		2.8
Corporate finance services		–		0.1		0.2
Other services1		4.6		5.7		6.5
Total non-audit fees		4.8		8.7		9.5
Total fees		30.9		33.2		30.5

Note

¹  Other services include audits for earnout purposes.

Minimum committed annual rentals

Amounts payable in 2018 under leases will be as follows:

	Plant and machinery						Land and buildings
	2018 £m		2017 £m		2016 £m		2018 £m		2017 £m		2016 £m
In respect of operating leases which expire:
– within one year		5.1		4.0		4.3		88.6		85.1		57.6
– within two to five years		10.8		10.5		9.7		236.2		287.9		240.3
– after five years		0.1		–		0.3		207.8		187.0		163.1
		16.0		14.5		14.3		532.6		560.0		461.0

Future minimum annual amounts payable under all lease commitments in existence at 31 December 2017 are as follows:

	Minimum rental payments £m		Less sub- let rentals £m			Net payment £m
Year ending 31 December
2018		548.6		(18.6	)		530.0
2019		469.0		(6.5	)		462.5
2020		412.9		(4.2	)		408.7
2021		349.1		(2.4	)		346.7
2022		298.3		(2.1	)		296.2
Later years		1,816.0		(2.6	)		1,813.4
		3,893.9		(36.4	)		3,857.5

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Share of results of associates

12 Months Ended

Dec. 31, 2017

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Share of results of associates

4. Share of results of associates

Share of results of associates include:

	2017 £m			2016 £m			2015 £m
Share of profit before interest and taxation		145.1			97.1			95.2
Share of exceptional gains/(losses)		0.8			(15.2	)		(21.8	)
Share of interest and non-controlling interests		(7.8	)		(4.7	)		(1.7	)
Share of taxation		(24.6	)		(27.4	)		(24.7	)
		113.5			49.8			47.0

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Our people

12 Months Ended

Dec. 31, 2017

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Our people

5. Our people

Our staff numbers averaged 134,428 for the year ended 31 December 2017 against 132,657 in 2016 and 124,930 in 2015. Their geographical distribution was as follows:

	2017		2016		2015
North America		27,399		27,246		26,224
UK		14,197		14,070		13,401
Western Continental Europe		25,700		24,996		23,506
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		67,132		66,345		61,799
		134,428		132,657		124,930

Their operating sector distribution was as follows:

	2017		2016		2015
Advertising and Media Investment Management		56,789		55,120		53,227
Data Investment Management		28,629		29,279		28,395
Public Relations & Public Affairs		9,082		9,054		8,492
Brand Consulting, Health & Wellness and Specialist Communications		39,928		39,204		34,816
		134,428		132,657		124,930

At the end of 2017, staff numbers were 134,413 (2016: 134,341, 2015: 128,123). Including all employees of associated undertakings, this figure was approximately 203,000 at 31 December 2017 (2016: 198,000, 2015: 190,000).

Staff costs include:

	2017 £m		2016 £m		2015 £m
Wages and salaries		5,832.3		5,395.6		4,578.4
Cash-based incentive plans		219.2		260.2		231.8
Share-based incentive plans (note 22)		105.0		106.5		99.0
Social security costs		720.3		658.1		578.4
Pension costs (note 23)		192.0		178.1		160.0
Severance		39.5		34.5		24.0
Other staff costs1		1,210.7		1,151.9		981.0
		8,319.0		7,784.9		6,652.6

Note

¹ Freelance and temporary staff costs are included in other staff costs.

Included above are charges of £12.3 million (2016: £15.5 million, 2015: £16.7 million) for share-based incentive plans in respect of key management personnel (who comprise the directors of the Group). Total compensation received by key management personnel in respect of 2017 was £17.8 million (2016: £57.5 million, 2015: £84.2 million) of which £0.7 million (2016: £0.7 million, 2015: £0.7 million) were pension contributions. The value of the EPSP awards, which vest in the year following the end of the five-year performance period, is included in total compensation in the year the relevant five-year performance period ends.

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Finance income, finance costs and revaluation of financial instruments

12 Months Ended

Dec. 31, 2017

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Finance income, finance costs and revaluation of financial instruments

6. Finance income, finance costs and revaluation of financial instruments

Finance income includes:

	2017 £m		2016 £m		2015 £m
Income from available for sale investments		16.8		12.5		18.9
Interest income		78.4		67.9		53.5
		95.2		80.4		72.4

Finance costs include:

	2017 £m		2016 £m		2015 £m
Net interest expense on pension plans (note 23)		6.3		6.7		7.3
Interest on other long-term employee benefits		3.9		2.7		2.5
Interest expense and similar charges1		259.6		245.1		214.3
		269.8		254.5		224.1

Revaluation of financial instruments² include:

	2017 £m		2016 £m			2015 £m
Movements in fair value of treasury instruments		1.1		(19.5	)		(3.7	)
Movements in fair value of other derivatives		–		–			15.9
Revaluation of put options over non-controlling interests		52.5		(17.2	)		(11.3	)
Revaluation of payments due to vendors (earnout agreements)		208.6		(11.6	)		(35.6	)
		262.2		(48.3	)		(34.7	)

Notes

¹  Interest expense and similar charges are payable on bank overdrafts, bonds and bank loans held at amortised cost.

²  Financial instruments are held at fair value through profit and loss.

The majority of the Group’s long-term debt is represented by $2,862 million of US dollar bonds at an average interest rate of 4.48%, €3,202 million of Eurobonds at an average interest rate of 1.71% and £600 million of Sterling bonds at an average interest rate of 4.04%.

Average borrowings under the US Dollar Revolving Credit Facilities (note 10) amounted to the equivalent of $715 million at an average interest rate of 0.78% (2016: $109 million at an average interest rate of 0.82%).

Average borrowings under the Australian dollar Revolving Credit Facilities, amounted to A$412 million at an average rate of 3.24% (2016: A$336 million at an average interest rate of 3.69%).

Average borrowings under the US Commercial Paper Program for 2017 amounted to $860 million at an average interest rate of 1.47% inclusive of margin (2016: $293 million at an average interest rate of 0.75%).

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Taxation

12 Months Ended

Dec. 31, 2017

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Taxation

7. Taxation

In 2017, the effective tax rate on profit before taxation was 9.3% (2016: 20.6%, 2015: 16.6%)

On 22 December 2017, The Tax Cuts and Jobs Act was enacted in the US which reduced the federal tax rate from 35% to 21% from 1 January 2018. This revised rate has been used to revalue deferred tax assets and liabilities, leading to a non-cash credit to the income statement of £234.1 million, partially offset by a one-time deemed repatriation tax charge related to unremitted foreign earnings of £28.1 million, payable over eight years.

The tax charge comprises:

	2017 £m		2016 £m			2015 £m
Corporation tax
Current year		523.4		569.4			403.0
Prior years		(98.6)		(80.3	)		(108.4	)
		424.8		489.1			294.6
Deferred tax
Current year		(235.2)		(88.0	)		(35.8	)
Prior years		7.4		(12.2	)		(11.3	)
		(227.8)		(100.2	)		(47.1	)
Tax charge		197.0		388.9			247.5

The corporation tax credit for prior years in 2017, in 2016 and 2015, mainly comprises the release of a number of provisions following the resolution of tax matters in various countries.

The tax charge for the year can be reconciled to profit before taxation in the consolidated income statement as follows:

	2017 £m		2016 £m			2015 £m
Profit before taxation		2,109.3		1,890.5			1,492.6
Tax at the corporation tax rate of 19.25%1		406.0		378.1			302.3
Tax effect of share of results of associates		(21.8)		(10.0	)		(9.5	)
Irrecoverable withholding taxes		37.0		36.3			25.7
Items that are not deductible/(taxable) in determining taxable profit		(3.9)		9.4			25.4
Effect of different tax rates in subsidiaries operating in other jurisdictions		140.3		60.4			49.9
US Transition Tax related to unremitted foreign earnings		28.1		–			–
Effect of change in US tax rate on deferred tax balances		(234.1)		–			–
Origination and reversal of unrecognised temporary differences		(17.2)		(4.3	)		0.4
Tax losses not recognised or utilised in the year		32.5		52.2			4.0
Utilisation of tax losses not previously recognised		(10.4)		(11.3	)		(10.4	)
Recognition of temporary differences not previously recognised		(68.3)		(29.4	)		(20.6	)
Net release of prior year provisions in relation to acquired businesses		(15.0)		(23.3	)		(22.9	)
Other prior year adjustments		(76.2)		(69.2	)		(96.8	)
Tax charge		197.0		388.9			247.5
Effective tax rate on profit before tax		9.3%		20.6	%		16.6	%

Note

¹  The parent company of the Group is tax resident in the UK. As such, the tax rate in the tax reconciliation for 2017 is the UK corporation tax rate of 19.25% (2016: 20%, 2015: 20.25%).

Factors affecting the tax charge in future years

Given the Group’s geographic mix of profits and the changing international tax environment, the tax rate is expected to increase slightly over the next few years.

Factors that may affect the Group’s future tax charge include the levels and mix of profits in the many countries in which we operate, the prevailing tax rates in each of those countries and also the foreign exchange rates that apply to those profits. The tax charge may also be affected by the impact of acquisitions, disposals and other corporate restructurings, the resolution of open tax issues, future planning, and the ability to use brought forward tax losses. Furthermore, changes in local or international tax rules, for example prompted by the OECD’s Base Erosion and Profit Shifting project (a global initiative to improve the fairness and integrity of tax systems), or new challenges by tax or competition authorities, for example, the European Commission’s state aid investigation into Group Financing Exemption in the UK CFC rules announced in October 2017, may expose us to additional tax liabilities or impact the carrying value of our deferred tax assets, which would affect the future tax charge.

The Group has a number of open tax returns and various ongoing tax audits worldwide but does not currently expect material additional tax exposures to arise, above the amounts provided, as and when the audits are concluded. Liabilities relating to these open and judgemental matters are based upon estimates of whether additional taxes will be due after taking into account external advice where appropriate. Where the final tax outcome of these matters is different from the amounts which were initially recorded then such differences will impact the current and deferred income tax assets and liabilities in the period in which such determination is made.

Tax risk management

We maintain constructive engagement with the tax authorities and relevant government representatives, as well as active engagement with a wide range of international companies and business organisations with similar issues. We engage advisors and legal counsel to obtain opinions on tax legislation and principles. We have a Tax Risk Management Strategy in place which sets out the controls established and our assessment procedures for decision-making and how we monitor tax risk. We monitor proposed changes in taxation legislation and ensure these are taken into account when we consider our future business plans. Our directors are informed by management of any tax law changes, the nature and status of any significant ongoing tax audits, and other developments that could materially affect the Group’s tax position.

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Ordinary dividends

12 Months Ended

Dec. 31, 2017

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Ordinary dividends

8. Ordinary dividends

Amounts recognised as distributions to equity holders in the year:

	2017		2016		2015		2017		2016		2015
Per share	Pence per share						£m		£m		£m
2016 Final dividend		37.05p		28.78p		26.58p		467.2		368.5		343.2
2017 Interim dividend		22.70p		19.55p		15.91p		284.3		248.0		202.6
		59.75p		48.33p		42.49p		751.5		616.5		545.8

Proposed final dividend for the year ended 31 December 2017:

	2017		2016		2015
Per share	Pence per share
Final dividend		37.30p		37.05p		28.78p

The payment of dividends will not have any tax consequences for the Group.

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Earnings per share

12 Months Ended

Dec. 31, 2017

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Earnings per share

9. Earnings per share

Basic EPS

The calculation of basic EPS is as follows:

	2017			2016			2015
Earnings1 (£m)		1,816.6			1,400.1			1,160.2
Average shares used in basic EPS calculation (m)		1,261.1			1,277.8			1,288.5
EPS		144.0	p		109.6	p		90.0	p

Note

¹  Earnings is equivalent to profit for the year attributable to equity holders of the parent.

Diluted EPS

The calculation of diluted EPS is as follows:

	2017			2016			2015
Diluted earnings (£m)		1,816.6			1,400.1			1,160.2
Average shares used in diluted EPS calculation (m)		1,275.8			1,296.0			1,313.0
Diluted EPS		142.4	p		108.0	p		88.4	p

Diluted EPS has been calculated based on the diluted earnings amounts above. At 31 December 2017, options to purchase 8.2 million ordinary shares (2016: 8.4 million, 2015: 7.0 million) were outstanding, but were excluded from the computation of diluted earnings per share because the exercise prices of these options were greater than the average market price of the Group’s shares and, therefore, their inclusion would have been accretive.

A reconciliation between the shares used in calculating basic and diluted EPS is as follows:

	2017 m		2016 m		2015 m
Average shares used in basic EPS calculation		1,261.1		1,277.8		1,288.5
Dilutive share options outstanding		1.8		2.4		3.5
Other potentially issuable shares		12.9		15.8		21.0
Shares used in diluted EPS calculation		1,275.8		1,296.0		1,313.0

At 31 December 2017 there were 1,332,511,552 (2016: 1,331,880,730, 2015: 1,329,366,024) ordinary shares in issue.

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Sources of finance

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Sources of finance

10. Sources of finance

The following table summarises the equity and debt financing of the Group, and changes during the year:

			Shares					Debt
	2017 £m		2016 £m		2017 £m			2016 £m
Analysis of changes in financing
Beginning of year		695.4		668.2		6,033.1			5,157.4
Ordinary shares issued		6.4		27.2		–			–
Net increase/(decrease) in drawings on bank loans and corporate bonds		–		–		599.6			(22.5	)
Amortisation of financing costs included in net debt		–		–		8.0			9.0
Debt acquired		–		–		–			144.4
Other movements		–		–		(6.9	)		(13.1	)
Exchange adjustments		–		–		(152.5	)		757.9
End of year		701.8		695.4		6,481.3			6,033.1

Note

The table above excludes bank overdrafts which fall within cash and cash equivalents for the purposes of the consolidated cash flow statement.

Shares

At 31 December 2017, the Company’s share base was entirely composed of ordinary equity share capital and share premium of £701.8 million (2016: £695.4 million), further details of which are disclosed in note 26.

Debt

US$ bonds The Group has in issue $812 million of 4.75% bonds due November 2021, $500 million of 3.625% bonds due September 2022, $750 million of 3.75% bonds due September 2024, $300 million of 5.125% bonds due September 2042 and $500 million of 5.625% bonds due November 2043.

Eurobonds The Group has in issue €252 million of 0.43% bonds due March 2018, €600 million of 0.75% bonds due November 2019, €750 million of 3% bonds due November 2023, €750 million of 2.25% bonds due September 2026 and €600 million of 1.625% bonds due March 2030. In May 2017, the Group issued €250 million of Floating Rate Notes carrying a coupon of 3m EURIBOR + 0.32% due May 2020.

In March 2018, the Group issued €500 million of 1.375% bonds due March 2025 and €250 million of Floating Rate Notes carrying a coupon of 3m EURIBOR + 0.45% due March 2022.

Sterling bonds The Group has in issue £200 million of 6.375% bonds due November 2020 and £400 million of 2.875% bonds due September 2046.

Revolving Credit Facility The Group has a five-year Revolving Credit Facility of $2.5 billion due July 2021. The Group’s borrowing under these facilities, which are drawn down predominantly in US dollars and pounds sterling, averaged the equivalent of $715 million in 2017. The Group has a A$520 million Revolving Credit Facility due April 2019. The Group’s borrowings under the Australian dollar facilities which were drawn down in Australian dollars and New Zealand dollars, averaged the equivalent of A$412 million in 2017. The Group had available undrawn committed credit facilities of £1,163.8 million at December 2017 (2016: £2,122.3 million).

Borrowings under the $2.5 billion Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of the Group. Borrowings under the A$520 million Revolving Credit Facility are governed by certain financial covenants based on the results and financial position of WPP AUNZ.

US Commercial Paper Program

The Group operates a commercial paper program using its Revolving Credit Facility as a backstop. The average commercial paper outstanding in 2017 was $860.0 million. The US Commercial Paper outstanding at 31 December 2017 was $1,069 million.

The following table is an analysis of future anticipated cash flows in relation to the Group’s debt, on an undiscounted basis which, therefore, differs from the fair value and carrying value:

	2017 £m			2016 £m
Within one year		(391.7	)		(582.9	)
Between one and two years		(896.3	)		(389.5	)
Between two and three years		(584.3	)		(893.0	)
Between three and four years		(1,537.8	)		(369.1	)
Between four and five years		(487.9	)		(812.9	)
Over five years		(4,519.1	)		(5,144.7	)
Debt financing (including interest) under the Revolving Credit Facility and in relation to unsecured loan notes		(8,417.1	)		(8,192.1	)
Short-term overdrafts – within one year		(393.2	)		(534.3	)
Future anticipated cash flows		(8,810.3	)		(8,726.4	)
Effect of discounting/financing rates		1,935.8			2,159.0
Debt financing		(6,874.5	)		(6,567.4	)

Analysis of fixed and floating rate debt by currency including the effect of interest rate and cross-currency swaps:

2017 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,146.1		4.62%		n/a		199
	– floating		1,760.9		n/a		LIBOR		n/a
£	– fixed		600.0		4.04%		n/a		245
€	– fixed		2,623.9		1.85%		n/a		80
	– floating		222.2		n/a		EURIBOR		n/a
Other			128.2		n/a		n/a		n/a
			6,481.3

2016 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,255.6		4.62%		n/a		212
	– floating		1,063.1		n/a		LIBOR		n/a
£	– fixed		800.0		4.53%		n/a		193
	– floating		200.0		n/a		LIBOR		n/a
€	– fixed		2,521.9		1.85%		n/a		93
Other			192.5		n/a		n/a		n/a
			6,033.1

Note

¹  Weighted average. These rates do not include the effect of gains on interest rate swap terminations that are written to income over the life of the original instrument.

The following table is an analysis of future anticipated cash flows in relation to the Group’s financial derivatives, which include interest rate swaps, cash flow hedges and other foreign exchange swaps:

	Financial liabilities				Financial assets
2017	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		97.8		96.7		123.7		128.8
Between one and two years		21.4		20.1		38.6		38.8
Between two and three years		20.5		18.8		39.5		38.6
Between three and four years		20.7		18.6		851.7		851.0
Between four and five years		523.5		521.1		–		–
Over five years		–		–		–		–
		683.9		675.3		1,053.5		1,057.2

	Financial liabilities				Financial assets
2016	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		183.2		183.0		282.5		302.2
Between one and two years		19.2		20.6		51.7		55.4
Between two and three years		18.8		18.1		57.5		58.5
Between three and four years		20.0		18.1		61.2		60.5
Between four and five years		20.7		18.1		1,687.3		1,686.1
Over five years		521.3		518.1		–		–
		783.2		776.0		2,140.2		2,162.7

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Analysis of cash flows

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Analysis of cash flows

11. Analysis of cash flows

The following tables analyse the items included within the main cash flow headings on page F-11.

Net cash from operating activities:

	2017 £m			2016 £m			2015 £m
Profit for the year		1,912.3			1,501.6			1,245.1
Taxation		197.0			388.9			247.5
Revaluation of financial instruments		(262.2	)		48.3			34.7
Finance costs		269.8			254.5			224.1
Finance income		(95.2	)		(80.4	)		(72.4	)
Share of results of associates		(113.5	)		(49.8	)		(47.0	)
Adjustments for:
Non-cash share-based incentive plans (including share options)		105.0			106.5			99.0
Depreciation of property, plant and equipment		230.7			220.8			194.7
Impairment of goodwill		27.1			27.0			15.1
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Amortisation of other intangible assets		36.3			38.6			33.7
Investment write-downs		95.9			86.1			78.7
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Losses on sale of property, plant and equipment		1.1			0.8			1.1
(Increase)/decrease in inventories and work in progress		(44.6	)		(16.7	)		7.8
Increase in trade receivables and accrued income		(45.8	)		(53.7	)		(882.7	)
(Decrease)/increase in trade payables and deferred income		(170.8	)		188.7			713.4
(Increase)/decrease in other receivables		(110.6	)		77.4			(39.0	)
(Decrease)/increase in other payables – short term		(122.8	)		(303.7	)		74.5
Increase in other payables – long-term		20.1			4.5			24.2
Decrease in provisions		(57.3	)		(47.8	)		(62.3	)
Corporation and overseas tax paid		(424.7	)		(414.2	)		(301.2	)
Interest and similar charges paid		(246.6	)		(242.1	)		(212.0	)
Interest received		76.9			73.9			61.3
Investment income		16.8			12.5			4.9
Dividends from associates		46.8			60.4			72.6
Net cash inflow from operating activities		1,408.1			1,773.8			1,359.9

Acquisitions and disposals:

	2017 £m			2016 £m			2015 £m
Initial cash consideration		(214.8	)		(424.1	)		(463.5	)
Cash and cash equivalents acquired (net)		28.9			57.3			57.7
Earnout payments		(199.1	)		(92.3	)		(43.9	)
Purchase of other investments (including associates)		(92.5	)		(260.2	)		(283.2	)
Proceeds on disposal of investments and subsidiaries		296.0			80.5			63.4
Acquisitions and disposals		(181.5	)		(638.8	)		(669.5	)
Cash consideration for non-controlling interests		(47.3	)		(58.3	)		(23.6	)
Net cash outflow		(228.8	)		(697.1	)		(693.1	)
Share repurchases and buy-backs:
	2017 £m			2016 £m			2015 £m
Purchase of own shares by ESOP Trusts	(214.6)			(152.9)			(181.6)
Shares purchased into treasury		(289.6	)		(274.5	)		(406.0	)
Net cash outflow		(504.2	)		(427.4	)		(587.6	)
Net increase/(decrease) in borrowings:
Proceeds from issue of €250 million bonds	214.0			–			–
Repayment of £400 million bonds		(400.0	)		–			–
Proceeds from issue of £400 million bonds	–			400.0			–
Repayment of €498 million bonds		–			(392.1	)		–
Proceeds from issues of €600 million bonds		–			–			858.7
Repayment of €500 million bonds		–			–			(481.9	)
Premium on exchange of €252 million bonds		–			–			(13.7	)
Increase/(decrease) in drawings on bank loans		785.6			(30.4	)		128.9
Net cash inflow/(outflow)		599.6			(22.5	)		492.0
Cash and cash equivalents:
	2017 £m			2016 £m			2015 £m
Cash at bank and in hand		2,049.6			2,256.2			2,227.8
Short-term bank deposits		341.8			180.7			154.6
Overdrafts1		(393.2	)		(534.3	)		(435.8	)
		1,998.2			1,902.6			1,946.6

Note

¹  Bank overdrafts are included in cash and cash equivalents because they form an integral part of the Group’s cash management.

The Group considers that the carrying amount of cash and cash equivalents approximates their fair value.

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Intangible assets

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Intangible assets

12. Intangible assets

Goodwill

The movements in 2017 and 2016 were as follows:

	£m
Cost:
1 January 2016		11,294.2
Additions1		796.6
Revision of earnout estimates		28.4
Exchange adjustments		1,820.2
31 December 2016		13,939.4
Additions1		301.0
Revision of earnout estimates		(60.7	)
Exchange adjustments		(504.4	)
31 December 2017		13,675.3
Accumulated impairment losses and write-downs:
1 January 2016		623.6
Impairment losses for the year		20.0
Exchange adjustments		81.5
31 December 2016		725.1
Impairment losses for the year		27.1
Exchange adjustments		(29.8	)
31 December 2017		722.4
Net book value:
31 December 2017		12,952.9
31 December 2016		13,214.3
1 January 2016		10,670.6

Note

¹  Additions represent goodwill arising on the acquisition of subsidiary undertakings including the effect of any revisions to fair value adjustments that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations. The effect of such revisions was not material in either year presented. Goodwill arising on the acquisition of associate undertakings is shown within interests in associates and joint ventures in note 14.

Cash-generating units with significant goodwill as at 31 December are:

	2017 £m		2016 £m
GroupM		2,906.7		2,966.2
Kantar		2,518.2		2,573.0
Wunderman		1,514.5		1,297.1
Y&R Advertising		1,091.8		1,140.3
Burson-Marsteller		557.6		590.3
Other		4,364.1		4,647.4
Total goodwill		12,952.9		13,214.3

Other goodwill represents goodwill on a large number of cash-generating units, none of which is individually significant in comparison to the total carrying value of goodwill.

Other intangible assets

The movements in 2017 and 2016 were as follows:

	Brands with an indefinite useful life £m			Acquired intangibles £m			Other £m			Total £m
Cost:
1 January 2016		968.1			2,007.1			331.0			3,306.2
Additions		–			–			33.0			33.0
Disposals		–			(0.8	)		(42.2	)		(43.0	)
New acquisitions		–			319.1			10.5			329.6
Other movements1		–			11.6			4.7			16.3
Exchange adjustments		173.2			198.5			67.1			438.8
31 December 2016		1,141.3			2,535.5			404.1			4,080.9
Additions		–			–			37.3			37.3
Disposals		–			–			(15.8	)		(15.8	)
New acquisitions		–			79.0			0.8			79.8
Other movements1		–			6.4			7.2			13.6
Exchange adjustments		(60.0	)		(73.1	)		(22.1	)		(155.2	)
31 December 2017		1,081.3			2,547.8			411.5			4,040.6
Amortisation and impairment:
1 January 2016		–			1,339.5			251.3			1,590.8
Charge for the year		–			163.3			38.6			201.9
Disposals		–			(0.4	)		(39.5	)		(39.9	)
Other movements		–			–			2.0			2.0
Exchange adjustments		–			60.6			48.2			108.8
31 December 2016		–			1,563.0			300.6			1,863.6
Charge for the year		–			189.4			36.3			225.7
Disposals		–			–			(14.9	)		(14.9	)
Other movements		–			–			2.5			2.5
Exchange adjustments		–			(33.7	)		(21.0	)		(54.7	)
31 December 2017		–			1,718.7			303.5			2,022.2
Net book value:
31 December 2017		1,081.3			829.1			108.0			2,018.4
31 December 2016		1,141.3			972.5			103.5			2,217.3
1 January 2016		968.1			667.6			79.7			1,715.4

Note

¹  Other movements in acquired intangibles include revisions to fair value adjustments arising on the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

Brands with an indefinite life are carried at historical cost in accordance with the Group’s accounting policy for intangible assets. The carrying values of the separately identifiable brands are not individually significant in comparison with the total carrying value of brands with an indefinite useful life.

Acquired intangible assets at net book value at 31 December 2017 include brand names of £445.6 million (2016: £486.2 million), customer-related intangibles of £360.9 million (2016: £448.9 million), and other assets (including proprietary tools) of £22.6 million (2016: £37.4 million).

The total amortisation and impairment of acquired intangible assets of £195.1 million (2016: £168.4 million) includes £5.7 million (2016: £5.1 million) in relation to associates.

In accordance with the Group’s accounting policy, the carrying values of goodwill and intangible assets with indefinite useful lives are reviewed for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.

The impairment review is undertaken annually on 30 September. The review assessed whether the carrying value of goodwill and intangible assets with indefinite useful lives was supported by the net present value of future cash flows, using a pre-tax discount rate of 8.5% (2016: 8.5%) and management forecasts for a projection period of up to five years, followed by an assumed annual long-term growth rate of 3.0% (2016: 3.0%) and no assumed improvement in operating margin. Management have made the judgement that this long-term growth rate does not exceed the long-term average growth rate for the industry.

The goodwill impairment charge of £27.1 million (2016: £27.0 million) relates to a number of under-performing businesses in the Group, of which £nil (2016: £7.0 million) is in relation to associates. In certain markets, the impact of local economic conditions and trading circumstances on these businesses was sufficiently severe to indicate impairment to the carrying value of goodwill.

Under IFRS, an impairment charge is required for both goodwill and other indefinite-lived assets when the carrying amount exceeds the ‘recoverable amount’, defined as the higher of fair value less costs to sell and value in use.

Our approach in determining the recoverable amount utilises a discounted cash flow methodology, which necessarily involves making numerous estimates and assumptions regarding revenue growth, operating margins, appropriate discount rates and working capital requirements. The key assumptions used for estimating cash flow projections in the Group’s impairment testing are those relating to revenue growth and operating margin. The key assumptions take account of the businesses’ expectations for the projection period. These expectations consider the macroeconomic environment, industry and market conditions, the unit’s historical performance and any other circumstances particular to the unit, such as business strategy and client mix.

These estimates will likely differ from future actual results of operations and cash flows, and it is possible that these differences could be material. In addition, judgements are applied in determining the level of cash-generating unit identified for impairment testing and the criteria used to determine which assets should be aggregated. A difference in testing levels could affect whether an impairment is recorded and the extent of impairment loss. Changes in our business activities or structure may also result in changes to the level of testing in future periods. Further, future events could cause the Group to conclude that impairment indicators exist and that the asset values associated with a given operation have become impaired. Any resulting impairment loss could have a material impact on the Group’s financial condition and results of operations.

Historically our impairment losses have resulted from a specific event, condition or circumstance in one of our companies, such as the loss of a significant client. As a result, changes in the assumptions used in our impairment model have not had a significant effect on the impairment charges recognized. Burson-Marsteller is the only cash-generating unit with significant goodwill where a reasonably possible change in a key assumption on which the recoverable amount is based would cause the carrying amount to exceed its recoverable amount. The methodology above indicated an amount of £36.7 million as the excess of recoverable amount over carrying amount at 30 September 2017, with no further indicators of impairment by year-end. As announced in February 2018, Burson-Marsteller and Cohn & Wolfe were merged to create Burson Cohn & Wolfe, one of the world’s largest, full-service, global communications agencies. In accordance with IAS 36, this Group reorganisation was not taken account of in the impairment testing at 30 September 2017. Going forward, the respective goodwill for these cash-generating units will be aggregated and tested for impairment on a combined basis, aligning with the way in which the Group will monitor goodwill internally following the reorganisation. If these units had been tested in combination as of 30 September 2017, with all other inputs held constant, a reasonably possible change in assumptions for the Burson Cohn & Wolfe cash-generating unit would not cause the carrying amount to exceed the recoverable amount.

The carrying value of goodwill and other intangible assets will continue to be reviewed at least annually for impairment and adjusted down to the recoverable amount if required.

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Property, plant and equipment

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Property, plant and equipment

13. Property, plant and equipment

The movements in 2017 and 2016 were as follows:

	Land £m		Freehold buildings £m			Leasehold buildings £m			Fixtures, fittings and equipment £m			Computer equipment £m			Total £m
Cost:
1 January 2016		37.1		102.2			837.4			338.3			602.9			1,917.9
Additions		–		1.3			107.9			55.9			87.0			252.1
New acquisitions		–		–			7.9			6.5			6.2			20.6
Disposals		–		(0.3	)		(83.2	)		(46.1	)		(106.4	)		(236.0	)
Exchange adjustments		–		23.2			142.5			48.0			153.7			367.4
31 December 2016		37.1		126.4			1,012.5			402.6			743.4			2,322.0
Additions		–		4.3			165.0			31.7			87.9			288.9
New acquisitions		–		–			2.0			2.4			1.1			5.5
Disposals		–		(1.2	)		(46.1	)		(40.7	)		(54.6	)		(142.6	)
Exchange adjustments		–		(10.7	)		(51.6	)		(18.8	)		(74.8	)		(155.9	)
31 December 2017		37.1		118.8			1,081.8			377.2			703.0			2,317.9
Depreciation:
1 January 2016		–		19.2			423.2			208.9			468.9			1,120.2
Charge for the year		–		4.3			81.1			45.7			89.7			220.8
Disposals		–		(0.6	)		(77.8	)		(49.2	)		(101.4	)		(229.0	)
Exchange adjustments		–		2.3			83.3			34.6			121.1			241.3
31 December 2016		–		25.2			509.8			240.0			578.3			1,353.3
Charge for the year		–		6.9			86.7			47.0			90.1			230.7
Disposals		–		(1.9	)		(42.6	)		(35.9	)		(54.4	)		(134.8	)
Exchange adjustments		–		(1.7	)		(27.8	)		(14.2	)		(67.1	)		(110.8	)
31 December 2017		–		28.5			526.1			236.9			546.9			1,338.4
Net book value:
31 December 2017		37.1		90.3			555.7			140.3			156.1			979.5
31 December 2016		37.1		101.2			502.7			162.6			165.1			968.7
1 January 2016		37.1		83.0			414.2			129.4			134.0			797.7

At the end of the year, capital commitments contracted, but not provided for in respect of property, plant and equipment were £137.2 million (2016: £22.1 million). The increase is due to a number of significant property developments in North America.

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Interests in associates, joint ventures and other investments

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Interests in associates, joint ventures and other investments

14. Interests in associates, joint ventures and other investments

The movements in 2017 and 2016 were as follows:

	Net assets of associates and joint ventures £m			Goodwill and other intangibles of associates and joint ventures £m			Total associates and joint ventures £m			Other investments £m
1 January 2016		334.1			424.5			758.6			1,158.7
Additions		(1.3	)		–			(1.3	)		233.5
Goodwill arising on acquisition of new associates		–			292.2			292.2			–
Share of results of associate undertakings (note 4)		49.8			–			49.8			–
Dividends		(60.4	)		–			(60.4	)		–
Other movements		(45.3	)		52.4			7.1			–
Reclassification from other investments to associates		43.6			30.7			74.3			(74.3	)
Exchange adjustments		61.6			50.1			111.7			170.4
Disposals		(12.7	)		–			(12.7	)		(3.4	)
Reclassification to subsidiaries		(44.2	)		(88.8	)		(133.0	)		(0.2	)
Revaluation of other investments		–			–			–			(93.1	)
Amortisation of other intangible assets		–			(5.1	)		(5.1	)		–
Goodwill impairment		–			(7.0	)		(7.0	)		–
Write-downs		(4.8	)		–			(4.8	)		(81.3	)
31 December 2016		320.4			749.0			1,069.4			1,310.3
Additions		34.1			–			34.1			67.7
Goodwill arising on acquisition of new associates		–			0.4			0.4			–
Share of results of associate undertakings (note 4)		113.5			–			113.5			–
Dividends		(46.8	)		–			(46.8	)		–
Other movements		4.7			(1.3	)		3.4			–
Reclassification from other investments to associates		57.1			–			57.1			(57.1	)
Exchange adjustments		(7.3	)		(3.3	)		(10.6	)		(106.1	)
Disposals		(59.2	)		(79.9	)		(139.1	)		(1.7	)
Reclassification to subsidiaries		(3.4	)		(2.9	)		(6.3	)		–
Revaluation of other investments		–			–			–			32.1
Amortisation of other intangible assets		–			(5.7	)		(5.7	)		–
Write-downs		(4.2	)		–			(4.2	)		(91.7	)
31 December 2017		408.9			656.3			1,065.2			1,153.5

The investments included above as ‘other investments’ represent investments in equity securities that present the Group with opportunity for return through dividend income and trading gains. They have no fixed maturity or coupon rate. The fair values of the listed securities are based on quoted market prices.

For unlisted securities, where market value is not available, the Group has estimated relevant fair values on the basis of publicly available information from outside sources.

The carrying values of the Group’s associates and joint ventures are reviewed for impairment in accordance with the Group’s accounting policies.

The Group’s principal associates and joint ventures at 31 December 2017 included:

	% owned		Country of incorporation
Barrows Design and Manufacturing (Pty) Limited		35.0		South Africa
Bruin Sports Capital LLC		38.2		USA
Chime Communications Ltd		24.9		UK
CVSC Sofres Media Co Limited		40.0		China
GIIR Inc		30.0		Korea
Globant S.A.1		19.2		Argentina
Haworth Marketing & Media Company		49.0		USA
High Co SA		34.1		France
Imagina		23.5		Spain
Marktest Investimentos SGPS S.A.		43.1		Portugal
Richard Attias and Associates		49.0		USA
Smollan Holdings (Pty) Ltd		24.8		South Africa

Note

¹Although the Group holds less than 20% of Globant S.A, it is considered to be an associate as the Group exercises significant influence over the entity.

The market value of the Group’s shares in its principal listed associate undertakings at 31 December 2017 was as follows: GIIR Inc: £35.4 million, Globant SA: £229.7 million and High Co SA: £33.3 million (2016: GIIR Inc: £26.9 million, Globant SA: £180.7 million and High Co SA: £21.0 million).

The carrying value (including goodwill and other intangibles) of these equity interests in the Group’s consolidated balance sheet at 31 December 2017 was as follows: GIIR Inc: £41.6 million, Globant SA: £76.4 million and High Co SA: £34.5 million (2016: GIIR Inc: £37.9 million, Globant SA: £78.5 million and High Co SA: £31.4 million).

Where the market value of the Group’s listed associates is less than the carrying value, an impairment review is performed utilising the discounted cash flow methodology discussed in note 12.

The Group’s investments in its principal associate undertakings are represented by ordinary shares.

Summarised financial information

The following tables present a summary of the aggregate financial performance and net asset position of the Group’s associate undertakings and joint ventures. These have been estimated and converted, where appropriate, to an IFRS presentation based on information provided by the relevant companies at 31 December 2017.

	2017 £m			2016 £m			2015 £m
Income statement
Revenue		3,800.8			2,254.5			2,049.5
Operating profit		440.4			308.3			283.7
Profit before taxation		381.9			237.2			236.5
Profit for the year		312.5			156.7			162.0
	2017 £m			2016 £m			2015 £m
Balance sheet
Assets		3,192.9			4,223.1			3,912.4
Liabilities		(1,633.7	)		(1,900.0	)		(1,906.2	)
Net assets		1,559.2			2,323.1			2,006.2

The application of equity accounting is ordinarily discontinued when the investment is reduced to zero and additional losses are not provided for unless the Group has guaranteed obligations of the investee or is otherwise committed to provide further financial support for the investee.

At the end of the year, capital commitments contracted, but not provided for in respect of interests in associates and other investments were £54.2 million (2016: £89.2 million).

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Deferred tax

12 Months Ended

Dec. 31, 2017

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Deferred tax

15. Deferred tax

The Group’s deferred tax assets and liabilities are measured at the end of each period in accordance with IAS 12 Income taxes. The recognition of deferred tax assets is determined by reference to the Group’s estimate of recoverability, using models where appropriate to forecast future taxable profits.

Deferred tax assets have only been recognised for territories where the Group considers that it is probable there would be sufficient taxable profits for the future deductions to be utilised.

Based on available evidence, both positive and negative, we determine whether it is probable that all or a portion of the deferred tax assets will be realised. The main factors that we consider include:

– the future earnings potential determined through the use of internal forecasts;

– the cumulative losses in recent years;

– the various jurisdictions in which the potential deferred tax assets arise;

– the history of losses carried forward and other tax assets expiring;

– the timing of future reversal of taxable temporary differences;

– the expiry period associated with the deferred tax assets; and

– the nature of the income that can be used to realise the deferred tax asset.

If it is probable that some portion of these assets will not be realised, then no asset is recognised in relation to that portion.

If market conditions improve and future results of operations exceed our current expectations, our existing recognised deferred tax assets may be adjusted, resulting in future tax benefits. Alternatively, if market conditions deteriorate further or future results of operations are less than expected, future assessments may result in a determination that some or all of the deferred tax assets are not realisable. As a result, all or a portion of the deferred tax assets may need to be reversed.

Certain deferred tax assets and liabilities have been offset as they relate to the same tax group. The following is the analysis of the deferred tax balances for financial reporting purposes:

	Gross 2017 £m			Offset 2017 £m			As reported 2017 £m			Gross 2016 £m			Offset 2016 £m			As reported 2016 £m
Deferred tax assets		411.8			(251.5	)		160.3			598.0			(457.6	)		140.4
Deferred tax liabilities		(765.2	)		251.5			(513.7	)		(1,150.0	)		457.6			(692.4	)
		(353.4	)		–			(353.4	)		(552.0	)		–			(552.0	)

The following are the major gross deferred tax assets recognised by the Group and movements thereon in 2017 and 2016:

	Deferred compensation £m			Accounting provisions & accruals £m			Retirement benefit obligations £m			Property, plant & equipment £m			Tax losses & credits £m			Share- based payments £m			Restructuring provisions £m			Other temporary differences £m			Total £m
1 January 2016		41.9			49.5			91.0			44.7			71.3			78.8			16.9			16.6			410.7
Acquisition of subsidiaries		–			7.1			–			–			–			0.2			–			15.0			22.3
Credit/(charge) to income		39.5			8.5			28.3			19.2			6.2			(1.8	)		(11.7	)		7.7			95.9
Credit to other comprehensive income		–			–			1.8			–			–			–			–			–			1.8
Charge to equity		–			–			–			–			–			(15.0	)		–			–			(15.0	)
Exchange differences		14.2			15.5			20.3			6.9			12.2			13.6			0.7			(1.1	)		82.3
31 December 2016		95.6			80.6			141.4			70.8			89.7			75.8			5.9			38.2			598.0
Acquisition of subsidiaries		–			–			–			–			–			–			–			2.6			2.6
(Charge)/credit to income		(5.5	)		6.6			(10.2	)		6.9			(34.4	)		(0.4	)		(1.5	)		(21.7	)		(60.2	)
Impact of US tax reform		(30.8	)		(8.1	)		(29.1	)		(6.8	)		23.1			(10.9	)		1.6			(1.1	)		(62.1	)
Charge to other comprehensive income		–			–			(20.9	)		–			–			–			–			–			(20.9	)
Charge to equity		–			–			–			–			–			(27.3	)		–			–			(27.3	)
Exchange differences		(5.8	)		5.8			(5.6	)		(2.5	)		(5.7	)		(4.2	)		(0.2	)		(0.1	)		(18.3	)
31 December 2017		53.5			84.9			75.6			68.4			72.7			33.0			5.8			17.9			411.8

Other temporary differences comprise a number of items including tax deductible goodwill, none of which is individually significant to the Group’s consolidated balance sheet. At 31 December 2017 the balance related to temporary differences in relation to revenue adjustments, tax deductible goodwill, fair value adjustments, and other temporary differences.

In addition the Group has recognised the following gross deferred tax liabilities and movements thereon in 2017 and 2016:

	Brands and other intangibles £m			Associate earnings £m			Goodwill £m			Property, plant & equipment £m			Financial instruments £m			Other temporary differences £m			Total £m
1 January 2016		577.1			22.5			176.7			30.9			50.7			11.0			868.9
Acquisition of subsidiaries		114.8			–			–			–			–			–			114.8
(Credit)/charge to income		(51.3	)		3.1			23.5			(0.4	)		3.5			17.3			(4.3	)
Charge to other comprehensive income		–			–			–			–			–			2.2			2.2
Exchange differences		115.3			2.7			32.3			5.7			9.8			2.6			168.4
31 December 2016		755.9			28.3			232.5			36.2			64.0			33.1			1,150.0
Acquisition of subsidiaries		21.4			–			–			–			–			–			21.4
(Credit)/charge to income		(49.9	)		(6.0	)		0.7			(0.5	)		(3.3	)		5.1			(53.9	)
Impact of US tax reform		(203.8	)		–			(76.3	)		(11.9	)		(22.2	)		18.0			(296.2	)
Charge to other comprehensive income		–			–			–			–			–			3.7			3.7
Exchange differences		(34.4	)		(0.7	)		(16.5	)		(2.6	)		(2.3	)		(3.3	)		(59.8	)
31 December 2017		489.2			21.6			140.4			21.2			36.2			56.6			765.2

At the balance sheet date, the Group has gross tax losses and other temporary differences of £4,709.2 million (2016: £5,153.2 million) available for offset against future profits. Deferred tax assets have been recognised in respect of the tax benefit of £1,539.3 million (2016: £1,104.4 million) of such tax losses and other temporary differences. No deferred tax asset has been recognised in respect of the remaining £3,169.9 million (2016: £4,048.8 million) of losses and other temporary differences as the Group considers that there will not be enough taxable profits in the entities concerned such that any additional asset could be considered recoverable. Included in the total unrecognised temporary differences are losses of £33.4 million that will expire within 1-10 years, and £2,945.2 million of losses that may be carried forward indefinitely.

At the balance sheet date, the aggregate amount of the temporary differences in relation to the investment in subsidiaries for which deferred tax liabilities have not been recognised was £3,898.0 million (2016: £3,270.8 million). No liability has been recognised in respect of these differences because the Group is in a position to control the timing of the reversal of the temporary differences and the Group considers that it is probable that such differences will not reverse in the foreseeable future.

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Inventory and work in progress

12 Months Ended

Dec. 31, 2017

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Inventory and work in progress

16. Inventory and work in progress

The following are included in the net book value of inventory and work in progress:

	2017 £m		2016 £m
Work in progress		401.1		383.1
Inventory		23.2		17.3
		424.3		400.4

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Trade and other receivables

12 Months Ended

Dec. 31, 2017

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Trade and other receivables

17. Trade and other receivables

The following are included in trade and other receivables:

Amounts falling due within one year:

	2017 £m		2016 £m
Trade receivables (net of bad debt provision)		7,889.7		8,054.2
VAT and sales taxes recoverable		202.3		157.2
Prepayments		298.3		310.0
Accrued income		3,211.7		3,353.8
Fair value of derivatives		1.0		14.7
Other debtors		509.3		484.6
		12,112.3		12,374.5

The ageing of trade receivables and other financial assets is as follows:

2017	Carrying amount at 31 December 2017 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days  £m		91-180 days  £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		7,889.7		5,466.6		1,629.6		577.0		143.0		48.8		24.7
Other financial assets		500.4		331.2		107.0		6.6		4.7		10.3		40.6
		8,390.1		5,797.8		1,736.6		583.6		147.7		59.1		65.3
2016	Carrying amount at 31 December 2016 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days  £m		91-180 days  £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		8,054.2		5,545.6		1,611.0		683.6		156.6		37.2		20.2
Other financial assets		504.5		335.0		91.3		16.3		6.7		11.9		43.3
		8,558.7		5,880.6		1,702.3		699.9		163.3		49.1		63.5

Other financial assets are included in other debtors.

Past due amounts are not impaired where collection is considered likely.

Amounts falling due after more than one year:

	2017 £m		2016 £m
Prepayments		3.6		3.7
Accrued income		20.5		9.5
Fair value of derivatives		2.1		8.3
Other debtors		150.0		183.4
		176.2		204.9

Bad debt provisions:

	2017 £m			2016 £m			2015 £m
Balance at beginning of year		93.8			85.4			85.3
New acquisitions		1.2			1.8			1.0
Charged to operating costs		27.4			15.5			21.6
Exchange adjustments		(4.1	)		13.7			0.2
Utilisations and other movements		(27.0	)		(22.6	)		(22.7	)
Balance at end of year		91.3			93.8			85.4

The allowance for bad and doubtful debts is equivalent to 1.1% (2016: 1.2%, 2015: 1.2%) of gross trade accounts receivables.

The Group considers that the carrying amount of trade and other receivables approximates their fair value.

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Trade and other payables: amounts falling due within one year

12 Months Ended

Dec. 31, 2017

Within one year [member]

Trade and other payables: amounts falling due within one year

18. Trade and other payables: amounts falling due within one year

The following are included in trade and other payables falling due within one year:

	2017 £m		2016 £m
Trade payables		9,893.0		10,308.3
Deferred income		1,212.1		1,312.7
Payments due to vendors (earnout agreements)		180.7		277.5
Liabilities in respect of put option agreements with vendors		38.6		51.0
Fair value of derivatives		3.5		4.1
Other creditors and accruals		2,913.2		3,056.8
		14,241.1		15,010.4

The Group considers that the carrying amount of trade and other payables approximates their fair value.

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Trade and other payables: amounts falling due after more than one year

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Trade and other payables: amounts falling due after more than one year

19. Trade and other payables: amounts falling due after more than one year

The following are included in trade and other payables falling due after more than one year:

	2017 £m		2016 £m
Payments due to vendors (earnout agreements)		450.0		699.0
Liabilities in respect of put option agreements with vendors		219.5		246.0
Fair value of derivatives		3.3		1.8
Other creditors and accruals		320.0		327.0
		992.8		1,273.8

The Group considers that the carrying amount of trade and other payables approximates their fair value.

The following tables set out payments due to vendors, comprising contingent consideration and the directors’ best estimates of future earnout-related obligations:

	2017 £m			2016 £m
Within one year		180.7			277.5
Between one and two years		128.3			220.1
Between two and three years		144.1			170.2
Between three and four years		58.3			176.6
Between four and five years		103.1			122.4
Over five years		16.2			9.7
		630.7			976.5
	2017 £m			2016 £m
At beginning of year		976.5			581.3
Earnouts paid (note 11)		(199.1	)		(92.3	)
New acquisitions		163.7			359.5
Revision of estimates taken to goodwill (note 12)		(60.7	)		28.4
Revaluation of payments due to vendors (note 6)		(208.6	)		11.6
Exchange adjustments		(41.1	)		88.0
At end of year		630.7			976.5

As of 31 December 2017, the potential undiscounted amount of future payments that could be required under the earnout agreements for acquisitions completed in the current year and for all earnout agreements range from £nil to £228 million (2016: £nil to £453 million) and £nil to £1,910 million (2016: £nil to £2,108 million), respectively. The decrease in the maximum potential undiscounted amount of future payments for all earnout agreements is due to earnout arrangements that have completed and payments made on active arrangements during the year and exchange adjustments, partially offset by earnout arrangements related to new acquisitions.

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Bank overdrafts, bonds and bank loans

12 Months Ended

Dec. 31, 2017

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Bank overdrafts, bonds and bank loans

20. Bank overdrafts, bonds and bank loans

Amounts falling due within one year:

	2017 £m		2016 £m
Bank overdrafts		393.2		534.3
Corporate bonds and bank loans		230.9		468.2
		624.1		1,002.5

The Group considers that the carrying amount of bank overdrafts approximates their fair value.

Amounts falling due after more than one year:

	2017 £m		2016 £m
Corporate bonds and bank loans		6,250.4		5,564.9

The Group estimates that the fair value of corporate bonds is £5,816.5 million at 31 December 2017 (2016: £6,101.4 million). The fair values of the corporate bonds are based on quoted market prices. The Group considers that the carrying amount of bank loans of £993.4 million (2016: £272.1 million) approximates their fair value.

The corporate bonds, bank loans and overdrafts included within liabilities fall due for repayment as follows:

	2017 £m		2016 £m
Within one year		624.1		1,002.5
Between one and two years		727.6		208.0
Between two and three years		421.0		717.2
Between three and four years		1,384.2		195.7
Between four and five years		356.6		660.9
Over five years		3,361.0		3,783.1
		6,874.5		6,567.4

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Provisions for liabilities and charges

12 Months Ended

Dec. 31, 2017

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Provisions for liabilities and charges

21. Provisions for liabilities and charges

The movements in 2017 and 2016 were as follows:

	Property £m			Other £m			Total £m
1 January 2016		52.7			130.9			183.6
Charged to the income statement		5.8			14.5			20.3
Acquisitions1		11.1			3.9			15.0
Utilised		(14.7	)		(18.1	)		(32.8	)
Released to the income statement		(2.9	)		(3.7	)		(6.6	)
Transfers		(1.6	)		14.6			13.0
Exchange adjustments		8.1			27.3			35.4
31 December 2016		58.5			169.4			227.9
Charged to the income statement		4.1			16.9			21.0
Acquisitions1		4.0			22.8			26.8
Utilised		(6.0	)		(21.4	)		(27.4	)
Released to the income statement		(5.5	)		(5.9	)		(11.4	)
Transfers		0.1			7.1			7.2
Exchange adjustments		(2.6	)		(12.5	)		(15.1	)
31 December 2017		52.6			176.4			229.0

Note

¹  Acquisitions include £21.9 million (2016: £3.4 million) of provisions arising from revisions to fair value adjustments related to the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

Provisions comprise liabilities where there is uncertainty about the timing of settlement, but where a reliable estimate can be made of the amount. These include provisions for vacant space, sub-let losses and other property-related liabilities. Also included are other provisions, such as certain long-term employee benefits and legal claims, where the likelihood of settlement is considered probable.

The Company and various of its subsidiaries are, from time to time, parties to legal proceedings and claims which arise in the ordinary course of business. The directors do not anticipate that the outcome of these proceedings and claims will have a material adverse effect on the Group’s financial position or on the results of its operations.

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Share-based payments

12 Months Ended

Dec. 31, 2017

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Share-based payments

22. Share-based payments

Charges for share-based incentive plans were as follows:

	2017 £m		2016 £m		2015 £m
Share-based payments (note 5)		105.0		106.5		99.0

Share-based payments comprise charges for stock options and restricted stock awards to employees of the Group.

As of 31 December 2017, there was £156.0 million (2016: £175.9 million) of total unrecognised compensation cost related to the Group’s restricted stock plans. That cost is expected to be recognised over an average period of one to two years.

Further information on stock options is provided in note 26.

Restricted stock plans

The Group operates a number of equity-settled share incentive schemes, in most cases satisfied by the delivery of stock from one of the Group’s ESOP Trusts. The most significant current schemes are as follows:

Leadership Equity Acquisition Plan III (LEAP III)

Under LEAP III, the most senior executives of the Group, including certain Executive Directors, commit WPP shares (‘investment shares’) in order to have the opportunity to earn additional WPP shares (‘matching shares’). The number of matching shares which a participant can receive at the end of the fixed performance period of five years is dependent on the performance (based on the Total Shareholder Return (TSR)) of the Company over that period against a comparator group of other listed communications services companies. The 2012 LEAP III plan vested in March 2017 at a match of 5.0 shares for each investment share, the maximum match possible. The last LEAP III award was granted in 2012 and no further awards will be made following the introduction of the EPSP.

Executive Performance Share Plan (EPSP)

The first grant of restricted stock under the EPSP was made in 2013. This scheme is intended to reward and incentivise the most senior executives of the Group and has effectively replaced LEAP III. The performance period is five complete financial years, commencing with the financial year in which the award is granted. The vest date will usually be in the March following the end of the five-year performance period. Vesting is conditional on continued employment throughout the vesting period.

There are three performance criteria, each constituting one-third of the vesting value, and each measured over this five-year period: (i) TSR against a comparator group of companies. Threshold performance (equating to ranking in the 50th percentile of the comparator group) will result in 20% vesting of the part of the award dependent on TSR. The maximum vest of 100% will arise if performance ranks in the 90th percentile, with a sliding scale of vesting for performance between threshold and maximum.

(ii) Headline diluted earnings per share. Threshold performance (7% compound annual growth) will again result in a 20% vest. Maximum performance of 14% compound annual growth will give rise to a 100% vest, with a sliding vesting scale for performance between threshold and maximum.

(iii) Return on equity (ROE). Average annual ROE defined as headline diluted EPS divided by the balance sheet value per share of share owners’ equity. Threshold performance ranges between 10-14% average annual ROE and maximum performance ranges between 14-18%, with a sliding scale in between. Threshold again gives rise to a 20% vest, 100% for maximum, with a sliding scale in between.

Performance Share Awards (PSA)

Grants of restricted stock under PSA are dependent upon annual performance targets, typically based on one or more of: operating profit, profit before taxation and operating margin. Grants are made in the year following the year of performance measurement, and vest two years after grant date provided the individual concerned is continually employed by the Group throughout this time.

Leaders, Partners and High Potential Group

This scheme provides annual grants of restricted stock to 1,800 key executives of the Group. Vesting is conditional on continued employment over the three-year vesting period.

Valuation methodology

For all of these schemes, the valuation methodology is based upon fair value on grant date, which is determined by the market price on that date or the application of a Black-Scholes model, depending upon the characteristics of the scheme concerned. The assumptions underlying the Black-Scholes model are detailed in note 26, including details of assumed dividend yields. Market price on any given day is obtained from external, publicly available sources.

Market/non-market conditions

Most share-based plans are subject to non-market performance conditions, such as margin or growth targets, as well as continued employment. LEAP III and EPSP schemes are subject to a number of performance conditions, including TSR, a market-based condition.

For schemes without market-based performance conditions, the valuation methodology above is applied and, at each year end, the relevant accrual for each grant is revised, if appropriate, to take account of any changes in estimate of the likely number of shares expected to vest.

For schemes with market-based performance conditions, the probability of satisfying these conditions is assessed at grant date through a statistical model (such as the Monte Carlo Model) and applied to the fair value. This initial valuation remains fixed throughout the life of the relevant plan, irrespective of the actual outcome in terms of performance. Where a lapse occurs due to cessation of employment, the cumulative charge taken to date is reversed.

Movement on ordinary shares granted for significant restricted stock plans:

Non-vested 1 January 2017 number m

Granted number m

Lapsed number m

Vested number m

Non-vested 31 December 2017 number m

LEAP III1

0.8

4.0

–

(4.8

)

–

Executive Performance Share Plan (EPSP)

8.0

2.0

(0.9

)

–

9.1

Performance Share Awards (PSA)

1.2

1.2

(0.2

)

(0.3

)

1.9

Leaders, Partners and High Potential Group

6.4

3.1

(0.7

)

(2.0

)

6.8

Weighted average fair value (pence per share):

LEAP III1

860p

860p

–

860p

–

Executive Performance Share Plan (EPSP)

1,373p

1,309p

1,286p

–

1,368p

Performance Share Awards (PSA)

1,596p

1,681p

1,648p

1,504p

1,659p

Leaders, Partners and High Potential Group

1,534p

1,250p

1,518p

1,214p

1,502p

Note

¹  The number of shares granted represents the matched shares awarded on vest date for the 2012 LEAP III plan which vested in March 2017. The actual number of shares that vest for each LEAP III plan is dependent on the extent to which the relevant performance criteria are satisfied.

The total fair value of shares vested for all the Group’s restricted stock plans during the year ended 31 December 2017 was £114.8 million (2016: £116.8 million, 2015: £111.7 million).

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Provision for post-employment benefits

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Provision for post-employment benefits

23. Provision for post-employment benefits

Companies within the Group operate a large number of pension plans, the forms and benefits of which vary with conditions and practices in the countries concerned. The Group’s pension costs are analysed as follows:

	2017 £m		2016 £m		2015 £m
Defined contribution plans		175.9		153.5		135.0
Defined benefit plans charge to operating profit		16.1		24.6		25.0
Pension costs (note 5)		192.0		178.1		160.0
Net interest expense on pension plans (note 6)		6.3		6.7		7.3
		198.3		184.8		167.3

Defined benefit plans

The pension costs are assessed in accordance with the advice of local independent qualified actuaries. The latest full actuarial valuations for the various pension plans were carried out at various dates in the last three years. These valuations have been updated by the local actuaries to 31 December 2017.

The Group’s policy is to close existing defined benefit plans to new members. This has been implemented across a significant number of the pension plans.

Contributions to funded plans are determined in line with local conditions and practices. Contributions in respect of unfunded plans are paid as they fall due. The total contributions (for funded plans) and benefit payments (for unfunded plans) paid for 2017 amounted to £68.2 million (2016: £43.7 million, 2015: £70.9 million). Employer contributions and benefit payments in 2018 are expected to be approximately £70 million.

(a) Assumptions

There are a number of areas in pension accounting that involve estimates made by management based on advice of qualified advisors. These include establishing the discount rates, rates of increase in salaries and pensions in payment, inflation, and mortality assumptions. The main weighted average assumptions used for the actuarial valuations at 31 December are shown in the following table:

	2017 % pa		2016 % pa		2015 % pa		2014 % pa
UK
Discount rate1		2.4		2.5		3.7		3.4
Rate of increase in salaries2		n/a		3.5		3.1		3.1
Rate of increase in pensions in payment		4.1		4.1		3.9		3.9
Inflation		2.7		2.8		2.4		2.4
North America
Discount rate1		3.5		3.8		4.0		3.7
Rate of increase in salaries		3.1		3.1		3.0		3.0
Inflation		4.0		4.0		2.5		2.5
Western Continental Europe
Discount rate1		1.9		1.7		2.5		2.1
Rate of increase in salaries		1.9		2.0		2.3		2.2
Rate of increase in pensions in payment		1.2		1.3		1.6		2.0
Inflation		1.7		1.7		2.0		2.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe
Discount rate1		4.2		4.2		4.2		4.2
Rate of increase in salaries		5.5		5.9		5.8		6.1
Inflation		4.0		4.0		4.0		3.9

Notes

¹  Discount rates are based on high-quality corporate bond yields. In countries where there is no deep market in corporate bonds, the discount rate assumption has been set with regard to the yield on long-term government bonds.

²  The salary assumptions are no longer applicable to the UK as the plans were frozen in 2017. Active participants will not accrue additional benefits for future services under these plans.

For the Group’s pension plans, the plans’ assets are invested with the objective of being able to meet current and future benefit payment needs, while controlling balance sheet volatility and future contributions. Pension plan assets are invested with a number of investment managers, and assets are diversified among equities, bonds, insured annuities, property and cash or other liquid investments. The primary use of bonds as an investment class is to match the anticipated cash flows from the plans to pay pensions. The Group is invested in high-quality corporate and government bonds which share similar risk characteristics and are of equivalent currency and term to the plan liabilities. Various insurance policies have also been bought historically to provide a more exact match for the cash flows, including a match for the actual mortality of specific plan members. These insurance policies effectively provide protection against both investment fluctuations and longevity risks. The strategic target allocation varies among the individual plans.

Management considers the types of investment classes in which the pension plan assets are invested. The types of investment classes are determined by economic and market conditions and in consideration of specific asset class risk.

Management periodically commissions detailed asset and liability studies performed by third-party professional investment advisors and actuaries that generate probability-adjusted expected future returns on those assets. These studies also project the estimated future pension payments and evaluate the efficiency of the allocation of the pension plan assets into various investment categories.

At 31 December 2017, the life expectancies underlying the value of the accrued liabilities for the main defined benefit pension plans operated by the Group were as follows:

Years life expectancy after age 65	All plans		North America		UK		Western Continental Europe		Other1
– current pensioners (at age 65) – male		22.4		22.1		23.4		20.8		19.6
– current pensioners (at age 65) – female		24.0		23.6		24.4		24.0		24.8
– future pensioners (current age 45) – male		23.8		23.7		25.0		23.1		19.6
– future pensioners (current age 45) – female		25.7		25.2		26.2		26.2		24.8

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

The life expectancies after age 65 at 31 December 2016 were 22.8 years and 24.5 years for male and female current pensioners (at age 65) respectively, and 24.7 years and 26.5 years for male and female future pensioners (current age 45), respectively.

In the determination of mortality assumptions, management uses the most up-to-date mortality tables available in each country.

The following table provides information on the weighted average duration of the defined benefit pension obligations and the distribution of the timing of benefit payments for the next 10 years. The duration corresponds to the weighted average length of the underlying cash flows.

	All plans		North America		UK		Western Continental Europe		Other1
Weighted average duration of the defined benefit obligation (years)		12.5		9.2		14.5		15.7		8.7
Expected benefit payments over the next 10 years (£m)
Benefits expected to be paid within 12 months		65.2		35.9		17.8		8.8		2.7
Benefits expected to be paid in 2019		61.8		33.4		17.4		8.5		2.5
Benefits expected to be paid in 2020		61.2		32.5		17.8		8.5		2.4
Benefits expected to be paid in 2021		62.3		32.0		18.4		8.9		3.0
Benefits expected to be paid in 2022		61.3		31.0		18.4		9.1		2.8
Benefits expected to be paid in the next five years		302.2		132.8		96.3		51.7		21.4

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

The following table presents a sensitivity analysis for each significant actuarial assumption showing how the defined benefit obligation would have been affected by changes in the relevant actuarial assumption that were reasonably possible at the balance sheet date. This sensitivity analysis applies to the defined benefit obligation only and not to the net defined benefit pension liability in its entirety, the measurement of which is driven by a number of factors including, in addition to the assumptions below, the fair value of plan assets.

The sensitivity analyses are based on a change in one assumption while holding all other assumptions constant so that interdependencies between the assumptions are excluded. The methodology applied is consistent with that used to determine the recognised defined benefit obligation. The sensitivity analysis for inflation is not shown as it is an underlying assumption to build the pension and salary increase assumptions. Changing the inflation assumption on its own without changing the salary or pension assumptions will not result in a significant change in pension liabilities.

	Increase/(decrease) in benefit obligation
Sensitivity analysis of significant actuarial assumptions	2017 £m			2016 £m
Discount rate
Increase by 25 basis points
UK		(13.1	)		(13.3	)
North America		(9.9	)		(10.9	)
Western Continental Europe		(9.2	)		(10.1	)
Other1		(0.6	)		(0.6	)
Decrease by 25 basis points
UK		13.8			14.1
North America		10.2			11.2
Western Continental Europe		9.8			10.6
Other1		0.6			0.6
Rate of increase in salaries
Increase by 25 basis points
UK		–			0.2
North America		0.1			–
Western Continental Europe		1.5			1.4
Other1		0.6			0.6
Decrease by 25 basis points
UK		–			(0.2	)
North America		(0.1	)		–
Western Continental Europe		(1.5	)		(1.4	)
Other1		(0.6	)		(0.6	)
Rate of increase in pensions in payment
Increase by 25 basis points
UK		2.4			2.3
Western Continental Europe		6.2			6.8
Decrease by 25 basis points
UK		(1.9	)		(2.3	)
Western Continental Europe		(5.8	)		(6.4	)
Life expectancy
Increase in longevity by one additional year
UK		16.9			17.7
North America		6.0			6.2
Western Continental Europe		7.0			7.4
Other1		–			–

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

(b) Assets and liabilities

At 31 December, the fair value of the assets in the pension plans, and the assessed present value of the liabilities in the pension plans are shown in the following table:

	2017 £m			%		2016 £m			%		2015 £m			%
Equities		124.6			13.4		161.9			17.3		132.5			16.3
Bonds		520.0			55.9		566.0			60.6		479.5			58.9
Insured annuities		178.5			19.2		63.5			6.8		60.5			7.4
Property		1.3			0.1		1.6			0.2		1.5			0.2
Cash		9.9			1.1		44.9			4.8		65.1			8.0
Other		95.7			10.3		96.3			10.3		75.1			9.2
Total fair value of assets		930.0			100.0		934.2			100.0		814.2			100.0
Present value of liabilities		(1,135.4	)				(1,209.8	)				(1,039.9	)
Deficit in the plans		(205.4	)				(275.6	)				(225.7	)
Irrecoverable surplus		(0.9	)				(0.9	)				(3.6	)
Net liability1		(206.3	)				(276.5	)				(229.3	)
Plans in surplus		43.9					28.0					31.4
Plans in deficit		(250.2	)				(304.5	)				(260.7	)

Note

¹  The related deferred tax asset is discussed in note 15.

All plan assets have quoted prices in active markets with the exception of insured annuities and other assets.

Surplus/(deficit) in plans by region	2017 £m			2016 £m			2015 £m
UK		31.5			20.0			30.9
North America		(89.2	)		(133.8	)		(123.4	)
Western Continental Europe		(107.7	)		(116.9	)		(97.4	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(40.0	)		(44.9	)		(35.8	)
Deficit in the plans		(205.4	)		(275.6	)		(225.7	)

Some of the Group’s defined benefit plans are unfunded (or largely unfunded) by common custom and practice in certain jurisdictions. In the case of these unfunded plans, the benefit payments are made as and when they fall due. Pre-funding of these plans would not be typical business practice.

The following table shows the split of the deficit at 31 December between funded and unfunded pension plans.

	2017 Surplus/ (deficit) £m			2017 Present value of liabilities £m			2016 Surplus/ (deficit) £m			2016 Present value of liabilities £m			2015 Surplus/ (deficit) £m			2015 Present value of liabilities £m
Funded plans by region
UK		31.5			(387.5	)		20.0			(406.4	)		30.9			(352.6	)
North America		(21.4	)		(385.4	)		(56.0	)		(420.4	)		(45.5	)		(364.5	)
Western Continental Europe		(37.9	)		(173.3	)		(48.9	)		(180.9	)		(42.3	)		(143.9	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(4.2	)		(15.8	)		(5.8	)		(17.2	)		(4.9	)		(15.0	)
Deficit/ liabilities in the funded plans		(32.0	)		(962.0	)		(90.7	)		(1,024.9	)		(61.8	)		(876.0	)
Unfunded plans by region
UK		–			–			–			–			–			–
North America		(67.8	)		(67.8	)		(77.8	)		(77.8	)		(77.9	)		(77.9	)
Western Continental Europe		(69.8	)		(69.8	)		(68.0	)		(68.0	)		(55.1	)		(55.1	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(35.8	)		(35.8	)		(39.1	)		(39.1	)		(30.9	)		(30.9	)
Deficit/ liabilities in the unfunded plans		(173.4	)		(173.4	)		(184.9	)		(184.9	)		(163.9	)		(163.9	)
Deficit/ liabilities in the plans		(205.4	)		(1,135.4	)		(275.6	)		(1,209.8	)		(225.7	)		(1,039.9	)

In accordance with IAS 19, plans that are wholly or partially funded are considered funded plans.

(c) Pension expense

The following table shows the breakdown of the pension expense between amounts charged to operating profit, amounts charged to finance costs and amounts recognised in the consolidated statement of comprehensive income (OCI):

	2017 £m			2016 £m			2015 £m
Service cost1		13.0			22.4			23.0
Administrative expenses		3.1			2.2			2.0
Charge to operating profit		16.1			24.6			25.0
Net interest expense on pension plans		6.3			6.7			7.3
Charge to profit before taxation for defined benefit plans		22.4			31.3			32.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Changes in demographic assumptions underlying the present value of the plan liabilities		12.7			6.7			13.8
Changes in financial assumptions underlying the present value of the plan liabilities		(17.0	)		(92.6	)		55.4
Experience gain/(loss) arising on the plan liabilities		7.9			1.0			(1.3	)
Change in irrecoverable surplus		–			2.7			(2.7	)
Actuarial gain/(loss) recognised in OCI		17.0			(15.9	)		33.5

Note

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

(d) Movement in plan liabilities

The following table shows an analysis of the movement in the pension plan liabilities for each accounting period:

	2017 £m			2016 £m			2015 £m
Plan liabilities at beginning of year		1,209.8			1,039.9			1,144.8
Service cost1		13.0			22.4			23.0
Interest cost		32.9			37.2			34.6
Actuarial (gain)/loss
Effect of changes in demographic assumptions		(12.7	)		(6.7	)		(13.8	)
Effect of changes in financial assumptions		17.0			92.6			(55.4	)
Effect of experience adjustments		(7.9	)		(1.0	)		1.3
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Gain)/loss due to exchange rate movements		(36.4	)		124.2			13.4
Settlement payments		(1.2	)		(4.8	)		–
Other2		0.6			(1.6	)		4.6
Plan liabilities at end of year		1,135.4			1,209.8			1,039.9

Notes

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

²  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

(e) Movement in plan assets

The following table shows an analysis of the movement in the pension plan assets for each accounting period:

	2017 £m			2016 £m			2015 £m
Fair value of plan assets at beginning of year		934.2			814.2			849.5
Interest income on plan assets		26.6			30.5			27.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Employer contributions		68.2			43.7			70.9
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Loss)/gain due to exchange rate movements		(28.7	)		78.8			12.4
Settlement payments		(1.2	)		(4.8	)		–
Administrative expenses		(3.1	)		(2.2	)		(2.0	)
Other1		0.3			0.1			0.4
Fair value of plan assets at end of year		930.0			934.2			814.2
Actual return on plan assets		40.0			96.8			(4.4	)

Note

¹  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

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Risk management policies

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Risk management policies

24. Risk management policies

Foreign currency risk

The Group’s results in pounds sterling are subject to fluctuation as a result of exchange rate movements. The Group does not hedge this translation exposure to its earnings but does hedge the currency element of its net assets using foreign currency borrowings, cross-currency swaps and forward foreign exchange contracts.

The Group effects these currency net asset hedges by borrowing in the same currencies as the operating (or ‘functional’) currencies of its main operating units. The majority of the Group’s debt is therefore denominated in US dollars, pounds sterling and euros. The Group’s borrowings at 31 December 2017 were primarily made up of $3,931 million, £600 million and €3,202 million (2016: $2,862 million, £1,000 million and €2,952 million). The Group’s average gross debt during the course of 2017 was $3,741 million, £1,242 million and €3,108 million (2016: $3,182 million, £781 million and €3,132 million).

The Group’s operations conduct the majority of their activities in their own local currency and consequently the Group has no significant transactional foreign exchange exposures arising from its operations. Any significant cross-border trading exposures are hedged by the use of forward foreign-exchange contracts. No speculative foreign exchange trading is undertaken.

Interest rate risk

The Group is exposed to interest rate risk on both interest-bearing assets and interest-bearing liabilities. The Group has a policy of actively managing its interest rate risk exposure while recognising that fixing rates on all its debt eliminates the possibility of benefiting from rate reductions and similarly, having all its debt at floating rates unduly exposes the Group to increases in rates.

Including the effect of interest rate and cross-currency swaps, 39.4% of the year-end US dollar debt is at fixed rates averaging 4.62% for an average period of 199 months; 60.6% of the year end US dollar debt is at floating rates averaging 3.19% for an average period of 29 months; 100% of the sterling debt is at a fixed rate of 4.04% for an average period of 245 months; 92.2% of the euro debt is at fixed rates averaging 1.85% for an average period of 80 months and 7.8% of the euro debt is at floating rates averaging 0% for an average of 29 months.

Going concern and liquidity risk

In considering going concern and liquidity risk, the directors have reviewed the Group’s future cash requirements and earnings projections. The directors believe these forecasts have been prepared on a prudent basis and have also considered the impact of a range of potential changes to trading performance. The directors have concluded that the Group should be able to operate within its current facilities and comply with its banking covenants for the foreseeable future and therefore believe it is appropriate to prepare the financial statements of the Group on a going concern basis.

At 31 December 2017, the Group has access to £7.7 billion of committed facilities with maturity dates spread over the years 2018 to 2046 as illustrated below:

	£m		2018 £m		2019 £m		2020 £m		2021 £m		2022+ £m
£ bonds £400m (2.875% ’46)		400.0										400.0
US bond $500m (5.625% ’43)		369.7										369.7
US bond $300m (5.125% ’42)		221.8										221.8
Eurobonds €600m (1.625% ’30)		533.3										533.3
Eurobonds €750m (2.25% ’26)		666.7										666.7
US bond $750m (3.75% ’24)		554.6										554.6
Eurobonds €750m (3.0% ’23)		666.7										666.7
US bond $500m (3.625% ’22)		369.7										369.7
US bond $812m (4.75% ’21)		600.7								600.7
Bank revolver ($2,500m)		1,848.6								1,848.6
£ bonds £200m (6.375% ’20)		200.0						200.0
Eurobonds €250m (3m EURIBOR + 0.32% ’20)		222.2						222.2
Eurobonds €600m (0.75% ’19)		533.3				533.3
Bank revolver (A$520m)		300.4				300.4
Eurobonds €252m (0.43% ’18)		224.0		224.0
Total committed facilities available		7,711.7		224.0		833.7		422.2		2,449.3		3,782.5
Drawn down facilities		6,547.9		224.0		729.1		422.2		1,390.1		3,782.5
Undrawn committed credit facilities		1,163.8

Given the strong cash generation of the business, its debt maturity profile and available facilities, the directors believe the Group has sufficient liquidity to match its requirements for the foreseeable future.

Treasury activities

Treasury activity is managed centrally from London, New York and Hong Kong, and is principally concerned with the monitoring of working capital, managing external and internal funding requirements and the monitoring and management of financial market risks, in particular interest rate and foreign exchange exposures.

The treasury operation is not a profit centre and its activities are carried out in accordance with policies approved by the Board of Directors and subject to regular review and audit.

The Group manages liquidity risk by ensuring continuity and flexibility of funding even in difficult market conditions. Undrawn committed borrowing facilities are maintained in excess of peak net-borrowing levels and debt maturities are closely monitored. Targets for debt less cash position are set on an annual basis and, to assist in meeting this, working capital targets are set for all the Group’s major operations.

Capital risk management

The Group manages its capital to ensure that entities in the Group will be able to continue as a going concern while maximising the return to stakeholders through the optimisation of the debt and equity balance. The capital structure of the Group consists of debt, which includes the borrowings disclosed in note 10, cash and cash equivalents and equity attributable to equity holders of the parent, comprising issued capital, reserves and retained earnings as disclosed in the consolidated statement of changes in equity and in notes 26 and 27.

Credit risk

The Group’s principal financial assets are cash and short-term deposits, trade and other receivables and investments, the carrying values of which represent the Group’s maximum exposure to credit risk in relation to financial assets, as shown in note 25.

The Group’s credit risk is primarily attributable to its trade receivables. The majority of the Group’s trade receivables are due from large national or multinational companies where the risk of default is considered low. The amounts presented in the consolidated balance sheet are net of allowances for doubtful receivables, estimated by the Group’s management based on prior experience and their assessment of the current economic environment. A relatively small number of clients make up a significant percentage of the Group’s debtors, but no single client represents more than 5% of total trade receivables as at 31 December 2017.

The credit risk on liquid funds and derivative financial instruments is limited because the counterparties are banks with high credit ratings assigned by international credit-rating agencies or banks that have been financed by their government.

A relatively small number of clients contribute a significant percentage of the Group’s consolidated revenues. The Group’s clients generally are able to reduce advertising and marketing spending or cancel projects at any time for any reason. There can be no assurance that any of the Group’s clients will continue to utilise the Group’s services to the same extent, or at all, in the future. A significant reduction in advertising and marketing spending by, or the loss of one or more of, the Group’s largest clients, if not replaced by new client accounts or an increase in business from existing clients, would adversely affect the Group’s prospects, business, financial condition and results of operations.

Sensitivity analysis

The following sensitivity analysis addresses the effect of currency and interest rate risks on the Group’s financial instruments. The analysis assumes that all hedges are highly effective.

Currency risk

At 31 December 2017, the Group’s major foreign currency denominated borrowings are held in individual entities with the same financial reporting currencies as borrowings. Therefore a weakening or strengthening of sterling against the Group’s major currencies would not result in any gains or losses being posted directly to equity and there would be no profit before tax impact.

Interest rate risk

A one percentage point increase in market interest rates for all currencies in which the Group had cash and borrowings at 31 December 2017 would increase profit before tax by approximately £0.2 million (2016: £4.5 million). A one percentage decrease in market interest rates would have an equal and opposite effect. This has been calculated by applying the interest rate change to the Group’s variable rate cash and borrowings.

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Financial instruments

12 Months Ended

Dec. 31, 2017

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Financial instruments

25. Financial instruments

Currency derivatives

The Group utilises currency derivatives to hedge significant future transactions and cash flows and the exchange risk arising on translation of the Group’s investments in foreign operations. The Group is a party to a variety of foreign currency derivatives in the management of its exchange rate exposures. The instruments purchased are primarily denominated in the currencies of the Group’s principal markets.

The Group designates its foreign currency-denominated debt as hedging instruments against the currency risk associated with the translation of its foreign operations.

During 2017, the Group held no currency derivatives designated as hedges.

At the balance sheet date, the total nominal amount of outstanding forward foreign exchange contracts not designated as hedges was £177.7 million (2016: £122.0 million). The Group estimates the fair value of these contracts to be a net liability of £2.5 million (2016: net asset of £0.1 million).

These arrangements are designed to address significant exchange exposure and are renewed on a revolving basis as required.

Interest rate swaps

The Group uses interest rate swaps as hedging instruments in fair value hedges to manage its exposure to interest rate movements on its borrowings. Contracts with a nominal value of $500 million have fixed interest receipts of 3.63% until September 2022 and have floating interest payments averaging LIBOR plus 1.52%. Contracts with a nominal value of $812 million have fixed interest receipts of 4.75% until November 2021 and have floating rate payments averaging LIBOR plus 2.34%.

The fair value of interest rate swaps entered into at 31 December 2017 is estimated to be a net liability of £1.2 million (2016: net asset of £17.0 million). These amounts are based on market values of equivalent instruments at the balance sheet date, comprising £2.1 million (2016: £20.0 million) assets included in trade and other receivables and £3.3 million (2016: £3.0 million) liabilities included in trade and other payables.

Changes in the fair value relating to the ineffective portion of interest rate swaps amounted to a gain of £2.8 million (2016: loss of £5.2 million, 2015: loss of £6.8 million) which is included in the revaluation of financial instruments for the year. This gain resulted from a £9.9 million loss on hedging instruments and a £12.7 million gain on hedged items.

An analysis of the Group’s financial assets and liabilities by accounting classification is set out below:

	Derivatives in designated hedge relationships		Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m		£m			£m		£m		£m			£m
2017
Other investments		–		–			–		1,153.5		–			1,153.5
Cash and short-term deposits		–		–			2,391.4		–		–			2,391.4
Bank overdrafts, bonds and bank loans		–		–			–		–		(624.1	)		(624.1	)
Bonds and bank loans		–		–			–		–		(6,250.4	)		(6,250.4	)
Trade and other receivables: amounts falling due within one year		–		–			8,328.4		–		–			8,328.4
Trade and other receivables: amounts falling due after more than one year		–		–			61.7		–		–			61.7
Trade and other payables: amounts falling due within one year		–		–			–		–		(9,970.5	)		(9,970.5	)
Trade and other payables: amounts falling due after more than one year		–		–			–		–		(8.5	)		(8.5	)
Derivative assets		2.1		1.0			–		–		–			3.1
Derivative liabilities		(3.3)		(3.5	)		–		–		–			(6.8	)
Payments due to vendors (earnout agreements) (note 19)		–		(630.7	)		–		–		–			(630.7	)
Liabilities in respect of put options		–		(258.1	)		–		–		–			(258.1	)
		(1.2)		(891.3	)		10,781.5		1,153.5		(16,853.5	)		(5,811.0	)

	Derivatives in designated hedge relationships			Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m			£m			£m		£m		£m			£m
2016
Other investments		–			–			–		1,310.3		–			1,310.3
Cash and short-term deposits		–			–			2,436.9		–		–			2,436.9
Bank overdrafts, bonds and bank loans		–			–			–		–		(1,002.5	)		(1,002.5	)
Bonds and bank loans		–			–			–		–		(5,564.9	)		(5,564.9	)
Trade and other receivables: amounts falling due within one year		–			–			8,468.8		–		–			8,468.8
Trade and other receivables: amounts falling due after more than one year		–			–			89.9		–		–			89.9
Trade and other payables: amounts falling due within one year		–			–			–		–		(10,398.9	)		(10,398.9	)
Trade and other payables: amounts falling due after more than one year		–			–			–		–		(8.4	)		(8.4	)
Derivative assets		20.0			3.0			–		–		–			23.0
Derivative liabilities		(3.0	)		(2.9	)		–		–		–			(5.9	)
Payments due to vendors (earnout agreements) (note 19)		–			(976.5	)		–		–		–			(976.5	)
Liabilities in respect of put options		–			(297.0	)		–		–		–			(297.0	)
		17.0			(1,273.4	)		10,995.6		1,310.3		(16,974.7	)		(5,925.2	)

The following table provides an analysis of financial instruments that are measured subsequent to initial recognition at fair value, grouped into levels 1 to 3 based on the degree to which the fair value is observable:

Level 1 fair value measurements are those derived from quoted prices (unadjusted) in active markets for identical assets or liabilities;

Level 2 fair value measurements are those derived from inputs other than quoted prices included within level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices);

Level 3 fair value measurements are those derived from valuation techniques that include inputs for the asset or liability that are not based on observable market data (unobservable inputs).

	Level 1 £m		Level 2 £m			Level 3 £m
2017
Derivatives in designated hedge relationships
Derivative assets		–		2.1			–
Derivative liabilities		–		(3.3	)		–
Held for trading
Derivative assets		–		1.0			–
Derivative liabilities		–		(3.5	)		–
Payments due to vendors (earnout agreements)  (note 19)		–		–			(630.7	)
Liabilities in respect of put options		–		–			(258.1	)
Available for sale
Other investments		333.2		–			820.3

	Level 1 £m		Level 2 £m			Level 3 £m
2016
Derivatives in designated hedge relationships
Derivative assets		–		20.0			–
Derivative liabilities		–		(3.0	)		–
Held for trading
Derivative assets		–		3.0			–
Derivative liabilities		–		(2.9	)		–
Payments due to vendors (earnout agreements)  (note 19)		–		–			(976.5	)
Liabilities in respect of put options		–		–			(297.0	)
Available for sale
Other investments		429.3		–			881.0

Reconciliation of level 3 fair value measurements¹:

	Liabilities in respect of put options £m			Other investments £m
1 January 2016		(234.4	)		847.3
Losses recognised in the income statement		(17.2	)		(1.6	)
Losses recognised in other comprehensive income		–			(105.6	)
Exchange adjustments		(47.4	)		112.9
Additions		(42.9	)		105.7
Disposals		–			(3.4	)
Reclassifications from other investments to interests in associates		–			(74.3	)
Settlements		44.9			–
31 December 2016		(297.0	)		881.0
Gains/(losses) recognised in the income statement		52.5			(13.8	)
Gains recognised in other comprehensive income		–			15.1
Exchange adjustments		7.5			(70.9	)
Additions		(40.5	)		67.7
Disposals		–			(1.7	)
Cancellations		2.9			–
Reclassifications from other investments to interests in associates		–			(57.1	)
Settlements		16.5			–
31 December 2017		(258.1	)		820.3

Note

¹  The reconciliation of payments due to vendors (earnout agreements) is presented in note 19.

The fair values of financial assets and liabilities are based on quoted market prices where available. Where the market value is not available, the Group has estimated relevant fair values on the basis of publicly available information from outside sources.

Payments due to vendors and liabilities in respect of put options

Future anticipated payments due to vendors in respect of contingent consideration (earnout agreements) are recorded at fair value, which is the present value of the expected cash outflows of the obligations. Liabilities in respect of put option agreements are initially recorded at the present value of the redemption amount in accordance with IAS 32 and subsequently measured at fair value in accordance with IAS 39. Both types of obligations are dependent on the future financial performance of the entity and it is assumed that future profits are in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition. At 31 December 2017, the weighted average growth rate in estimating future financial performance was 25.0% (2016: 25.0%), which reflects the prevalence of recent acquisitions in the faster-growing markets and new media sectors. The risk adjusted discount rate applied to these obligations at 31 December 2017 was 1.8% (2016: 1.5%).

A one percentage point increase or decrease in the growth rate in estimated future financial performance would increase or decrease the combined liabilities due to earnout agreements and put options by approximately £8.9 million (2016: £13.4 million) and £9.3 million (2016: £17.9 million), respectively. A 0.5 percentage point increase or decrease in the risk adjusted discount rate would decrease or increase the combined liabilities by approximately £11.2 million (2016: £16.0 million) and £11.4 million (2016: £16.4 million), respectively. An increase in the liability would result in a loss in the revaluation of financial instruments, while a decrease would result in a gain.

Other investments

The fair value of other investments included in level 1 are based on quoted market prices. Other investments included in level 3 are unlisted securities, where market value is not readily available. The Group has estimated relevant fair values on the basis of publicly available information from outside sources. The sensitivity to changes in unobservable inputs is specific to each individual investment.

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Authorised and issued share capital

12 Months Ended

Dec. 31, 2017

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Authorised and issued share capital

26. Authorised and issued share capital

	Equity ordinary shares		Nominal value £m
Authorised
At 1 January 2015		1,750,000,000		175.0
At 31 December 2015		1,750,000,000		175.0
At 31 December 2016		1,750,000,000		175.0
At 31 December 2017		1,750,000,000		175.0
Issued and fully paid
At 1 January 2015		1,325,747,724		132.6
Exercise of share options		3,618,300		0.3
At 31 December 2015		1,329,366,024		132.9
Exercise of share options		2,514,706		0.3
At 31 December 2016		1,331,880,730		133.2
Exercise of share options		630,822		0.1
At 31 December 2017		1,332,511,552		133.3

Company’s own shares

The Company’s holdings of own shares are stated at cost and represent shares held in treasury and purchases by the Employee Share Ownership Plan (‘ESOP’) trusts of shares in WPP plc for the purpose of funding certain of the Group’s share-based incentive plans.

The trustees of the ESOP purchase the Company’s ordinary shares in the open market using funds provided by the Company. The Company also has an obligation to make regular contributions to the ESOP to enable it to meet its administrative costs. The number and market value of the ordinary shares of the Company held by the ESOP at 31 December 2017 was 14,232,910 (2016: 13,857,706), and £190.9 million (2016: £251.7 million) respectively. The number and market value of ordinary shares held in treasury at 31 December 2017 was 62,578,938 (2016: 51,026,358) and £839.2 million (2016: £926.6 million) respectively.

Share options

WPP Executive Share Option Scheme

As at 31 December 2017, unexercised options over ordinary shares of 6,741 have been granted under the WPP Executive Share Option Scheme as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
3,696		8.333		2015 - 2022
3,045		10.595		2016 - 2023

WPP Worldwide Share Ownership Program

As at 31 December 2017, unexercised options over ordinary shares of 3,603,430 and unexercised options over ADRs of 554,464 have been granted under the WPP Worldwide Share Ownership Program as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
2,125		4.819		2011 - 2018
35,550		5.483		2012 - 2019
20,500		5.483		2013 - 2019
1,125		5.608		2012 - 2019
500		5.917		2011 - 2018
15,275		6.028		2011 - 2018
6,125		6.268		2014 - 2018
116,525		6.268		2014 - 2021
48,250		6.268		2015 - 2021
74,500		7.113		2013 - 2020
32,500		7.113		2014 - 2020
3,000		7.543		2014 - 2020
272,579		8.458		2015 - 2022
67,625		13.145		2017 - 2021
2,178,454		13.145		2017 - 2024
5,125		13.145		2018 - 2024
703,172		13.505		2016 - 2023
20,500		13.505		2017 - 2023

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
14,850		44.560		2012 - 2019
34,705		49.230		2014 - 2021
22,840		56.560		2013 - 2020
6,550		59.500		2011 - 2018
53,719		67.490		2015 - 2022
229,842		102.670		2017 - 2024
191,958		110.760		2016 - 2023

WPP Share Option Plan 2015

As at 31 December 2017, unexercised options over ordinary shares of 9,394,600 and unexercised options over ADRs of 1,041,670 have been granted under the WPP Share Option Plan 2015 as follows:

Number of ordinary shares under option	Exercise price per share (£ )		Exercise dates
20,500		13.085		2020 - 2024
3,767,125		13.085		2020 - 2027
93,250		15.150		2018 - 2022
2,489,900		15.150		2018 - 2025
6,500		15.150		2019 - 2025
17,250		17.055		2019 - 2023
3,000,075		17.055		2019 - 2026

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
430,760		88.260		2020 - 2027
343,560		105.490		2020 - 2026
267,350		115.940		2018 - 2025

The aggregate status of the WPP Share Option Plans during 2017 was as follows:

Movements on options granted (represented in ordinary shares)

	1 January 2017		Granted		Exercised			Lapsed			Outstanding 31 December 2017		Exercisable 31 December 2017
WPP		8,851		–		(2,110	)		–			6,741		6,741
WWOP		7,809,917		–		(620,387	)		(813,780	)		6,375,750		6,370,625
WSOP		10,273,450		5,960,775		(8,325	)		(1,622,950	)		14,602,950		–
		18,092,218		5,960,775		(630,822	)		(2,436,730	)		20,985,441		6,377,366

Weighted-average exercise price for options over

	1 January 2017		Granted		Exercised		Lapsed		Outstanding 31 December 2017		Exercisable 31 December 2017
Ordinary shares (£)
WPP		9.355		–		–		–		9.355		9.355
WWOP		12.059		–		10.428		12.592		12.195		12.194
WSOP		16.192		13.085		–		16.244		14.929		–
ADRs ($)
WPP		59.170		–		59.170		–		–		–
WWOP		93.131		–		57.808		98.281		94.752		94.752
WSOP		109.998		88.260		–		109.612		101.047		–

Options over ordinary shares

Outstanding

Range of exercise prices £	Weighted average exercise price £	Weighted average contractual life Months
4.819 – 17.055	14.169	99

Options over ADRs

Outstanding

Range of exercise prices $	Weighted average exercise price $	Weighted average contractual life Months
44.560 – 115.940	98.860	96

As at 31 December 2017 there was £9.0 million (2016: £9.9 million) of total unrecognised compensation cost related to share options. That cost is expected to be recognised over a weighted average period of 20 months (2016: 20 months).

Share options are satisfied out of newly issued shares.

The weighted average fair value of options granted in the year calculated using the Black-Scholes model was as follows:

	2017		2016		2015
Fair value of UK options (shares)		112.0p		135.0p		144.0p
Fair value of US options (ADRs)		$9.40		$9.94		$11.34
Weighted average assumptions:
UK Risk-free interest rate		0.57%		0.44%		1.04%
US Risk-free interest rate		2.05%		1.60%		1.45%
Expected life (months)		48		48		48
Expected volatility		17%		16%		17%
Dividend yield		2.9%		2.8%		2.8%

Options are issued at an exercise price equal to market value on the date of grant.

The average share price of the Group for the year ended 31 December 2017 was £15.86 (2016: £16.45, 2015: £14.74) and the average ADR price for the same period was $101.86 (2016: $111.20, 2015: $112.88).

Expected volatility is sourced from external market data and represents the historic volatility in the Group’s share price over a period equivalent to the expected option life.

Expected life is based on a review of historic exercise behaviour in the context of the contractual terms of the options, as described in more detail below.

Terms of share option plans

In 2015, the Group introduced the Share Option Plan 2015 to replace both the ‘all-employee’ Worldwide Share Ownership Plan and the discretionary Executive Stock Option Plan. Two kinds of options over ordinary shares can be granted, both with a market value exercise price. Firstly, options can be granted to employees who have worked at a company owned by WPP plc for at least two years which are not subject to performance conditions. Secondly, options may be granted on a discretionary basis subject to the satisfaction of performance conditions.

The Worldwide Share Ownership Program was open for participation to employees with at least two years’ employment in the Group. It was not available to those participating in other share-based incentive programs or to Executive Directors. The vesting period for each grant is three years and there are no performance conditions other than continued employment with the Group.

The Executive Stock Option Plan has historically been open for participation to WPP Group Leaders, Partners and High Potential Group. It is not currently offered to parent company Executive Directors. The vesting period is three years and performance conditions include achievement of various TSR (Total Shareholder Return) and EPS (Earnings Per Share) objectives, as well as continued employment. The terms of these stock options are such that if, after nine years and eight months, the performance conditions have not been met, then the stock option will vest automatically.

The Group grants stock options with a life of 10 years, including the vesting period.

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Other reserves

12 Months Ended

Dec. 31, 2017

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Other reserves

27. Other reserves

Other reserves comprise the following:

	Capital redemption reserve £m		Equity reserve £m			Revaluation reserve £m			Translation reserve £m			Total other reserves £m
1 January 2015		2.7		(246.2	)		158.4			121.3			36.2
Exchange adjustments on foreign currency net investments		–		–			–			(272.9	)		(272.9	)
Gain on revaluation of available for sale investments		–		–			206.0			–			206.0
Recognition and remeasurement of financial instruments		–		(59.0	)		–			–			(59.0	)
Share purchases – close period commitments		–		80.0			–			–			80.0
31 December 2015		2.7		(225.2	)		364.4			(151.6	)		(9.7	)
Exchange adjustments on foreign currency net investments		–		–			–			1,309.9			1,309.9
Loss on revaluation of available for sale investments		–		–			(93.1	)		–			(93.1	)
Recognition and remeasurement of financial instruments		–		(21.9	)		–			–			(21.9	)
31 December 2016		2.7		(247.1	)		271.3			1,158.3			1,185.2
Exchange adjustments on foreign currency net investments		–		–			–			(445.5	)		(445.5	)
Gain on revaluation of available for sale investments		–		–			32.1			–			32.1
Recognition and remeasurement of financial instruments		–		(10.1	)		–			–			(10.1	)
31 December 2017		2.7		(257.2	)		303.4			712.8			761.7

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Acquisitions

12 Months Ended

Dec. 31, 2017

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Acquisitions

28. Acquisitions

The Group accounts for acquisitions in accordance with IFRS 3 Business Combinations. IFRS 3 requires the acquiree’s identifiable assets, liabilities and contingent liabilities (other than non-current assets or disposal groups held for sale) to be recognised at fair value at acquisition date. In assessing fair value at acquisition date, management make their best estimate of the likely outcome where the fair value of an asset or liability may be contingent on a future event. In certain instances, the underlying transaction giving rise to an estimate may not be resolved until some years after the acquisition date. IFRS 3 requires the release to profit of any acquisition reserves which subsequently become excess in the same way as any excess costs over those provided at acquisition date are charged to profit. At each period end management assess provisions and other balances established in respect of acquisitions for their continued probability of occurrence and amend the relevant value accordingly through the consolidated income statement or as an adjustment to goodwill as appropriate under IFRS 3.

Acquisitions in 2017

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		0.8			79.0			79.8
Property, plant and equipment		5.5			–			5.5
Cash		28.9			–			28.9
Trade receivables due within one year		74.4			–			74.4
Other current assets		20.1			–			20.1
Total assets		129.7			79.0			208.7
Current liabilities		(76.0	)		–			(76.0	)
Trade and other payables due after one year		(10.2	)		(20.5	)		(30.7	)
Deferred tax liabilities		–			(16.8	)		(16.8	)
Provisions		(0.1	)		(4.8	)		(4.9	)
Total liabilities		(86.3	)		(42.1	)		(128.4	)
Net assets		43.4			36.9			80.3
Non-controlling interests								(13.9	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(5.7	)
Goodwill								314.3
Consideration								375.0
Consideration satisfied by:
Cash								213.7
Payments due to vendors								161.3

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £63.9 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material. There were no material acquisitions completed between 31 December 2017 and the date the financial statements have been authorised for issue.

Acquisitions in 2016

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		10.5			319.1			329.6
Property, plant and equipment		20.6			–			20.6
Cash		57.1			–			57.1
Trade receivables due within one year		249.5			–			249.5
Other current assets		78.0			–			78.0
Total assets		415.7			319.1			734.8
Current liabilities		(299.4	)		(2.8	)		(302.2	)
Trade and other payables due after one year		(40.4	)		(59.5	)		(99.9	)
Deferred tax liabilities		–			(96.1	)		(96.1	)
Provisions		(0.1	)		(11.5	)		(11.6	)
Bank loans		(144.4	)		–			(144.4	)
Total liabilities		(484.3	)		(169.9	)		(654.2	)
Net assets		(68.6	)		149.2			80.6
Non-controlling interests								(15.0	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(98.5	)
Goodwill								799.3
Consideration								766.4
Consideration satisfied by:
Cash								423.3
Payments due to vendors								343.1

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £54.8 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material.

Acquisitions in 2015

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		2.4			230.7			233.1
Property, plant and equipment		21.1			–			21.1
Cash		57.7			–			57.7
Trade receivables due within one year		115.4			–			115.4
Other current assets		75.1			–			75.1
Total assets		271.7			230.7			502.4
Current liabilities		(207.9	)		–			(207.9	)
Trade and other payables due after one year		(16.8	)		(49.5	)		(66.3	)
Deferred tax liabilities		–			(70.3	)		(70.3	)
Provisions		(3.3	)		(7.7	)		(11.0	)
Total liabilities		(228.0	)		(127.5	)		(355.5	)
Net assets		43.7			103.2			146.9
Non-controlling interests								(47.2	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(208.6	)
Goodwill								778.9
Consideration								670.0
Consideration satisfied by:
Cash								411.6
Payments due to vendors								258.4

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £27.8 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material.

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Principal subsidiary undertakings

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Principal subsidiary undertakings

29. Principal subsidiary undertakings

The principal subsidiary undertakings of the Group are:

	Country of incorporation
Grey Global Group LLC	US
J. Walter Thompson Company LLC	US
GroupM Worldwide LLC	US
The Ogilvy Group LLC	US
Young & Rubicam LLC	US
TNS Group Holdings Ltd	UK

All of these subsidiaries are operating companies and are 100% owned by the Group.

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Related party transactions

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Related party transactions

30. Related party transactions

From time to time the Group enters into transactions with its associate undertakings. These transactions were not material for any of the years presented.

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Reconciliation of profit before interest and taxation to headline PBIT

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Reconciliation of profit before interest and taxation to headline PBIT

31. Reconciliation of profit before interest and taxation to headline PBIT:

Reconciliation of profit before interest and taxation to headline PBIT:

	2017 £m			2016 £m			2015 £m
Profit before interest and taxation		2,021.7			2,112.9			1,679.0
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Goodwill impairment		27.1			27.0			15.1
Gains on disposal of investments and subsidiaries	(129.0)			(44.3)			(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Share of exceptional (gains)/losses of associates		(0.8	)		15.2			21.8
Headline PBIT		2,267.1			2,160.3			1,774.0

Headline PBIT is one of the metrics that management uses to assess the performance of the business.

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Condensed consolidating financial information for bonds issued

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Condensed consolidating financial information for bonds issued

32. Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors

WPP Finance 2010 has in issue $500 million of 3.625% bonds due September 2022, $300 million of 5.125% bonds due September 2042 and $812 million of 4.75% bonds due November 2021 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited and WPP Jubilee Limited as subsidiary guarantors.

The issuer and guarantors of the bonds (issuer and subsidiary guarantors are 100% owned by WPP plc) are each subject to the reporting requirements under section 15(d) of the Securities Exchange Act of 1934. In accordance with SEC Regulation S-X Rule 3-10, condensed consolidating financial information containing financial information for WPP Finance 2010 and the guarantors is presented. Condensed consolidating financial information is prepared in accordance with IFRS as issued by the IASB. In the parent company, subsidiary issuer and subsidiary guarantors columns investments in subsidiaries are accounted for under the equity method of accounting. Under the equity method, earnings of subsidiaries are reflected as “share of results of subsidiaries” in the income statement and as “investment in subsidiaries” in the balance sheet, as required by the SEC.

In the event that WPP Finance 2010 fails to pay the holders of the securities, thereby requiring WPP plc, WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited or WPP Jubilee Limited to make payment pursuant to the terms of their full and unconditional, and joint and several guarantee of those securities, there is no impediment to WPP plc, WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited or WPP Jubilee Limited obtaining reimbursement for any such payments from WPP Finance 2010.

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,636.8	)		(27.4	)		6,290.1			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.3			(3.3	)		(63.8	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,794.0	)		(58.6	)		5,082.8			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,921.2			—			—			(42,565.2	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			28,141.0			2,079.9			28,677.4			(55,036.3	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.6			(6,169.5	)		—
Cash and short-term deposits		—			235.0			—			6,683.5			(4,527.1	)		2,391.4
		1,661.7			2,406.1			65.8			21,725.7			(10,696.6	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,240.0	)		—			(121.2	)		6,169.5			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,225.7	)		(47.0	)		(15,485.5	)		10,696.6			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,819.6	)		18.8			6,240.2			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,917.6			(55,036.3	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,909.6			(42,565.2	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			24,162.9			—			—			(37,518.9	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,408.9			2,283.8			26,737.5			(47,660.9	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			151.8			—			5,300.5			(3,029.1	)		2,436.9
		1,653.9			2,219.9			46.0			20,568.2			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(3,141.1	)		—			(215.6	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,986.1	)		(36.4	)		(16,465.7	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,766.2	)		9.6			4,102.5			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,840.0			(47,660.9	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			24,152.4			(37,518.9	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6

33.    Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors

WPP Finance 2010 has in issue $750 million of 3.750% bonds due September 2024 and $500 million of 5.625% bonds due November 2043, with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors.

The issuer and guarantors of the bonds (issuer and subsidiary guarantors are 100% owned by WPP plc) are each subject to the reporting requirements under section 15(d) of the Securities Exchange Act of 1934. In accordance with SEC Regulation S-X Rule 3-10, condensed consolidating financial information containing financial information for WPP Finance 2010 and the guarantors is presented. Condensed consolidating financial information is prepared in accordance with IFRS as issued by the IASB. In the parent company, subsidiary issuer and subsidiary guarantors columns investments in subsidiaries are accounted for under the equity method of accounting. Under the equity method, earnings of subsidiaries are reflected as “share of results of subsidiaries” in the income statement and as “investment in subsidiaries” in the balance sheet, as required by the SEC.

In the event that WPP Finance 2010 fails to pay the holders of the securities, thereby requiring WPP plc, WPP Jubilee Limited or WPP 2005 Limited to make payment pursuant to the terms of their full and unconditional, and joint and several guarantee of those securities, there is no impediment to WPP plc, WPP Jubilee Limited or WPP 2005 Limited obtaining reimbursement for any such payments from WPP Finance 2010.

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹ Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,640.6	)		(27.4	)		6,293.9			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.2			(3.3	)		(63.7	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,797.7	)		(58.6	)		5,086.5			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,752.6			—			—			(42,396.6	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			27,972.4			2,079.9			28,677.4			(54,867.7	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.5			(6,169.4	)		—
Cash and short-term deposits		—			231.2			—			6,687.3			(4,527.1	)		2,391.4
		1,661.7			2,402.3			65.8			21,729.4			(10,696.5	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,067.6	)		—			(293.5	)		6,169.4			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,053.3	)		(47.0	)		(15,657.8	)		10,696.5			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,651.0	)		18.8			6,071.6			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,749.0			(54,867.7	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,741.0			(42,396.6	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			23,994.3			—			—			(37,350.3	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,240.3			2,283.8			26,737.5			(47,492.3	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			148.0			—			5,304.3			(3,029.1	)		2,436.9
		1,653.9			2,216.1			46.0			20,572.0			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(2,968.7	)		—			(388.0	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,813.7	)		(36.4	)		(16,638.1	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,597.6	)		9.6			3,933.9			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,671.4			(47,492.3	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			23,983.8			(37,350.3	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6

XML

Accounting policies (Policies)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Basis of preparation

Basis of preparation

The consolidated financial statements have been prepared under the historical cost convention, except for the revaluation of certain financial instruments. The principal accounting policies are set out below.

The financial statements were approved by the Board of Directors and authorized for issue on 30 April 2018.

Basis of consolidation

Basis of consolidation

The consolidated financial statements include the results of the Company and all its subsidiary undertakings made up to the same accounting date. All intra-Group balances, transactions, income and expenses are eliminated in full on consolidation. The results of subsidiary undertakings acquired or disposed of during the period are included or excluded from the consolidated income statement from the effective date of acquisition or disposal.

Presentation

Presentation

The Group has changed its accounting policy in regard to the presentation of the income statement under IAS 1 Presentation of Financial Statements for the year ended 31 December 2017, moving from a ‘nature of expense’ method of presentation to a ‘function of expense’ method of presentation. The Group considers this to be a more reliable and relevant presentation and prior years have been represented in accordance with IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. This change in accounting policy has not resulted in a change to revenue, operating profit or profit for any of the years presented.

Goodwill and other intangible assets

Goodwill and other intangible assets

Intangible assets comprise goodwill, certain acquired separable corporate brand names, acquired customer relationships, acquired proprietary tools and capitalised computer software not integral to a related item of hardware.

Goodwill represents the excess of fair value attributed to investments in businesses or subsidiary undertakings over the fair value of the underlying net assets, including intangible assets, at the date of their acquisition.

Goodwill impairment reviews are undertaken annually or more frequently if events or changes in circumstances indicate a potential impairment. The carrying value of goodwill is compared to the net present value of future cash flows derived from the underlying assets using a projection period of up to five years for each cash-generating unit. After the projection period a steady growth rate representing an appropriate long-term growth rate for the industry is applied. Any impairment is recognised immediately as an expense and is not subsequently reversed.

Corporate brand names, customer relationships and proprietary tools acquired as part of acquisitions of businesses are capitalised separately from goodwill as intangible assets if their value can be measured reliably on initial recognition and it is probable that the expected future economic benefits that are attributable to the asset will flow to the Group.

Certain corporate brands of the Group are considered to have an indefinite economic life because of the institutional nature of the corporate brand names, their proven ability to maintain market leadership and profitable operations over long periods of time and the Group’s commitment to develop and enhance their value. The carrying value of these intangible assets is reviewed at least annually for impairment and adjusted to the recoverable amount if required.

Amortisation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life as follows:

• Brand names (with finite lives) – 10-20 years.

• Customer-related intangibles – 3-10 years.

• Other proprietary tools – 3-10 years.

• Other (including capitalised computer software) – 3-5 years.

Contingent consideration

Contingent consideration

Contingent consideration is accounted for in accordance with IFRS 3 Business Combinations. Contingent consideration only applies to situations where contingent payments are not dependent on future employment of vendors and any such payments are expensed when they relate to future employment.

Future anticipated payments to vendors in respect of contingent consideration (earnout agreements) are initially recorded at fair value which is the present value of the expected cash outflows of the obligations. The obligations are dependent on the future financial performance of the interests acquired (typically over a four- to five-year period following the year of acquisition)

and assume the operating companies improve profits in line with directors’ estimates. The directors derive their estimates from internal business plans together with financial due diligence performed in connection with the acquisition.

Subsequent adjustments to the fair value are recorded in the consolidated income statement within revaluation of financial instruments.

Property, plant and equipment

Property, plant and equipment

Property, plant and equipment are shown at cost less accumulated depreciation and any provision for impairment with the exception of freehold land which is not depreciated. The Group assesses the carrying value of its property, plant and equipment to determine if any impairment has occurred. Where this indicates that an asset may be impaired, the Group applies the requirements of IAS 36 Impairment of Assets in assessing the carrying amount of the asset. This process includes comparing its recoverable amount with its carrying value. Depreciation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life, as follows:

• Freehold buildings – 50 years.

• Leasehold land and buildings – over the term of the lease or life of the asset, if shorter.

• Fixtures, fittings and equipment – 3-10 years.

• Computer equipment – 3-5 years.

Interests in associates and joint ventures

Interests in associates and joint ventures

An associate is an entity over which the Group has significant influence. In certain circumstances, significant influence may be represented by factors other than ownership and voting rights, such as representation on the Board of Directors.

The Group’s share of the profits less losses of associate undertakings net of tax, interest and non-controlling interests is included in the consolidated income statement and the Group’s share of net assets is shown within interests in associates in the consolidated balance sheet. The Group’s share of the profits less losses and net assets is based on current information produced by the undertakings, adjusted to conform with the accounting policies of the Group.

The Group assesses the carrying value of its associate undertakings to determine if any impairment has occurred. Where this indicates that an investment may be impaired, the Group applies the requirements of IAS 36 in assessing the carrying amount of the investment. This process includes comparing its recoverable amount with its carrying value.

The Group accounts for joint venture investments under the equity method which is consistent with the Group’s treatment of associates.

Other investments

Other investments

Other investments are designated as ‘available for sale’ and are shown at fair value with any movements in fair value taken to equity.

On disposal the cumulative gain or loss previously recognised in equity is included in the profit or loss for the year.

Inventory and work in progress

Inventory and work in progress

Work in progress is valued at cost, which includes outlays incurred on behalf of clients and an appropriate proportion of directly attributable costs and overheads on incomplete assignments. Provision is made for irrecoverable costs where appropriate. Inventory is stated at the lower of cost and net realisable value.

Trade receivables

Trade receivables

Trade receivables are stated net of provisions for bad and doubtful debts.

Foreign currency and interest rate hedging

Foreign currency and interest rate hedging

The Group’s policy on interest rate and foreign exchange rate management sets out the instruments and methods available to hedge interest and currency risk exposures and the control procedures in place to ensure effectiveness.

The Group uses derivative financial instruments to reduce exposure to foreign exchange risk and interest rate movements. The Group does not hold or issue derivative financial instruments for speculative purposes.

Derivatives are initially recognised at fair value at the date a derivative contract is entered into and are subsequently remeasured to their fair value at each balance sheet date. The resulting gain or loss is recognised in profit or loss immediately unless the derivative is designated and effective as a hedging instrument, in which event the timing of the recognition in profit or loss depends on the nature of the hedge relationship.

At the inception of the hedge relationship the entity documents the relationship between the hedging instrument and hedged item, along with its risk

management objectives and its strategy for undertaking various hedge transactions. Furthermore, at the inception of the hedge and on an ongoing basis, the Group documents whether the hedging instrument that is used in a hedging relationship is highly effective in offsetting changes in fair values or cash flows of the hedged item.

Note 25 contains details of the fair values of the derivative instruments used for hedging purposes.

Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recorded in profit or loss immediately, together with any changes in the fair value of the hedged item that is attributable to the hedged risk.

The effective portion of changes in the fair value of derivatives that are designated and qualify as cash flow or net investment hedges is deferred in equity. The gain or loss relating to the ineffective portion is recognised immediately in profit or loss. Amounts deferred in equity are recycled in profit or loss in the periods when the hedged item is recognised in profit or loss. However, when the forecast transaction that is hedged results in the recognition of a non-financial asset or a non-financial liability, the gains and losses previously deferred in equity are transferred from equity and included in the initial measurement of the cost of the asset or liability.

Hedge accounting is discontinued when the hedging instrument expires or is sold, terminated, or exercised, or no longer qualifies for hedge accounting. At that time, any cumulative gain or loss on the hedging instrument recognised in equity is retained in equity until the forecast transaction occurs. If a hedged transaction is no longer expected to occur, the net cumulative gain or loss recognised in equity is transferred to net profit or loss for the period.

Derivatives embedded in other financial instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of host contracts and the host contracts are not carried at fair value with unrealised gains or losses reported in the consolidated income statement.

Liabilities in respect of option agreements

Liabilities in respect of option agreements

Option agreements that allow the Group’s equity partners to require the Group to purchase a non-controlling interest are treated as derivatives over equity instruments and are recorded in the consolidated balance sheet initially at the present value of the redemption amount in accordance with IAS 32 Financial Instruments: Presentation and subsequently measured at fair value in accordance with IAS 39 Financial Instruments: Recognition and Measurement. The movement in the fair value is recognised as income or expense within revaluation of financial instruments in the consolidated income statement.

Derecognition of financial liabilities

Derecognition of financial liabilities

In accordance with IAS 39 Financial Instruments: Recognition and Measurement, a financial liability of the Group is only released to the consolidated income statement when the underlying legal obligation is extinguished.

Debt

Debt

Interest-bearing debt is recorded at the proceeds received, net of direct issue costs.

Borrowing costs

Borrowing costs

Finance costs of borrowing are recognised in the consolidated income statement over the term of those borrowings.

Revenue recognition

Revenue recognition

Revenue comprises commission and fees earned in respect of amounts billed. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. Revenue is stated exclusive of VAT, sales taxes and trade discounts.

Advertising and Media Investment Management

Advertising and Media Investment Management

Revenue is typically derived from commissions on media placements and fees for advertising services. Revenue may consist of various arrangements involving commissions, fees, incentive-based revenue or a combination of the three, as agreed upon with each client.

Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. The amount of revenue recognised depends on whether we act as an agent or as a principal in an arrangement with a client. Where we act as an agent, the revenue recorded is the net amount retained when the fee or commission is earned. Although the Group may bear credit risk in respect of these activities, the arrangements with our clients are such that we consider that we are acting as an agent on their behalf. In such cases, costs incurred with external suppliers (such as media suppliers) are excluded from our revenue. Where the Group acts as a principal, the revenue recorded is the gross amount billed.

Incentive-based revenue typically comprises both quantitative and qualitative elements; on the element related to quantitative targets, revenue is recognised when the quantitative targets have been achieved; on the element related to qualitative targets, revenue is recognised when the incentive is received or receivable.

The Group receives volume rebates from certain suppliers for transactions entered into on behalf of clients that, based on the terms of the relevant contracts and local law, are either remitted to clients or retained by the Group. If amounts are passed on to clients they are recorded as liabilities until settled or, if retained by the Group, are recorded as revenue when earned.

Data Investment Management

Data Investment Management

Revenue recognised in proportion to the level of service performed for market research contracts is based on proportional performance. In assessing contract performance, both input and output criteria are reviewed. Costs incurred are used as an objective input measure of performance. The primary input of all work performed under these arrangements is labour. As a result of the relationship between labour and cost, there is normally a direct relationship between costs incurred and the proportion of the contract performed to date. Costs incurred as a proportion of expected total costs is used as an initial proportional performance measure. This indicative proportional performance measure is subsequently validated against other more subjective criteria (i.e. relevant output measures) such as the percentage of interviews completed, percentage of reports delivered to a client and the achievement of any project milestones stipulated in the contract. In the event of divergence between the objective and more subjective measures, the more subjective measures take precedence since these are output measures.

While most of the studies provided in connection with the Group’s market research contracts are undertaken in response to an individual client’s or group of clients’ specifications, in certain instances a study may be developed as an off-the-shelf product offering sold to a broad client base. For these transactions, revenue is recognised when the product is delivered. Where the terms of transaction provide for licensing the product on a subscription basis, revenue is recognised over the subscription period on a straight-line basis or, if applicable, based on usage.

Substantially all services are provided on a fixed price basis. Pricing may also include a provision for a surcharge where the actual labour hours incurred in completing a project are significantly above the labour hours quoted in the project proposal. In instances where this occurs, the surcharge will be included in the total revenue base on which to measure proportional performance when the actual threshold is reached provided that collectability is reasonably assured.

Public Relations & Public Affairs and Brand Consulting, Health & Wellness, and Specialist Communications

Public Relations & Public Affairs and Brand Consulting, Health & Wellness, and Specialist Communications

Revenue is typically derived from retainer fees and services to be performed subject to specific agreement. Revenue is recognised when the service is performed, in accordance with the terms of the contractual arrangement. Revenue is recognised on long-term contracts, if the final outcome can be assessed with reasonable certainty, by including in the consolidated income statement revenue and related costs as contract activity progresses.

Taxation

Taxation

Corporate taxes are payable on taxable profits at current rates. The tax expense represents the sum of the tax currently payable and deferred tax.

The Group is subject to corporate taxes in a number of different jurisdictions and judgement is required in determining the appropriate provision for transactions where the ultimate tax determination is uncertain. In such circumstances, the Group recognises liabilities for anticipated taxes based on the best information available and where the anticipated liability is both probable and estimable, liabilities are classified as current. Any interest and penalties accrued are included in corporate income taxes both in the consolidated income statement and balance sheet. Where the final outcome of such matters differs from the amount recorded, any differences may impact the income tax and deferred tax provisions in the period in which the final determination is made.

The tax laws that apply to the Group’s subsidiaries may be amended by the relevant tax authorities. Such potential amendments are regularly monitored and adjustments are made to the Group’s tax liabilities and deferred tax assets and liabilities where necessary.

The tax currently payable is based on taxable profit for the year. Taxable profit differs from net profit as reported in the consolidated income statement because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The Group’s liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the balance sheet date.

Deferred tax is the tax expected to be payable or recoverable on differences between the carrying amounts of assets and liabilities in the financial statements and the corresponding tax bases used in the computation of taxable profit, and is accounted for using the balance sheet liability method. Deferred tax liabilities are recognised for all taxable temporary differences unless specifically excepted by IAS 12 Income Taxes. Deferred tax is charged or credited in the consolidated income statement, except when it relates to items charged or credited to other comprehensive income or directly to equity, in which case the deferred tax is also dealt with in other comprehensive income or equity. Deferred tax assets are recognised to the extent that it is probable that taxable profits will be available against which deductible temporary differences can be utilised, which can require the use of accounting estimation and the exercise of judgement. Such assets and liabilities are not recognised if the temporary difference arises from the initial recognition of goodwill or other assets and liabilities (other than in a business combination) in a transaction that affects neither the taxable profit nor the accounting profit.

The carrying amount of deferred tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered.

Deferred tax liabilities are recognised for taxable temporary differences arising on investments in subsidiaries and associates, and interests in joint ventures, except where the Group is able to control the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to set off current tax assets against current tax liabilities and when they relate to income taxes levied by the same taxation authority and the Group intends to settle its current tax assets and liabilities on a net basis.

Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised based on enacted or substantively enacted legislation.

Retirement benefit costs

Retirement benefit costs

The Group accounts for retirement benefit costs in accordance with IAS 19 Employee Benefits.

For defined contribution plans, contributions are charged to the consolidated income statement as payable in respect of the accounting period.

For defined benefit plans the amounts charged to operating profit are the current service costs, past service costs, administrative expenses and gains and losses on settlements and curtailments. They are included as part of staff costs. Past service costs are recognised immediately in the consolidated income statement when the related plan amendment occurs. Net interest expense is calculated by applying the discount rate to the recognised overall surplus or deficit in the plan.

Actuarial gains and losses are recognised immediately in the consolidated statement of comprehensive income.

Where defined benefit plans are funded, the assets of the plan are held separately from those of the Group, in separate independently managed funds. Pension plan assets are measured at fair value and liabilities are measured on an actuarial basis using the projected unit method and discounted at a rate equivalent to the current rate of return on a high-quality corporate bond of equivalent currency and term to the plan liabilities. The actuarial valuations are obtained at least triennially and are updated at each balance sheet date.

Recognition of a surplus in a defined benefit plan is limited based on the economic gain the Company is expected to benefit from in the future by means of a refund or reduction in future contributions to the plan, in accordance with IAS 19.

Finance leases

Finance leases

Assets held under finance leases are recognised as assets of the Group at the inception of the lease at the lower of their fair value and the present value of the minimum lease payments. Depreciation on leased assets is charged to the consolidated income statement on the same basis as owned assets. Leasing payments are treated as consisting of capital and interest elements and the interest is charged to the consolidated income statement as it is incurred.

Operating leases

Operating leases

Operating lease rentals are charged to the consolidated income statement on a straight-line basis over the lease term. Any premium or discount on the acquisition of a lease is spread over the life of the lease on a straight-line basis.

Translation of foreign currencies

Translation of foreign currencies

Foreign currency transactions arising from normal trading activities are recorded at the rates in effect at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies at the year end are translated at the year-end exchange rate. Foreign currency gains and losses are credited or charged to the consolidated income statement as they arise.

The income statements of overseas subsidiary undertakings are translated into pounds sterling at average exchange rates and the year-end net assets of these companies are translated at year-end exchange rates.

Exchange differences arising from retranslation of the opening net assets and on foreign currency borrowings (to the extent that they hedge the Group’s investment in such operations) are reported in the consolidated statement of comprehensive income.

Goodwill and fair value adjustments arising on the acquisition of a foreign entity are treated as assets and liabilities of the foreign entity and translated at the closing rate.

Share-based payments

Share-based payments

The Group issues equity-settled share-based payments (including share options) to certain employees and accounts for these awards in accordance with IFRS 2 Share-Based Payment. Equity-settled share-based payments are measured at fair value (excluding the effect of non-market-based vesting conditions) at the date of grant. Details regarding the fair value of equity settled share-based transactions are set out in notes 22 and 26.

The fair value determined at the grant date is recognised in the consolidated income statement as an expense on a straight-line basis over the relevant vesting period, based on the Group’s estimate of the number of shares that will ultimately vest and adjusted for the effect of non-market-based vesting conditions.

New IFRS accounting pronouncements

New IFRS accounting pronouncements

At the date of authorisation of these financial statements, the following Standards, which have not been applied in these financial statements, were in issue but not yet effective:

• IFRS 9: Financial Instruments;

• IFRS 15: Revenue from Contracts with Customers; and

• IFRS 16: Leases.

IFRS 9 is effective from 1 January 2018. It contains requirements for the classification and measurement of financial assets and liabilities, impairment (introducing an expected loss method) and hedge accounting. The Group does not consider that it will have a significant impact on the financial statements of the Group, particularly given the short-term nature of the Group’s trade receivables, which are mainly due from large national or multinational companies. The principal impact will be for equity investments currently designated as ‘available for sale’, where the Group will elect to recognise the fair value movements of certain equity investments through other comprehensive income. Fair value movements of certain other equity investments will be recognised in profit or loss.

IFRS 15 is effective from 1 January 2018 and it will be applied retrospectively to each prior period presented, we do not expect the adoption of IFRS 15 to have a significant impact on the timing of the Group’s revenue recognition nor on the Group’s equity.

However, for certain of our contracts, the adoption of IFRS 15 will result in a change in our accounting for certain third-party costs. Third-party costs are included in revenue where the Group acts as principal with respect to the services provided to the client and is excluded where the Group acts as agent. Under IFRS 15, the principal versus agent assessment is based on whether we control the relevant services before they are transferred to the client. As a result of the adoption of IFRS 15, there will be an increase in third-party costs included in revenue and costs of services. In 2017, these third-party costs were approximately £500 million. This change will increase revenue and costs of services by the same amount and therefore have no impact on operating profit.

IFRS 16 is effective from 1 January 2019. The standard eliminates the classification of leases as either operating or finance leases and introduces a single accounting model. Lessees will be required to recognise a right-of-use asset and related lease liability for the majority of their operating leases and show depreciation of leased assets and interest on lease liabilities separately in the income statement. IFRS 16 will require the Group to recognise substantially all of its current operating lease commitments on the balance sheet and the financial impact of this, together with other implications of the standard, are currently being assessed.

Critical judgements and estimation uncertainty in applying accounting policies

Critical judgements and estimation uncertainty in applying accounting policies

Management is required to make key decisions and judgements whilst acknowledging there is estimation uncertainty in the process of applying the Group’s accounting policies. These estimates and judgements are reviewed on an ongoing basis. Where judgement has been applied or estimation uncertainty exists, the key factors taken into consideration are disclosed in the accounting policies and the appropriate note in these financial statements.

The most significant areas of estimation uncertainty include:

• Goodwill (note 12): The discounted cash flow methodology employed by the Group when testing for goodwill impairment requires estimates regarding revenue growth, operating margins discount rates and working capital requirements.

• Payments due to vendors (earnout agreements) and liabilities in respect of put options: Estimates are required regarding growth rates in deriving future financial performance and discount rates to be applied when measuring the liabilities for earnouts and put options. Further details are disclosed in note 25.

• Provision for post-employment benefits (note 23): Estimates are required in the accounting for defined benefit pension plans, including establishing discount rates, rates of increase in salaries and pensions in payment, inflation and mortality assumptions. These estimates are made by management based on the advice of qualified advisors.

The most significant areas of judgements include:

• Revenue recognition: Judgement is required regarding the timing of recognition, particularly in relation to media volume income with regards to whether it is required to be passed back to the client. Further details are set out in the accounting policy.

• Taxation (note 7): Judgement is required in relation to the level of provisions required and the amount of taxes that will be due, particularly given the many countries in which the Group operates.

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Accounting policies (Tables)

12 Months Ended

Dec. 31, 2017

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Summary of Estimated Useful Life of Intangible Assets

Amortisation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life as follows:

• Brand names (with finite lives) – 10-20 years.

• Customer-related intangibles – 3-10 years.

• Other proprietary tools – 3-10 years.

• Other (including capitalised computer software) – 3-5 years.

Summary of Estimated Useful Life of Property, Plant and Equipment

Depreciation is provided at rates calculated to write off the cost less estimated residual value of each asset on a straight-line basis over its estimated useful life, as follows:

• Freehold buildings – 50 years.

• Leasehold land and buildings – over the term of the lease or life of the asset, if shorter.

• Fixtures, fittings and equipment – 3-10 years.

• Computer equipment – 3-5 years.

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Segment information (Tables)

12 Months Ended

Dec. 31, 2017

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Contributions by Reportable Segments

Operating sectors

Reported contributions were as follows:

Income statement	Revenue1		Revenue less pass-through costs2		Headline PBIT3		Revenue less pass-through costs margin4
	£m		£m		£m		%
2017
Advertising and Media Investment Management		7,180.3		5,851.9		1,109.0		19.0
Data Investment Management		2,690.9		2,052.3		350.3		17.1
Public Relations & Public Affairs		1,171.9		1,140.9		183.2		16.1
Brand Consulting, Health & Wellness and Specialist Communications		4,222.3		4,094.5		624.6		15.3
		15,265.4				2,267.1
2016
Advertising and Media Investment Management		6,547.3		5,413.5		1,027.2		19.0
Data Investment Management		2,661.1		1,994.0		351.5		17.6
Public Relations & Public Affairs		1,101.3		1,078.8		179.8		16.7
Brand Consulting, Health & Wellness and Specialist Communications		4,079.2		3,911.5		601.8		15.4
		14,388.9				2,160.3
2015
Advertising and Media Investment Management		5,552.8		4,652.0		859.7		18.5
Data Investment Management		2,425.9		1,768.1		286.1		16.2
Public Relations & Public Affairs		945.8		929.7		145.2		15.6
Brand Consulting, Health & Wellness and Specialist Communications		3,310.7		3,174.5		483.0		15.2
		12,235.2				1,774.0

Notes

¹  Intersegment sales have not been separately disclosed as they are not material.

²  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

³  A reconciliation from profit before interest and taxation (PBIT) to headline PBIT is provided in note 31. PBIT is reconciled to profit before taxation in the consolidated income statement.

⁴  Revenue less pass-through costs margin is calculated as headline PBIT (defined above) as a percentage of revenue less pass-through costs.

Other information	Share-based payments		Capital additions1		Depreciation and amortisation2		Goodwill impairment		Share of results of associates		Interests in associates and joint ventures
	£m		£m		£m		£m		£m		£m
2017
Advertising and Media Investment Management		57.0		171.3		108.8		19.5		27.0		193.1
Data Investment Management		14.4		58.8		59.9		–		15.3		106.3
Public Relations & Public Affairs		8.6		10.6		12.2		7.6		6.3		34.2
Brand Consulting, Health & Wellness and Specialist Communications		25.0		85.5		86.1		–		64.9		731.6
		105.0		326.2		267.0		27.1		113.5		1,065.2
2016
Advertising and Media Investment Management		60.7		126.2		105.4		20.9		8.3		285.6
Data Investment Management		13.0		61.5		60.9		–		13.2		109.4
Public Relations & Public Affairs		7.5		10.3		11.6		–		3.2		108.1
Brand Consulting, Health & Wellness and Specialist Communications		25.3		87.1		81.5		6.1		25.1		566.3
		106.5		285.1		259.4		27.0		49.8		1,069.4
2015
Advertising and Media Investment Management		55.4		119.7		96.9		15.1		26.8		377.0
Data Investment Management		13.7		58.1		51.8		–		0.8		86.4
Public Relations & Public Affairs		6.7		9.1		9.8		–		2.3		92.0
Brand Consulting, Health & Wellness and Specialist Communications		23.2		59.5		69.9		–		17.1		203.2
		99.0		246.4		228.4		15.1		47.0		758.6

Notes

¹  Capital additions include purchases of property, plant and equipment and other intangible assets (including capitalised computer software).

²  Depreciation of property, plant and equipment and amortisation of other intangible assets.

Contributions by Geographical Area

Contributions by geographical area were as follows:

	2017 £m		2016 £m		2015 £m
Revenue1
North America2		5,547.0		5,280.8		4,491.2
UK		1,985.9		1,866.3		1,777.4
Western Continental Europe		3,160.0		2,943.2		2,425.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,572.5		4,298.6		3,541.0
		15,265.4		14,388.9		12,235.2
Revenue less pass-through costs3
North America2		4,799.0		4,603.7		3,882.3
UK		1,683.5		1,587.6		1,504.5
Western Continental Europe		2,616.0		2,425.5		2,016.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,041.1		3,781.0		3,121.3
Headline PBIT4
North America2		937.4		895.4		728.2
UK		280.0		261.4		243.1
Western Continental Europe		376.0		351.7		277.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		673.7		651.8		525.5
		2,267.1		2,160.3		1,774.0
	Margin		Margin		Margin
Revenue less pass-through costs margin5
North America2		19.5%		19.4%		18.8%
UK		16.6%		16.5%		16.2%
Western Continental Europe		14.4%		14.5%		13.7%
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		16.7%		17.2%		16.8%
		£m		£m
Non-current assets6
North America2		7,667.5		8,189.3
UK		2,098.2		2,138.5
Western Continental Europe		4,542.1		4,321.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		4,035.8		4,327.2
		18,343.6		18,976.6

Notes

¹ Intersegment sales have not been separately disclosed as they are not material.

²  North America includes the US with revenue of £5,241.3 million (2016: £5,005.8 million, 2015: £4,257.4 million), revenue less pass-through costs of £4,541.0 million (2016: £4,365.1 million, 2015: £3,674.3 million), headline PBIT of £890.3 million (2016: £849.4 million, 2015: £697.3 million) and non-current assets of £7,202.7 million (2016: £7,690.2 million).

³  Revenue less pass-through costs was previously referred to as net sales. Revenue less pass-through costs is revenue less media, data collection and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media and data collection costs. See note 3 to the consolidated financial statements for more details of the pass-through costs.

⁴  See note 31 for a reconciliation of PBIT to headline PBIT.

⁵  Revenue less pass-through costs margin is calculated as headline PBIT as a percentage of revenue less pass-through costs.

⁶  Non-current assets excluding financial instruments and deferred tax.

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Costs of services and general and administrative costs (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Costs of Services and General Administrative Costs

	2017 £m			2016 £m			2015 £m
Costs of services		12,090.2			11,348.1			9,709.1
General and administrative costs		1,267.0			977.7			894.1
		13,357.2			12,325.8			10,603.2
Costs of services and general and administrative costs include:
	2017 £m			2016 £m			2015 £m
Staff costs (note 5)		8,319.0			7,784.9			6,652.6
Establishment costs		888.6			836.5			726.3
Media pass-through costs		1,350.0			1,223.2			999.7
Data collection pass-through costs		633.7			661.0			647.2
Other costs of services and general and administrative costs1		2,165.9			1,820.2			1,577.4
		13,357.2			12,325.8			10,603.2
Other costs of services and general and administrative costs include:
Goodwill impairment (note 12)		27.1			27.0			15.1
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Amortisation and impairment of acquired intangible assets (note 12)		195.1			168.4			140.1
Amortisation of other intangible assets (note 12)		36.3			38.6			33.7
Depreciation of property, plant and equipment		230.7			215.2			190.0
Losses on sale of property, plant and equipment		1.1			0.8			1.1
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Net foreign exchange losses/(gains)		12.9			(17.0	)		(10.7	)
Operating lease rentals:
Land and buildings		586.6			556.1			476.6
Sublease income		(17.9	)		(11.6	)		(11.3	)
		568.7			544.5			465.3
Plant and machinery		11.9			10.6			18.3
		580.6			555.1			483.6

Notes

¹  Other costs of services and general and administrative costs include £142.1 million (2016: £106.9 million, 2015: £64.0 million) of other pass-through costs

Auditors' Remuneration

Auditors’ remuneration:

	2017 £m		2016 £m		2015 £m
Fees payable to the Company’s auditors for the audit of the Company’s annual accounts		1.4		1.4		1.5
The audit of the Company’s subsidiaries pursuant to legislation		20.7		19.4		16.2
		22.1		20.8		17.7
Other services pursuant to legislation		4.0		3.7		3.3
Fees payable to the auditors pursuant to legislation		26.1		24.5		21.0
Tax advisory services		0.1		1.6		1.8
Tax compliance services		0.1		1.3		1.0
		0.2		2.9		2.8
Corporate finance services		–		0.1		0.2
Other services1		4.6		5.7		6.5
Total non-audit fees		4.8		8.7		9.5
Total fees		30.9		33.2		30.5

Note

¹  Other services include audits for earnout purposes.

Minimum Committed Annual Rentals

Minimum committed annual rentals

Amounts payable in 2018 under leases will be as follows:

	Plant and machinery						Land and buildings
	2018 £m		2017 £m		2016 £m		2018 £m		2017 £m		2016 £m
In respect of operating leases which expire:
– within one year		5.1		4.0		4.3		88.6		85.1		57.6
– within two to five years		10.8		10.5		9.7		236.2		287.9		240.3
– after five years		0.1		–		0.3		207.8		187.0		163.1
		16.0		14.5		14.3		532.6		560.0		461.0

Future minimum annual amounts payable under all lease commitments in existence at 31 December 2017 are as follows:

	Minimum rental payments £m		Less sub- let rentals £m			Net payment £m
Year ending 31 December
2018		548.6		(18.6	)		530.0
2019		469.0		(6.5	)		462.5
2020		412.9		(4.2	)		408.7
2021		349.1		(2.4	)		346.7
2022		298.3		(2.1	)		296.2
Later years		1,816.0		(2.6	)		1,813.4
		3,893.9		(36.4	)		3,857.5

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Share of results of associates (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Share of Results of Associates

Share of results of associates include:

	2017 £m			2016 £m			2015 £m
Share of profit before interest and taxation		145.1			97.1			95.2
Share of exceptional gains/(losses)		0.8			(15.2	)		(21.8	)
Share of interest and non-controlling interests		(7.8	)		(4.7	)		(1.7	)
Share of taxation		(24.6	)		(27.4	)		(24.7	)
		113.5			49.8			47.0

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Our people (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Geographical Distribution of Staff

Our staff numbers averaged 134,428 for the year ended 31 December 2017 against 132,657 in 2016 and 124,930 in 2015. Their geographical distribution was as follows:

	2017		2016		2015
North America		27,399		27,246		26,224
UK		14,197		14,070		13,401
Western Continental Europe		25,700		24,996		23,506
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		67,132		66,345		61,799
		134,428		132,657		124,930

Operating Sector Distribution of Staff

Their operating sector distribution was as follows:

	2017		2016		2015
Advertising and Media Investment Management		56,789		55,120		53,227
Data Investment Management		28,629		29,279		28,395
Public Relations & Public Affairs		9,082		9,054		8,492
Brand Consulting, Health & Wellness and Specialist Communications		39,928		39,204		34,816
		134,428		132,657		124,930

Staffing Costs

At the end of 2017, staff numbers were 134,413 (2016: 134,341, 2015: 128,123). Including all employees of associated undertakings, this figure was approximately 203,000 at 31 December 2017 (2016: 198,000, 2015: 190,000).

Staff costs include:

	2017 £m		2016 £m		2015 £m
Wages and salaries		5,832.3		5,395.6		4,578.4
Cash-based incentive plans		219.2		260.2		231.8
Share-based incentive plans (note 22)		105.0		106.5		99.0
Social security costs		720.3		658.1		578.4
Pension costs (note 23)		192.0		178.1		160.0
Severance		39.5		34.5		24.0
Other staff costs1		1,210.7		1,151.9		981.0
		8,319.0		7,784.9		6,652.6

Note

¹ Freelance and temporary staff costs are included in other staff costs.

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Finance income, finance costs and revaluation of financial instruments (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Finance Income, Finance Costs and Revaluation of Financial Instruments

Finance income includes:

	2017 £m		2016 £m		2015 £m
Income from available for sale investments		16.8		12.5		18.9
Interest income		78.4		67.9		53.5
		95.2		80.4		72.4

Finance costs include:

	2017 £m		2016 £m		2015 £m
Net interest expense on pension plans (note 23)		6.3		6.7		7.3
Interest on other long-term employee benefits		3.9		2.7		2.5
Interest expense and similar charges1		259.6		245.1		214.3
		269.8		254.5		224.1

Revaluation of financial instruments² include:

	2017 £m		2016 £m			2015 £m
Movements in fair value of treasury instruments		1.1		(19.5	)		(3.7	)
Movements in fair value of other derivatives		–		–			15.9
Revaluation of put options over non-controlling interests		52.5		(17.2	)		(11.3	)
Revaluation of payments due to vendors (earnout agreements)		208.6		(11.6	)		(35.6	)
		262.2		(48.3	)		(34.7	)

Notes

¹  Interest expense and similar charges are payable on bank overdrafts, bonds and bank loans held at amortised cost.

²  Financial instruments are held at fair value through profit and loss.

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Taxation (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Tax Charge

The tax charge comprises:

	2017 £m		2016 £m			2015 £m
Corporation tax
Current year		523.4		569.4			403.0
Prior years		(98.6)		(80.3	)		(108.4	)
		424.8		489.1			294.6
Deferred tax
Current year		(235.2)		(88.0	)		(35.8	)
Prior years		7.4		(12.2	)		(11.3	)
		(227.8)		(100.2	)		(47.1	)
Tax charge		197.0		388.9			247.5

Tax Charge Reconciled to Profit Before Taxation

The tax charge for the year can be reconciled to profit before taxation in the consolidated income statement as follows:

	2017 £m		2016 £m			2015 £m
Profit before taxation		2,109.3		1,890.5			1,492.6
Tax at the corporation tax rate of 19.25%1		406.0		378.1			302.3
Tax effect of share of results of associates		(21.8)		(10.0	)		(9.5	)
Irrecoverable withholding taxes		37.0		36.3			25.7
Items that are not deductible/(taxable) in determining taxable profit		(3.9)		9.4			25.4
Effect of different tax rates in subsidiaries operating in other jurisdictions		140.3		60.4			49.9
US Transition Tax related to unremitted foreign earnings		28.1		–			–
Effect of change in US tax rate on deferred tax balances		(234.1)		–			–
Origination and reversal of unrecognised temporary differences		(17.2)		(4.3	)		0.4
Tax losses not recognised or utilised in the year		32.5		52.2			4.0
Utilisation of tax losses not previously recognised		(10.4)		(11.3	)		(10.4	)
Recognition of temporary differences not previously recognised		(68.3)		(29.4	)		(20.6	)
Net release of prior year provisions in relation to acquired businesses		(15.0)		(23.3	)		(22.9	)
Other prior year adjustments		(76.2)		(69.2	)		(96.8	)
Tax charge		197.0		388.9			247.5
Effective tax rate on profit before tax		9.3%		20.6	%		16.6	%

Note

¹  The parent company of the Group is tax resident in the UK. As such, the tax rate in the tax reconciliation for 2017 is the UK corporation tax rate of 19.25% (2016: 20%, 2015: 20.25%).

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Ordinary dividends (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Ordinary Dividends

Amounts recognised as distributions to equity holders in the year:

	2017		2016		2015		2017		2016		2015
Per share	Pence per share						£m		£m		£m
2016 Final dividend		37.05p		28.78p		26.58p		467.2		368.5		343.2
2017 Interim dividend		22.70p		19.55p		15.91p		284.3		248.0		202.6
		59.75p		48.33p		42.49p		751.5		616.5		545.8

Proposed final dividend for the year ended 31 December 2017:

	2017		2016		2015
Per share	Pence per share
Final dividend		37.30p		37.05p		28.78p

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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Calculation of Basic and Diluted EPS

The calculation of basic EPS is as follows:

	2017			2016			2015
Earnings1 (£m)		1,816.6			1,400.1			1,160.2
Average shares used in basic EPS calculation (m)		1,261.1			1,277.8			1,288.5
EPS		144.0	p		109.6	p		90.0	p

Note

¹  Earnings is equivalent to profit for the year attributable to equity holders of the parent.

Diluted EPS

The calculation of diluted EPS is as follows:

	2017			2016			2015
Diluted earnings (£m)		1,816.6			1,400.1			1,160.2
Average shares used in diluted EPS calculation (m)		1,275.8			1,296.0			1,313.0
Diluted EPS		142.4	p		108.0	p		88.4	p

Reconciliation Between Shares Used in Calculating Basic and Diluted EPS

A reconciliation between the shares used in calculating basic and diluted EPS is as follows:

	2017 m		2016 m		2015 m
Average shares used in basic EPS calculation		1,261.1		1,277.8		1,288.5
Dilutive share options outstanding		1.8		2.4		3.5
Other potentially issuable shares		12.9		15.8		21.0
Shares used in diluted EPS calculation		1,275.8		1,296.0		1,313.0

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Sources of finance (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Equity and Debt Financing

The following table summarises the equity and debt financing of the Group, and changes during the year:

			Shares					Debt
	2017 £m		2016 £m		2017 £m			2016 £m
Analysis of changes in financing
Beginning of year		695.4		668.2		6,033.1			5,157.4
Ordinary shares issued		6.4		27.2		–			–
Net increase/(decrease) in drawings on bank loans and corporate bonds		–		–		599.6			(22.5	)
Amortisation of financing costs included in net debt		–		–		8.0			9.0
Debt acquired		–		–		–			144.4
Other movements		–		–		(6.9	)		(13.1	)
Exchange adjustments		–		–		(152.5	)		757.9
End of year		701.8		695.4		6,481.3			6,033.1

Note

The table above excludes bank overdrafts which fall within cash and cash equivalents for the purposes of the consolidated cash flow statement.

Analysis of Future Anticipated Cash Flows in Relation to Group's Financial Derivatives and Debt

The following table is an analysis of future anticipated cash flows in relation to the Group’s debt, on an undiscounted basis which, therefore, differs from the fair value and carrying value:

	2017 £m			2016 £m
Within one year		(391.7	)		(582.9	)
Between one and two years		(896.3	)		(389.5	)
Between two and three years		(584.3	)		(893.0	)
Between three and four years		(1,537.8	)		(369.1	)
Between four and five years		(487.9	)		(812.9	)
Over five years		(4,519.1	)		(5,144.7	)
Debt financing (including interest) under the Revolving Credit Facility and in relation to unsecured loan notes		(8,417.1	)		(8,192.1	)
Short-term overdrafts – within one year		(393.2	)		(534.3	)
Future anticipated cash flows		(8,810.3	)		(8,726.4	)
Effect of discounting/financing rates		1,935.8			2,159.0
Debt financing		(6,874.5	)		(6,567.4	)

The following table is an analysis of future anticipated cash flows in relation to the Group’s financial derivatives, which include interest rate swaps, cash flow hedges and other foreign exchange swaps:

	Financial liabilities				Financial assets
2017	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		97.8		96.7		123.7		128.8
Between one and two years		21.4		20.1		38.6		38.8
Between two and three years		20.5		18.8		39.5		38.6
Between three and four years		20.7		18.6		851.7		851.0
Between four and five years		523.5		521.1		–		–
Over five years		–		–		–		–
		683.9		675.3		1,053.5		1,057.2

	Financial liabilities				Financial assets
2016	Payable £m		Receivable £m		Payable £m		Receivable £m
Within one year		183.2		183.0		282.5		302.2
Between one and two years		19.2		20.6		51.7		55.4
Between two and three years		18.8		18.1		57.5		58.5
Between three and four years		20.0		18.1		61.2		60.5
Between four and five years		20.7		18.1		1,687.3		1,686.1
Over five years		521.3		518.1		–		–
		783.2		776.0		2,140.2		2,162.7

Analysis of Fixed and Floating Rate Debt by Currency

Analysis of fixed and floating rate debt by currency including the effect of interest rate and cross-currency swaps:

2017 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,146.1		4.62%		n/a		199
	– floating		1,760.9		n/a		LIBOR		n/a
£	– fixed		600.0		4.04%		n/a		245
€	– fixed		2,623.9		1.85%		n/a		80
	– floating		222.2		n/a		EURIBOR		n/a
Other			128.2		n/a		n/a		n/a
			6,481.3

2016 Currency		£m		Fixed rate1		Floating basis		Period (months)1
$	– fixed		1,255.6		4.62%		n/a		212
	– floating		1,063.1		n/a		LIBOR		n/a
£	– fixed		800.0		4.53%		n/a		193
	– floating		200.0		n/a		LIBOR		n/a
€	– fixed		2,521.9		1.85%		n/a		93
Other			192.5		n/a		n/a		n/a
			6,033.1

Note

¹  Weighted average. These rates do not include the effect of gains on interest rate swap terminations that are written to income over the life of the original instrument.

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Analysis of cash flows (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Analysis of Cash Flows

The following tables analyse the items included within the main cash flow headings on page F-11.

Net cash from operating activities:

	2017 £m			2016 £m			2015 £m
Profit for the year		1,912.3			1,501.6			1,245.1
Taxation		197.0			388.9			247.5
Revaluation of financial instruments		(262.2	)		48.3			34.7
Finance costs		269.8			254.5			224.1
Finance income		(95.2	)		(80.4	)		(72.4	)
Share of results of associates		(113.5	)		(49.8	)		(47.0	)
Adjustments for:
Non-cash share-based incentive plans (including share options)		105.0			106.5			99.0
Depreciation of property, plant and equipment		230.7			220.8			194.7
Impairment of goodwill		27.1			27.0			15.1
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Amortisation of other intangible assets		36.3			38.6			33.7
Investment write-downs		95.9			86.1			78.7
Gains on disposal of investments and subsidiaries		(129.0	)		(44.3	)		(131.0	)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Losses on sale of property, plant and equipment		1.1			0.8			1.1
(Increase)/decrease in inventories and work in progress		(44.6	)		(16.7	)		7.8
Increase in trade receivables and accrued income		(45.8	)		(53.7	)		(882.7	)
(Decrease)/increase in trade payables and deferred income		(170.8	)		188.7			713.4
(Increase)/decrease in other receivables		(110.6	)		77.4			(39.0	)
(Decrease)/increase in other payables – short term		(122.8	)		(303.7	)		74.5
Increase in other payables – long-term		20.1			4.5			24.2
Decrease in provisions		(57.3	)		(47.8	)		(62.3	)
Corporation and overseas tax paid		(424.7	)		(414.2	)		(301.2	)
Interest and similar charges paid		(246.6	)		(242.1	)		(212.0	)
Interest received		76.9			73.9			61.3
Investment income		16.8			12.5			4.9
Dividends from associates		46.8			60.4			72.6
Net cash inflow from operating activities		1,408.1			1,773.8			1,359.9

Acquisitions and disposals:

	2017 £m			2016 £m			2015 £m
Initial cash consideration		(214.8	)		(424.1	)		(463.5	)
Cash and cash equivalents acquired (net)		28.9			57.3			57.7
Earnout payments		(199.1	)		(92.3	)		(43.9	)
Purchase of other investments (including associates)		(92.5	)		(260.2	)		(283.2	)
Proceeds on disposal of investments and subsidiaries		296.0			80.5			63.4
Acquisitions and disposals		(181.5	)		(638.8	)		(669.5	)
Cash consideration for non-controlling interests		(47.3	)		(58.3	)		(23.6	)
Net cash outflow		(228.8	)		(697.1	)		(693.1	)
Share repurchases and buy-backs:
	2017 £m			2016 £m			2015 £m
Purchase of own shares by ESOP Trusts	(214.6)			(152.9)			(181.6)
Shares purchased into treasury		(289.6	)		(274.5	)		(406.0	)
Net cash outflow		(504.2	)		(427.4	)		(587.6	)
Net increase/(decrease) in borrowings:
Proceeds from issue of €250 million bonds	214.0			–			–
Repayment of £400 million bonds		(400.0	)		–			–
Proceeds from issue of £400 million bonds	–			400.0			–
Repayment of €498 million bonds		–			(392.1	)		–
Proceeds from issues of €600 million bonds		–			–			858.7
Repayment of €500 million bonds		–			–			(481.9	)
Premium on exchange of €252 million bonds		–			–			(13.7	)
Increase/(decrease) in drawings on bank loans		785.6			(30.4	)		128.9
Net cash inflow/(outflow)		599.6			(22.5	)		492.0
Cash and cash equivalents:
	2017 £m			2016 £m			2015 £m
Cash at bank and in hand		2,049.6			2,256.2			2,227.8
Short-term bank deposits		341.8			180.7			154.6
Overdrafts1		(393.2	)		(534.3	)		(435.8	)
		1,998.2			1,902.6			1,946.6

Note

¹  Bank overdrafts are included in cash and cash equivalents because they form an integral part of the Group’s cash management.

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Intangible assets (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Movements of Goodwill

Goodwill

The movements in 2017 and 2016 were as follows:

	£m
Cost:
1 January 2016		11,294.2
Additions1		796.6
Revision of earnout estimates		28.4
Exchange adjustments		1,820.2
31 December 2016		13,939.4
Additions1		301.0
Revision of earnout estimates		(60.7	)
Exchange adjustments		(504.4	)
31 December 2017		13,675.3
Accumulated impairment losses and write-downs:
1 January 2016		623.6
Impairment losses for the year		20.0
Exchange adjustments		81.5
31 December 2016		725.1
Impairment losses for the year		27.1
Exchange adjustments		(29.8	)
31 December 2017		722.4
Net book value:
31 December 2017		12,952.9
31 December 2016		13,214.3
1 January 2016		10,670.6

Note

¹  Additions represent goodwill arising on the acquisition of subsidiary undertakings including the effect of any revisions to fair value adjustments that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations. The effect of such revisions was not material in either year presented. Goodwill arising on the acquisition of associate undertakings is shown within interests in associates and joint ventures in note 14.

Cash-generating Units with Significant Goodwill

Cash-generating units with significant goodwill as at 31 December are:

	2017 £m		2016 £m
GroupM		2,906.7		2,966.2
Kantar		2,518.2		2,573.0
Wunderman		1,514.5		1,297.1
Y&R Advertising		1,091.8		1,140.3
Burson-Marsteller		557.6		590.3
Other		4,364.1		4,647.4
Total goodwill		12,952.9		13,214.3

Movements of Other Intangible Assets

Other intangible assets

The movements in 2017 and 2016 were as follows:

	Brands with an indefinite useful life £m			Acquired intangibles £m			Other £m			Total £m
Cost:
1 January 2016		968.1			2,007.1			331.0			3,306.2
Additions		–			–			33.0			33.0
Disposals		–			(0.8	)		(42.2	)		(43.0	)
New acquisitions		–			319.1			10.5			329.6
Other movements1		–			11.6			4.7			16.3
Exchange adjustments		173.2			198.5			67.1			438.8
31 December 2016		1,141.3			2,535.5			404.1			4,080.9
Additions		–			–			37.3			37.3
Disposals		–			–			(15.8	)		(15.8	)
New acquisitions		–			79.0			0.8			79.8
Other movements1		–			6.4			7.2			13.6
Exchange adjustments		(60.0	)		(73.1	)		(22.1	)		(155.2	)
31 December 2017		1,081.3			2,547.8			411.5			4,040.6
Amortisation and impairment:
1 January 2016		–			1,339.5			251.3			1,590.8
Charge for the year		–			163.3			38.6			201.9
Disposals		–			(0.4	)		(39.5	)		(39.9	)
Other movements		–			–			2.0			2.0
Exchange adjustments		–			60.6			48.2			108.8
31 December 2016		–			1,563.0			300.6			1,863.6
Charge for the year		–			189.4			36.3			225.7
Disposals		–			–			(14.9	)		(14.9	)
Other movements		–			–			2.5			2.5
Exchange adjustments		–			(33.7	)		(21.0	)		(54.7	)
31 December 2017		–			1,718.7			303.5			2,022.2
Net book value:
31 December 2017		1,081.3			829.1			108.0			2,018.4
31 December 2016		1,141.3			972.5			103.5			2,217.3
1 January 2016		968.1			667.6			79.7			1,715.4

Note

¹  Other movements in acquired intangibles include revisions to fair value adjustments arising on the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

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Property, plant and equipment (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Property, Plant and Equipment

The movements in 2017 and 2016 were as follows:

	Land £m		Freehold buildings £m			Leasehold buildings £m			Fixtures, fittings and equipment £m			Computer equipment £m			Total £m
Cost:
1 January 2016		37.1		102.2			837.4			338.3			602.9			1,917.9
Additions		–		1.3			107.9			55.9			87.0			252.1
New acquisitions		–		–			7.9			6.5			6.2			20.6
Disposals		–		(0.3	)		(83.2	)		(46.1	)		(106.4	)		(236.0	)
Exchange adjustments		–		23.2			142.5			48.0			153.7			367.4
31 December 2016		37.1		126.4			1,012.5			402.6			743.4			2,322.0
Additions		–		4.3			165.0			31.7			87.9			288.9
New acquisitions		–		–			2.0			2.4			1.1			5.5
Disposals		–		(1.2	)		(46.1	)		(40.7	)		(54.6	)		(142.6	)
Exchange adjustments		–		(10.7	)		(51.6	)		(18.8	)		(74.8	)		(155.9	)
31 December 2017		37.1		118.8			1,081.8			377.2			703.0			2,317.9
Depreciation:
1 January 2016		–		19.2			423.2			208.9			468.9			1,120.2
Charge for the year		–		4.3			81.1			45.7			89.7			220.8
Disposals		–		(0.6	)		(77.8	)		(49.2	)		(101.4	)		(229.0	)
Exchange adjustments		–		2.3			83.3			34.6			121.1			241.3
31 December 2016		–		25.2			509.8			240.0			578.3			1,353.3
Charge for the year		–		6.9			86.7			47.0			90.1			230.7
Disposals		–		(1.9	)		(42.6	)		(35.9	)		(54.4	)		(134.8	)
Exchange adjustments		–		(1.7	)		(27.8	)		(14.2	)		(67.1	)		(110.8	)
31 December 2017		–		28.5			526.1			236.9			546.9			1,338.4
Net book value:
31 December 2017		37.1		90.3			555.7			140.3			156.1			979.5
31 December 2016		37.1		101.2			502.7			162.6			165.1			968.7
1 January 2016		37.1		83.0			414.2			129.4			134.0			797.7

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Interests in associates, joint ventures and other investments (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Movements in Associates, Joint Ventures and Other Investments

The movements in 2017 and 2016 were as follows:

	Net assets of associates and joint ventures £m			Goodwill and other intangibles of associates and joint ventures £m			Total associates and joint ventures £m			Other investments £m
1 January 2016		334.1			424.5			758.6			1,158.7
Additions		(1.3	)		–			(1.3	)		233.5
Goodwill arising on acquisition of new associates		–			292.2			292.2			–
Share of results of associate undertakings (note 4)		49.8			–			49.8			–
Dividends		(60.4	)		–			(60.4	)		–
Other movements		(45.3	)		52.4			7.1			–
Reclassification from other investments to associates		43.6			30.7			74.3			(74.3	)
Exchange adjustments		61.6			50.1			111.7			170.4
Disposals		(12.7	)		–			(12.7	)		(3.4	)
Reclassification to subsidiaries		(44.2	)		(88.8	)		(133.0	)		(0.2	)
Revaluation of other investments		–			–			–			(93.1	)
Amortisation of other intangible assets		–			(5.1	)		(5.1	)		–
Goodwill impairment		–			(7.0	)		(7.0	)		–
Write-downs		(4.8	)		–			(4.8	)		(81.3	)
31 December 2016		320.4			749.0			1,069.4			1,310.3
Additions		34.1			–			34.1			67.7
Goodwill arising on acquisition of new associates		–			0.4			0.4			–
Share of results of associate undertakings (note 4)		113.5			–			113.5			–
Dividends		(46.8	)		–			(46.8	)		–
Other movements		4.7			(1.3	)		3.4			–
Reclassification from other investments to associates		57.1			–			57.1			(57.1	)
Exchange adjustments		(7.3	)		(3.3	)		(10.6	)		(106.1	)
Disposals		(59.2	)		(79.9	)		(139.1	)		(1.7	)
Reclassification to subsidiaries		(3.4	)		(2.9	)		(6.3	)		–
Revaluation of other investments		–			–			–			32.1
Amortisation of other intangible assets		–			(5.7	)		(5.7	)		–
Write-downs		(4.2	)		–			(4.2	)		(91.7	)
31 December 2017		408.9			656.3			1,065.2			1,153.5

Principal Associates and Joint Ventures

The Group’s principal associates and joint ventures at 31 December 2017 included:

	% owned		Country of incorporation
Barrows Design and Manufacturing (Pty) Limited		35.0		South Africa
Bruin Sports Capital LLC		38.2		USA
Chime Communications Ltd		24.9		UK
CVSC Sofres Media Co Limited		40.0		China
GIIR Inc		30.0		Korea
Globant S.A.1		19.2		Argentina
Haworth Marketing & Media Company		49.0		USA
High Co SA		34.1		France
Imagina		23.5		Spain
Marktest Investimentos SGPS S.A.		43.1		Portugal
Richard Attias and Associates		49.0		USA
Smollan Holdings (Pty) Ltd		24.8		South Africa

Note

¹Although the Group holds less than 20% of Globant S.A, it is considered to be an associate as the Group exercises significant influence over the entity.

Summary of Aggregate Financial Performance and Net Asset Position of Associates and Joint Ventures

The following tables present a summary of the aggregate financial performance and net asset position of the Group’s associate undertakings and joint ventures. These have been estimated and converted, where appropriate, to an IFRS presentation based on information provided by the relevant companies at 31 December 2017.

	2017 £m			2016 £m			2015 £m
Income statement
Revenue		3,800.8			2,254.5			2,049.5
Operating profit		440.4			308.3			283.7
Profit before taxation		381.9			237.2			236.5
Profit for the year		312.5			156.7			162.0
	2017 £m			2016 £m			2015 £m
Balance sheet
Assets		3,192.9			4,223.1			3,912.4
Liabilities		(1,633.7	)		(1,900.0	)		(1,906.2	)
Net assets		1,559.2			2,323.1			2,006.2

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Deferred tax (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Analysis of Deferred Tax Balances for Financial Reporting Purposes

The following is the analysis of the deferred tax balances for financial reporting purposes:

	Gross 2017 £m			Offset 2017 £m			As reported 2017 £m			Gross 2016 £m			Offset 2016 £m			As reported 2016 £m
Deferred tax assets		411.8			(251.5	)		160.3			598.0			(457.6	)		140.4
Deferred tax liabilities		(765.2	)		251.5			(513.7	)		(1,150.0	)		457.6			(692.4	)
		(353.4	)		–			(353.4	)		(552.0	)		–			(552.0	)

Movements of Major Gross Deferred Tax Assets

The following are the major gross deferred tax assets recognised by the Group and movements thereon in 2017 and 2016:

	Deferred compensation £m			Accounting provisions & accruals £m			Retirement benefit obligations £m			Property, plant & equipment £m			Tax losses & credits £m			Share- based payments £m			Restructuring provisions £m			Other temporary differences £m			Total £m
1 January 2016		41.9			49.5			91.0			44.7			71.3			78.8			16.9			16.6			410.7
Acquisition of subsidiaries		–			7.1			–			–			–			0.2			–			15.0			22.3
Credit/(charge) to income		39.5			8.5			28.3			19.2			6.2			(1.8	)		(11.7	)		7.7			95.9
Credit to other comprehensive income		–			–			1.8			–			–			–			–			–			1.8
Charge to equity		–			–			–			–			–			(15.0	)		–			–			(15.0	)
Exchange differences		14.2			15.5			20.3			6.9			12.2			13.6			0.7			(1.1	)		82.3
31 December 2016		95.6			80.6			141.4			70.8			89.7			75.8			5.9			38.2			598.0
Acquisition of subsidiaries		–			–			–			–			–			–			–			2.6			2.6
(Charge)/credit to income		(5.5	)		6.6			(10.2	)		6.9			(34.4	)		(0.4	)		(1.5	)		(21.7	)		(60.2	)
Impact of US tax reform		(30.8	)		(8.1	)		(29.1	)		(6.8	)		23.1			(10.9	)		1.6			(1.1	)		(62.1	)
Charge to other comprehensive income		–			–			(20.9	)		–			–			–			–			–			(20.9	)
Charge to equity		–			–			–			–			–			(27.3	)		–			–			(27.3	)
Exchange differences		(5.8	)		5.8			(5.6	)		(2.5	)		(5.7	)		(4.2	)		(0.2	)		(0.1	)		(18.3	)
31 December 2017		53.5			84.9			75.6			68.4			72.7			33.0			5.8			17.9			411.8

Movements of Gross Deferred Tax Liabilities

In addition the Group has recognised the following gross deferred tax liabilities and movements thereon in 2017 and 2016:

	Brands and other intangibles £m			Associate earnings £m			Goodwill £m			Property, plant & equipment £m			Financial instruments £m			Other temporary differences £m			Total £m
1 January 2016		577.1			22.5			176.7			30.9			50.7			11.0			868.9
Acquisition of subsidiaries		114.8			–			–			–			–			–			114.8
(Credit)/charge to income		(51.3	)		3.1			23.5			(0.4	)		3.5			17.3			(4.3	)
Charge to other comprehensive income		–			–			–			–			–			2.2			2.2
Exchange differences		115.3			2.7			32.3			5.7			9.8			2.6			168.4
31 December 2016		755.9			28.3			232.5			36.2			64.0			33.1			1,150.0
Acquisition of subsidiaries		21.4			–			–			–			–			–			21.4
(Credit)/charge to income		(49.9	)		(6.0	)		0.7			(0.5	)		(3.3	)		5.1			(53.9	)
Impact of US tax reform		(203.8	)		–			(76.3	)		(11.9	)		(22.2	)		18.0			(296.2	)
Charge to other comprehensive income		–			–			–			–			–			3.7			3.7
Exchange differences		(34.4	)		(0.7	)		(16.5	)		(2.6	)		(2.3	)		(3.3	)		(59.8	)
31 December 2017		489.2			21.6			140.4			21.2			36.2			56.6			765.2

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Inventory and work in progress (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Inventory and Work in Progress

The following are included in the net book value of inventory and work in progress:

	2017 £m		2016 £m
Work in progress		401.1		383.1
Inventory		23.2		17.3
		424.3		400.4

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Trade and other receivables (Tables)

12 Months Ended

Dec. 31, 2017

Within one year [member]

Summary of Trade and Other Receivables

The following are included in trade and other receivables:

Amounts falling due within one year:

	2017 £m		2016 £m
Trade receivables (net of bad debt provision)		7,889.7		8,054.2
VAT and sales taxes recoverable		202.3		157.2
Prepayments		298.3		310.0
Accrued income		3,211.7		3,353.8
Fair value of derivatives		1.0		14.7
Other debtors		509.3		484.6
		12,112.3		12,374.5

Greater than 1 year [member]

Summary of Trade and Other Receivables

Amounts falling due after more than one year:

	2017 £m		2016 £m
Prepayments		3.6		3.7
Accrued income		20.5		9.5
Fair value of derivatives		2.1		8.3
Other debtors		150.0		183.4
		176.2		204.9

Trade and other receivable [member]

Ageing of Trade Receivables and Other Financial Assets

The ageing of trade receivables and other financial assets is as follows:

2017	Carrying amount at 31 December 2017 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days  £m		91-180 days  £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		7,889.7		5,466.6		1,629.6		577.0		143.0		48.8		24.7
Other financial assets		500.4		331.2		107.0		6.6		4.7		10.3		40.6
		8,390.1		5,797.8		1,736.6		583.6		147.7		59.1		65.3
2016	Carrying amount at 31 December 2016 £m		Neither past due nor impaired £m		0-30 days £m		31-90 days  £m		91-180 days  £m		181 days- 1 year £m		Greater than 1 year £m
Trade receivables		8,054.2		5,545.6		1,611.0		683.6		156.6		37.2		20.2
Other financial assets		504.5		335.0		91.3		16.3		6.7		11.9		43.3
		8,558.7		5,880.6		1,702.3		699.9		163.3		49.1		63.5

Bad Debt Provisions

Bad debt provisions:

	2017 £m			2016 £m			2015 £m
Balance at beginning of year		93.8			85.4			85.3
New acquisitions		1.2			1.8			1.0
Charged to operating costs		27.4			15.5			21.6
Exchange adjustments		(4.1	)		13.7			0.2
Utilisations and other movements		(27.0	)		(22.6	)		(22.7	)
Balance at end of year		91.3			93.8			85.4

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Trade and other payables: amounts falling due within one year (Tables)

12 Months Ended

Dec. 31, 2017

Within one year [member]

Summary of Trade and Other Payables

The following are included in trade and other payables falling due within one year:

	2017 £m		2016 £m
Trade payables		9,893.0		10,308.3
Deferred income		1,212.1		1,312.7
Payments due to vendors (earnout agreements)		180.7		277.5
Liabilities in respect of put option agreements with vendors		38.6		51.0
Fair value of derivatives		3.5		4.1
Other creditors and accruals		2,913.2		3,056.8
		14,241.1		15,010.4

Greater than 1 year [member]

Summary of Trade and Other Payables

The following are included in trade and other payables falling due after more than one year:

	2017 £m		2016 £m
Payments due to vendors (earnout agreements)		450.0		699.0
Liabilities in respect of put option agreements with vendors		219.5		246.0
Fair value of derivatives		3.3		1.8
Other creditors and accruals		320.0		327.0
		992.8		1,273.8

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Trade and other payables: amounts falling due after more than one year (Tables) - Trade and Other Payable [member]

12 Months Ended

Dec. 31, 2017

Maturity Analysis for Non-derivative Financial Liabilities

The following tables set out payments due to vendors, comprising contingent consideration and the directors’ best estimates of future earnout-related obligations:

	2017 £m		2016 £m
Within one year		180.7		277.5
Between one and two years		128.3		220.1
Between two and three years		144.1		170.2
Between three and four years		58.3		176.6
Between four and five years		103.1		122.4
Over five years		16.2		9.7
		630.7		976.5

Summary of Contingent Consideration

	2017 £m			2016 £m
At beginning of year		976.5			581.3
Earnouts paid (note 11)		(199.1	)		(92.3	)
New acquisitions		163.7			359.5
Revision of estimates taken to goodwill (note 12)		(60.7	)		28.4
Revaluation of payments due to vendors (note 6)		(208.6	)		11.6
Exchange adjustments		(41.1	)		88.0
At end of year		630.7			976.5

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Bank overdrafts, bonds and bank loans (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Bank Overdrafts, Bonds and Bank Loans Amounts Falling Due Within One Year

Amounts falling due within one year:

	2017 £m		2016 £m
Bank overdrafts		393.2		534.3
Corporate bonds and bank loans		230.9		468.2
		624.1		1,002.5

Corporate Bonds and Bank Loans Amounts Falling Due After More Than One Year

Amounts falling due after more than one year:

	2017 £m		2016 £m
Corporate bonds and bank loans		6,250.4		5,564.9

Maturity Analysis for Non-derivative Financial Liabilities

The corporate bonds, bank loans and overdrafts included within liabilities fall due for repayment as follows:

	2017 £m		2016 £m
Within one year		624.1		1,002.5
Between one and two years		727.6		208.0
Between two and three years		421.0		717.2
Between three and four years		1,384.2		195.7
Between four and five years		356.6		660.9
Over five years		3,361.0		3,783.1
		6,874.5		6,567.4

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Provisions for liabilities and charges (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Provisions for Liabilities and Charges

The movements in 2017 and 2016 were as follows:

	Property £m			Other £m			Total £m
1 January 2016		52.7			130.9			183.6
Charged to the income statement		5.8			14.5			20.3
Acquisitions1		11.1			3.9			15.0
Utilised		(14.7	)		(18.1	)		(32.8	)
Released to the income statement		(2.9	)		(3.7	)		(6.6	)
Transfers		(1.6	)		14.6			13.0
Exchange adjustments		8.1			27.3			35.4
31 December 2016		58.5			169.4			227.9
Charged to the income statement		4.1			16.9			21.0
Acquisitions1		4.0			22.8			26.8
Utilised		(6.0	)		(21.4	)		(27.4	)
Released to the income statement		(5.5	)		(5.9	)		(11.4	)
Transfers		0.1			7.1			7.2
Exchange adjustments		(2.6	)		(12.5	)		(15.1	)
31 December 2017		52.6			176.4			229.0

Note

¹  Acquisitions include £21.9 million (2016: £3.4 million) of provisions arising from revisions to fair value adjustments related to the acquisition of subsidiary undertakings that had been determined provisionally at the immediately preceding balance sheet date, as permitted by IFRS 3 Business Combinations.

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Share-based payments (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Charges for Share-based Incentive Plans

Charges for share-based incentive plans were as follows:

	2017 £m		2016 £m		2015 £m
Share-based payments (note 5)		105.0		106.5		99.0

Movement on Ordinary Shares Granted for Significant Restricted Stock Plans

Movement on ordinary shares granted for significant restricted stock plans:

Non-vested 1 January 2017 number m

Granted number m

Lapsed number m

Vested number m

Non-vested 31 December 2017 number m

LEAP III1

0.8

4.0

–

(4.8

)

–

Executive Performance Share Plan (EPSP)

8.0

2.0

(0.9

)

–

9.1

Performance Share Awards (PSA)

1.2

1.2

(0.2

)

(0.3

)

1.9

Leaders, Partners and High Potential Group

6.4

3.1

(0.7

)

(2.0

)

6.8

Weighted average fair value (pence per share):

LEAP III1

860p

860p

–

860p

–

Executive Performance Share Plan (EPSP)

1,373p

1,309p

1,286p

–

1,368p

Performance Share Awards (PSA)

1,596p

1,681p

1,648p

1,504p

1,659p

Leaders, Partners and High Potential Group

1,534p

1,250p

1,518p

1,214p

1,502p

Note

¹  The number of shares granted represents the matched shares awarded on vest date for the 2012 LEAP III plan which vested in March 2017. The actual number of shares that vest for each LEAP III plan is dependent on the extent to which the relevant performance criteria are satisfied.

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Provision for post-employment benefits (Tables)

12 Months Ended

Dec. 31, 2017

Pension Costs

The Group’s pension costs are analysed as follows:

	2017 £m		2016 £m		2015 £m
Defined contribution plans		175.9		153.5		135.0
Defined benefit plans charge to operating profit		16.1		24.6		25.0
Pension costs (note 5)		192.0		178.1		160.0
Net interest expense on pension plans (note 6)		6.3		6.7		7.3
		198.3		184.8		167.3

Weighted Average Assumptions Used For Actuarial Valuations

The main weighted average assumptions used for the actuarial valuations at 31 December are shown in the following table:

	2017 % pa		2016 % pa		2015 % pa		2014 % pa
UK
Discount rate1		2.4		2.5		3.7		3.4
Rate of increase in salaries2		n/a		3.5		3.1		3.1
Rate of increase in pensions in payment		4.1		4.1		3.9		3.9
Inflation		2.7		2.8		2.4		2.4
North America
Discount rate1		3.5		3.8		4.0		3.7
Rate of increase in salaries		3.1		3.1		3.0		3.0
Inflation		4.0		4.0		2.5		2.5
Western Continental Europe
Discount rate1		1.9		1.7		2.5		2.1
Rate of increase in salaries		1.9		2.0		2.3		2.2
Rate of increase in pensions in payment		1.2		1.3		1.6		2.0
Inflation		1.7		1.7		2.0		2.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe
Discount rate1		4.2		4.2		4.2		4.2
Rate of increase in salaries		5.5		5.9		5.8		6.1
Inflation		4.0		4.0		4.0		3.9

Notes

¹  Discount rates are based on high-quality corporate bond yields. In countries where there is no deep market in corporate bonds, the discount rate assumption has been set with regard to the yield on long-term government bonds.

²  The salary assumptions are no longer applicable to the UK as the plans were frozen in 2017. Active participants will not accrue additional benefits for future services under these plans.

Life Expectancies For Defined Benefit Pension Plans

At 31 December 2017, the life expectancies underlying the value of the accrued liabilities for the main defined benefit pension plans operated by the Group were as follows:

Years life expectancy after age 65	All plans		North America		UK		Western Continental Europe		Other1
– current pensioners (at age 65) – male		22.4		22.1		23.4		20.8		19.6
– current pensioners (at age 65) – female		24.0		23.6		24.4		24.0		24.8
– future pensioners (current age 45) – male		23.8		23.7		25.0		23.1		19.6
– future pensioners (current age 45) – female		25.7		25.2		26.2		26.2		24.8

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

Weighted Average Duration of Defined Benefit Pension Obligations and Distribution of Timing of Benefit Payments

The following table provides information on the weighted average duration of the defined benefit pension obligations and the distribution of the timing of benefit payments for the next 10 years. The duration corresponds to the weighted average length of the underlying cash flows.

	All plans		North America		UK		Western Continental Europe		Other1
Weighted average duration of the defined benefit obligation (years)		12.5		9.2		14.5		15.7		8.7
Expected benefit payments over the next 10 years (£m)
Benefits expected to be paid within 12 months		65.2		35.9		17.8		8.8		2.7
Benefits expected to be paid in 2019		61.8		33.4		17.4		8.5		2.5
Benefits expected to be paid in 2020		61.2		32.5		17.8		8.5		2.4
Benefits expected to be paid in 2021		62.3		32.0		18.4		8.9		3.0
Benefits expected to be paid in 2022		61.3		31.0		18.4		9.1		2.8
Benefits expected to be paid in the next five years		302.2		132.8		96.3		51.7		21.4

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe.

Sensitivity Analysis of Significant Actuarial Assumptions

	Increase/(decrease) in benefit obligation
Sensitivity analysis of significant actuarial assumptions	2017 £m			2016 £m
Discount rate
Increase by 25 basis points
UK		(13.1	)		(13.3	)
North America		(9.9	)		(10.9	)
Western Continental Europe		(9.2	)		(10.1	)
Other1		(0.6	)		(0.6	)
Decrease by 25 basis points
UK		13.8			14.1
North America		10.2			11.2
Western Continental Europe		9.8			10.6
Other1		0.6			0.6
Rate of increase in salaries
Increase by 25 basis points
UK		–			0.2
North America		0.1			–
Western Continental Europe		1.5			1.4
Other1		0.6			0.6
Decrease by 25 basis points
UK		–			(0.2	)
North America		(0.1	)		–
Western Continental Europe		(1.5	)		(1.4	)
Other1		(0.6	)		(0.6	)
Rate of increase in pensions in payment
Increase by 25 basis points
UK		2.4			2.3
Western Continental Europe		6.2			6.8
Decrease by 25 basis points
UK		(1.9	)		(2.3	)
Western Continental Europe		(5.8	)		(6.4	)
Life expectancy
Increase in longevity by one additional year
UK		16.9			17.7
North America		6.0			6.2
Western Continental Europe		7.0			7.4
Other1		–			–

Note

¹  Includes Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe

Fair Value of Assets and Assessed Present Value of Liabilities in Pension Plans

At 31 December, the fair value of the assets in the pension plans, and the assessed present value of the liabilities in the pension plans are shown in the following table:

	2017 £m			%		2016 £m			%		2015 £m			%
Equities		124.6			13.4		161.9			17.3		132.5			16.3
Bonds		520.0			55.9		566.0			60.6		479.5			58.9
Insured annuities		178.5			19.2		63.5			6.8		60.5			7.4
Property		1.3			0.1		1.6			0.2		1.5			0.2
Cash		9.9			1.1		44.9			4.8		65.1			8.0
Other		95.7			10.3		96.3			10.3		75.1			9.2
Total fair value of assets		930.0			100.0		934.2			100.0		814.2			100.0
Present value of liabilities		(1,135.4	)				(1,209.8	)				(1,039.9	)
Deficit in the plans		(205.4	)				(275.6	)				(225.7	)
Irrecoverable surplus		(0.9	)				(0.9	)				(3.6	)
Net liability1		(206.3	)				(276.5	)				(229.3	)
Plans in surplus		43.9					28.0					31.4
Plans in deficit		(250.2	)				(304.5	)				(260.7	)

Note

¹  The related deferred tax asset is discussed in note 15.

Surplus/(Deficit) in Plans by Region

All plan assets have quoted prices in active markets with the exception of insured annuities and other assets.

Surplus/(deficit) in plans by region	2017 £m			2016 £m			2015 £m
UK		31.5			20.0			30.9
North America		(89.2	)		(133.8	)		(123.4	)
Western Continental Europe		(107.7	)		(116.9	)		(97.4	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(40.0	)		(44.9	)		(35.8	)
Deficit in the plans		(205.4	)		(275.6	)		(225.7	)

Funded and Unfunded Pension Plans By Region

The following table shows the split of the deficit at 31 December between funded and unfunded pension plans.

	2017 Surplus/ (deficit) £m			2017 Present value of liabilities £m			2016 Surplus/ (deficit) £m			2016 Present value of liabilities £m			2015 Surplus/ (deficit) £m			2015 Present value of liabilities £m
Funded plans by region
UK		31.5			(387.5	)		20.0			(406.4	)		30.9			(352.6	)
North America		(21.4	)		(385.4	)		(56.0	)		(420.4	)		(45.5	)		(364.5	)
Western Continental Europe		(37.9	)		(173.3	)		(48.9	)		(180.9	)		(42.3	)		(143.9	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(4.2	)		(15.8	)		(5.8	)		(17.2	)		(4.9	)		(15.0	)
Deficit/ liabilities in the funded plans		(32.0	)		(962.0	)		(90.7	)		(1,024.9	)		(61.8	)		(876.0	)
Unfunded plans by region
UK		–			–			–			–			–			–
North America		(67.8	)		(67.8	)		(77.8	)		(77.8	)		(77.9	)		(77.9	)
Western Continental Europe		(69.8	)		(69.8	)		(68.0	)		(68.0	)		(55.1	)		(55.1	)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe		(35.8	)		(35.8	)		(39.1	)		(39.1	)		(30.9	)		(30.9	)
Deficit/ liabilities in the unfunded plans		(173.4	)		(173.4	)		(184.9	)		(184.9	)		(163.9	)		(163.9	)
Deficit/ liabilities in the plans		(205.4	)		(1,135.4	)		(275.6	)		(1,209.8	)		(225.7	)		(1,039.9	)

Pension Expense Charged to Operating Profit, Amounts Charged to Finance Costs and Amounts Recognised in Consolidated Statement of Comprehensive Income (OCI)

The following table shows the breakdown of the pension expense between amounts charged to operating profit, amounts charged to finance costs and amounts recognised in the consolidated statement of comprehensive income (OCI):

	2017 £m			2016 £m			2015 £m
Service cost1		13.0			22.4			23.0
Administrative expenses		3.1			2.2			2.0
Charge to operating profit		16.1			24.6			25.0
Net interest expense on pension plans		6.3			6.7			7.3
Charge to profit before taxation for defined benefit plans		22.4			31.3			32.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Changes in demographic assumptions underlying the present value of the plan liabilities		12.7			6.7			13.8
Changes in financial assumptions underlying the present value of the plan liabilities		(17.0	)		(92.6	)		55.4
Experience gain/(loss) arising on the plan liabilities		7.9			1.0			(1.3	)
Change in irrecoverable surplus		–			2.7			(2.7	)
Actuarial gain/(loss) recognised in OCI		17.0			(15.9	)		33.5

Note

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

Retirement benefit obligation [member]

Movement in Pension Plan Assets and Liabilities

The following table shows an analysis of the movement in the pension plan liabilities for each accounting period:

	2017 £m			2016 £m			2015 £m
Plan liabilities at beginning of year		1,209.8			1,039.9			1,144.8
Service cost1		13.0			22.4			23.0
Interest cost		32.9			37.2			34.6
Actuarial (gain)/loss
Effect of changes in demographic assumptions		(12.7	)		(6.7	)		(13.8	)
Effect of changes in financial assumptions		17.0			92.6			(55.4	)
Effect of experience adjustments		(7.9	)		(1.0	)		1.3
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Gain)/loss due to exchange rate movements		(36.4	)		124.2			13.4
Settlement payments		(1.2	)		(4.8	)		–
Other2		0.6			(1.6	)		4.6
Plan liabilities at end of year		1,135.4			1,209.8			1,039.9

Notes

¹  Includes current service cost, past service costs related to plan amendments and (gain)/loss on settlements and curtailments.

²  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

Plan assets [member]

Movement in Pension Plan Assets and Liabilities

The following table shows an analysis of the movement in the pension plan assets for each accounting period:

	2017 £m			2016 £m			2015 £m
Fair value of plan assets at beginning of year		934.2			814.2			849.5
Interest income on plan assets		26.6			30.5			27.3
Return on plan assets (excluding interest income)		13.4			66.3			(31.7	)
Employer contributions		68.2			43.7			70.9
Benefits paid		(79.7	)		(92.4	)		(112.6	)
(Loss)/gain due to exchange rate movements		(28.7	)		78.8			12.4
Settlement payments		(1.2	)		(4.8	)		–
Administrative expenses		(3.1	)		(2.2	)		(2.0	)
Other1		0.3			0.1			0.4
Fair value of plan assets at end of year		930.0			934.2			814.2
Actual return on plan assets		40.0			96.8			(4.4	)

Note

¹  Other includes acquisitions, disposals, plan participants’ contributions and reclassifications. The reclassifications represent certain of the Group’s defined benefit plans which are included in this note for the first time in the periods presented.

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Risk management policies (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Committed Facilities

At 31 December 2017, the Group has access to £7.7 billion of committed facilities with maturity dates spread over the years 2018 to 2046 as illustrated below:

	£m		2018 £m		2019 £m		2020 £m		2021 £m		2022+ £m
£ bonds £400m (2.875% ’46)		400.0										400.0
US bond $500m (5.625% ’43)		369.7										369.7
US bond $300m (5.125% ’42)		221.8										221.8
Eurobonds €600m (1.625% ’30)		533.3										533.3
Eurobonds €750m (2.25% ’26)		666.7										666.7
US bond $750m (3.75% ’24)		554.6										554.6
Eurobonds €750m (3.0% ’23)		666.7										666.7
US bond $500m (3.625% ’22)		369.7										369.7
US bond $812m (4.75% ’21)		600.7								600.7
Bank revolver ($2,500m)		1,848.6								1,848.6
£ bonds £200m (6.375% ’20)		200.0						200.0
Eurobonds €250m (3m EURIBOR + 0.32% ’20)		222.2						222.2
Eurobonds €600m (0.75% ’19)		533.3				533.3
Bank revolver (A$520m)		300.4				300.4
Eurobonds €252m (0.43% ’18)		224.0		224.0
Total committed facilities available		7,711.7		224.0		833.7		422.2		2,449.3		3,782.5
Drawn down facilities		6,547.9		224.0		729.1		422.2		1,390.1		3,782.5
Undrawn committed credit facilities		1,163.8

XML

Financial instruments (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Analysis of Financial Assets and Liabilities

An analysis of the Group’s financial assets and liabilities by accounting classification is set out below:

	Derivatives in designated hedge relationships		Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m		£m			£m		£m		£m			£m
2017
Other investments		–		–			–		1,153.5		–			1,153.5
Cash and short-term deposits		–		–			2,391.4		–		–			2,391.4
Bank overdrafts, bonds and bank loans		–		–			–		–		(624.1	)		(624.1	)
Bonds and bank loans		–		–			–		–		(6,250.4	)		(6,250.4	)
Trade and other receivables: amounts falling due within one year		–		–			8,328.4		–		–			8,328.4
Trade and other receivables: amounts falling due after more than one year		–		–			61.7		–		–			61.7
Trade and other payables: amounts falling due within one year		–		–			–		–		(9,970.5	)		(9,970.5	)
Trade and other payables: amounts falling due after more than one year		–		–			–		–		(8.5	)		(8.5	)
Derivative assets		2.1		1.0			–		–		–			3.1
Derivative liabilities		(3.3)		(3.5	)		–		–		–			(6.8	)
Payments due to vendors (earnout agreements) (note 19)		–		(630.7	)		–		–		–			(630.7	)
Liabilities in respect of put options		–		(258.1	)		–		–		–			(258.1	)
		(1.2)		(891.3	)		10,781.5		1,153.5		(16,853.5	)		(5,811.0	)

	Derivatives in designated hedge relationships			Held for trading			Loans & receivables		Available for sale		Amortised cost			Carrying value
	£m			£m			£m		£m		£m			£m
2016
Other investments		–			–			–		1,310.3		–			1,310.3
Cash and short-term deposits		–			–			2,436.9		–		–			2,436.9
Bank overdrafts, bonds and bank loans		–			–			–		–		(1,002.5	)		(1,002.5	)
Bonds and bank loans		–			–			–		–		(5,564.9	)		(5,564.9	)
Trade and other receivables: amounts falling due within one year		–			–			8,468.8		–		–			8,468.8
Trade and other receivables: amounts falling due after more than one year		–			–			89.9		–		–			89.9
Trade and other payables: amounts falling due within one year		–			–			–		–		(10,398.9	)		(10,398.9	)
Trade and other payables: amounts falling due after more than one year		–			–			–		–		(8.4	)		(8.4	)
Derivative assets		20.0			3.0			–		–		–			23.0
Derivative liabilities		(3.0	)		(2.9	)		–		–		–			(5.9	)
Payments due to vendors (earnout agreements) (note 19)		–			(976.5	)		–		–		–			(976.5	)
Liabilities in respect of put options		–			(297.0	)		–		–		–			(297.0	)
		17.0			(1,273.4	)		10,995.6		1,310.3		(16,974.7	)		(5,925.2	)

Analysis of Financial Instruments Measured at Fair Value

The following table provides an analysis of financial instruments that are measured subsequent to initial recognition at fair value, grouped into levels 1 to 3 based on the degree to which the fair value is observable:

Level 1 fair value measurements are those derived from quoted prices (unadjusted) in active markets for identical assets or liabilities;

Level 2 fair value measurements are those derived from inputs other than quoted prices included within level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices);

Level 3 fair value measurements are those derived from valuation techniques that include inputs for the asset or liability that are not based on observable market data (unobservable inputs).

	Level 1 £m		Level 2 £m			Level 3 £m
2017
Derivatives in designated hedge relationships
Derivative assets		–		2.1			–
Derivative liabilities		–		(3.3	)		–
Held for trading
Derivative assets		–		1.0			–
Derivative liabilities		–		(3.5	)		–
Payments due to vendors (earnout agreements)  (note 19)		–		–			(630.7	)
Liabilities in respect of put options		–		–			(258.1	)
Available for sale
Other investments		333.2		–			820.3

	Level 1 £m		Level 2 £m			Level 3 £m
2016
Derivatives in designated hedge relationships
Derivative assets		–		20.0			–
Derivative liabilities		–		(3.0	)		–
Held for trading
Derivative assets		–		3.0			–
Derivative liabilities		–		(2.9	)		–
Payments due to vendors (earnout agreements)  (note 19)		–		–			(976.5	)
Liabilities in respect of put options		–		–			(297.0	)
Available for sale
Other investments		429.3		–			881.0

Reconciliation of level 3 fair value measurements¹:

	Liabilities in respect of put options £m			Other investments £m
1 January 2016		(234.4	)		847.3
Losses recognised in the income statement		(17.2	)		(1.6	)
Losses recognised in other comprehensive income		–			(105.6	)
Exchange adjustments		(47.4	)		112.9
Additions		(42.9	)		105.7
Disposals		–			(3.4	)
Reclassifications from other investments to interests in associates		–			(74.3	)
Settlements		44.9			–
31 December 2016		(297.0	)		881.0
Gains/(losses) recognised in the income statement		52.5			(13.8	)
Gains recognised in other comprehensive income		–			15.1
Exchange adjustments		7.5			(70.9	)
Additions		(40.5	)		67.7
Disposals		–			(1.7	)
Cancellations		2.9			–
Reclassifications from other investments to interests in associates		–			(57.1	)
Settlements		16.5			–
31 December 2017		(258.1	)		820.3

Note

¹  The reconciliation of payments due to vendors (earnout agreements) is presented in note 19.

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Authorised and issued share capital (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Authorised and Issued Share Capital

	Equity ordinary shares		Nominal value £m
Authorised
At 1 January 2015		1,750,000,000		175.0
At 31 December 2015		1,750,000,000		175.0
At 31 December 2016		1,750,000,000		175.0
At 31 December 2017		1,750,000,000		175.0
Issued and fully paid
At 1 January 2015		1,325,747,724		132.6
Exercise of share options		3,618,300		0.3
At 31 December 2015		1,329,366,024		132.9
Exercise of share options		2,514,706		0.3
At 31 December 2016		1,331,880,730		133.2
Exercise of share options		630,822		0.1
At 31 December 2017		1,332,511,552		133.3

Movements and Weighted-average Exercise Price for Options Granted

Movements on options granted (represented in ordinary shares)

	1 January 2017		Granted		Exercised			Lapsed			Outstanding 31 December 2017		Exercisable 31 December 2017
WPP		8,851		–		(2,110	)		–			6,741		6,741
WWOP		7,809,917		–		(620,387	)		(813,780	)		6,375,750		6,370,625
WSOP		10,273,450		5,960,775		(8,325	)		(1,622,950	)		14,602,950		–
		18,092,218		5,960,775		(630,822	)		(2,436,730	)		20,985,441		6,377,366

Weighted-average exercise price for options over

	1 January 2017		Granted		Exercised		Lapsed		Outstanding 31 December 2017		Exercisable 31 December 2017
Ordinary shares (£)
WPP		9.355		–		–		–		9.355		9.355
WWOP		12.059		–		10.428		12.592		12.195		12.194
WSOP		16.192		13.085		–		16.244		14.929		–
ADRs ($)
WPP		59.170		–		59.170		–		–		–
WWOP		93.131		–		57.808		98.281		94.752		94.752
WSOP		109.998		88.260		–		109.612		101.047		–

Range of Exercise Prices of Options

Options over ordinary shares

Outstanding

Range of exercise prices £	Weighted average exercise price £	Weighted average contractual life Months
4.819 – 17.055	14.169	99

Options over ADRs

Outstanding

Range of exercise prices $	Weighted average exercise price $	Weighted average contractual life Months
44.560 – 115.940	98.860	96

Weighted Average Fair Value of Options Granted and Weighted Average Assumptions

The weighted average fair value of options granted in the year calculated using the Black-Scholes model was as follows:

	2017		2016		2015
Fair value of UK options (shares)		112.0p		135.0p		144.0p
Fair value of US options (ADRs)		$9.40		$9.94		$11.34
Weighted average assumptions:
UK Risk-free interest rate		0.57%		0.44%		1.04%
US Risk-free interest rate		2.05%		1.60%		1.45%
Expected life (months)		48		48		48
Expected volatility		17%		16%		17%
Dividend yield		2.9%		2.8%		2.8%

WPP Executive Share Option Scheme [member]

Options Granted

As at 31 December 2017, unexercised options over ordinary shares of 6,741 have been granted under the WPP Executive Share Option Scheme as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
3,696		8.333		2015 - 2022
3,045		10.595		2016 - 2023

WPP Worldwide Share Ownership Program [member]

Options Granted

As at 31 December 2017, unexercised options over ordinary shares of 3,603,430 and unexercised options over ADRs of 554,464 have been granted under the WPP Worldwide Share Ownership Program as follows:

Number of ordinary shares under option	Exercise price per share (£)		Exercise dates
2,125		4.819		2011 - 2018
35,550		5.483		2012 - 2019
20,500		5.483		2013 - 2019
1,125		5.608		2012 - 2019
500		5.917		2011 - 2018
15,275		6.028		2011 - 2018
6,125		6.268		2014 - 2018
116,525		6.268		2014 - 2021
48,250		6.268		2015 - 2021
74,500		7.113		2013 - 2020
32,500		7.113		2014 - 2020
3,000		7.543		2014 - 2020
272,579		8.458		2015 - 2022
67,625		13.145		2017 - 2021
2,178,454		13.145		2017 - 2024
5,125		13.145		2018 - 2024
703,172		13.505		2016 - 2023
20,500		13.505		2017 - 2023

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
14,850		44.560		2012 - 2019
34,705		49.230		2014 - 2021
22,840		56.560		2013 - 2020
6,550		59.500		2011 - 2018
53,719		67.490		2015 - 2022
229,842		102.670		2017 - 2024
191,958		110.760		2016 - 2023

WPP Share Option Plan 2015 [Member]

Options Granted

As at 31 December 2017, unexercised options over ordinary shares of 9,394,600 and unexercised options over ADRs of 1,041,670 have been granted under the WPP Share Option Plan 2015 as follows:

Number of ordinary shares under option	Exercise price per share (£ )		Exercise dates
20,500		13.085		2020 - 2024
3,767,125		13.085		2020 - 2027
93,250		15.150		2018 - 2022
2,489,900		15.150		2018 - 2025
6,500		15.150		2019 - 2025
17,250		17.055		2019 - 2023
3,000,075		17.055		2019 - 2026

Number of ADRs under option	Exercise price per ADR ($)		Exercise dates
430,760		88.260		2020 - 2027
343,560		105.490		2020 - 2026
267,350		115.940		2018 - 2025

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Other reserves (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Other Reserves

	Capital redemption reserve £m		Equity reserve £m			Revaluation reserve £m			Translation reserve £m			Total other reserves £m
1 January 2015		2.7		(246.2	)		158.4			121.3			36.2
Exchange adjustments on foreign currency net investments		–		–			–			(272.9	)		(272.9	)
Gain on revaluation of available for sale investments		–		–			206.0			–			206.0
Recognition and remeasurement of financial instruments		–		(59.0	)		–			–			(59.0	)
Share purchases – close period commitments		–		80.0			–			–			80.0
31 December 2015		2.7		(225.2	)		364.4			(151.6	)		(9.7	)
Exchange adjustments on foreign currency net investments		–		–			–			1,309.9			1,309.9
Loss on revaluation of available for sale investments		–		–			(93.1	)		–			(93.1	)
Recognition and remeasurement of financial instruments		–		(21.9	)		–			–			(21.9	)
31 December 2016		2.7		(247.1	)		271.3			1,158.3			1,185.2
Exchange adjustments on foreign currency net investments		–		–			–			(445.5	)		(445.5	)
Gain on revaluation of available for sale investments		–		–			32.1			–			32.1
Recognition and remeasurement of financial instruments		–		(10.1	)		–			–			(10.1	)
31 December 2017		2.7		(257.2	)		303.4			712.8			761.7

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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Book Values of Identifiable Assets and Liabilities Acquired and Their Fair Value

Acquisitions in 2017

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		0.8			79.0			79.8
Property, plant and equipment		5.5			–			5.5
Cash		28.9			–			28.9
Trade receivables due within one year		74.4			–			74.4
Other current assets		20.1			–			20.1
Total assets		129.7			79.0			208.7
Current liabilities		(76.0	)		–			(76.0	)
Trade and other payables due after one year		(10.2	)		(20.5	)		(30.7	)
Deferred tax liabilities		–			(16.8	)		(16.8	)
Provisions		(0.1	)		(4.8	)		(4.9	)
Total liabilities		(86.3	)		(42.1	)		(128.4	)
Net assets		43.4			36.9			80.3
Non-controlling interests								(13.9	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(5.7	)
Goodwill								314.3
Consideration								375.0
Consideration satisfied by:
Cash								213.7
Payments due to vendors								161.3

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £63.9 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material. There were no material acquisitions completed between 31 December 2017 and the date the financial statements have been authorised for issue.

Acquisitions in 2016

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		10.5			319.1			329.6
Property, plant and equipment		20.6			–			20.6
Cash		57.1			–			57.1
Trade receivables due within one year		249.5			–			249.5
Other current assets		78.0			–			78.0
Total assets		415.7			319.1			734.8
Current liabilities		(299.4	)		(2.8	)		(302.2	)
Trade and other payables due after one year		(40.4	)		(59.5	)		(99.9	)
Deferred tax liabilities		–			(96.1	)		(96.1	)
Provisions		(0.1	)		(11.5	)		(11.6	)
Bank loans		(144.4	)		–			(144.4	)
Total liabilities		(484.3	)		(169.9	)		(654.2	)
Net assets		(68.6	)		149.2			80.6
Non-controlling interests								(15.0	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(98.5	)
Goodwill								799.3
Consideration								766.4
Consideration satisfied by:
Cash								423.3
Payments due to vendors								343.1

Goodwill arising from acquisitions represents the value of synergies with our existing portfolio of businesses and skilled staff to deliver services to our clients. Goodwill that is expected to be deductible for tax purposes is £54.8 million.

Non-controlling interests in acquired companies are measured at the non-controlling interests’ proportionate share of the acquiree’s identifiable net assets.

The contribution to revenue and operating profit of acquisitions completed in the year was not material.

Acquisitions in 2015

The Group acquired a number of subsidiaries in the year. The following table sets out the book values of the identifiable assets and liabilities acquired and their fair value to the Group. The fair value adjustments for certain acquisitions have been determined provisionally at the balance sheet date.

	Book value at acquisition £m			Fair value adjustments £m			Fair value to Group £m
Intangible assets		2.4			230.7			233.1
Property, plant and equipment		21.1			–			21.1
Cash		57.7			–			57.7
Trade receivables due within one year		115.4			–			115.4
Other current assets		75.1			–			75.1
Total assets		271.7			230.7			502.4
Current liabilities		(207.9	)		–			(207.9	)
Trade and other payables due after one year		(16.8	)		(49.5	)		(66.3	)
Deferred tax liabilities		–			(70.3	)		(70.3	)
Provisions		(3.3	)		(7.7	)		(11.0	)
Total liabilities		(228.0	)		(127.5	)		(355.5	)
Net assets		43.7			103.2			146.9
Non-controlling interests								(47.2	)
Fair value of equity stake in associate undertakings before acquisition of controlling interest								(208.6	)
Goodwill								778.9
Consideration								670.0
Consideration satisfied by:
Cash								411.6
Payments due to vendors								258.4

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Principal subsidiary undertakings (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Principal Subsidiary Undertakings

The principal subsidiary undertakings of the Group are:

	Country of incorporation
Grey Global Group LLC	US
J. Walter Thompson Company LLC	US
GroupM Worldwide LLC	US
The Ogilvy Group LLC	US
Young & Rubicam LLC	US
TNS Group Holdings Ltd	UK

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Reconciliation of profit before interest and taxation to headline PBIT (Tables)

12 Months Ended

Dec. 31, 2017

Text block1 [abstract]

Summary of Reconciliation of Profit Before Interest and Taxation to Headline PBIT

Reconciliation of profit before interest and taxation to headline PBIT:

	2017 £m			2016 £m			2015 £m
Profit before interest and taxation		2,021.7			2,112.9			1,679.0
Amortisation and impairment of acquired intangible assets		195.1			168.4			140.1
Goodwill impairment		27.1			27.0			15.1
Gains on disposal of investments and subsidiaries	(129.0)			(44.3)			(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership		0.3			(232.4	)		(165.0	)
Investment write-downs		95.9			86.1			78.7
Restructuring costs		56.8			27.4			106.2
IT asset write-downs		–			–			29.1
Share of exceptional (gains)/losses of associates		(0.8	)		15.2			21.8
Headline PBIT		2,267.1			2,160.3			1,774.0

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Condensed consolidating financial information for bonds issued (Tables)

12 Months Ended

Dec. 31, 2017

Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]

Condensed Consolidating Income Statement

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed Consolidating Statement of Comprehensive Income

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

Condensed Consolidating Cash Flow Statement

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,636.8	)		(27.4	)		6,290.1			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,623.7	)		(15.1	)		4,766.4			—		1,902.6

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.3			(3.3	)		(63.8	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,794.0	)		(58.6	)		5,082.8			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,468.9	)		(67.5	)		5,409.5			—		1,946.6

C

Condensed Consolidating Balance Sheet

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,921.2			—			—			(42,565.2	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			28,141.0			2,079.9			28,677.4			(55,036.3	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.6			(6,169.5	)		—
Cash and short-term deposits		—			235.0			—			6,683.5			(4,527.1	)		2,391.4
		1,661.7			2,406.1			65.8			21,725.7			(10,696.6	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,240.0	)		—			(121.2	)		6,169.5			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,225.7	)		(47.0	)		(15,485.5	)		10,696.6			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,819.6	)		18.8			6,240.2			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,917.6			(55,036.3	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,909.6			(42,565.2	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,378.4			(42,565.2	)		9,962.0

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			24,162.9			—			—			(37,518.9	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,408.9			2,283.8			26,737.5			(47,660.9	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			151.8			—			5,300.5			(3,029.1	)		2,436.9
		1,653.9			2,219.9			46.0			20,568.2			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(3,141.1	)		—			(215.6	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,986.1	)		(36.4	)		(16,465.7	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,766.2	)		9.6			4,102.5			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,840.0			(47,660.9	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			24,152.4			(37,518.9	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,595.5			(37,518.9	)		9,767.6

Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member]

Condensed Consolidating Income Statement

Condensed consolidating income statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			15,265.4			—			15,265.4
Costs of services		—			—			—			(12,090.2	)		—			(12,090.2	)
Gross profit		—			—			—			3,175.2			—			3,175.2
General and administrative costs		14.1			74.7			—			(1,355.8	)		—			(1,267.0	)
Operating profit		14.1			74.7			—			1,819.4			—			1,908.2
Share of results of subsidiaries		1,901.2			2,016.5			—			—			(3,917.7	)		—
Share of results of associates		—			—			—			113.5			—			113.5
Profit before interest and taxation		1,915.3			2,091.2			—			1,932.9			(3,917.7	)		2,021.7
Finance income		—			24.5			110.6			262.8			(302.7	)		95.2
Finance costs		(99.3	)		(221.5	)		(103.4	)		(148.3	)		302.7			(269.8	)
Revaluation of financial instruments		0.6			—			(5.4	)		267.0			—			262.2
Profit before taxation		1,816.6			1,894.2			1.8			2,314.4			(3,917.7	)		2,109.3
Taxation		—			7.0			—			(204.0	)		—			(197.0	)
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Attributable to:
Equity holders of the parent		1,816.6			1,901.2			1.8			2,014.7			(3,917.7	)		1,816.6
Non-controlling interests		—			—			—			95.7			—			95.7
		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3

For the year ended 31 December 2016, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			14,388.9			—			14,388.9
Costs of services		—			—			—			(11,348.1	)		—			(11,348.1	)
Gross profit		—			—			—			3,040.8			—			3,040.8
General and administrative costs		13.8			(828.2	)		(0.1	)		(163.2	)		—			(977.7	)
Operating profit/(loss)		13.8			(828.2	)		(0.1	)		2,877.6			—			2,063.1
Share of results of subsidiaries		1,497.4			2,518.2			—			—			(4,015.6	)		—
Share of results of associates		—			—			—			49.8			—			49.8
Profit/(loss) before interest and taxation		1,511.2			1,690.0			(0.1	)		2,927.4			(4,015.6	)		2,112.9
Finance income		—			28.8			121.1			231.9			(301.4	)		80.4
Finance costs		(102.5	)		(222.1	)		(98.8	)		(132.5	)		301.4			(254.5	)
Revaluation of financial instruments		(8.6	)		—			7.0			(46.7	)		—			(48.3	)
Profit before taxation		1,400.1			1,496.7			29.2			2,980.1			(4,015.6	)		1,890.5
Taxation		—			0.7			—			(389.6	)		—			(388.9	)
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Attributable to:
Equity holders of the parent		1,400.1			1,497.4			29.2			2,489.0			(4,015.6	)		1,400.1
Non-controlling interests		—			—			—			101.5			—			101.5
		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6

Notes

¹  Prior year figures have been re-presented as described in the accounting policies.

Condensed consolidating income statement (continued)

For the year ended 31 December 2015, £m¹

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Revenue		—			—			—			12,235.2			—			12,235.2
Costs of services		—			—			—			(9,709.1	)		—			(9,709.1	)
Gross profit		—			—			—			2,526.1			—			2,526.1
General and administrative costs		10.6			(83.0	)		(0.1	)		(821.6	)		—			(894.1	)
Operating profit/(loss)		10.6			(83.0	)		(0.1	)		1,704.5			—			1,632.0
Share of results of subsidiaries		1,298.5			1,507.3			—			—			(2,805.8	)		—
Share of results of associates		—			—			—			47.0			—			47.0
Profit/(loss) before interest and taxation		1,309.1			1,424.3			(0.1	)		1,751.5			(2,805.8	)		1,679.0
Finance income		1.2			32.0			88.4			166.0			(215.2	)		72.4
Finance costs		(146.1	)		(161.6	)		(87.4	)		(44.2	)		215.2			(224.1	)
Revaluation of financial instruments		(4.0	)		—			—			(30.7	)		—			(34.7	)
Profit before taxation		1,160.2			1,294.7			0.9			1,842.6			(2,805.8	)		1,492.6
Taxation		—			3.8			—			(251.3	)		—			(247.5	)
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Attributable to:
Equity holders of the parent		1,160.2			1,298.5			0.9			1,506.4			(2,805.8	)		1,160.2
Non-controlling interests		—			—			—			84.9			—			84.9
		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1

Notes

¹ Prior year figures have been re-presented as described in the accounting policies.

Condensed Consolidating Statement of Comprehensive Income

Condensed consolidating statement of comprehensive income

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,816.6			1,901.2			1.8			2,110.4			(3,917.7	)		1,912.3
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(445.5	)		(445.5	)		(0.6	)		(464.6	)		891.0			(465.2	)
Gain on revaluation of available for sale investments		32.1			32.1			—			32.1			(64.2	)		32.1
		(413.4	)		(413.4	)		(0.6	)		(432.5	)		826.8			(433.1	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		17.0			17.0			—			17.0			(34.0	)		17.0
Deferred tax on defined benefit pension plans		(24.6	)		(24.6	)		—			(24.6	)		49.2			(24.6	)
		(7.6	)		(7.6	)		—			(7.6	)		15.2			(7.6	)
Other comprehensive loss for the year		(421.0	)		(421.0	)		(0.6	)		(440.1	)		842.0			(440.7	)
Total comprehensive income for the year		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6
Attributable to:
Equity holders of the parent		1,395.6			1,480.2			1.2			1,594.3			(3,075.7	)		1,395.6
Non-controlling interests		—			—			—			76.0			—			76.0
		1,395.6			1,480.2			1.2			1,670.3			(3,075.7	)		1,471.6

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,400.1			1,497.4			29.2			2,590.5			(4,015.6	)		1,501.6
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		1,309.9			1,309.9			(1.2	)		1,379.2			(2,619.8	)		1,378.0
Loss on revaluation of available for sale investments		(93.1	)		(93.1	)		—			(93.1	)		186.2			(93.1	)
		1,216.8			1,216.8			(1.2	)		1,286.1			(2,433.6	)		1,284.9
Items that will not be reclassified subsequently to profit or loss:
Actuarial loss on defined benefit pension plans		(15.9	)		(15.9	)		—			(15.9	)		31.8			(15.9	)
Deferred tax on defined benefit pension plans		(0.4	)		(0.4	)		—			(0.4	)		0.8			(0.4	)
		(16.3	)		(16.3	)		—			(16.3	)		32.6			(16.3	)
Other comprehensive income/(loss) for the year		1,200.5			1,200.5			(1.2	)		1,269.8			(2,401.0	)		1,268.6
Total comprehensive income for the year		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2
Attributable to:
Equity holders of the parent		2,600.6			2,697.9			28.0			3,690.7			(6,416.6	)		2,600.6
Non-controlling interests		—			—			—			169.6			—			169.6
		2,600.6			2,697.9			28.0			3,860.3			(6,416.6	)		2,770.2

Condensed consolidating statement of comprehensive income (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications / Eliminations			Consolidated WPP plc
Profit for the year		1,160.2			1,298.5			0.9			1,591.3			(2,805.8	)		1,245.1
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments		(272.9	)		(272.9	)		(0.9	)		(275.0	)		545.8			(275.9	)
Gain on revaluation of available for sale investments		206.0			206.0			—			206.0			(412.0	)		206.0
		(66.9	)		(66.9	)		(0.9	)		(69.0	)		133.8			(69.9	)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain on defined benefit pension plans		33.5			33.5			—			33.5			(67.0	)		33.5
Deferred tax on defined benefit pension plans		(5.2	)		(5.2	)		—			(5.2	)		10.4			(5.2	)
		28.3			28.3			—			28.3			(56.6	)		28.3
Other comprehensive loss for the year		(38.6	)		(38.6	)		(0.9	)		(40.7	)		77.2			(41.6	)
Total comprehensive income for the year		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5
Attributable to:
Equity holders of the parent		1,121.6			1,259.9			—			1,468.7			(2,728.6	)		1,121.6
Non-controlling interests		—			—			—			81.9			—			81.9
		1,121.6			1,259.9			—			1,550.6			(2,728.6	)		1,203.5

Condensed Consolidating Cash Flow Statement

Condensed consolidating cash flow statement

For the year ended 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		32.9			(49.7	)		(13.6	)		1,438.5			—		1,408.1
Investing activities
Acquisitions and disposals		—			—			—			(181.5	)		—		(181.5	)
Purchases of property, plant and equipment		—			(10.4	)		—			(278.5	)		—		(288.9	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(37.3	)		—		(37.3	)
Proceeds on disposal of property, plant and equipment		—			—			—			8.0			—		8.0
Net cash outflow from investing activities		—			(10.4	)		—			(489.3	)		—		(499.7	)
Financing activities
Share option proceeds		6.4			—			—			—			—		6.4
Cash consideration for non-controlling interests		—			(1.4	)		—			(45.9	)		—		(47.3	)
Share repurchases and buy-backs		(289.6	)		—			—			(214.6	)		—		(504.2	)
Net increase/(decrease) in borrowings		(400.0	)		—			—			999.6			—		599.6
Financing and share issue costs		—			—			—			(0.8	)		—		(0.8	)
Equity dividends paid		(751.5	)		—			—			—			—		(751.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(87.8	)		—		(87.8	)
Net cash (outflow)/inflow from financing activities		(1,434.7	)		(1.4	)		—			650.5			—		(785.6	)
Net increase/(decrease) in cash and cash equivalents		(1,401.8	)		(61.5	)		(13.6	)		1,599.7			—		122.8
Translation of cash and cash equivalents		(0.9	)		48.4			1.3			(76.0	)		—		(27.2	)
Cash and cash equivalents at beginning of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6
Cash and cash equivalents at end of year		(2,627.7	)		(1,640.6	)		(27.4	)		6,293.9			—		1,998.2

For the year ended 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		963.1			1,002.2			65.5			(257.0	)		—		1,773.8
Investing activities
Acquisitions and disposals		—			—			—			(638.8	)		—		(638.8	)
Purchases of property, plant and equipment		—			(1.1	)		—			(251.0	)		—		(252.1	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(33.0	)		—		(33.0	)
Proceeds on disposal of property, plant and equipment		—			—			—			7.7			—		7.7
Net cash outflow from investing activities		—			(1.1	)		—			(915.1	)		—		(916.2	)
Financing activities
Share option proceeds		27.2			—			—			—			—		27.2
Cash consideration for non-controlling interests		—			(1.3	)		—			(57.0	)		—		(58.3	)
Share repurchases and buy-backs		(274.5	)		—			—			(152.9	)		—		(427.4	)
Net (decrease)/increase in borrowings		(392.1	)		—			—			369.6			—		(22.5	)
Financing and share issue costs		—			—			—			(6.4	)		—		(6.4	)
Equity dividends paid		(616.5	)		—			—			—			—		(616.5	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(89.6	)		—		(89.6	)
Net cash (outflow)/inflow from financing activities		(1,255.9	)		(1.3	)		—			63.7			—		(1,193.5	)
Net (decrease)/increase in cash and cash equivalents		(292.8	)		999.8			65.5			(1,108.4	)		—		(335.9	)
Translation of cash and cash equivalents		(5.7	)		(154.6	)		(13.1	)		465.3			—		291.9
Cash and cash equivalents at beginning of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6
Cash and cash equivalents at end of year		(1,225.0	)		(1,627.5	)		(15.1	)		4,770.2			—		1,902.6

Condensed consolidating cash flow statement (continued)

For the year ended 31 December 2015, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations		Consolidated WPP plc
Net cash inflow/(outflow) from operating activities		983.6			(658.3	)		(5.6	)		1,040.2			—		1,359.9
Investing activities
Acquisitions and disposals		—			(16.9	)		—			(652.6	)		—		(669.5	)
Purchases of property, plant and equipment		—			(2.0	)		—			(208.3	)		—		(210.3	)
Purchases of other intangible assets (including capitalised computer software)		—			—			—			(36.1	)		—		(36.1	)
Proceeds on disposal of property, plant and equipment		—			—			—			13.4			—		13.4
Net cash outflow from investing activities		—			(18.9	)		—			(883.6	)		—		(902.5	)
Financing activities
Share option proceeds		27.6			—			—			—			—		27.6
Cash consideration for non-controlling interests		—			—			—			(23.6	)		—		(23.6	)
Share repurchases and buy-backs		(406.0	)		—			—			(181.6	)		—		(587.6	)
Net increase/(decrease) in borrowings		(13.7	)		—			—			505.7			—		492.0
Financing and share issue costs		—			—			—			(11.4	)		—		(11.4	)
Equity dividends paid		(545.8	)		—			—			—			—		(545.8	)
Dividends paid to non-controlling interests in subsidiary undertakings		—			—			—			(55.2	)		—		(55.2	)
Net cash (outflow)/inflow from financing activities		(937.9	)		—			—			233.9			—		(704.0	)
Net (decrease)/increase in cash and cash equivalents		45.7			(677.2	)		(5.6	)		390.5			—		(246.6	)
Translation of cash and cash equivalents		10.4			2.2			(3.3	)		(63.7	)		—		(54.4	)
Cash and cash equivalents at beginning of year		(982.6	)		(1,797.7	)		(58.6	)		5,086.5			—		2,247.6
Cash and cash equivalents at end of year		(926.5	)		(2,472.7	)		(67.5	)		5,413.3			—		1,946.6

Condensed Consolidating Balance Sheet

Condensed consolidating balance sheet

At 31 December 2017, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			12,952.9			—			12,952.9
Other		—			—			—			2,018.4			—			2,018.4
Property, plant and equipment		—			16.5			—			963.0			—			979.5
Investment in subsidiaries		14,644.0			27,752.6			—			—			(42,396.6	)		—
Interests in associates and joint ventures		—			—			—			1,065.2			—			1,065.2
Other investments		—			—			—			1,153.5			—			1,153.5
Deferred tax assets		—			—			—			160.3			—			160.3
Trade and other receivables		—			—			1.6			174.6			—			176.2
Intercompany receivables		—			203.3			2,078.3			10,189.5			(12,471.1	)		—
		14,644.0			27,972.4			2,079.9			28,677.4			(54,867.7	)		18,506.0
Current assets
Inventory and work in progress		—			—			—			424.3			—			424.3
Corporate income tax recoverable		—			—			—			234.7			—			234.7
Trade and other receivables		0.3			457.3			0.1			11,654.6			—			12,112.3
Intercompany receivables		1,661.4			1,713.8			65.7			2,728.5			(6,169.4	)		—
Cash and short-term deposits		—			231.2			—			6,687.3			(4,527.1	)		2,391.4
		1,661.7			2,402.3			65.8			21,729.4			(10,696.5	)		15,162.7
Current liabilities
Trade and other payables		(16.9	)		(113.9	)		(19.6	)		(14,090.7	)		—			(14,241.1	)
Intercompany payables		(2,808.3	)		(3,067.6	)		—			(293.5	)		6,169.4			—
Corporate income tax payable		—			—			—			(649.3	)		—			(649.3	)
Bank overdrafts, bonds and bank loans		(2,627.7	)		(1,871.8	)		(27.4	)		(624.3	)		4,527.1			(624.1	)
		(5,452.9	)		(5,053.3	)		(47.0	)		(15,657.8	)		10,696.5			(15,514.5	)
Net current (liabilities)/assets		(3,791.2	)		(2,651.0	)		18.8			6,071.6			—			(351.8	)
Total assets less current liabilities		10,852.8			25,321.4			2,098.7			34,749.0			(54,867.7	)		18,154.2
Non-current liabilities
Bonds and bank loans		—			—			(2,087.1	)		(4,163.3	)		—			(6,250.4	)
Trade and other payables		—			—			—			(992.8	)		—			(992.8	)
Intercompany payables		(1,359.6	)		(10,677.4	)		—			(434.1	)		12,471.1			—
Deferred tax liabilities		—			—			—			(513.7	)		—			(513.7	)
Provision for post-employment benefits		—			—			—			(206.3	)		—			(206.3	)
Provisions for liabilities and charges		—			—			—			(229.0	)		—			(229.0	)
		(1,359.6	)		(10,677.4	)		(2,087.1	)		(6,539.2	)		12,471.1			(8,192.2	)
Net assets		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0
Attributable to:
Equity share owners’ funds		9,493.2			14,644.0			11.6			27,741.0			(42,396.6	)		9,493.2
Non-controlling interests		—			—			—			468.8			—			468.8
Total equity		9,493.2			14,644.0			11.6			28,209.8			(42,396.6	)		9,962.0

Condensed consolidating balance sheet (continued)

At 31 December 2016, £m

	WPP plc			Subsidiary Guarantors			WPP Finance 2010			Other Subsidiaries			Reclassifications/ Eliminations			Consolidated WPP plc
Non-current assets
Intangible assets:
Goodwill		—			—			—			13,214.3			—			13,214.3
Other		—			—			—			2,217.3			—			2,217.3
Property, plant and equipment		—			7.1			—			961.6			—			968.7
Investment in subsidiaries		13,356.0			23,994.3			—			—			(37,350.3	)		—
Interests in associates and joint ventures		—			—			—			1,069.4			—			1,069.4
Other investments		—			—			—			1,310.3			—			1,310.3
Deferred tax assets		—			—			—			140.4			—			140.4
Trade and other receivables		—			—			7.0			197.9			—			204.9
Intercompany receivables		—			238.9			2,276.8			7,626.3			(10,142.0	)		—
		13,356.0			24,240.3			2,283.8			26,737.5			(47,492.3	)		19,125.3
Current assets
Inventory and work in progress		—			—			—			400.4			—			400.4
Corporate income tax recoverable		—			—			—			231.2			—			231.2
Trade and other receivables		11.5			377.9			0.1			11,985.0			—			12,374.5
Intercompany receivables		1,628.7			1,690.2			45.9			2,651.1			(6,015.9	)		—
Cash and short-term deposits		13.7			148.0			—			5,304.3			(3,029.1	)		2,436.9
		1,653.9			2,216.1			46.0			20,572.0			(9,045.0	)		15,443.0
Current liabilities
Trade and other payables		(21.0	)		(69.5	)		(21.3	)		(14,898.6	)		—			(15,010.4	)
Intercompany payables		(2,659.2	)		(2,968.7	)		—			(388.0	)		6,015.9			—
Corporate income tax payable		—			—			—			(752.3	)		—			(752.3	)
Bank overdrafts, bonds and bank loans		(1,641.8	)		(1,775.5	)		(15.1	)		(599.2	)		3,029.1			(1,002.5	)
		(4,322.0	)		(4,813.7	)		(36.4	)		(16,638.1	)		9,045.0			(16,765.2	)
Net current (liabilities)/assets		(2,668.1	)		(2,597.6	)		9.6			3,933.9			—			(1,322.2	)
Total assets less current liabilities		10,687.9			21,642.7			2,293.4			30,671.4			(47,492.3	)		17,803.1
Non-current liabilities
Bonds and bank loans		—			—			(2,282.9	)		(3,282.0	)		—			(5,564.9	)
Trade and other payables		—			—			—			(1,273.8	)		—			(1,273.8	)
Intercompany payables		(1,363.4	)		(8,286.7	)		—			(491.9	)		10,142.0			—
Deferred tax liabilities		—			—			—			(692.4	)		—			(692.4	)
Provision for post-employment benefits		—			—			—			(276.5	)		—			(276.5	)
Provisions for liabilities and charges		—			—			—			(227.9	)		—			(227.9	)
		(1,363.4	)		(8,286.7	)		(2,282.9	)		(6,244.5	)		10,142.0			(8,035.5	)
Net assets		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6
Attributable to:
Equity share owners’ funds		9,324.5			13,356.0			10.5			23,983.8			(37,350.3	)		9,324.5
Non-controlling interests		—			—			—			443.1			—			443.1
Total equity		9,324.5			13,356.0			10.5			24,426.9			(37,350.3	)		9,767.6

XML

Accounting Policies - Summary of Estimated Useful Life of Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2017
Bottom of range [member] | Brand names [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	10 years
Bottom of range [member] | Customer-related intangibles [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	3 years
Bottom of range [member] | Other proprietary tools [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	3 years
Bottom of range [member] | Other [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	3 years
Top of range [member] | Brand names [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	20 years
Top of range [member] | Customer-related intangibles [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	10 years
Top of range [member] | Other proprietary tools [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	10 years
Top of range [member] | Other [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets, estimated useful life	5 years

XML

Accounting Policies - Summary of Estimated Useful Life of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2017
Freehold buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	50 years
Leasehold land and buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	Over the term of the lease or life of the asset, if shorter.
Bottom of range [member] | Fixtures, fittings and equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	3 years
Bottom of range [member] | Computer equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	3 years
Top of range [member] | Fixtures, fittings and equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	10 years
Top of range [member] | Computer equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, estimated useful life	5 years

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Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Increase (decrease) due to adoption of IFRS 15 [member]
Disclosure of accounting policies [line items]
Increase in third-party costs	$ 500

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Segment information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 Segments
Disclosure of operating segments [abstract]
Number of reportable segments	4

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Segment information - Contributions by Reportable Segments (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of operating segments [line items]
Revenue	£ 15,265.4	£ 14,388.9	[1]	£ 12,235.2	[1]
Headline PBIT	2,267.1	2,160.3		1,774.0
Share-based payments	105.0	106.5		99.0
Capital additions	326.2	285.1		246.4
Depreciation and amortization	267.0	259.4		228.4
Goodwill impairment	27.1	27.0		15.1
Share of results of associates	113.5	49.8	[1]	47.0	[1]
Interests in associates and joint ventures	1,065.2	1,069.4		758.6
Advertising and media investment management [member]
Disclosure of operating segments [line items]
Revenue	7,180.3	6,547.3		5,552.8
Revenue less pass-through costs	5,851.9	5,413.5		4,652.0
Headline PBIT	£ 1,109.0	£ 1,027.2		£ 859.7
Revenue less pass-through costs margin	19.00%	19.00%		18.50%
Share-based payments	£ 57.0	£ 60.7		£ 55.4
Capital additions	171.3	126.2		119.7
Depreciation and amortization	108.8	105.4		96.9
Goodwill impairment	19.5	20.9		15.1
Share of results of associates	27.0	8.3		26.8
Interests in associates and joint ventures	193.1	285.6		377.0
Data investment management [member]
Disclosure of operating segments [line items]
Revenue	2,690.9	2,661.1		2,425.9
Revenue less pass-through costs	2,052.3	1,994.0		1,768.1
Headline PBIT	£ 350.3	£ 351.5		£ 286.1
Revenue less pass-through costs margin	17.10%	17.60%		16.20%
Share-based payments	£ 14.4	£ 13.0		£ 13.7
Capital additions	58.8	61.5		58.1
Depreciation and amortization	59.9	60.9		51.8
Share of results of associates	15.3	13.2		0.8
Interests in associates and joint ventures	106.3	109.4		86.4
Public relations & public affairs [member]
Disclosure of operating segments [line items]
Revenue	1,171.9	1,101.3		945.8
Revenue less pass-through costs	1,140.9	1,078.8		929.7
Headline PBIT	£ 183.2	£ 179.8		£ 145.2
Revenue less pass-through costs margin	16.10%	16.70%		15.60%
Share-based payments	£ 8.6	£ 7.5		£ 6.7
Capital additions	10.6	10.3		9.1
Depreciation and amortization	12.2	11.6		9.8
Goodwill impairment	7.6
Share of results of associates	6.3	3.2		2.3
Interests in associates and joint ventures	34.2	108.1		92.0
Brand consulting, health & wellness and specialist communications [member]
Disclosure of operating segments [line items]
Revenue	4,222.3	4,079.2		3,310.7
Revenue less pass-through costs	4,094.5	3,911.5		3,174.5
Headline PBIT	£ 624.6	£ 601.8		£ 483.0
Revenue less pass-through costs margin	15.30%	15.40%		15.20%
Share-based payments	£ 25.0	£ 25.3		£ 23.2
Capital additions	85.5	87.1		59.5
Depreciation and amortization	86.1	81.5		69.9
Goodwill impairment		6.1
Share of results of associates	64.9	25.1		17.1
Interests in associates and joint ventures	£ 731.6	£ 566.3		£ 203.2

[1] Prior year figures have been re-presented as described in the accounting policies.

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Segment information - Contributions by Geographical Area (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of geographical areas [line items]
Revenue	£ 15,265.4	£ 14,388.9	[1]	£ 12,235.2	[1]
Headline PBIT	2,267.1	2,160.3		1,774.0
Non-current assets	18,343.6	18,976.6
North America [member]
Disclosure of geographical areas [line items]
Revenue	5,547.0	5,280.8		4,491.2
Revenue less pass-through costs	4,799.0	4,603.7		3,882.3
Headline PBIT	£ 937.4	£ 895.4		£ 728.2
Revenue less pass-through costs margin	19.50%	19.40%		18.80%
Non-current assets	£ 7,667.5	£ 8,189.3
United Kingdom [member]
Disclosure of geographical areas [line items]
Revenue	1,985.9	1,866.3		£ 1,777.4
Revenue less pass-through costs	1,683.5	1,587.6		1,504.5
Headline PBIT	£ 280.0	£ 261.4		£ 243.1
Revenue less pass-through costs margin	16.60%	16.50%		16.20%
Non-current assets	£ 2,098.2	£ 2,138.5
Western Continental Europe [member]
Disclosure of geographical areas [line items]
Revenue	3,160.0	2,943.2		£ 2,425.6
Revenue less pass-through costs	2,616.0	2,425.5		2,016.2
Headline PBIT	£ 376.0	£ 351.7		£ 277.2
Revenue less pass-through costs margin	14.40%	14.50%		13.70%
Non-current assets	£ 4,542.1	£ 4,321.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of geographical areas [line items]
Revenue	4,572.5	4,298.6		£ 3,541.0
Revenue less pass-through costs	4,041.1	3,781.0		3,121.3
Headline PBIT	£ 673.7	£ 651.8		£ 525.5
Revenue less pass-through costs margin	16.70%	17.20%		16.80%
Non-current assets	£ 4,035.8	£ 4,327.2
United States [member]
Disclosure of geographical areas [line items]
Revenue	5,241.3	5,005.8		£ 4,257.4
Revenue less pass-through costs	4,541.0	4,365.1		3,674.3
Headline PBIT	890.3	849.4		£ 697.3
Non-current assets	£ 7,202.7	£ 7,690.2

[1] Prior year figures have been re-presented as described in the accounting policies.

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Costs of services and general and administrative costs - Summary of Operating Costs (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure Of Information About Operating Cost [line items]
Costs of services	£ 12,090.2	£ 11,348.1	[1]	£ 9,709.1	[1]
General and administrative costs	1,267.0	977.7	[1]	894.1	[1]
Costs of services and general and administrative costs	13,357.2	12,325.8		10,603.2
Costs of services and general and administrative costs include:
Staff costs (note 5)	8,319.0	7,784.9		6,652.6
Establishment costs	888.6	836.5		726.3
Media pass-through costs	1,350.0	1,223.2		999.7
Data collection pass-through costs	633.7	661.0		647.2
Other costs of services and general and administrative costs	2,165.9	1,820.2		1,577.4
Costs of services and general and administrative costs	13,357.2	12,325.8		10,603.2
Other costs of services and general and administrative costs include:
Goodwill impairment (note 12)	27.1	27.0		15.1
Investment write-downs	95.9	86.1		78.7
Restructuring costs	56.8	27.4		106.2
IT asset write-downs				29.1
Amortisation and impairment of acquired intangible assets (note 12)	195.1	168.4		140.1
Amortisation of other intangible assets (note 12)	36.3	38.6		33.7
Depreciation of property, plant and equipment	230.7	215.2		190.0
Losses on sale of property, plant and equipment	1.1	0.8		1.1
Gains on disposal of investments and subsidiaries	(129.0)	(44.3)		(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership	0.3	(232.4)		(165.0)
Net foreign exchange losses/(gains)	12.9	(17.0)		(10.7)
Operating lease rentals:
Operating lease rentals, net of sublease income	580.6	555.1		483.6
Land and buildings [member]
Operating lease rentals:
Operating lease rentals	586.6	556.1		476.6
Sublease income	(17.9)	(11.6)		(11.3)
Operating lease rentals, net of sublease income	568.7	544.5		465.3
Plant and machinery [member]
Operating lease rentals:
Operating lease rentals	£ 11.9	£ 10.6		£ 18.3

[1] Prior year figures have been re-presented as described in the accounting policies.

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Costs of services and general and administrative costs - Summary of Operating Costs (Parenthetical) (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis of income and expense [abstract]
Other pass-through costs	£ 142.1	£ 106.9	£ 64.0

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Costs of services and general and administrative costs - Additional Information (Detail) - GBP (£)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Information About Operating Cost [line items]
Credits relating to the release of excess provisions and other balances	£ 44,800,000	£ 26,300,000	£ 31,600,000
Investment write-downs	95,900,000	86,100,000	78,700,000
Gains on disposal of investments and subsidiaries	129,000,000	44,300,000	131,000,000
Gains(losses) on remeasuresment of equity interests arising from a change in scope of ownership	(300,000)	232,400,000	165,000,000
Restructuring costs	56,800,000	27,400,000	106,200,000
Severance costs arising from a structural assessment of operations [member]
Disclosure Of Information About Operating Cost [line items]
Restructuring costs	12,800,000	27,400,000	36,700,000
IT services and infrastructure [member]
Disclosure Of Information About Operating Cost [line items]
Restructuring costs	33,700,000	£ 0	£ 69,500,000
comScore Inc. [member]
Disclosure Of Information About Operating Cost [line items]
Investment write-downs	53,100,000
Asatsu-DK Inc. [member]
Disclosure Of Information About Operating Cost [line items]
Gains on disposal of investments and subsidiaries	£ 92,300,000

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Costs of services and general and administrative costs - Auditors' Remuneration (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Information About Operating Cost [line items]
Auditors' remuneration for audit services	£ 22.1	£ 20.8	£ 17.7
Other services pursuant to legislation	4.0	3.7	3.3
Fees payable to the auditors pursuant to legislation	26.1	24.5	21.0
Auditors' remuneration for tax services	0.2	2.9	2.8
Total non-audit fees	4.8	8.7	9.5
Total fees	30.9	33.2	30.5
Advisory services [member]
Disclosure Of Information About Operating Cost [line items]
Auditors' remuneration for tax services	0.1	1.6	1.8
Compliance services [member]
Disclosure Of Information About Operating Cost [line items]
Auditors' remuneration for tax services	0.1	1.3	1.0
Corporate finance services [member]
Disclosure Of Information About Operating Cost [line items]
Other services pursuant to legislation		0.1	0.2
Other services [member]
Disclosure Of Information About Operating Cost [line items]
Other services pursuant to legislation	4.6	5.7	6.5
WPP plc [member]
Disclosure Of Information About Operating Cost [line items]
Auditors' remuneration for audit services	1.4	1.4	1.5
Subsidiaries [member]
Disclosure Of Information About Operating Cost [line items]
Auditors' remuneration for audit services	£ 20.7	£ 19.4	£ 16.2

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Costs of services and general and administrative costs - Minimum Committed Annual Rentals (Detail) - GBP (£) £ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		£ 3,893.9
Less sub-let rentals		(36.4)
Net payment		3,857.5
Within one year [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		548.6
Less sub-let rentals		(18.6)
Net payment		530.0
Between one and two years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		469.0
Less sub-let rentals		(6.5)
Net payment		462.5
Between two and three years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		412.9
Less sub-let rentals		(4.2)
Net payment		408.7
Between three and four years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		349.1
Less sub-let rentals		(2.4)
Net payment		346.7
Between four and five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		298.3
Less sub-let rentals		(2.1)
Net payment		296.2
Over five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		1,816.0
Less sub-let rentals		(2.6)
Net payment		1,813.4
Plant and machinery [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		14.5	£ 14.3
Plant and machinery [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	£ 16.0
Plant and machinery [member] | Within one year [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		4.0	4.3
Plant and machinery [member] | Within one year [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	5.1
Plant and machinery [member] | Later than two years and not later than five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		10.5	9.7
Plant and machinery [member] | Later than two years and not later than five years [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	10.8
Plant and machinery [member] | Over five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable			0.3
Plant and machinery [member] | Over five years [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	0.1
Land and buildings [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		560.0	461.0
Land and buildings [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	532.6
Land and buildings [member] | Within one year [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		85.1	57.6
Land and buildings [member] | Within one year [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	88.6
Land and buildings [member] | Later than two years and not later than five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		287.9	240.3
Land and buildings [member] | Later than two years and not later than five years [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	236.2
Land and buildings [member] | Over five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable		£ 187.0	£ 163.1
Land and buildings [member] | Over five years [member] | Entering into significant commitments or contingent liabilities [member]
Disclosure of finance lease and operating lease by lessee [line items]
Amounts payable	£ 207.8

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Share of results of associates - Summary of Share of Results of Associates (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of associates [abstract]
Share of profit before interest and taxation	£ 145.1	£ 97.1		£ 95.2
Share of exceptional gains/(losses)	0.8	(15.2)		(21.8)
Share of interest and non-controlling interests	(7.8)	(4.7)		(1.7)
Share of taxation	(24.6)	(27.4)		(24.7)
Share of profit loss of associates accounted for using equity method	£ 113.5	£ 49.8	[1]	£ 47.0	[1]

[1] Prior year figures have been re-presented as described in the accounting policies.

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Our people - Additional Information (Detail) £ in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£) Employees	Dec. 31, 2016 GBP (£) Employees	Dec. 31, 2015 GBP (£) Employees
Disclosure of our people [Line Items]
Average number of staff | Employees	134,428	132,657	124,930
Staff numbers at the end of period | Employees	134,413	134,341	128,123
Share-based incentive plans in respect of key management personnel | £	£ 12.3	£ 15.5	£ 16.7
Total compensation received by key management personnel | £	17.8	57.5	84.2
Compensation received by key management personnel in the form of pension contributions | £	£ 0.7	£ 0.7	£ 0.7
Leadership Equity Acquisition Plan III [member]
Disclosure of our people [Line Items]
LEAP awards vesting performance period	5 years	5 years	5 years
Consolidated entity and associates (includes all employees of associated undertakings) [member]
Disclosure of our people [Line Items]
Staff numbers at the end of period | Employees	203,000	198,000	190,000

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Our people - Geographical Distribution of Staff (Detail) - Employees	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of geographical areas [line items]
Average number of staff	134,428	132,657	124,930
North America [member]
Disclosure of geographical areas [line items]
Average number of staff	27,399	27,246	26,224
United Kingdom [member]
Disclosure of geographical areas [line items]
Average number of staff	14,197	14,070	13,401
Western Continental Europe [member]
Disclosure of geographical areas [line items]
Average number of staff	25,700	24,996	23,506
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of geographical areas [line items]
Average number of staff	67,132	66,345	61,799

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Our people - Operating Sector Distribution of Staff (Detail) - Employees	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of operating segments [line items]
Average number of staff	134,428	132,657	124,930
Advertising and media investment management [member]
Disclosure of operating segments [line items]
Average number of staff	56,789	55,120	53,227
Data investment management [member]
Disclosure of operating segments [line items]
Average number of staff	28,629	29,279	28,395
Public relations & public affairs [member]
Disclosure of operating segments [line items]
Average number of staff	9,082	9,054	8,492
Brand consulting, health & wellness and specialist communications [member]
Disclosure of operating segments [line items]
Average number of staff	39,928	39,204	34,816

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Our people - Staffing Costs (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Classes of employee benefits expense [abstract]
Wages and salaries	£ 5,832.3	£ 5,395.6	£ 4,578.4
Cash-based incentive plans	219.2	260.2	231.8
Share-based incentive plans (note 22)	105.0	106.5	99.0
Social security costs	720.3	658.1	578.4
Pension costs (note 23)	192.0	178.1	160.0
Severance	39.5	34.5	24.0
Other staff costs	1,210.7	1,151.9	981.0
Staffing costs	£ 8,319.0	£ 7,784.9	£ 6,652.6

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Finance income, finance costs and revaluation of financial instruments - Summary of Finance Income, Finance Costs and Revaluation of Financial Instruments (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Analysis of income and expense [abstract]
Income from available for sale investments	£ 16.8	£ 12.5		£ 18.9
Interest income	78.4	67.9		53.5
Finance income	95.2	80.4	[1]	72.4	[1]
Net interest expense on pension plans	6.3	6.7		7.3
Interest on other long-term employee benefits	3.9	2.7		2.5
Interest expense and similar charges	259.6	245.1		214.3
Finance costs	269.8	254.5	[1]	224.1	[1]
Movements in fair value of treasury instruments	1.1	(19.5)		(3.7)
Movements in fair value of other derivatives				15.9
Revaluation of put options over non-controlling interests	52.5	(17.2)		(11.3)
Revaluation of payments due to vendors (earnout agreements)	208.6	(11.6)		(35.6)
Revaluation of financial instruments	£ 262.2	£ (48.3)		£ (34.7)

[1] Prior year figures have been re-presented as described in the accounting policies.

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Finance income, finance costs and revaluation of financial instruments - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions, $ in Millions	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 AUD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 AUD ($)
Disclosure of detailed information about financial instruments [line items]
Borrowings | £		£ 6,481.3				£ 6,033.1
US revolving credit facilities [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			$ 715				$ 109
Average interest rate	0.78%	0.78%	0.78%	0.78%	0.82%	0.82%	0.82%	0.82%
US commercial paper [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			$ 1,069
US commercial paper [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			$ 860				$ 293
Average interest rate	1.47%	1.47%	1.47%	1.47%	0.75%	0.75%	0.75%	0.75%
Australian New Zealand revolving credit facilities [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings				$ 412				$ 336
Average interest rate	3.24%	3.24%	3.24%	3.24%	3.69%	3.69%	3.69%	3.69%
US Dollar bonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			$ 2,862
Average interest rate	4.48%	4.48%	4.48%	4.48%
US Dollar bonds [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			$ 3,741				$ 3,182
Eurobonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | €	€ 3,202				€ 2,952
Average interest rate	1.71%	1.71%	1.71%	1.71%
Eurobonds [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | €	€ 3,108				€ 3,132
Sterling bonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | £		£ 600.0				£ 1,000.0
Average interest rate	4.04%	4.04%	4.04%	4.04%
Sterling bonds [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | £		£ 1,242.0				£ 781.0

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Taxation - Additional Information (Detail) - GBP (£) £ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Income Taxes [line items]
Effective tax rate on profit before taxation		9.30%	20.60%	16.60%
Tax rate		19.25%	20.00%	20.25%
Tax Cuts and Jobs Act revalued deferred tax assets and liabilities		£ 234.1
Tax Cuts and Jobs Act deemed repatriation tax charge related to unremitted foreign earnings		£ (28.1)
Tax Cuts and Jobs Act payable period		8 years
United States [member]
Disclosure Of Income Taxes [line items]
Tax rate		35.00%
United States [member] | Changes in tax rates or tax laws enacted or announced [member]
Disclosure Of Income Taxes [line items]
Tax rate	21.00%

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Taxation - Tax Charge (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Corporation tax
Current year	£ 523.4	£ 569.4		£ 403.0
Prior years	(98.6)	(80.3)		(108.4)
Corporation tax	424.8	489.1		294.6
Deferred tax
Current year	(235.2)	(88.0)		(35.8)
Prior years	7.4	(12.2)		(11.3)
Deferred tax	(227.8)	(100.2)		(47.1)
Tax charge	£ 197.0	£ 388.9	[1]	£ 247.5	[1]

[1] Prior year figures have been re-presented as described in the accounting policies.

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Taxation - Tax Charge Reconciled to Profit Before Taxation (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Profit before taxation	£ 2,109.3	£ 1,890.5	[1]	£ 1,492.6	[1]
Tax at the corporation tax rate of 19.25%	406.0	378.1		302.3
Tax effect of share of results of associates	(21.8)	(10.0)		(9.5)
Irrecoverable withholding taxes	37.0	36.3		25.7
Items that are not deductible in determining taxable profit	(3.9)	9.4		25.4
Effect of different tax rates in subsidiaries operating in other jurisdictions	140.3	60.4		49.9
US Transition Tax related to unremitted foreign earnings	28.1
Effect of change in US tax rate on deferred tax balances	(234.1)
Origination and reversal of unrecognised temporary differences	(17.2)	(4.3)		0.4
Tax losses not recognised or utilised in the year	32.5	52.2		4.0
Utilisation of tax losses not previously recognised	(10.4)	(11.3)		(10.4)
Recognition of temporary differences not previously recognised	(68.3)	(29.4)		(20.6)
Net release of prior year provisions in relation to acquired businesses	(15.0)	(23.3)		(22.9)
Other prior year adjustments	(76.2)	(69.2)		(96.8)
Tax charge	£ 197.0	£ 388.9	[1]	£ 247.5	[1]
Effective tax rate on profit before tax	9.30%	20.60%		16.60%
UK corporation tax rate	19.25%	20.00%		20.25%

[1] Prior year figures have been re-presented as described in the accounting policies.

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Ordinary dividends - Summary of Ordinary Dividends (Detail) - GBP (£) £ / shares in Units, £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Dividends [line items]
Amounts recognised as distributions to equity holders, per share	£ 0.5975	£ 0.4833	£ 0.4249
Amounts recognised as distributions to equity holders	£ 751.5	£ 616.5	£ 545.8
Proposed final dividend, per share	£ 0.3730	£ 0.3705	£ 0.2878
Previous period final amount [member]
Disclosure of Dividends [line items]
Amounts recognised as distributions to equity holders, per share	£ 0.3705	£ 0.2878	£ 0.2658
Amounts recognised as distributions to equity holders	£ 467.2	£ 368.5	£ 343.2
Interim period amount [member]
Disclosure of Dividends [line items]
Amounts recognised as distributions to equity holders, per share	£ 0.2270	£ 0.1955	£ 0.1591
Amounts recognised as distributions to equity holders	£ 284.3	£ 248.0	£ 202.6

XML

Earnings per share - Calculation of Basic and Diluted EPS (Detail) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Earnings per share [abstract]
Earnings	£ 1,816.6	£ 1,400.1		£ 1,160.2
Average shares used in basic EPS calculation	1,261.1	1,277.8		1,288.5
EPS	£ 1.440	£ 1.096	[1]	£ 0.900	[1]
Diluted earnings	£ 1,816.6	£ 1,400.1		£ 1,160.2
Average shares used in diluted EPS calculation	1,275.8	1,296.0		1,313.0
Diluted EPS	£ 1.424	£ 1.080	[1]	£ 0.884	[1]

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Earnings per share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per share [line items]
Shares excluded from the computation of diluted earnings per share	8,200,000	8,400,000	7,000,000
Ordinary shares [member]
Earnings per share [line items]
Ordinary shares in issue	1,332,511,552	1,331,880,730	1,329,366,024

XML

Earnings per share - Reconciliation Between Shares Used in Calculating Basic and Diluted EPS (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per share [abstract]
Average shares used in basic EPS calculation	1,261.1	1,277.8	1,288.5
Dilutive share options outstanding	1.8	2.4	3.5
Other potentially issuable shares	12.9	15.8	21.0
Shares used in diluted EPS calculation	1,275.8	1,296.0	1,313.0

XML

Sources of finance - Summary of Equity and Debt Financing (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis of changes in financing
Beginning balance	£ 9,767.6	£ 8,015.8	£ 7,826.8
Ordinary shares issued	6.4	27.2	27.5
End of year	9,962.0	9,767.6	8,015.8
Analysis of changes in financing
Beginning of year	6,033.1
Net increase/(decrease) in drawings on bank loans and corporate bonds	599.6	(22.5)	492.0
End of year	6,481.3	6,033.1
Debt financing [member]
Analysis of changes in financing
Beginning of year	6,033.1	5,157.4
Net increase/(decrease) in drawings on bank loans and corporate bonds	599.6	(22.5)
Amortisation of financing costs included in net debt	8.0	9.0
Debt acquired		144.4
Other movements	(6.9)	(13.1)
Exchange adjustments	(152.5)	757.9
End of year	6,481.3	6,033.1	5,157.4
Issued capital and share premium [member]
Analysis of changes in financing
Beginning balance	695.4	668.2
Ordinary shares issued	6.4	27.2
End of year	£ 701.8	£ 695.4	£ 668.2

XML

Sources of finance - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2018 EUR (€)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 AUD ($)	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 GBP (£)	Dec. 31, 2014 GBP (£)
Disclosure of detailed information about financial instruments [line items]
Total equity			£ 9,962.0			£ 9,767.6		£ 8,015.8	£ 7,826.8
Total committed facilities available			7,711.7
Undrawn committted credit facility			1,163.8			2,122.3
Borrowings			6,481.3			6,033.1
Issued capital and share premium [member]
Disclosure of detailed information about financial instruments [line items]
Total equity			701.8			£ 695.4		£ 668.2
US$ bonds due November 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 600.7	$ 812
Bonds interest rate		4.75%	4.75%	4.75%	4.75%
US$ bonds due September 2022 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 369.7	$ 500
Bonds interest rate		3.625%	3.625%	3.625%	3.625%
US$ bonds due September 2024 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 554.6	$ 750
Bonds interest rate		3.75%	3.75%	3.75%	3.75%
US$ bonds maturing September 2042 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 221.8	$ 300
Bonds interest rate		5.125%	5.125%	5.125%	5.125%
US$ bonds due November 2043 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 369.7	$ 500
Bonds interest rate		5.625%	5.625%	5.625%	5.625%
Eurobonds (3m EURIBOR + 0.32%) due May 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 250	£ 222.2
Floating basis		3m EURIBOR
Adjustment to floating basis		0.32%	0.32%	0.32%	0.32%
Euro bonds due March 2018 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 252	£ 224.0
Bonds interest rate		0.43%	0.43%	0.43%	0.43%
Euro bonds due November 2019 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 600	£ 533.3
Bonds interest rate		0.75%	0.75%	0.75%	0.75%
Euro bonds due November 2023 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 750	£ 666.7
Bonds interest rate		3.00%	3.00%	3.00%	3.00%
Euro bonds due September 2026 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 750	£ 666.7
Bonds interest rate		2.25%	2.25%	2.25%	2.25%
Euro bonds due March 2030 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available		€ 600	£ 533.3
Bonds interest rate		1.625%	1.625%	1.625%	1.625%
Sterling bonds due November 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 200.0
Bonds interest rate		6.375%	6.375%	6.375%	6.375%
Sterling bonds due September 2046 [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 400.0
Bonds interest rate		2.875%	2.875%	2.875%	2.875%
US revolving credit facilities [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available			£ 1,848.6	$ 2,500
Borrowings averaged equivalent | $				$ 715
US revolving credit facilities [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Bonds interest rate		0.78%	0.78%	0.78%	0.78%	0.82%	0.82%
Borrowings | $				$ 715			$ 109
Australian New Zealand revolving credit facilities [member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available | $					$ 520
Borrowings averaged equivalent | $					$ 412
US commercial paper [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | $				$ 1,069
US commercial paper [member] | Weighted average [member]
Disclosure of detailed information about financial instruments [line items]
Bonds interest rate		1.47%	1.47%	1.47%	1.47%	0.75%	0.75%
Borrowings | $				$ 860			$ 293
Eurobonds Due March 2025 [Member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available | €	€ 500
Bonds interest rate	1.375%
Eurobonds Due March 2022 [Member]
Disclosure of detailed information about financial instruments [line items]
Total committed facilities available | €	€ 250
Bonds interest rate	0.45%
Floating basis	3m EURIBOR

XML

Sources of finance - Analysis of Future Anticipated Cash Flows Related to Debt (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	£ (8,810.3)	£ (8,726.4)
Effect of discounting/financing rates	1,935.8	2,159.0
Debt financing	(6,874.5)	(6,567.4)
Within one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(624.1)	(1,002.5)
Between one and two years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(727.6)	(208.0)
Between two and three years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(421.0)	(717.2)
Between three and four years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(1,384.2)	(195.7)
Between four and five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(356.6)	(660.9)
Over five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Debt financing	(3,361.0)	(3,783.1)
Borrowings [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(8,417.1)	(8,192.1)
Borrowings [member] | Within one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(391.7)	(582.9)
Borrowings [member] | Between one and two years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(896.3)	(389.5)
Borrowings [member] | Between two and three years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(584.3)	(893.0)
Borrowings [member] | Between three and four years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(1,537.8)	(369.1)
Borrowings [member] | Between four and five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(487.9)	(812.9)
Borrowings [member] | Over five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	(4,519.1)	(5,144.7)
Bank overdrafts [member] | Within one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Future anticipated cash flows	£ (393.2)	£ (534.3)

XML

Sources of finance - Analysis of Fixed and Floating Rate Debt by Currency (Detail) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 GBP (£)
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 6,481.3		£ 6,033.1
US Dollar bonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | $				$ 2,862
US Dollar bonds [member] | Fixed interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 1,146.1		£ 1,255.6
Fixed rate	4.62%	4.62%	4.62%	4.62%	4.62%
Period (months)	199 months	212 months
US Dollar bonds [member] | Floating interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 1,760.9		£ 1,063.1
Fixed rate	3.19%		3.19%	3.19%
Floating basis	LIBOR	LIBOR
Period (months)	29 months
Sterling bonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 600.0		1,000.0
Sterling bonds [member] | Fixed interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 600.0		£ 800.0
Fixed rate	4.04%	4.53%	4.04%	4.04%	4.53%
Period (months)	245 months	193 months
Sterling bonds [member] | Floating interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings					£ 200.0
Floating basis		LIBOR
Eurobonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings | €	€ 3,202	€ 2,952
Eurobonds [member] | Fixed interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 2,623.9		£ 2,521.9
Fixed rate	1.85%	1.85%	1.85%	1.85%	1.85%
Period (months)	80 months	93 months
Eurobonds [member] | Floating interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 222.2
Fixed rate	0.00%		0.00%	0.00%
Floating basis	EURIBOR
Period (months)	29 months
Other bonds [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings			£ 128.2		£ 192.5

XML

Sources of finance - Analysis of Future Anticipated Cash Flows in Related to Financial Derivatives (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade and Other Payable [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	£ 683.9	£ 783.2
Future anticipated cash flows, Financial assets	1,053.5	2,140.2
Trade and Other Payable [member] | Within one year [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	97.8	183.2
Future anticipated cash flows, Financial assets	123.7	282.5
Trade and Other Payable [member] | Between one and two years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	21.4	19.2
Future anticipated cash flows, Financial assets	38.6	51.7
Trade and Other Payable [member] | Between two and three years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	20.5	18.8
Future anticipated cash flows, Financial assets	39.5	57.5
Trade and Other Payable [member] | Between three and four years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	20.7	20.0
Future anticipated cash flows, Financial assets	851.7	61.2
Trade and Other Payable [member] | Between four and five years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	523.5	20.7
Future anticipated cash flows, Financial assets		1,687.3
Trade and Other Payable [member] | Over five years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities		521.3
Trade and other receivable [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	675.3	776.0
Future anticipated cash flows, Financial assets	1,057.2	2,162.7
Trade and other receivable [member] | Within one year [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	96.7	183.0
Future anticipated cash flows, Financial assets	128.8	302.2
Trade and other receivable [member] | Between one and two years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	20.1	20.6
Future anticipated cash flows, Financial assets	38.8	55.4
Trade and other receivable [member] | Between two and three years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	18.8	18.1
Future anticipated cash flows, Financial assets	38.6	58.5
Trade and other receivable [member] | Between three and four years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	18.6	18.1
Future anticipated cash flows, Financial assets	851.0	60.5
Trade and other receivable [member] | Between four and five years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities	£ 521.1	18.1
Future anticipated cash flows, Financial assets		1,686.1
Trade and other receivable [member] | Over five years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Future anticipated cash flows, Financial liabilities		£ 518.1

XML

Analysis of cash flows - Summary of Analysis of Cash Flows (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Disclosure Of Cash Flow Statement [Line Items]
Profit for the year	£ 1,912.3	£ 1,501.6	[1]	£ 1,245.1	[1]
Taxation	197.0	388.9		247.5
Revaluation of financial instruments	(262.2)	48.3		34.7
Finance costs	269.8	254.5		224.1
Finance income	(95.2)	(80.4)		(72.4)
Share of results of associates	(113.5)	(49.8)		(47.0)
Adjustments for:
Non-cash share-based incentive plans (including share options)	105.0	106.5		99.0
Depreciation of property, plant and equipment	230.7	220.8		194.7
Impairment of goodwill	27.1	27.0		15.1
Amortisation and impairment of acquired intangible assets	195.1	168.4		140.1
Amortisation of other intangible assets	36.3	38.6		33.7
Investment write-downs	95.9	86.1		78.7
Gains on disposal of investments and subsidiaries	(129.0)	(44.3)		(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership	0.3	(232.4)		(165.0)
Losses on sale of property, plant and equipment	1.1	0.8		1.1
(Increase)/decrease in inventories and work in progress	(44.6)	(16.7)		7.8
Increase in trade receivables and accrued income	(45.8)	(53.7)		(882.7)
(Decrease)/increase in trade payables and deferred income	(170.8)	188.7		713.4
(Increase)/decrease in other receivables	(110.6)	77.4		(39.0)
(Decrease)/increase in other payables-short term	(122.8)	(303.7)		74.5
Increase in other payables-long-term	20.1	4.5		24.2
Decrease in provisions	(57.3)	(47.8)		(62.3)
Corporation and overseas tax paid	(424.7)	(414.2)		(301.2)
Interest and similar charges paid	(246.6)	(242.1)		(212.0)
Interest received	76.9	73.9		61.3
Investment income	16.8	12.5		4.9
Dividends from associates	46.8	60.4		72.6
Net cash inflow from operating activities	1,408.1	1,773.8		1,359.9
Acquisitions and disposals:
Initial cash consideration	(214.8)	(424.1)		(463.5)
Cash and cash equivalents acquired (net)	28.9	57.3		57.7
Earnout payments	(199.1)	(92.3)		(43.9)
Purchase of other investments (including associates)	(92.5)	(260.2)		(283.2)
Proceeds on disposal of investments and subsidiaries	296.0	80.5		63.4
Acquisitions and disposals	(181.5)	(638.8)		(669.5)
Cash consideration for non-controlling interests	(47.3)	(58.3)		(23.6)
Net cash outflow	(228.8)	(697.1)		(693.1)
Share repurchases and buy-backs:
Purchase of own shares by ESOP Trusts	(214.6)	(152.9)		(181.6)
Shares purchased into treasury	(289.6)	(274.5)		(406.0)
Net cash outflow	(504.2)	(427.4)		(587.6)
Net increase/(decrease) in borrowings:
Increase/(decrease) in drawings on bank loans	785.6	(30.4)		128.9
Net cash inflow/(outflow)	599.6	(22.5)		492.0
Cash and cash equivalents:
Cash at bank and in hand	2,049.6	2,256.2		2,227.8
Short-term bank deposits	341.8	180.7		154.6
Overdrafts	(393.2)	(534.3)		(435.8)
Cash and cash equivalents	1,998.2	1,902.6		1,946.6		£ 2,247.6
Proceeds from issue of EUR 250 million bonds [member]
Net increase/(decrease) in borrowings:
Proceeds from issues of bonds	214.0
Repayment of GBP 400 million bonds [member]
Net increase/(decrease) in borrowings:
Repayment of bonds	£ (400.0)
Proceeds from issue of GBP 400 million bonds [member]
Net increase/(decrease) in borrowings:
Proceeds from issues of bonds		400.0
Repayment of EUR 498 million bonds [member]
Net increase/(decrease) in borrowings:
Repayment of bonds		£ (392.1)
Proceeds from issue of EUR 600 million bonds [member]
Net increase/(decrease) in borrowings:
Proceeds from issues of bonds				858.7
Repayment of EUR 500 million bonds [member]
Net increase/(decrease) in borrowings:
Repayment of bonds				(481.9)
Premium on exchange of EUR 252 million bonds [member]
Net increase/(decrease) in borrowings:
Premium on exchange of bonds				£ (13.7)

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Analysis of cash flows - Summary of Analysis of Cash Flows (Parenthetical) (Detail)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 GBP (£)	Dec. 31, 2015 EUR (€)
Disclosure Of Cash Flow Statement [Line Items]
Bond amount | £		£ 7,711,700,000
Proceeds from issue of EUR 250 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount	€ 250,000,000
Repayment of GBP 400 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount | £		£ 400,000,000
Proceeds from issue of GBP 400 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount | £				£ 400,000,000
Repayment of EUR 498 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount			€ 498,000,000
Proceeds from issue of EUR 600 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount					€ 600,000,000
Repayment of EUR 500 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount					500,000,000
Premium on exchange of EUR 252 million bonds [member]
Disclosure Of Cash Flow Statement [Line Items]
Bond amount					€ 252,000,000

XML

Intangible assets - Movements of Goodwill (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of reconciliation of changes in goodwill [line items]
Beginning balance	£ 13,214.3	£ 10,670.6
Impairment losses for the year	27.1	27.0	£ 15.1
Ending balance	12,952.9	13,214.3	10,670.6
Cost [member]
Disclosure of reconciliation of changes in goodwill [line items]
Beginning balance	13,939.4	11,294.2
Additions	301.0	796.6
Revision of earnout estimates	(60.7)	28.4
Exchange adjustments	(504.4)	1,820.2
Ending balance	13,675.3	13,939.4	11,294.2
Accumulated impairment losses and write-downs [member]
Disclosure of reconciliation of changes in goodwill [line items]
Beginning balance	725.1	623.6
Impairment losses for the year	27.1	20.0
Exchange adjustments	(29.8)	81.5
Ending balance	£ 722.4	£ 725.1	£ 623.6

XML

Intangible assets - Cash-generating Units with Significant Goodwill (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of information for cash-generating units [line items]
Goodwill	£ 12,952.9	£ 13,214.3	£ 10,670.6
GroupM [member]
Disclosure of information for cash-generating units [line items]
Goodwill	2,906.7	2,966.2
Kantar [member]
Disclosure of information for cash-generating units [line items]
Goodwill	2,518.2	2,573.0
Wunderman [member]
Disclosure of information for cash-generating units [line items]
Goodwill	1,514.5	1,297.1
Y&R Advertising [member]
Disclosure of information for cash-generating units [line items]
Goodwill	1,091.8	1,140.3
Burson-Marsteller [member]
Disclosure of information for cash-generating units [line items]
Goodwill	557.6	590.3
Other [member]
Disclosure of information for cash-generating units [line items]
Goodwill	£ 4,364.1	£ 4,647.4

XML

Intangible assets - Movements of Other Intangible Assets (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about intangible assets [line items]
Beginning balance	£ 2,217.3	£ 1,715.4
Ending balance	2,018.4	2,217.3
Cost [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	4,080.9	3,306.2
Additions	37.3	33.0
Disposals	(15.8)	(43.0)
New acquisitions	79.8	329.6
Other movements	13.6	16.3
Exchange adjustments	(155.2)	438.8
Ending balance	4,040.6	4,080.9
Amortisation and impairment [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	1,863.6	1,590.8
Charge for the year	225.7	201.9
Disposals	(14.9)	(39.9)
Other movements	2.5	2.0
Exchange adjustments	(54.7)	108.8
Ending balance	2,022.2	1,863.6
Brands with an indefinite useful life [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	1,141.3	968.1
Ending balance	1,081.3	1,141.3
Brands with an indefinite useful life [member] | Cost [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	1,141.3	968.1
Exchange adjustments	(60.0)	173.2
Ending balance	1,081.3	1,141.3
Acquired intangibles [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	972.5	667.6
Ending balance	829.1	972.5
Acquired intangibles [member] | Cost [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	2,535.5	2,007.1
Disposals		(0.8)
New acquisitions	79.0	319.1
Other movements	6.4	11.6
Exchange adjustments	(73.1)	198.5
Ending balance	2,547.8	2,535.5
Acquired intangibles [member] | Amortisation and impairment [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	1,563.0	1,339.5
Charge for the year	189.4	163.3
Disposals		(0.4)
Exchange adjustments	(33.7)	60.6
Ending balance	1,718.7	1,563.0
Other [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	103.5	79.7
Ending balance	108.0	103.5
Other [member] | Cost [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	404.1	331.0
Additions	37.3	33.0
Disposals	(15.8)	(42.2)
New acquisitions	0.8	10.5
Other movements	7.2	4.7
Exchange adjustments	(22.1)	67.1
Ending balance	411.5	404.1
Other [member] | Amortisation and impairment [member]
Disclosure of detailed information about intangible assets [line items]
Beginning balance	300.6	251.3
Charge for the year	36.3	38.6
Disposals	(14.9)	(39.5)
Other movements	2.5	2.0
Exchange adjustments	(21.0)	48.2
Ending balance	£ 303.5	£ 300.6

XML

Intangible assets - Additional Information (Detail) - GBP (£)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about intangible assets [line items]
Other Intangible Assets	£ 2,018,400,000	£ 2,217,300,000	£ 1,715,400,000
Amortisation and impairment of acquired intangible assets	£ 195,100,000	£ 168,400,000
Pre-tax discount rate	8.50%	8.50%
Assumed annual long-term growth rate	3.00%	3.00%
Goodwill impairment charge	£ 27,100,000	£ 27,000,000	£ 15,100,000
Excess of recoverable amount over carrying amount related to Burson-Marsteller	£ 36,700,000
Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Management forecasts for a projection period	Five years
Associates [member]
Disclosure of detailed information about intangible assets [line items]
Amortisation and impairment of acquired intangible assets	£ 5,700,000	5,100,000
Goodwill impairment charge	0	7,000,000
Brand names [member]
Disclosure of detailed information about intangible assets [line items]
Other Intangible Assets	445,600,000	486,200,000
Customer-related intangibles [member]
Disclosure of detailed information about intangible assets [line items]
Other Intangible Assets	360,900,000	448,900,000
Other acquired intangible assets [member]
Disclosure of detailed information about intangible assets [line items]
Other Intangible Assets	£ 22,600,000	£ 37,400,000

XML

Property, plant and equipment - Summary of Property, Plant and Equipment (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	£ 968.7	£ 797.7
Charge for the year	230.7	215.2	£ 190.0
Ending balance	979.5	968.7	797.7
Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	2,322.0	1,917.9
Additions	288.9	252.1
New acquisitions	5.5	20.6
Disposals	(142.6)	(236.0)
Exchange adjustments	(155.9)	367.4
Ending balance	2,317.9	2,322.0	1,917.9
Depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	1,353.3	1,120.2
Charge for the year	230.7	220.8
Disposals	(134.8)	(229.0)
Exchange adjustments	(110.8)	241.3
Ending balance	1,338.4	1,353.3	1,120.2
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	37.1	37.1
Ending balance	37.1	37.1	37.1
Land [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	37.1	37.1
Ending balance	37.1	37.1	37.1
Freehold buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	101.2	83.0
Ending balance	90.3	101.2	83.0
Freehold buildings [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	126.4	102.2
Additions	4.3	1.3
Disposals	(1.2)	(0.3)
Exchange adjustments	(10.7)	23.2
Ending balance	118.8	126.4	102.2
Freehold buildings [member] | Depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	25.2	19.2
Charge for the year	6.9	4.3
Disposals	(1.9)	(0.6)
Exchange adjustments	(1.7)	2.3
Ending balance	28.5	25.2	19.2
Leasehold buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	502.7	414.2
Ending balance	555.7	502.7	414.2
Leasehold buildings [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	1,012.5	837.4
Additions	165.0	107.9
New acquisitions	2.0	7.9
Disposals	(46.1)	(83.2)
Exchange adjustments	(51.6)	142.5
Ending balance	1,081.8	1,012.5	837.4
Leasehold buildings [member] | Depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	509.8	423.2
Charge for the year	86.7	81.1
Disposals	(42.6)	(77.8)
Exchange adjustments	(27.8)	83.3
Ending balance	526.1	509.8	423.2
Fixtures, fittings and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	162.6	129.4
Ending balance	140.3	162.6	129.4
Fixtures, fittings and equipment [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	402.6	338.3
Additions	31.7	55.9
New acquisitions	2.4	6.5
Disposals	(40.7)	(46.1)
Exchange adjustments	(18.8)	48.0
Ending balance	377.2	402.6	338.3
Fixtures, fittings and equipment [member] | Depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	240.0	208.9
Charge for the year	47.0	45.7
Disposals	(35.9)	(49.2)
Exchange adjustments	(14.2)	34.6
Ending balance	236.9	240.0	208.9
Computer equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	165.1	134.0
Ending balance	156.1	165.1	134.0
Computer equipment [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	743.4	602.9
Additions	87.9	87.0
New acquisitions	1.1	6.2
Disposals	(54.6)	(106.4)
Exchange adjustments	(74.8)	153.7
Ending balance	703.0	743.4	602.9
Computer equipment [member] | Depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	578.3	468.9
Charge for the year	90.1	89.7
Disposals	(54.4)	(101.4)
Exchange adjustments	(67.1)	121.1
Ending balance	£ 546.9	£ 578.3	£ 468.9

XML

Property, plant and equipment - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, plant & equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Capital commitments contracted	£ 137.2	£ 22.1

XML

Interests in associates, joint ventures and other investments - Movements in Associates, Joint Ventures and Other Investments (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Movements in interests in associates and joint ventures
Beginning balance	£ 1,069.4	£ 758.6
Additions	34.1	(1.3)
Goodwill arising on acquisition of new associates	0.4	292.2
Share of results of associate undertakings (note 4)	113.5	49.8	[1]	£ 47.0	[1]
Dividends	(46.8)	(60.4)
Other movements	3.4	7.1
Reclassification from other investments to associates	57.1	74.3
Exchange adjustments	(10.6)	111.7
Disposals	(139.1)	(12.7)
Reclassification to subsidiaries	(6.3)	(133.0)
Amortisation of other intangible assets	(5.7)	(5.1)
Goodwill impairment		(7.0)
Write-downs	(4.2)	(4.8)
Ending balance	1,065.2	1,069.4		758.6
Movements in interests in other investments
Beginning balance	1,310.3	1,158.7
Additions	67.7	233.5
Reclassification from other investments to associates	(57.1)	(74.3)
Exchange adjustments	(106.1)	170.4
Disposals	(1.7)	(3.4)
Reclassification to subsidiaries		(0.2)
Revaluation of other investments	32.1	(93.1)
Write-downs	(91.7)	(81.3)
Ending balance	1,153.5	1,310.3		1,158.7
Net assets of associates and joint ventures [member]
Movements in interests in associates and joint ventures
Beginning balance	320.4	334.1
Additions	34.1	(1.3)
Share of results of associate undertakings (note 4)	113.5	49.8
Dividends	(46.8)	(60.4)
Other movements	4.7	(45.3)
Reclassification from other investments to associates	57.1	43.6
Exchange adjustments	(7.3)	61.6
Disposals	(59.2)	(12.7)
Reclassification to subsidiaries	(3.4)	(44.2)
Write-downs	(4.2)	(4.8)
Ending balance	408.9	320.4		334.1
Movements in interests in other investments
Reclassification from other investments to associates	(57.1)	(43.6)
Goodwill and other intangibles of associates and joint ventures [member]
Movements in interests in associates and joint ventures
Beginning balance	749.0	424.5
Goodwill arising on acquisition of new associates	0.4	292.2
Other movements	(1.3)	52.4
Reclassification from other investments to associates		30.7
Exchange adjustments	(3.3)	50.1
Disposals	(79.9)
Reclassification to subsidiaries	(2.9)	(88.8)
Amortisation of other intangible assets	(5.7)	(5.1)
Goodwill impairment		(7.0)
Ending balance	£ 656.3	749.0		£ 424.5
Movements in interests in other investments
Reclassification from other investments to associates		£ (30.7)

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Interests in associates, joint ventures and other investments - Principal Associates and Joint Ventures (Detail)	12 Months Ended
	Dec. 31, 2017
Barrows Design and Manufacturing (Pty) Limited [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	South Africa
Associate, % owned	35.00%
Bruin Sports Capital LLC [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	USA
Associate, % owned	38.20%
Chime Communications Ltd [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	UK
Associate, % owned	24.90%
CVSC Sofres Media Co Limited [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	China
Associate, % owned	40.00%
GIIR Inc [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	Korea
Associate, % owned	30.00%
Globant S.A. [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	Argentina
Associate, % owned	19.20%
Haworth Marketing & Media Company [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	USA
Associate, % owned	49.00%
High Co SA [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	France
Associate, % owned	34.10%
Imagina [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	Spain
Associate, % owned	23.50%
Marktest Investimentos SGPS S.A. [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	Portugal
Associate, % owned	43.10%
Richard Attias and Associates [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	USA
Associate, % owned	49.00%
Smollan Holdings (Pty) Ltd. [member]
Disclosure of principal associates and joint ventures [line items]
Associate, Country of incorporation	South Africa
Associate, % owned	24.80%

XML

Interests in associates, joint ventures and other investments - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of principal associates and joint ventures [line items]
Carrying value (including goodwill and other intangibles) of equity interests	£ 1,065.2	£ 1,069.4	£ 758.6
GIIR Inc [member]
Disclosure of principal associates and joint ventures [line items]
Market value of equity interests	35.4	26.9
Carrying value (including goodwill and other intangibles) of equity interests	41.6	37.9
Globant S.A. [member]
Disclosure of principal associates and joint ventures [line items]
Market value of equity interests	229.7	180.7
Carrying value (including goodwill and other intangibles) of equity interests	76.4	78.5
High Co SA [member]
Disclosure of principal associates and joint ventures [line items]
Market value of equity interests	33.3	21.0
Carrying value (including goodwill and other intangibles) of equity interests	34.5	31.4
Associates and Other Investments [member]
Disclosure of principal associates and joint ventures [line items]
Capital commitments contracted	£ 54.2	£ 89.2

XML

Interests in associates, joint ventures and other investments - Summary of Aggregate Financial Performance and Net Asset Position of Associates and Joint Ventures (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Income statement
Revenue	£ 15,265.4	£ 14,388.9	[1]	£ 12,235.2	[1]
Operating profit	1,908.2	2,063.1	[1]	1,632.0	[1]
Profit before taxation	2,109.3	1,890.5	[1]	1,492.6	[1]
Profit for the year	1,912.3	1,501.6	[1]	1,245.1	[1]
Balance sheet
Net assets	9,962.0	9,767.6
Associates and Joint Ventures [member]
Income statement
Revenue	3,800.8	2,254.5		2,049.5
Operating profit	440.4	308.3		283.7
Profit before taxation	381.9	237.2		236.5
Profit for the year	312.5	156.7		162.0
Balance sheet
Assets	3,192.9	4,223.1		3,912.4
Liabilities	(1,633.7)	(1,900.0)		(1,906.2)
Net assets	£ 1,559.2	£ 2,323.1		£ 2,006.2

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Deferred tax - Analysis of Deferred Tax Balances for Financial Reporting Purposes (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	£ 160.3	£ 140.4
Deferred tax liabilities	(513.7)	(692.4)
Deferred tax assets (liabilities)	(353.4)	(552.0)
Gross amount before offset [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	411.8	598.0
Deferred tax liabilities	(765.2)	(1,150.0)
Deferred tax assets (liabilities)	(353.4)	(552.0)
Offset amount [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	(251.5)	(457.6)
Deferred tax liabilities	£ 251.5	£ 457.6

XML

Deferred tax - Movements of Major Gross Deferred Tax Assets (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	£ 552.0
Ending balance	353.4	£ 552.0
Gross deferred tax assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	598.0	410.7
Acquisition of subsidiaries	2.6	22.3
(Charge)/credit to income	(60.2)	95.9
Impact of US tax reform	(62.1)
Charge to other comprehensive income	(20.9)	1.8
Charge to equity	(27.3)	(15.0)
Exchange differences	(18.3)	82.3
Ending balance	411.8	598.0
Gross deferred tax assets [member] | Deferred compensation [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	95.6	41.9
(Charge)/credit to income	(5.5)	39.5
Impact of US tax reform	(30.8)
Exchange differences	(5.8)	14.2
Ending balance	53.5	95.6
Gross deferred tax assets [member] | Accounting provisions & accruals [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	80.6	49.5
Acquisition of subsidiaries		7.1
(Charge)/credit to income	6.6	8.5
Impact of US tax reform	(8.1)
Exchange differences	5.8	15.5
Ending balance	84.9	80.6
Gross deferred tax assets [member] | Retirement benefit obligation [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	141.4	91.0
(Charge)/credit to income	(10.2)	28.3
Impact of US tax reform	(29.1)
Charge to other comprehensive income	(20.9)	1.8
Exchange differences	(5.6)	20.3
Ending balance	75.6	141.4
Gross deferred tax assets [member] | Property, plant & equipment [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	70.8	44.7
(Charge)/credit to income	6.9	19.2
Impact of US tax reform	(6.8)
Exchange differences	(2.5)	6.9
Ending balance	68.4	70.8
Gross deferred tax assets [member] | Tax losses & credits [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	89.7	71.3
(Charge)/credit to income	(34.4)	6.2
Impact of US tax reform	23.1
Exchange differences	(5.7)	12.2
Ending balance	72.7	89.7
Gross deferred tax assets [member] | Share-based payments [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	75.8	78.8
Acquisition of subsidiaries		0.2
(Charge)/credit to income	(0.4)	(1.8)
Impact of US tax reform	(10.9)
Charge to equity	(27.3)	(15.0)
Exchange differences	(4.2)	13.6
Ending balance	33.0	75.8
Gross deferred tax assets [member] | Restructuring provisions [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	5.9	16.9
(Charge)/credit to income	(1.5)	(11.7)
Impact of US tax reform	1.6
Exchange differences	(0.2)	0.7
Ending balance	5.8	5.9
Gross deferred tax assets [member] | Other temporary differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	38.2	16.6
Acquisition of subsidiaries	2.6	15.0
(Charge)/credit to income	(21.7)	7.7
Impact of US tax reform	(1.1)
Exchange differences	(0.1)	(1.1)
Ending balance	£ 17.9	£ 38.2

XML

Deferred tax - Movements of Gross Deferred Tax Liabilities (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	£ 552.0
Ending balance	353.4	£ 552.0
Gross deferred tax liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	1,150.0	868.9
Acquisition of subsidiaries	21.4	114.8
(Credit)/charge to income	(53.9)	(4.3)
Impact of US tax reform	(296.2)
Charge to other comprehensive income	3.7	2.2
Exchange differences	(59.8)	168.4
Ending balance	765.2	1,150.0
Gross deferred tax liabilities [member] | Brands and other intangibles [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	755.9	577.1
Acquisition of subsidiaries	21.4	114.8
(Credit)/charge to income	(49.9)	(51.3)
Impact of US tax reform	(203.8)
Exchange differences	(34.4)	115.3
Ending balance	489.2	755.9
Gross deferred tax liabilities [member] | Associate earnings [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	28.3	22.5
(Credit)/charge to income	(6.0)	3.1
Exchange differences	(0.7)	2.7
Ending balance	21.6	28.3
Gross deferred tax liabilities [member] | Goodwill [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	232.5	176.7
(Credit)/charge to income	0.7	23.5
Impact of US tax reform	(76.3)
Exchange differences	(16.5)	32.3
Ending balance	140.4	232.5
Gross deferred tax liabilities [member] | Property, plant & equipment [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	36.2	30.9
(Credit)/charge to income	(0.5)	(0.4)
Impact of US tax reform	(11.9)
Exchange differences	(2.6)	5.7
Ending balance	21.2	36.2
Gross deferred tax liabilities [member] | Financial instruments [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	64.0	50.7
(Credit)/charge to income	(3.3)	3.5
Impact of US tax reform	(22.2)
Exchange differences	(2.3)	9.8
Ending balance	36.2	64.0
Gross deferred tax liabilities [member] | Other temporary differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Beginning balance	33.1	11.0
(Credit)/charge to income	5.1	17.3
Impact of US tax reform	18.0
Charge to other comprehensive income	3.7	2.2
Exchange differences	(3.3)	2.6
Ending balance	£ 56.6	£ 33.1

XML

Deferred tax - Additional Information (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Gross tax losses and other temporary differences available for offset against future profits	£ 4,709.2	£ 5,153.2
Gross tax losses and other temporary differences, deferred tax assets that have been recognised	1,539.3	1,104.4
Gross tax losses and other temporary differences, deferred tax assets that have not been recognised	3,169.9	4,048.8
Unrecognised temporary differences	33.4
Losses carried forward	2,945.2
Temporary differences, deferred tax liabilities that have not been recognised	£ 3,898.0	£ 3,270.8
Bottom of range [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognised temporary differences, period	1 year
Top of range [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unrecognised temporary differences, period	10 years

XML

Inventory and work in progress - Summary of Inventory and Work in Progress (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Classes of current inventories [abstract]
Work in progress	£ 401.1	£ 383.1
Inventory	23.2	17.3
Total inventories	£ 424.3	£ 400.4

XML

Trade and other receivables - Summary of Trade and Other Receivables, Amounts Falling Due Within One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade and other current receivables [abstract]
Trade receivables (net of bad debt provision)	£ 7,889.7	£ 8,054.2
VAT and sales taxes recoverable	202.3	157.2
Prepayments	298.3	310.0
Accrued income	3,211.7	3,353.8
Fair value of derivatives	1.0	14.7
Other debtors	509.3	484.6
Trade and other receivables	£ 12,112.3	£ 12,374.5

XML

Trade and other receivables - Ageing of Trade Receivables and Other Financial Assets (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [Line items]
Financial assets	£ 8,390.1	£ 8,558.7
Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	7,889.7	8,054.2
Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	500.4	504.5
0-30 days [member]
Disclosure of financial assets [Line items]
Financial assets	1,736.6	1,702.3
0-30 days [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	1,629.6	1,611.0
0-30 days [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	107.0	91.3
31-90 days [member]
Disclosure of financial assets [Line items]
Financial assets	583.6	699.9
31-90 days [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	577.0	683.6
31-90 days [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	6.6	16.3
91-180 days [member]
Disclosure of financial assets [Line items]
Financial assets	147.7	163.3
91-180 days [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	143.0	156.6
91-180 days [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	4.7	6.7
181 days - 1 year [member]
Disclosure of financial assets [Line items]
Financial assets	59.1	49.1
181 days - 1 year [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	48.8	37.2
181 days - 1 year [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	10.3	11.9
Greater than 1 year [member]
Disclosure of financial assets [Line items]
Financial assets	65.3	63.5
Greater than 1 year [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	24.7	20.2
Greater than 1 year [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	40.6	43.3
Neither past due nor impaired [member]
Disclosure of financial assets [Line items]
Financial assets	5,797.8	5,880.6
Neither past due nor impaired [member] | Trade receivables [member]
Disclosure of financial assets [Line items]
Financial assets	5,466.6	5,545.6
Neither past due nor impaired [member] | Other financial assets [member]
Disclosure of financial assets [Line items]
Financial assets	£ 331.2	£ 335.0

XML

Trade and other receivables - Summary of Trade and Other Receivables, Amounts Falling Due After More Than One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade and other non-current receivables [abstract]
Prepayments	£ 3.6	£ 3.7
Accrued income	20.5	9.5
Fair value of derivatives	2.1	8.3
Other debtors	150.0	183.4
Trade and other receivables	£ 176.2	£ 204.9

XML

Trade and other receivables - Bad Debt Provisions (Detail) - Trade receivables [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of financial assets [Line items]
Balance at beginning of year	£ 93.8	£ 85.4	£ 85.3
New acquisitions	1.2	1.8	1.0
Charged to operating costs	27.4	15.5	21.6
Exchange adjustments	(4.1)	13.7	0.2
Utilisations and other movements	(27.0)	(22.6)	(22.7)
Balance at end of year	£ 91.3	£ 93.8	£ 85.4

XML

Trade and other receivables - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Trade and other receivables [abstract]
Allowance for bad and doubtful debts as a percentage of gross trade accounts receivables	1.10%	1.20%	1.20%

XML

Trade and other payables - Summary of Trade and Other Payables, Amounts Falling Due within One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade and other current payables [abstract]
Trade payables	£ 9,893.0	£ 10,308.3
Deferred income	1,212.1	1,312.7
Payments due to vendors (earnout agreements)	180.7	277.5
Liabilities in respect of put option agreements with vendors	38.6	51.0
Fair value of derivatives	3.5	4.1
Other creditors and accruals	2,913.2	3,056.8
Total	£ 14,241.1	£ 15,010.4

XML

Trade and other payables - Summary of Trade and Other Payables, Amounts Falling Due After More Than One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Trade and other non-current payables [abstract]
Payments due to vendors (earnout agreements)	£ 450.0	£ 699.0
Liabilities in respect of put option agreements with vendors	219.5	246.0
Fair value of derivatives	3.3	1.8
Other creditors and accruals	320.0	327.0
Trade and other payables	£ 992.8	£ 1,273.8

XML

Trade and other payables - Payments Due to Vendors (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	£ 630.7	£ 976.5	£ 581.3
Within one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	180.7	277.5
Between one and two years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	128.3	220.1
Between two and three years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	144.1	170.2
Between three and four years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	58.3	176.6
Between four and five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	103.1	122.4
Over five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Payments due to vendors	£ 16.2	£ 9.7

XML

Trade and Other Payables Amounts Falling Due After More than One Year - Summary of Contingent Consideration (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Fair Value Of Contingent Consideration [Abstract]
At beginning of year	£ 976.5	£ 581.3
Earnouts paid	(199.1)	(92.3)	£ (43.9)
New acquisitions	163.7	359.5
Revision of estimates taken to goodwill	(60.7)	28.4
Revaluation of payments due to vendors	(208.6)	11.6
Exchange adjustments	(41.1)	88.0
At end of year	£ 630.7	£ 976.5	£ 581.3

XML

Trade and other payables - Additional Information (Detail) - GBP (£)	Dec. 31, 2017	Dec. 31, 2016
Bottom of range [member] | Earnout agreements for acquisitions completed in the current year [member]
Disclosure of trade and other payables [Line Items]
Potential undiscounted amount of future payments	£ 0	£ 0
Bottom of range [member] | All earn-out agreements [member]
Disclosure of trade and other payables [Line Items]
Potential undiscounted amount of future payments	0	0
Top of range [member] | Earnout agreements for acquisitions completed in the current year [member]
Disclosure of trade and other payables [Line Items]
Potential undiscounted amount of future payments	228,000,000	453,000,000
Top of range [member] | All earn-out agreements [member]
Disclosure of trade and other payables [Line Items]
Potential undiscounted amount of future payments	£ 1,910,000,000	£ 2,108,000,000

XML

Bank overdrafts, bonds and bank loans - Bank Overdrafts, Bonds and Bank Loans Amounts Falling Due Within One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of bank overdraft bonds and bank loans [abstract]
Bank overdrafts	£ 393.2	£ 534.3	£ 435.8
Corporate bonds and bank loans	230.9	468.2
Bank overdrafts, bonds and bank loans	£ 624.1	£ 1,002.5

XML

Bank overdrafts, bonds and bank loans - Corporate Bonds and Bank Loans Amounts Falling Due After More Than One Year (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of bank overdraft bonds and bank loans [abstract]
Corporate bonds and bank loans	£ 6,250.4	£ 5,564.9

XML

Bank overdrafts, bonds and bank loans - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of bank overdraft bonds and bank loans [line items]
Carrying amount of bank loans	£ 993.4	£ 272.1
Corporate bond [member]
Disclosure of bank overdraft bonds and bank loans [line items]
Fair value of corporate bonds	£ 5,816.5	£ 6,101.4

XML

Bank overdrafts, bonds and bank loans - Repayments Due on Corporate Bonds, Bank Loans and Overdrafts (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	£ 6,874.5	£ 6,567.4
Within one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	624.1	1,002.5
Between one and two years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	727.6	208.0
Between two and three years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	421.0	717.2
Between three and four years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	1,384.2	195.7
Between four and five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	356.6	660.9
Over five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line items]
Corporate bonds, bank loans and overdrafts	£ 3,361.0	£ 3,783.1

XML

Provisions for liabilities and charges - Summary of Provisions for Liabilities and Charges (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Noncurrent Provisions [line items]
Beginning balance	£ 227.9	£ 183.6
Charged to the income statement	21.0	20.3
Acquisitions	26.8	15.0
Utilised	(27.4)	(32.8)
Released to the income statement	(11.4)	(6.6)
Transfers	7.2	13.0
Exchange adjustments	(15.1)	35.4
Ending balance	229.0	227.9
Property [Member]
Disclosure Of Noncurrent Provisions [line items]
Beginning balance	58.5	52.7
Charged to the income statement	4.1	5.8
Acquisitions	4.0	11.1
Utilised	(6.0)	(14.7)
Released to the income statement	(5.5)	(2.9)
Transfers	0.1	(1.6)
Exchange adjustments	(2.6)	8.1
Ending balance	52.6	58.5
Other [member]
Disclosure Of Noncurrent Provisions [line items]
Beginning balance	169.4	130.9
Charged to the income statement	16.9	14.5
Acquisitions	22.8	3.9
Utilised	(21.4)	(18.1)
Released to the income statement	(5.9)	(3.7)
Transfers	7.1	14.6
Exchange adjustments	(12.5)	27.3
Ending balance	£ 176.4	£ 169.4

XML

Provisions for liabilities and charges - Summary of Provisions for Liabilities and Charges (Parenthetical) (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other provisions [abstract]
Acquisitions provisions from revisions to fair value adjustments	£ 21.9	£ 3.4

XML

Share-based payments - Charges for Share-based Incentive Plans (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of share based payments [Abstract]
Share-based payments (note 5)	£ 105.0	£ 106.5	£ 99.0

XML

Share-based payments - Additional Information (Detail) £ in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£) Employees	Dec. 31, 2016 GBP (£) Employees	Dec. 31, 2015 GBP (£) Employees	Mar. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Number of key executives covered | Employees	134,413	134,341	128,123
Restricted stock plans [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Unrecognised compensation cost	£ 156.0	£ 175.9
Fair value of shares vested	£ 114.8	£ 116.8	£ 111.7
Restricted stock plans [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Unrecognised compensation cost, recognised period	1 year
Restricted stock plans [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Unrecognised compensation cost, recognised period	2 years
Leadership Equity Acquisition Plan III [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Performance period	5 years	5 years	5 years
Executive Performance Share Plan [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Performance period	5 years
Executive Performance Share Plan [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Threshold performance vesting percentage	20.00%
Compound annual growth percentage	7.00%
Average return on equity percentage	10.00%
Compound annual growth percentage	14.00%
Executive Performance Share Plan [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Threshold performance vesting percentage	100.00%
Compound annual growth percentage	14.00%
Average return on equity percentage	14.00%
Compound annual growth percentage	18.00%
Performance Share Awards [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Vesting period	2 years
Leaders, Partners and High Potential Group [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Vesting period		3 years
Number of key executives covered		1,800
Major ordinary share transactions [member] | Leadership Equity Acquisition Plan III [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Vested match number of shares for each investment share				5.0

XML

Share-based payments - Movement on Ordinary Shares Granted for Significant Restricted Stock Plans (Detail) pure in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£)
Leadership Equity Acquisition Plan III [member]
Disclosure of movement on ordinary shares granted for significant restricted stock plans [line items]
Weighted average fair value, Non-vested beginning balance	£ 8.60
Weighted average fair value, Granted	8.60
Weighted average fair value, Vested	£ 8.60
Number of shares, Non-vested beginning balance	0.8
Number of shares, Granted	4.0
Number of shares, Vested	(4.8)
Executive Performance Share Plan [member]
Disclosure of movement on ordinary shares granted for significant restricted stock plans [line items]
Weighted average fair value, Non-vested beginning balance	£ 13.73
Weighted average fair value, Granted	13.09
Weighted average fair value, Lapsed	12.86
Weighted average fair value, Non-vested ending balance	£ 13.68
Number of shares, Non-vested beginning balance	8.0
Number of shares, Granted	2.0
Number of shares, Lapsed	(0.9)
Number of shares, Non-vested ending balance	9.1
Performance Share Awards [member]
Disclosure of movement on ordinary shares granted for significant restricted stock plans [line items]
Weighted average fair value, Non-vested beginning balance	£ 15.96
Weighted average fair value, Granted	16.81
Weighted average fair value, Lapsed	16.48
Weighted average fair value, Vested	15.04
Weighted average fair value, Non-vested ending balance	£ 16.59
Number of shares, Non-vested beginning balance	1.2
Number of shares, Granted	1.2
Number of shares, Lapsed	(0.2)
Number of shares, Vested	(0.3)
Number of shares, Non-vested ending balance	1.9
Leaders, Partners and High Potential Group [member]
Disclosure of movement on ordinary shares granted for significant restricted stock plans [line items]
Weighted average fair value, Non-vested beginning balance	£ 15.34
Weighted average fair value, Granted	12.50
Weighted average fair value, Lapsed	15.18
Weighted average fair value, Vested	12.14
Weighted average fair value, Non-vested ending balance	£ 15.02
Number of shares, Non-vested beginning balance	6.4
Number of shares, Granted	3.1
Number of shares, Lapsed	(0.7)
Number of shares, Vested	(2.0)
Number of shares, Non-vested ending balance	6.8

XML

Provision for post-employment benefits - Pension Costs (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Pension Costs [Abstract]
Defined contribution plans	£ 175.9	£ 153.5	£ 135.0
Defined benefit plans charge to operating profit	16.1	24.6	25.0
Pension costs (note 5)	192.0	178.1	160.0
Net interest expense on pension plans (note 6)	6.3	6.7	7.3
Pension costs, Net	£ 198.3	£ 184.8	£ 167.3

XML

Provision for post-employment benefits - Additional Information (Detail) £ in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£) yr	Dec. 31, 2016 GBP (£) yr	Dec. 31, 2015 GBP (£)
Disclosure of defined benefit plans [line items]
Employer contributions and benefit payments | £	£ 68.2	£ 43.7	£ 70.9
Employer contributions and benefit payments, expected in 2018 | £	£ 70.0
Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	22.4	22.8
Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.0	24.5
Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.8	24.7
Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.7	26.5

XML

Provision for post-employment benefits - Weighted Average Assumptions Used For Actuarial Valuations (Detail)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
United Kingdom [member]
Disclosure of defined benefit plans [line items]
Discount rate	2.40%	2.50%	3.70%	3.40%
Rate of increase in salaries		3.50%	3.10%	3.10%
Rate of increase in pensions in payment	4.10%	4.10%	3.90%	3.90%
Inflation	2.70%	2.80%	2.40%	2.40%
North America [member]
Disclosure of defined benefit plans [line items]
Discount rate	3.50%	3.80%	4.00%	3.70%
Rate of increase in salaries	3.10%	3.10%	3.00%	3.00%
Inflation	4.00%	4.00%	2.50%	2.50%
Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Discount rate	1.90%	1.70%	2.50%	2.10%
Rate of increase in salaries	1.90%	2.00%	2.30%	2.20%
Rate of increase in pensions in payment	1.20%	1.30%	1.60%	2.00%
Inflation	1.70%	1.70%	2.00%	2.00%
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Discount rate	4.20%	4.20%	4.20%	4.20%
Rate of increase in salaries	5.50%	5.90%	5.80%	6.10%
Inflation	4.00%	4.00%	4.00%	3.90%

XML

Provision for post-employment benefits - Life Expectancies For Defined Benefit Pension Plans (Detail) - yr	Dec. 31, 2017	Dec. 31, 2016
Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	22.4	22.8
Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.0	24.5
Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.8	24.7
Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.7	26.5
North America [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	22.1
North America [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.6
North America [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.7
North America [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.2
United Kingdom [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.4
United Kingdom [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.4
United Kingdom [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	25.0
United Kingdom [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	26.2
Western Continental Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	20.8
Western Continental Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.0
Western Continental Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	23.1
Western Continental Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	26.2
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	19.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - current pensioners (at age 65) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.8
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - male [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	19.6
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Years life expectancy after age 65 - future pensioners (current age 45) - female [member]
Disclosure of defined benefit plans [line items]
Actuarial assumption of life expectancy	24.8

XML

Provision for post-employment benefits - Weighted Average Duration of Defined Benefit Pension Obligations and Distribution of Timing of Benefit Payments (Detail) £ in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£) yr
Disclosure of defined benefit plans [line items]
Weighted average duration of the defined benefit obligation (years) | yr	12.5
Within one year [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 65.2
Between one and two years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	61.8
Between two and three years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	61.2
Between three and four years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	62.3
Between four and five years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	61.3
Later than five years and not later than ten years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 302.2
North America [member]
Disclosure of defined benefit plans [line items]
Weighted average duration of the defined benefit obligation (years) | yr	9.2
North America [member] | Within one year [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 35.9
North America [member] | Between one and two years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	33.4
North America [member] | Between two and three years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	32.5
North America [member] | Between three and four years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	32.0
North America [member] | Between four and five years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	31.0
North America [member] | Later than five years and not later than ten years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 132.8
United Kingdom [member]
Disclosure of defined benefit plans [line items]
Weighted average duration of the defined benefit obligation (years) | yr	14.5
United Kingdom [member] | Within one year [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 17.8
United Kingdom [member] | Between one and two years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	17.4
United Kingdom [member] | Between two and three years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	17.8
United Kingdom [member] | Between three and four years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	18.4
United Kingdom [member] | Between four and five years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	18.4
United Kingdom [member] | Later than five years and not later than ten years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 96.3
Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Weighted average duration of the defined benefit obligation (years) | yr	15.7
Western Continental Europe [member] | Within one year [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 8.8
Western Continental Europe [member] | Between one and two years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	8.5
Western Continental Europe [member] | Between two and three years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	8.5
Western Continental Europe [member] | Between three and four years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	8.9
Western Continental Europe [member] | Between four and five years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	9.1
Western Continental Europe [member] | Later than five years and not later than ten years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 51.7
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Weighted average duration of the defined benefit obligation (years) | yr	8.7
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Within one year [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 2.7
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Between one and two years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	2.5
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Between two and three years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	2.4
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Between three and four years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	3.0
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Between four and five years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	2.8
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member] | Later than five years and not later than ten years [member]
Disclosure of defined benefit plans [line items]
Expected benefit payments	£ 21.4

XML

Provision for post-employment benefits - Sensitivity Analysis of Significant Actuarial Assumptions (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Discount rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumption, basis point increase	0.25%	0.25%
Assumption, basis point decrease	0.25%	0.25%
Discount rate [member] | United Kingdom [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	£ (13.1)	£ (13.3)
Increase/(decrease) in benefit obligation, due to decrease in assumption	13.8	14.1
Discount rate [member] | North America [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	(9.9)	(10.9)
Increase/(decrease) in benefit obligation, due to decrease in assumption	10.2	11.2
Discount rate [member] | Western Continental Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	(9.2)	(10.1)
Increase/(decrease) in benefit obligation, due to decrease in assumption	9.8	10.6
Discount rate [member] | Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	(0.6)	(0.6)
Increase/(decrease) in benefit obligation, due to decrease in assumption	£ 0.6	£ 0.6
Rate of increase in salaries [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumption, basis point increase	0.25%	0.25%
Assumption, basis point decrease	0.25%	0.25%
Rate of increase in salaries [member] | United Kingdom [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption		£ 0.2
Increase/(decrease) in benefit obligation, due to decrease in assumption		(0.2)
Rate of increase in salaries [member] | North America [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	£ 0.1
Increase/(decrease) in benefit obligation, due to decrease in assumption	(0.1)
Rate of increase in salaries [member] | Western Continental Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	1.5	1.4
Increase/(decrease) in benefit obligation, due to decrease in assumption	(1.5)	(1.4)
Rate of increase in salaries [member] | Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	0.6	0.6
Increase/(decrease) in benefit obligation, due to decrease in assumption	£ (0.6)	£ (0.6)
Rate of increase in pensions in payment [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumption, basis point increase	0.25%	0.25%
Assumption, basis point decrease	0.25%	0.25%
Rate of increase in pensions in payment [member] | United Kingdom [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	£ 2.4	£ 2.3
Increase/(decrease) in benefit obligation, due to decrease in assumption	(1.9)	(2.3)
Rate of increase in pensions in payment [member] | Western Continental Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	6.2	6.8
Increase/(decrease) in benefit obligation, due to decrease in assumption	£ (5.8)	£ (6.4)
Life expectancy [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumption, increase in longevity	1 year	1 year
Life expectancy [member] | United Kingdom [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	£ 16.9	£ 17.7
Life expectancy [member] | North America [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	6.0	6.2
Life expectancy [member] | Western Continental Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase/(decrease) in benefit obligation, due to increase in assumption	£ 7.0	£ 7.4

XML

Provision for post-employment benefits - Fair Value of Assets and Assessed Present Value of Liabilities in Pension Plans (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [abstract]
Fair value of assets allocation, Equities	13.40%	17.30%	16.30%
Fair value of assets allocation, Bonds	55.90%	60.60%	58.90%
Fair value of assets allocation, Insured annuities	19.20%	6.80%	7.40%
Fair value of assets allocation, Property	0.10%	0.20%	0.20%
Fair value of assets allocation, Cash	1.10%	4.80%	8.00%
Fair value of assets allocation, Other	10.30%	10.30%	9.20%
Total fair value of assets allocation	100.00%	100.00%	100.00%
Fair value of assets, Equities	£ 124.6	£ 161.9	£ 132.5
Fair value of assets, Bonds	520.0	566.0	479.5
Fair value of assets, Insured annuities	178.5	63.5	60.5
Fair value of assets, Property	1.3	1.6	1.5
Fair value of assets, Cash	9.9	44.9	65.1
Fair value of assets, Other	95.7	96.3	75.1
Total fair value of assets	930.0	934.2	814.2
Present value of liabilities	(1,135.4)	(1,209.8)	(1,039.9)
Deficit in the plans	(205.4)	(275.6)	(225.7)
Irrecoverable surplus	(0.9)	(0.9)	(3.6)
Net liability	(206.3)	(276.5)	(229.3)
Plans in surplus	43.9	28.0	31.4
Plans in deficit	£ (250.2)	£ (304.5)	£ (260.7)

XML

Provision for post-employment benefits - Surplus/(Deficit) in Plans by Region (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [line items]
Surplus/(deficit) in plans	£ (205.4)	£ (275.6)	£ (225.7)
United Kingdom [member]
Disclosure of defined benefit plans [line items]
Surplus/(deficit) in plans	31.5	20.0	30.9
North America [member]
Disclosure of defined benefit plans [line items]
Surplus/(deficit) in plans	(89.2)	(133.8)	(123.4)
Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/(deficit) in plans	(107.7)	(116.9)	(97.4)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/(deficit) in plans	£ (40.0)	£ (44.9)	£ (35.8)

XML

Provision for post-employment benefits - Funded and Unfunded Pension Plans By Region (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	£ (205.4)	£ (275.6)	£ (225.7)
Present value of liabilities	(1,135.4)	(1,209.8)	(1,039.9)
United Kingdom [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	31.5	20.0	30.9
North America [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(89.2)	(133.8)	(123.4)
Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(107.7)	(116.9)	(97.4)
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(40.0)	(44.9)	(35.8)
Funded defined benefit plans [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(32.0)	(90.7)	(61.8)
Present value of liabilities	(962.0)	(1,024.9)	(876.0)
Funded defined benefit plans [member] | United Kingdom [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	31.5	20.0	30.9
Present value of liabilities	(387.5)	(406.4)	(352.6)
Funded defined benefit plans [member] | North America [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(21.4)	(56.0)	(45.5)
Present value of liabilities	(385.4)	(420.4)	(364.5)
Funded defined benefit plans [member] | Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(37.9)	(48.9)	(42.3)
Present value of liabilities	(173.3)	(180.9)	(143.9)
Funded defined benefit plans [member] | Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(4.2)	(5.8)	(4.9)
Present value of liabilities	(15.8)	(17.2)	(15.0)
Unfunded defined benefit plans [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(173.4)	(184.9)	(163.9)
Present value of liabilities	(173.4)	(184.9)	(163.9)
Unfunded defined benefit plans [member] | North America [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(67.8)	(77.8)	(77.9)
Present value of liabilities	(67.8)	(77.8)	(77.9)
Unfunded defined benefit plans [member] | Western Continental Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(69.8)	(68.0)	(55.1)
Present value of liabilities	(69.8)	(68.0)	(55.1)
Unfunded defined benefit plans [member] | Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe [member]
Disclosure of defined benefit plans [line items]
Surplus/ (deficit)	(35.8)	(39.1)	(30.9)
Present value of liabilities	£ (35.8)	£ (39.1)	£ (30.9)

XML

Provision for post-employment benefits - Pension Expense Charged to Operating Profit, Amounts Charged to Finance Costs and Amounts Recognised in Consolidated Statement of Comprehensive Income (OCI) (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit (liability) asset
Charge to operating profit	£ 16.1	£ 24.6	£ 25.0
Net interest expense on pension plans	6.3	6.7	7.3
Actuarial gain/(loss) recognised in OCI	17.0	(15.9)	33.5
Post employment pension expense [member]
Disclosure of net defined benefit (liability) asset
Service cost	13.0	22.4	23.0
Administrative expenses	3.1	2.2	2.0
Charge to operating profit	16.1	24.6	25.0
Net interest expense on pension plans	6.3	6.7	7.3
Charge to profit before taxation for defined benefit plans	22.4	31.3	32.3
Return on plan assets (excluding interest income)	13.4	66.3	(31.7)
Changes in demographic assumptions underlying the present value of the plan liabilities	12.7	6.7	13.8
Changes in financial assumptions underlying the present value of the plan liabilities	(17.0)	(92.6)	55.4
Experience gain/(loss) arising on the plan liabilities	7.9	1.0	(1.3)
Change in irrecoverable surplus		2.7	(2.7)
Actuarial gain/(loss) recognised in OCI	£ 17.0	£ (15.9)	£ 33.5

XML

Provision for post-employment benefits - Movement in Pension Plan Liabilities (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit (liability) asset
Plan liabilities at beginning of year	£ 276.5	£ 229.3
Plan liabilities at end of year	206.3	276.5	£ 229.3
Retirement benefit obligation [member]
Disclosure of net defined benefit (liability) asset
Plan liabilities at beginning of year	1,209.8	1,039.9	1,144.8
Service cost	13.0	22.4	23.0
Interest cost	32.9	37.2	34.6
Effect of changes in demographic assumptions	(12.7)	(6.7)	(13.8)
Effect of changes in financial assumptions	17.0	92.6	(55.4)
Effect of experience adjustments	(7.9)	(1.0)	1.3
Benefits paid	(79.7)	(92.4)	(112.6)
(Gain)/loss due to exchange rate movements	(36.4)	124.2	13.4
Settlement payments	(1.2)	(4.8)
Other	0.6	(1.6)	4.6
Plan liabilities at end of year	£ 1,135.4	£ 1,209.8	£ 1,039.9

XML

Provision for post-employment benefits - Movement in Pension Plan Assets (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit (liability) asset
Fair value of plan assets at beginning of year	£ (276.5)	£ (229.3)
Employer contributions	(68.2)	(43.7)	£ (70.9)
Fair value of plan assets at end of year	(206.3)	(276.5)	(229.3)
Plan assets [member]
Disclosure of net defined benefit (liability) asset
Fair value of plan assets at beginning of year	934.2	814.2	849.5
Interest income on plan assets	26.6	30.5	27.3
Return on plan assets (excluding interest income)	13.4	66.3	(31.7)
Employer contributions	68.2	43.7	70.9
Benefits paid	(79.7)	(92.4)	(112.6)
(Loss)/gain due to exchange rate movements	(28.7)	78.8	12.4
Settlement payments	(1.2)	(4.8)
Administrative expenses	(3.1)	(2.2)	(2.0)
Other	0.3	0.1	0.4
Fair value of plan assets at end of year	930.0	934.2	814.2
Actual return on plan assets	£ 40.0	£ 96.8	£ (4.4)

XML

Risk management policies - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 USD ($)
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 6,481.3		£ 6,033.1
Total committed facilities available			7,711.7
Interest rate risk [member]
Disclosure of detailed information about borrowings [line items]
Percentage increase in market interest rate	1.00%	1.00%
Potential amount of change due to an increase or decrease in risk			0.2		4.5
Percentage decrease in market interest rate	1.00%	1.00%
US Dollar bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | $				$ 2,862
US Dollar bonds [member] | Weighted average [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | $				3,741		$ 3,182
US Dollar bonds [member] | Bank Credit Facilities [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | $				$ 3,931		$ 2,862
US Dollar bonds [member] | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 1,146.1		£ 1,255.6
Percentage of debt	39.40%
Borrowings interest rate	4.62%	4.62%	4.62%	4.62%	4.62%	4.62%
Average period of debt	199 months	212 months
US Dollar bonds [member] | Floating interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 1,760.9		£ 1,063.1
Percentage of debt	60.60%
Borrowings interest rate	3.19%		3.19%	3.19%
Average period of debt	29 months
Sterling bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 600.0		1,000.0
Sterling bonds [member] | Weighted average [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			1,242.0		781.0
Sterling bonds [member] | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 600.0		£ 800.0
Percentage of debt	100.00%
Borrowings interest rate	4.04%	4.53%	4.04%	4.04%	4.53%	4.53%
Average period of debt	245 months	193 months
Sterling bonds [member] | Floating interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings					£ 200.0
Eurobonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | €	€ 3,202	€ 2,952
Eurobonds [member] | Weighted average [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | €	€ 3,108	€ 3,132
Eurobonds [member] | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 2,623.9		£ 2,521.9
Percentage of debt	92.20%
Borrowings interest rate	1.85%	1.85%	1.85%	1.85%	1.85%	1.85%
Average period of debt	80 months	93 months
Eurobonds [member] | Floating interest rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings			£ 222.2
Percentage of debt	7.80%
Borrowings interest rate	0.00%		0.00%	0.00%
Average period of debt	29 months

XML

Risk management policies - Committed Facilities (Detail) € in Millions, £ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 AUD ($)	Dec. 31, 2016 GBP (£)
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 7,711.7
Drawn down facilities		6,547.9
Undrawn committed credit facilities		1,163.8			£ 2,122.3
Sterling bonds due September 2046 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 400.0
Interest rate	2.875%	2.875%	2.875%	2.875%
US$ bonds due November 2043 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 369.7	$ 500
Interest rate	5.625%	5.625%	5.625%	5.625%
US$ bonds maturing September 2042 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 221.8	$ 300
Interest rate	5.125%	5.125%	5.125%	5.125%
Euro bonds due March 2030 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available	€ 600	£ 533.3
Interest rate	1.625%	1.625%	1.625%	1.625%
Euro bonds due September 2026 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available	€ 750	£ 666.7
Interest rate	2.25%	2.25%	2.25%	2.25%
US$ bonds due September 2024 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 554.6	$ 750
Interest rate	3.75%	3.75%	3.75%	3.75%
Euro bonds due November 2023 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available	€ 750	£ 666.7
Interest rate	3.00%	3.00%	3.00%	3.00%
US$ bonds due September 2022 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 369.7	$ 500
Interest rate	3.625%	3.625%	3.625%	3.625%
US$ bonds due November 2021 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 600.7	$ 812
Interest rate	4.75%	4.75%	4.75%	4.75%
US revolving credit facilities [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 1,848.6	$ 2,500
Sterling bonds due November 2020 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 200.0
Interest rate	6.375%	6.375%	6.375%	6.375%
Eurobonds (3m EURIBOR + 0.32%) due May 2020 [member]
Disclosure of detailed information about borrowings [line items]
Adjustment to floating basis	0.32%	0.32%	0.32%	0.32%
Floating basis	3m EURIBOR
Total committed facilities available	€ 250	£ 222.2
Euro bonds due November 2019 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available	€ 600	£ 533.3
Interest rate	0.75%	0.75%	0.75%	0.75%
Australian New Zealand revolving credit facilities [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 300.4		$ 520
Euro bonds due March 2018 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available	€ 252	£ 224.0
Interest rate	0.43%	0.43%	0.43%	0.43%
Within one year [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 224.0
Drawn down facilities		224.0
Within one year [member] | Euro bonds due March 2018 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		224.0
Between one and two years [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		833.7
Drawn down facilities		729.1
Between one and two years [member] | Euro bonds due November 2019 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		533.3
Between one and two years [member] | Australian New Zealand revolving credit facilities [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		300.4
Between two and three years [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		422.2
Drawn down facilities		422.2
Between two and three years [member] | Sterling bonds due November 2020 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		200.0
Between two and three years [member] | Eurobonds (3m EURIBOR + 0.32%) due May 2020 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		222.2
Between three and four years [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		2,449.3
Drawn down facilities		1,390.1
Between three and four years [member] | US$ bonds due November 2021 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		600.7
Between three and four years [member] | US revolving credit facilities [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		1,848.6
Later than four years [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		3,782.5
Drawn down facilities		3,782.5
Later than four years [member] | Sterling bonds due September 2046 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		400.0
Later than four years [member] | US$ bonds due November 2043 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		369.7
Later than four years [member] | US$ bonds maturing September 2042 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		221.8
Later than four years [member] | Euro bonds due March 2030 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		533.3
Later than four years [member] | Euro bonds due September 2026 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		666.7
Later than four years [member] | US$ bonds due September 2024 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		554.6
Later than four years [member] | Euro bonds due November 2023 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		666.7
Later than four years [member] | US$ bonds due September 2022 [member]
Disclosure of detailed information about borrowings [line items]
Total committed facilities available		£ 369.7

XML

Financial instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£)	Dec. 31, 2016 GBP (£)	Dec. 31, 2015 GBP (£)	Dec. 31, 2017 USD ($)
Disclosure of detailed information about financial instruments [line items]
Nominal amount	£ 7,711,700,000
Derivative assets	3,100,000	£ 23,000,000
Derivative liabilities	£ 6,800,000	£ 5,900,000
Weighted average growth rate	25.00%	25.00%		25.00%
Risk adjusted discount rate	1.80%	1.50%		1.80%
0.5 percentage point increase or decrease [member]
Disclosure of detailed information about financial instruments [line items]
Increase in combined liabilities due to earn out and put option arrangement	£ 11,200,000	£ 16,000,000
Decrease in combined liabilities due to earn out and put option arrangement	11,400,000	16,400,000
One percentage point increase or decrease [member]
Disclosure of detailed information about financial instruments [line items]
Increase in combined liabilities due to earn out and put option arrangement	8,900,000	13,400,000
Decrease in combined liabilities due to earn out and put option arrangement	9,300,000	17,900,000
Foreign Exchange Contracts [member] | Derivatives not designated as hedges [member]
Disclosure of detailed information about financial instruments [line items]
Nominal amount	177,700,000	122,000,000
Fair value estimated to be a net asset (liability)	(2,500,000)	100,000
Interest Rate Swap Contract [member]
Disclosure of detailed information about financial instruments [line items]
Fair value estimated to be a net asset (liability)	(1,200,000)	17,000,000
Derivative assets	2,100,000	20,000,000
Derivative liabilities	3,300,000	3,000,000
Gain (loss) on changes in the fair value relating to the ineffective portion	2,800,000	£ (5,200,000)	£ (6,800,000)
Gain (loss) on changes in the fair value relating to the ineffective portion, loss on hedging instruments	9,900,000
Gain (loss) on changes in the fair value relating to the ineffective portion, gain on hedged items	£ 12,700,000
Interest Rate Swap Contract [member] | Until September 2022 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal amount | $				$ 500,000,000
Interest Rate Swap Contract [member] | Until November 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Nominal amount | $				$ 812,000,000
Interest Rate Swap Contract [member] | Fixed interest rate [member] | Until September 2022 [member]
Disclosure of detailed information about financial instruments [line items]
Derivative interest rates	3.63%
Interest Rate Swap Contract [member] | Fixed interest rate [member] | Until November 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Derivative interest rates	4.75%
Interest Rate Swap Contract [member] | Floating interest rate [member] | Until September 2022 [member]
Disclosure of detailed information about financial instruments [line items]
Derivative interest rates, LIBOR adjustment	1.52%
Interest Rate Swap Contract [member] | Floating interest rate [member] | Until November 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Derivative interest rates, LIBOR adjustment	2.34%

XML

Financial instruments - Analysis of Financial Assets and Liabilities (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about financial instruments [line items]
Other investments	£ 1,153.5	£ 1,310.3	£ 1,158.7
Cash and short-term deposits	2,391.4	2,436.9
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other receivables: amounts falling due within one year	8,328.4	8,468.8
Trade and other receivables: amounts falling due after more than one year	61.7	89.9
Trade and other payables: amounts falling due within one year	(9,970.5)	(10,398.9)
Trade and other payables: amounts falling due after more than one year	(8.5)	(8.4)
Derivative assets	3.1	23.0
Derivative liabilities	(6.8)	(5.9)
Payments due to vendors (earnout agreements) (note 19)	(630.7)	(976.5)	£ (581.3)
Liabilities in respect of put options	(258.1)	(297.0)
Financial instruments	(5,811.0)	(5,925.2)
Derivatives in designated hedge relationships [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	2.1	20.0
Derivative liabilities	(3.3)	(3.0)
Financial instruments	(1.2)	17.0
Held for trading [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	1.0	3.0
Derivative liabilities	(3.5)	(2.9)
Payments due to vendors (earnout agreements) (note 19)	(630.7)	(976.5)
Liabilities in respect of put options	(258.1)	(297.0)
Financial instruments	(891.3)	(1,273.4)
Loans & receivables [member]
Disclosure of detailed information about financial instruments [line items]
Cash and short-term deposits	2,391.4	2,436.9
Trade and other receivables: amounts falling due within one year	8,328.4	8,468.8
Trade and other receivables: amounts falling due after more than one year	61.7	89.9
Financial instruments	10,781.5	10,995.6
Available for sale [member]
Disclosure of detailed information about financial instruments [line items]
Other investments	1,153.5	1,310.3
Financial instruments	1,153.5	1,310.3
Amortised cost [member]
Disclosure of detailed information about financial instruments [line items]
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables: amounts falling due within one year	(9,970.5)	(10,398.9)
Trade and other payables: amounts falling due after more than one year	(8.5)	(8.4)
Financial instruments	£ (16,853.5)	£ (16,974.7)

XML

Financial instruments - Analysis of Financial Instruments Measured at Fair Value (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about financial instruments [line items]
Beginning balance	£ 1,310.3	£ 1,158.7
Derivative assets	3.1	23.0
Derivative liabilities	6.8	5.9
Payments due to vendors (earnout agreements) (note 19)	630.7	976.5	£ 581.3
Liabilities in respect of put options	(258.1)	(297.0)
Ending balance	1,153.5	1,310.3
Derivatives in designated hedge relationships [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	2.1	20.0
Derivative liabilities	3.3	3.0
Held for trading [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	1.0	3.0
Derivative liabilities	3.5	2.9
Payments due to vendors (earnout agreements) (note 19)	630.7	976.5
Liabilities in respect of put options	(258.1)	(297.0)
Available for sale [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	1,310.3
Ending balance	1,153.5	1,310.3
At Fair Value [member] | Level 1 [member] | Available for sale [member] | Other Investments [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	429.3
Ending balance	333.2	429.3
At Fair Value [member] | Level 2 [member] | Derivatives in designated hedge relationships [member] | Derivatives Liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Derivative liabilities	(3.3)	(3.0)
At Fair Value [member] | Level 2 [member] | Derivatives in designated hedge relationships [member] | Derivatives Assets [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	2.1	20.0
At Fair Value [member] | Level 2 [member] | Held for trading [member] | Derivatives Liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Derivative liabilities	3.5	2.9
At Fair Value [member] | Level 2 [member] | Held for trading [member] | Derivatives Assets [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets	1.0	3.0
At Fair Value [member] | Level 3 [member] | Held for trading [member] | Trade And Other Payables To Trade Suppliers [member]
Disclosure of detailed information about financial instruments [line items]
Payments due to vendors (earnout agreements) (note 19)	(630.7)	(976.5)
At Fair Value [member] | Level 3 [member] | Held for trading [member] | Liabilities in Respect of Put Options [member]
Disclosure of detailed information about financial instruments [line items]
Liabilities in respect of put options	(258.1)	(297.0)
Beginning balance	(297.0)	(234.4)
Gains/(losses) recognised in the income statement	52.5	(17.2)
Exchange adjustments	7.5	(47.4)
Additions	(40.5)	(42.9)
Cancellations	2.9
Settlements	16.5	44.9
Ending balance	(258.1)	(297.0)
At Fair Value [member] | Level 3 [member] | Available for sale [member] | Other Investments [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	881.0	847.3
Gains/(losses) recognised in the income statement	(13.8)	(1.6)
Gains/(losses) recognised in other comprehensive income	15.1	(105.6)
Exchange adjustments	(70.9)	112.9
Additions	67.7	105.7
Disposals	(1.7)	(3.4)
Reclassifications from other investments to interests in associates	(57.1)	(74.3)
Ending balance	£ 820.3	£ 881.0

XML

Authorised and issued share capital - Summary of Authorised and Issued Share Capital (Detail) £ in Millions	12 Months Ended
	Dec. 31, 2017 GBP (£) shares	Dec. 31, 2016 GBP (£) shares	Dec. 31, 2015 GBP (£) shares	Dec. 31, 2014 GBP (£) shares
Disclosure of classes of share capital [line items]
Issued and fully paid capital, Beginning balance	£ 133.2
Issued and fully paid capital, Ending balance	£ 133.3	£ 133.2
Ordinary shares [member]
Disclosure of classes of share capital [line items]
Equity ordinary shares, authorised | shares	1,750,000,000	1,750,000,000	1,750,000,000	1,750,000,000
Nominal value of Authorised shares	£ 175.0	£ 175.0	£ 175.0	£ 175.0
Number of shares issued and fully paid, Beginning balance | shares	1,331,880,730	1,329,366,024	1,325,747,724
Exercise of share options | shares	630,822	2,514,706	3,618,300
Number of shares issued and fully paid, Ending balance | shares	1,332,511,552	1,331,880,730	1,329,366,024
Issued and fully paid capital, Beginning balance	£ 133.2	£ 132.9	£ 132.6
Exercise of share options	0.1	0.3	0.3
Issued and fully paid capital, Ending balance	£ 133.3	£ 133.2	£ 132.9

XML

Authorised and issued share capital - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£) shares ADRs Years	Dec. 31, 2017 USD ($) Years	Dec. 31, 2016 GBP (£) shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 GBP (£)	Dec. 31, 2015 USD ($)
Disclosure of classes of share capital [line items]
Share option granted in Life | Years	10	10
Share option performance effect	Nine years and eight months	Nine years and eight months
WPP Share Option Plan 2015 [Member] | Bottom of range [member]
Disclosure of classes of share capital [line items]
Threshold period for employment participation in employee stock ownership plan	2 years	2 years
WPP Worldwide Share Ownership Program [member]
Disclosure of classes of share capital [line items]
Vesting period			3 years	3 years
WPP Worldwide Share Ownership Program [member] | Bottom of range [member]
Disclosure of classes of share capital [line items]
Threshold period for employment participation in employee stock ownership plan			2 years	2 years
Executive Stock Option Plan [member]
Disclosure of classes of share capital [line items]
Vesting period			3 years	3 years
Ordinary shares [member]
Disclosure of classes of share capital [line items]
Number of the ordinary shares of the Company held by the ESOP	14,232,910		13,857,706
Market value of the ordinary shares of the Company held by the ESOP | £	£ 190,900,000		£ 251,700,000
Number of ordinary shares held in treasury	62,578,938		51,026,358
Ordinary shares held in Treasury at market value | £	£ 839,200,000		£ 926,600,000
Number of ordinary shares under option	20,985,441		18,092,218
Average share price | £	£ 15.86		£ 16.45		£ 14.74
Ordinary shares [member] | WPP Worldwide Share Ownership Program1[member]
Disclosure of classes of share capital [line items]
Number of ordinary shares under option	3,603,430
Ordinary shares [member] | WPP Share Option Plan 2015 [Member]
Disclosure of classes of share capital [line items]
Number of ordinary shares under option	9,394,600
Ordinary shares [member] | WPP Worldwide Share Ownership Program [member]
Disclosure of classes of share capital [line items]
Number of ordinary shares under option	6,375,750		7,809,917
Ordinary shares [member] | Wpp Executive Share Option Scheme [member]
Disclosure of classes of share capital [line items]
Number of ordinary shares under option	6,741
American depository receipts [member]
Disclosure of classes of share capital [line items]
Average ADR Price | $		$ 101.86		$ 111.20		$ 112.88
American depository receipts [member] | WPP Worldwide Share Ownership Program1[member]
Disclosure of classes of share capital [line items]
Unexercised options | ADRs	554,464
American depository receipts [member] | WPP Share Option Plan 2015 [Member]
Disclosure of classes of share capital [line items]
Unexercised options | ADRs	1,041,670
Share purchase options [member]
Disclosure of classes of share capital [line items]
Unrecognised compensation cost related to share options | £	£ 9,000,000		£ 9,900,000
Unrecognised compensation cost related to share options, weighted average period	20 months	20 months	20 months	20 months

XML

Authorised and issued share capital - Options Granted, WPP Executive Share Option Scheme (Detail) - Ordinary shares [member]	12 Months Ended
	Dec. 31, 2017 GBP (£) shares	Dec. 31, 2016
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	20,985,441	18,092,218
WPP Executive Share Option Scheme [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	6,741	8,851
WPP Executive Share Option Scheme [member] | Exercise price group 1 [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	3,696
Exercise price per share | £	£ 8.333
Exercise dates	2015 - 2022
WPP Executive Share Option Scheme [member] | Exercise price group 2 [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	3,045
Exercise price per share | £	£ 10.595
Exercise dates	2016 - 2023

XML

Authorised and issued share capital - Options Granted, WPP Worldwide Share Ownership Program (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£) shares ADRs	Dec. 31, 2017 USD ($) shares ADRs	Dec. 31, 2016
Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	20,985,441	20,985,441	18,092,218
WPP Worldwide Share Ownership Program [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	6,375,750	6,375,750	7,809,917
WPP Worldwide Share Ownership Program [member] | Exercise price group 1 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	2,125	2,125
Exercise price per share | £	£ 4.819
Exercise dates	2011 - 2018
WPP Worldwide Share Ownership Program [member] | Exercise price group 1 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	14,850	14,850
Exercise price per ADR | $		$ 44.560
Exercise dates	2012 - 2019
WPP Worldwide Share Ownership Program [member] | Exercise price group 2 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	35,550	35,550
Exercise price per share | £	£ 5.483
Exercise dates	2012 - 2019
WPP Worldwide Share Ownership Program [member] | Exercise price group 2 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	34,705	34,705
Exercise price per ADR | $		$ 49.230
Exercise dates	2014 - 2021
WPP Worldwide Share Ownership Program [member] | Exercise price group 3 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	20,500	20,500
Exercise price per share | £	£ 5.483
Exercise dates	2013 - 2019
WPP Worldwide Share Ownership Program [member] | Exercise price group 3 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	22,840	22,840
Exercise price per ADR | $		$ 56.560
Exercise dates	2013 - 2020
WPP Worldwide Share Ownership Program [member] | Exercise price group 4 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	1,125	1,125
Exercise price per share | £	£ 5.608
Exercise dates	2012 - 2019
WPP Worldwide Share Ownership Program [member] | Exercise price group 4 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	6,550	6,550
Exercise price per ADR | $		$ 59.500
Exercise dates	2011 - 2018
WPP Worldwide Share Ownership Program [member] | Exercise price group 5 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	500	500
Exercise price per share | £	£ 5.917
Exercise dates	2011 - 2018
WPP Worldwide Share Ownership Program [member] | Exercise price group 5 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	53,719	53,719
Exercise price per ADR | $		$ 67.490
Exercise dates	2015 - 2022
WPP Worldwide Share Ownership Program [member] | Exercise price group 6 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	15,275	15,275
Exercise price per share | £	£ 6.028
Exercise dates	2011 - 2018
WPP Worldwide Share Ownership Program [member] | Exercise price group 6 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	229,842	229,842
Exercise price per ADR | $		$ 102.670
Exercise dates	2017 - 2024
WPP Worldwide Share Ownership Program [member] | Exercise price group 7 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	6,125	6,125
Exercise price per share | £	£ 6.268
Exercise dates	2014 - 2018
WPP Worldwide Share Ownership Program [member] | Exercise price group 7 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	191,958	191,958
Exercise price per ADR | $		$ 110.760
Exercise dates	2016 - 2023
WPP Worldwide Share Ownership Program [member] | Exercise price group 8 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	116,525	116,525
Exercise price per share | £	£ 6.268
Exercise dates	2014 - 2021
WPP Worldwide Share Ownership Program [member] | Exercise price group 9 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	48,250	48,250
Exercise price per share | £	£ 6.268
Exercise dates	2015 - 2021
WPP Worldwide Share Ownership Program [member] | Exercise price group 10 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	74,500	74,500
Exercise price per share | £	£ 7.113
Exercise dates	2013 - 2020
WPP Worldwide Share Ownership Program [member] | Exercise price group 11 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	32,500	32,500
Exercise price per share | £	£ 7.113
Exercise dates	2014 - 2020
WPP Worldwide Share Ownership Program [member] | Exercise price group 12 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	3,000	3,000
Exercise price per share | £	£ 7.543
Exercise dates	2014 - 2020
WPP Worldwide Share Ownership Program [member] | Exercise price group 13 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	272,579	272,579
Exercise price per share | £	£ 8.458
Exercise dates	2015 - 2022
WPP Worldwide Share Ownership Program [member] | Exercise price group 14 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	67,625	67,625
Exercise price per share | £	£ 13.145
Exercise dates	2017 - 2021
WPP Worldwide Share Ownership Program [member] | Exercise price group 15 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	2,178,454	2,178,454
Exercise price per share | £	£ 13.145
Exercise dates	2017 - 2024
WPP Worldwide Share Ownership Program [member] | Exercise price group 16 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	5,125	5,125
Exercise price per share | £	£ 13.145
Exercise dates	2018 - 2024
WPP Worldwide Share Ownership Program [member] | Exercise price group 17 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	703,172	703,172
Exercise price per share | £	£ 13.505
Exercise dates	2016 - 2023
WPP Worldwide Share Ownership Program [member] | Exercise price group 18 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option | shares	20,500	20,500
Exercise price per share | £	£ 13.505
Exercise dates	2017 - 2023

XML

Authorised and issued share capital - Options Granted, WPP Share Option Plan 2015 (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£) shares ADRs	Dec. 31, 2017 USD ($) shares ADRs	Dec. 31, 2016
Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	20,985,441	20,985,441	18,092,218
WPP Share Option Plan 2015 [Member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	9,394,600	9,394,600
WPP Share Option Plan 2015 [Member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	1,041,670	1,041,670
WPP Share Option Plan 2015 [Member] | Exercise price group 1 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	20,500	20,500
Exercise price per share | £	£ 13.085
Exercise dates	2020 - 2024
WPP Share Option Plan 2015 [Member] | Exercise price group 1 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	430,760	430,760
Exercise price per ADR | $		$ 88.260
Exercise dates	2020 - 2027
WPP Share Option Plan 2015 [Member] | Exercise price group 2 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	3,767,125	3,767,125
Exercise price per share | £	£ 13.085
Exercise dates	2020 - 2027
WPP Share Option Plan 2015 [Member] | Exercise price group 2 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	343,560	343,560
Exercise price per ADR | $		$ 105.490
Exercise dates	2020 - 2026
WPP Share Option Plan 2015 [Member] | Exercise price group 3 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	93,250	93,250
Exercise price per share | £	£ 15.150
Exercise dates	2018 - 2022
WPP Share Option Plan 2015 [Member] | Exercise price group 3 [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ADRs under option | ADRs	267,350	267,350
Exercise price per ADR | $		$ 115.940
Exercise dates	2018 - 2025
WPP Share Option Plan 2015 [Member] | Exercise price group 4 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	2,489,900	2,489,900
Exercise price per share | £	£ 15.150
Exercise dates	2018 - 2025
WPP Share Option Plan 2015 [Member] | Exercise price group 5 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	6,500	6,500
Exercise price per share | £	£ 15.150
Exercise dates	2019 - 2025
WPP Share Option Plan 2015 [Member] | Exercise price group 6 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	17,250	17,250
Exercise price per share | £	£ 17.055
Exercise dates	2019 - 2023
WPP Share Option Plan 2015 [Member] | Exercise price group 7 [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of ordinary shares under option	3,000,075	3,000,075
Exercise price per share | £	£ 17.055
Exercise dates	2019 - 2026

XML

Authorised and issued share capital - Movements and Weighted-average Exercise Price for Options Granted (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 GBP (£) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 shares	Dec. 31, 2017 USD ($)
American depository receipts [member] | WPP Executive Share Option Scheme [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Weighted-average exercise price for options, 1 January | $		$ 59.170
Weighted-average exercise price for options, Exercised | $		59.170
Weighted-average exercise price for options, Outstanding 31 December | $				$ 59.170
American depository receipts [member] | WPP Worldwide Share Ownership Program [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Weighted-average exercise price for options, 1 January | $		93.131
Weighted-average exercise price for options, Exercised | $		57.808
Weighted-average exercise price for options, Lapsed | $		98.281
Weighted-average exercise price for options, Outstanding 31 December | $		94.752		93.131
Weighted-average exercise price for options, Exercisable | $						$ 94.752
American depository receipts [member] | WPP Share Option Plans [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Weighted-average exercise price for options, 1 January | $		109.998
Weighted-average exercise price for options, Granted | $		88.260
Weighted-average exercise price for options, Lapsed | $		109.612
Weighted-average exercise price for options, Outstanding 31 December | $		$ 101.047		$ 109.998
Ordinary shares [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Options granted, Beginning balance	18,092,218	18,092,218
Options granted, Granted	5,960,775	5,960,775
Options granted, Exercised | shares	(630,822)	(630,822)	(2,514,706)	(2,514,706)	(3,618,300)
Options granted, Lapsed	(2,436,730)	(2,436,730)
Options granted, Ending balance	20,985,441	20,985,441	18,092,218	18,092,218
Options granted, Exercisable	6,377,366					6,377,366
Ordinary shares [member] | WPP Executive Share Option Scheme [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Options granted, Beginning balance	8,851	8,851
Options granted, Exercised	(2,110)	(2,110)
Options granted, Ending balance	6,741	6,741	8,851	8,851
Options granted, Exercisable	6,741					6,741
Weighted-average exercise price for options, 1 January | £	£ 9.355
Weighted-average exercise price for options, Outstanding 31 December | £	9.355		£ 9.355
Weighted-average exercise price for options, Exercisable | £	£ 9.355
Ordinary shares [member] | WPP Worldwide Share Ownership Program [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Options granted, Beginning balance	7,809,917	7,809,917
Options granted, Exercised	(620,387)	(620,387)
Options granted, Lapsed	(813,780)	(813,780)
Options granted, Ending balance	6,375,750	6,375,750	7,809,917	7,809,917
Options granted, Exercisable	6,370,625					6,370,625
Weighted-average exercise price for options, 1 January | £	£ 12.059
Weighted-average exercise price for options, Exercised | £	10.428
Weighted-average exercise price for options, Lapsed | £	12.592
Weighted-average exercise price for options, Outstanding 31 December | £	12.195		£ 12.059
Weighted-average exercise price for options, Exercisable | £	£ 12.194
Ordinary shares [member] | WPP Executive Share Option New Scheme [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Options granted, Beginning balance	10,273,450	10,273,450
Options granted, Granted	5,960,775	5,960,775
Options granted, Exercised	(8,325)	(8,325)
Options granted, Lapsed	(1,622,950)	(1,622,950)
Options granted, Ending balance	14,602,950	14,602,950	10,273,450	10,273,450
Weighted-average exercise price for options, 1 January | £	£ 16.192
Weighted-average exercise price for options, Granted | £	13.085
Weighted-average exercise price for options, Lapsed | £	16.244
Weighted-average exercise price for options, Outstanding 31 December | £	£ 14.929		£ 16.192

XML

Authorised and issued share capital - Range of Exercise Prices of Options (Detail)	Dec. 31, 2017 GBP (£) Months	Dec. 31, 2017 USD ($) Months
Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Weighted average contractual life | Months	99	99
American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Weighted average contractual life | Months	96	96
Bottom of range [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | £	£ 4.819
Bottom of range [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | $		$ 44.560
Top of range [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | £	17.055
Top of range [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | $		115.940
Weighted average [member] | Ordinary shares [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | £	£ 14.169
Weighted average [member] | American depository receipts [member]
Disclosure of range of exercise prices of outstanding share options [line items]
Exercise price | $		$ 98.860

XML

Authorised and issued share capital - Weighted Average Fair Value of Options Granted and Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2017 GBP (£)	Dec. 31, 2016 GBP (£)	Dec. 31, 2015 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Weighted average assumptions:
Expected life (months)	48 months	48 months	48 months
Expected volatility	17.00%	16.00%	17.00%
Dividend yield	2.90%	2.80%	2.80%
United Kingdom [member]
Weighted average assumptions:
Risk-free interest rate	0.57%	0.44%	1.04%
United Kingdom [member] | Ordinary shares [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Fair value of options | £	£ 1.12	£ 1.35	£ 1.44
United States [member]
Weighted average assumptions:
Risk-free interest rate	2.05%	1.60%	1.45%
United States [member] | American depository receipts [member]
Disclosure of terms and conditions of share-based payment arrangement [Line items]
Fair value of options | $				$ 9.40	$ 9.94	$ 11.34

XML

Other reserves - Summary of Other Reserves (Detail) - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of reserves within equity [line items]
Beginning balance		£ 1,185.2
Exchange adjustments on foreign currency net investments		(465.2)	£ 1,378.0	£ (275.9)
Gain (loss) on revaluation of available for sale investments		32.1	(93.1)	206.0
Recognition and re measurement of financial instruments		(21.8)	4.9	(59.7)
Share purchases - close period commitments			8.6	82.9
Ending balance		761.7	1,185.2
Capital redemption reserve [member]
Disclosure of reserves within equity [line items]
Beginning balance		2.7	2.7	2.7
Ending balance		2.7	2.7	2.7
Reserve of gains and losses from investments in equity instruments [member]
Disclosure of reserves within equity [line items]
Beginning balance		(247.1)	(225.2)	(246.2)
Recognition and remeasurement of financial instruments		(10.1)	(21.9)	(59.0)
Share purchases - close period commitments				80.0
Ending balance		(257.2)	(247.1)	(225.2)
Revaluation reserve [member]
Disclosure of reserves within equity [line items]
Beginning balance		271.3	364.4	158.4
Gain (loss) on revaluation of available for sale investments		32.1	(93.1)	206.0
Ending balance		303.4	271.3	364.4
Translation reserve [member]
Disclosure of reserves within equity [line items]
Beginning balance		1,158.3	(151.6)	121.3
Exchange adjustments on foreign currency net investments		(445.5)	1,309.9	(272.9)
Ending balance		712.8	1,158.3	(151.6)
Other reserves [member]
Disclosure of reserves within equity [line items]
Beginning balance		1,185.2	(9.7)	36.2
Exchange adjustments on foreign currency net investments	[1]	(445.5)	1,309.9	(272.9)
Gain (loss) on revaluation of available for sale investments	[1]	32.1	(93.1)	206.0
Recognition and re measurement of financial instruments	[1]	(10.1)	(21.9)	(59.0)
Share purchases - close period commitments	[1]			80.0
Ending balance		£ 761.7	£ 1,185.2	£ (9.7)

[1] Other reserves are analysed in note 27.

XML

Acquisitions - Book Values of Identifiable Assets and Liabilities Acquired and Their Fair Value (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Book value [member]
Disclosure of detailed information about business combination [line items]
Intangible assets	£ 0.8	£ 10.5	£ 2.4
Property, plant and equipment	5.5	20.6	21.1
Cash	28.9	57.1	57.7
Trade receivables due within one year	74.4	249.5	115.4
Other current assets	20.1	78.0	75.1
Total assets	129.7	415.7	271.7
Current liabilities	(76.0)	(299.4)	(207.9)
Trade and other payables due after one year	(10.2)	(40.4)	(16.8)
Provisions	(0.1)	(0.1)	(3.3)
Bank loans		(144.4)
Total liabilities	(86.3)	(484.3)	(228.0)
Net assets	43.4	(68.6)	43.7
Fair value adjustments [member]
Disclosure of detailed information about business combination [line items]
Intangible assets	79.0	319.1	230.7
Total assets	79.0	319.1	230.7
Current liabilities		(2.8)
Trade and other payables due after one year	(20.5)	(59.5)	(49.5)
Deferred tax liabilities	(16.8)	(96.1)	(70.3)
Provisions	(4.8)	(11.5)	(7.7)
Total liabilities	(42.1)	(169.9)	(127.5)
Net assets	36.9	149.2	103.2
At Fair Value [member]
Disclosure of detailed information about business combination [line items]
Intangible assets	79.8	329.6	233.1
Property, plant and equipment	5.5	20.6	21.1
Cash	28.9	57.1	57.7
Trade receivables due within one year	74.4	249.5	115.4
Other current assets	20.1	78.0	75.1
Total assets	208.7	734.8	502.4
Current liabilities	(76.0)	(302.2)	(207.9)
Trade and other payables due after one year	(30.7)	(99.9)	(66.3)
Deferred tax liabilities	(16.8)	(96.1)	(70.3)
Provisions	(4.9)	(11.6)	(11.0)
Bank loans		(144.4)
Total liabilities	(128.4)	(654.2)	(355.5)
Net assets	80.3	80.6	146.9
Non-controlling interests	(13.9)	(15.0)	(47.2)
Fair value of equity stake in associate undertakings before acquisition of controlling interest	(5.7)	(98.5)	(208.6)
Goodwill	314.3	799.3	778.9
Consideration	375.0	766.4	670.0
Consideration satisfied by:
Cash	213.7	423.3	411.6
Payments due to vendors	£ 161.3	£ 343.1	£ 258.4

XML

Acquisitions - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about business combination [abstract]
Goodwill that is expected to be deductible for tax purposes	£ 63.9	£ 54.8	£ 27.8

XML

Principal subsidiary undertakings - Summary of Principal Subsidiary Undertakings (Detail)	12 Months Ended
	Dec. 31, 2017
Grey Global Group LLC [member]
Disclosure of subsidiaries [line items]
Country of incorporation	US
J. Walter Thompson Company LLC [member]
Disclosure of subsidiaries [line items]
Country of incorporation	US
GroupM Worldwide LLC [member]
Disclosure of subsidiaries [line items]
Country of incorporation	US
The Ogilvy Group LLC [member]
Disclosure of subsidiaries [line items]
Country of incorporation	US
Young & Rubicam LLC [member]
Disclosure of subsidiaries [line items]
Country of incorporation	US
TNS Group Holdings LTD [member]
Disclosure of subsidiaries [line items]
Country of incorporation	UK

XML

Principal subsidiary undertakings - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Disclosure of subsidiaries [abstract]
Subsidiaries, Percentage owned by group	100.00%

XML

Reconciliation of profit before interest and taxation to headline PBIT - Summary of Reconciliation of Profit Before Interest and Taxation to Headline PBIT (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of reconciliation of profit before interest and taxation [Abstract]
Profit before interest and taxation	£ 2,021.7	£ 2,112.9	[1]	£ 1,679.0	[1]
Amortisation and impairment of acquired intangible assets	195.1	168.4		140.1
Goodwill impairment	27.1	27.0		15.1
Gains on disposal of investments and subsidiaries	(129.0)	(44.3)		(131.0)
Losses/(gains) on remeasurement of equity interests arising from a change in scope of ownership	0.3	(232.4)		(165.0)
Investment write-downs	95.9	86.1		78.7
Restructuring costs	56.8	27.4		106.2
IT asset write-downs				29.1
Share of exceptional (gains)/losses of associates	(0.8)	15.2		21.8
Headline PBIT	£ 2,267.1	£ 2,160.3		£ 1,774.0

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 USD ($)
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Ownership percentage in subsidiaries	100.00%
US$ bonds due September 2022 [member]
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Bond amount	$ 500,000,000
Interest rate	3.625%
US$ bonds maturing September 2042 [member]
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Bond amount	$ 300,000,000
Interest rate	5.125%
US$ bonds due November 2021 [member]
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Bond amount	$ 812,000,000
Interest rate	4.75%

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors - Condensed Consolidating Income Statement (Detail) - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of condensed consolidating income statement information [line items]
Revenue		£ 15,265.4	£ 14,388.9	[1]	£ 12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,267.0)	(977.7)	[1]	(894.1)	[1]
Operating profit		1,908.2	2,063.1	[1]	1,632.0	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit before interest and taxation		2,021.7	2,112.9	[1]	1,679.0	[1]
Finance income		95.2	80.4	[1]	72.4	[1]
Finance costs		(269.8)	(254.5)	[1]	(224.1)	[1]
Revaluation of financial instruments		262.2	(48.3)	[1]	(34.7)	[1]
Profit before taxation		2,109.3	1,890.5	[1]	1,492.6	[1]
Taxation		(197.0)	(388.9)	[1]	(247.5)	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
Revenue		15,265.4	14,388.9	[1]	12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,267.0)	(977.7)	[1]	(894.1)	[1]
Operating profit		1,908.2	2,063.1	[1]	1,632.0	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit before interest and taxation		2,021.7	2,112.9	[1]	1,679.0	[1]
Finance income		95.2	80.4	[1]	72.4	[1]
Finance costs		(269.8)	(254.5)	[1]	(224.1)	[1]
Revaluation of financial instruments		262.2	(48.3)	[1]	(34.7)	[1]
Profit before taxation		2,109.3	1,890.5	[1]	1,492.6	[1]
Taxation		(197.0)	(388.9)	[1]	(247.5)	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
WPP plc [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs		14.1	13.8	[1]	10.6	[1]
Operating profit		14.1	13.8	[1]	10.6	[1]
Share of results of subsidiaries		1,901.2	1,497.4	[1]	1,298.5	[1]
Profit before interest and taxation		1,915.3	1,511.2	[1]	1,309.1	[1]
Finance income	[1]				1.2
Finance costs		(99.3)	(102.5)	[1]	(146.1)	[1]
Revaluation of financial instruments		0.6	(8.6)	[1]	(4.0)	[1]
Profit before taxation		1,816.6	1,400.1	[1]	1,160.2	[1]
Profit for the year		1,816.6	1,400.1	[1]	1,160.2	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Profit for the year		1,816.6	1,400.1	[1]	1,160.2	[1]
Subsidiary Guarantors [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs		74.7	(828.2)	[1]	(83.0)	[1]
Operating profit		74.7	(828.2)	[1]	(83.0)	[1]
Share of results of subsidiaries		2,016.5	2,518.2	[1]	1,507.3	[1]
Profit before interest and taxation		2,091.2	1,690.0	[1]	1,424.3	[1]
Finance income		24.5	28.8	[1]	32.0	[1]
Finance costs		(221.5)	(222.1)	[1]	(161.6)	[1]
Profit before taxation		1,894.2	1,496.7	[1]	1,294.7	[1]
Taxation		7.0	0.7	[1]	3.8	[1]
Profit for the year		1,901.2	1,497.4	[1]	1,298.5	[1]
Attributable to:
Equity holders of the parent		1,901.2	1,497.4	[1]	1,298.5	[1]
Profit for the year		1,901.2	1,497.4	[1]	1,298.5	[1]
WPP Finance 2010 [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs	[1]		(0.1)		(0.1)
Operating profit	[1]		(0.1)		(0.1)
Profit before interest and taxation	[1]		(0.1)		(0.1)
Finance income		110.6	121.1	[1]	88.4	[1]
Finance costs		(103.4)	(98.8)	[1]	(87.4)	[1]
Revaluation of financial instruments		(5.4)	7.0	[1]
Profit before taxation		1.8	29.2	[1]	0.9	[1]
Profit for the year		1.8	29.2	[1]	0.9	[1]
Attributable to:
Equity holders of the parent		1.8	29.2	[1]	0.9	[1]
Profit for the year		1.8	29.2	[1]	0.9	[1]
Other Subsidiaries [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
Revenue		15,265.4	14,388.9	[1]	12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,355.8)	(163.2)	[1]	(821.6)	[1]
Operating profit		1,819.4	2,877.6	[1]	1,704.5	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit before interest and taxation		1,932.9	2,927.4	[1]	1,751.5	[1]
Finance income		262.8	231.9	[1]	166.0	[1]
Finance costs		(148.3)	(132.5)	[1]	(44.2)	[1]
Revaluation of financial instruments		267.0	(46.7)	[1]	(30.7)	[1]
Profit before taxation		2,314.4	2,980.1	[1]	1,842.6	[1]
Taxation		(204.0)	(389.6)	[1]	(251.3)	[1]
Profit for the year		2,110.4	2,590.5	[1]	1,591.3	[1]
Attributable to:
Equity holders of the parent		2,014.7	2,489.0	[1]	1,506.4	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		2,110.4	2,590.5	[1]	1,591.3	[1]
Reclassifications/Eliminations [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
Share of results of subsidiaries		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit before interest and taxation		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Finance income		(302.7)	(301.4)	[1]	(215.2)	[1]
Finance costs		302.7	301.4	[1]	215.2	[1]
Profit before taxation		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit for the year		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Attributable to:
Equity holders of the parent		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit for the year		£ (3,917.7)	£ (4,015.6)	[1]	£ (2,805.8)	[1]

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors - Condensed Consolidating Statement of Comprehensive Income (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	£ 1,912.3	£ 1,501.6	[1]	£ 1,245.1	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(465.2)	1,378.0		(275.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(433.1)	1,284.9		(69.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income for the year	(440.7)	1,268.6		(41.6)
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,912.3	1,501.6	[1]	1,245.1	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(465.2)	1,378.0		(275.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(433.1)	1,284.9		(69.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income for the year	(440.7)	1,268.6		(41.6)
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
WPP plc [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,816.6	1,400.1	[1]	1,160.2	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(445.5)	1,309.9		(272.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(413.4)	1,216.8		(66.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income for the year	(421.0)	1,200.5		(38.6)
Total comprehensive income for the year	1,395.6	2,600.6		1,121.6
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Total comprehensive income for the year	1,395.6	2,600.6		1,121.6
Subsidiary Guarantors [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,901.2	1,497.4	[1]	1,298.5	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(445.5)	1,309.9		(272.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(413.4)	1,216.8		(66.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income for the year	(421.0)	1,200.5		(38.6)
Total comprehensive income for the year	1,480.2	2,697.9		1,259.9
Attributable to:
Equity holders of the parent	1,480.2	2,697.9		1,259.9
Total comprehensive income for the year	1,480.2	2,697.9		1,259.9
WPP Finance 2010 [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1.8	29.2	[1]	0.9	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(0.6)	(1.2)		(0.9)
Items that may be reclassified subsequently to profit or loss	(0.6)	(1.2)		(0.9)
Items that will not be reclassified subsequently to profit or loss:
Other comprehensive (loss)/income for the year	(0.6)	(1.2)		(0.9)
Total comprehensive income for the year	1.2	28.0
Attributable to:
Equity holders of the parent	1.2	28.0
Total comprehensive income for the year	1.2	28.0
Other Subsidiaries [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	2,110.4	2,590.5	[1]	1,591.3	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(464.6)	1,379.2		(275.0)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(432.5)	1,286.1		(69.0)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive (loss)/income for the year	(440.1)	1,269.8		(40.7)
Total comprehensive income for the year	1,670.3	3,860.3		1,550.6
Attributable to:
Equity holders of the parent	1,594.3	3,690.7		1,468.7
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,670.3	3,860.3		1,550.6
Reclassifications/Eliminations [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	891.0	(2,619.8)		545.8
Gain (loss) on revaluation of available for sale investments	(64.2)	186.2		(412.0)
Items that may be reclassified subsequently to profit or loss	826.8	(2,433.6)		133.8
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	(34.0)	31.8		(67.0)
Deferred tax on defined benefit pension plans	49.2	0.8		10.4
Items that will not be reclassified subsequently to profit or loss	15.2	32.6		(56.6)
Other comprehensive (loss)/income for the year	842.0	(2,401.0)		77.2
Total comprehensive income for the year	(3,075.7)	(6,416.6)		(2,728.6)
Attributable to:
Equity holders of the parent	(3,075.7)	(6,416.6)		(2,728.6)
Total comprehensive income for the year	£ (3,075.7)	£ (6,416.6)		£ (2,728.6)

[1] Prior year figures have been re-presented as described in the accounting policies.

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors - Condensed Consolidating Cash Flow Statement (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	£ 1,408.1	£ 1,773.8	£ 1,359.9
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(669.5)
Purchases of property, plant and equipment	(288.9)	(252.1)	(210.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(499.7)	(916.2)	(902.5)
Financing activities
Share option proceeds	6.4	27.2	27.6
Cash consideration for non-controlling interests	(47.3)	(58.3)	(23.6)
Share repurchases and buy-backs	(504.2)	(427.4)	(587.6)
Net increase/(decrease) in borrowings	599.6	(22.5)	492.0
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	(785.6)	(1,193.5)	(704.0)
Net increase/(decrease) in cash and cash equivalents	122.8	(335.9)	(246.6)
Translation of cash and cash equivalents	(27.2)	291.9	(54.4)
Cash and cash equivalents at beginning of year	1,902.6	1,946.6	2,247.6
Cash and cash equivalents at end of year	1,998.2	1,902.6	1,946.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	1,408.1	1,773.8	1,359.9
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(669.5)
Purchases of property, plant and equipment	(288.9)	(252.1)	(210.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(499.7)	(916.2)	(902.5)
Financing activities
Share option proceeds	6.4	27.2	27.6
Cash consideration for non-controlling interests	(47.3)	(58.3)	(23.6)
Share repurchases and buy-backs	(504.2)	(427.4)	(587.6)
Net increase/(decrease) in borrowings	599.6	(22.5)	492.0
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	(785.6)	(1,193.5)	(704.0)
Net increase/(decrease) in cash and cash equivalents	122.8	(335.9)	(246.6)
Translation of cash and cash equivalents	(27.2)	291.9	(54.4)
Cash and cash equivalents at beginning of year	1,902.6	1,946.6	2,247.6
Cash and cash equivalents at end of year	1,998.2	1,902.6	1,946.6
WPP plc [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	32.9	963.1	983.6
Financing activities
Share option proceeds	6.4	27.2	27.6
Share repurchases and buy-backs	(289.6)	(274.5)	(406.0)
Net increase/(decrease) in borrowings	(400.0)	(392.1)	(13.7)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Net cash (outflow)/inflow from financing activities	(1,434.7)	(1,255.9)	(937.9)
Net increase/(decrease) in cash and cash equivalents	(1,401.8)	(292.8)	45.7
Translation of cash and cash equivalents	(0.9)	(5.7)	10.4
Cash and cash equivalents at beginning of year	(1,225.0)	(926.5)	(982.6)
Cash and cash equivalents at end of year	(2,627.7)	(1,225.0)	(926.5)
Subsidiary Guarantors [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	(49.7)	1,002.2	(658.3)
Investing activities
Acquisitions and disposals			(16.9)
Purchases of property, plant and equipment	(10.4)	(1.1)	(2.0)
Net cash outflow from investing activities	(10.4)	(1.1)	(18.9)
Financing activities
Cash consideration for non-controlling interests	(1.4)	(1.3)
Net cash (outflow)/inflow from financing activities	(1.4)	(1.3)
Net increase/(decrease) in cash and cash equivalents	(61.5)	999.8	(677.2)
Translation of cash and cash equivalents	48.4	(154.6)	2.3
Cash and cash equivalents at beginning of year	(1,623.7)	(2,468.9)	(1,794.0)
Cash and cash equivalents at end of year	(1,636.8)	(1,623.7)	(2,468.9)
WPP Finance 2010 [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	(13.6)	65.5	(5.6)
Financing activities
Net increase/(decrease) in cash and cash equivalents	(13.6)	65.5	(5.6)
Translation of cash and cash equivalents	1.3	(13.1)	(3.3)
Cash and cash equivalents at beginning of year	(15.1)	(67.5)	(58.6)
Cash and cash equivalents at end of year	(27.4)	(15.1)	(67.5)
Other Subsidiaries [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	1,438.5	(257.0)	1,040.2
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(652.6)
Purchases of property, plant and equipment	(278.5)	(251.0)	(208.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(489.3)	(915.1)	(883.6)
Financing activities
Cash consideration for non-controlling interests	(45.9)	(57.0)	(23.6)
Share repurchases and buy-backs	(214.6)	(152.9)	(181.6)
Net increase/(decrease) in borrowings	999.6	369.6	505.7
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	650.5	63.7	233.9
Net increase/(decrease) in cash and cash equivalents	1,599.7	(1,108.4)	390.5
Translation of cash and cash equivalents	(76.0)	465.3	(63.8)
Cash and cash equivalents at beginning of year	4,766.4	5,409.5	5,082.8
Cash and cash equivalents at end of year	£ 6,290.1	£ 4,766.4	£ 5,409.5

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as subsidiary guarantors - Condensed Consolidating Balance Sheet (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Non-current assets
Goodwill	£ 12,952.9	£ 13,214.3	£ 10,670.6
Other	2,018.4	2,217.3	1,715.4
Property, plant and equipment	979.5	968.7	797.7
Interests in associates and joint ventures	1,065.2	1,069.4	758.6
Other investments	1,153.5	1,310.3	1,158.7
Deferred tax assets	160.3	140.4
Trade and other receivables	176.2	204.9
Non-current assets	18,506.0	19,125.3
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	12,112.3	12,374.5
Cash and short-term deposits	2,391.4	2,436.9
Current assets	15,162.7	15,443.0
Current liabilities
Trade and other payables	(14,241.1)	(15,010.4)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Current liabilities	(15,514.5)	(16,765.2)
Net current (liabilities)/assets	(351.8)	(1,322.2)
Total assets less current liabilities	18,154.2	17,803.1
Non-current liabilities
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables	(992.8)	(1,273.8)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(8,192.2)	(8,035.5)
Net assets	9,962.0	9,767.6
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Non-controlling interests	468.8	443.1
Total equity	9,962.0	9,767.6	£ 8,015.8	£ 7,826.8
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Goodwill	12,952.9	13,214.3
Other	2,018.4	2,217.3
Property, plant and equipment	979.5	968.7
Interests in associates and joint ventures	1,065.2	1,069.4
Other investments	1,153.5	1,310.3
Deferred tax assets	160.3	140.4
Trade and other receivables	176.2	204.9
Non-current assets	18,506.0	19,125.3
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	12,112.3	12,374.5
Cash and short-term deposits	2,391.4	2,436.9
Current assets	15,162.7	15,443.0
Current liabilities
Trade and other payables	(14,241.1)	(15,010.4)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Current liabilities	(15,514.5)	(16,765.2)
Net current (liabilities)/assets	(351.8)	(1,322.2)
Total assets less current liabilities	18,154.2	17,803.1
Non-current liabilities
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables	(992.8)	(1,273.8)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(8,192.2)	(8,035.5)
Net assets	9,962.0	9,767.6
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Non-controlling interests	468.8	443.1
Total equity	9,962.0	9,767.6
WPP plc [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Investment in subsidiaries	14,644.0	13,356.0
Non-current assets	14,644.0	13,356.0
Current assets
Trade and other receivables	0.3	11.5
Intercompany receivables	1,661.4	1,628.7
Cash and short-term deposits		13.7
Current assets	1,661.7	1,653.9
Current liabilities
Trade and other payables	(16.9)	(21.0)
Intercompany payables	(2,808.3)	(2,659.2)
Bank overdrafts, bonds and bank loans	(2,627.7)	(1,641.8)
Current liabilities	(5,452.9)	(4,322.0)
Net current (liabilities)/assets	(3,791.2)	(2,668.1)
Total assets less current liabilities	10,852.8	10,687.9
Non-current liabilities
Intercompany payables	(1,359.6)	(1,363.4)
Non-current liabilities	(1,359.6)	(1,363.4)
Net assets	9,493.2	9,324.5
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Total equity	9,493.2	9,324.5
Subsidiary Guarantors [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Property, plant and equipment	16.5	7.1
Investment in subsidiaries	27,921.2	24,162.9
Intercompany receivables	203.3	238.9
Non-current assets	28,141.0	24,408.9
Current assets
Trade and other receivables	457.3	377.9
Intercompany receivables	1,713.8	1,690.2
Cash and short-term deposits	235.0	151.8
Current assets	2,406.1	2,219.9
Current liabilities
Trade and other payables	(113.9)	(69.5)
Intercompany payables	(3,240.0)	(3,141.1)
Bank overdrafts, bonds and bank loans	(1,871.8)	(1,775.5)
Current liabilities	(5,225.7)	(4,986.1)
Net current (liabilities)/assets	(2,819.6)	(2,766.2)
Total assets less current liabilities	25,321.4	21,642.7
Non-current liabilities
Intercompany payables	(10,677.4)	(8,286.7)
Non-current liabilities	(10,677.4)	(8,286.7)
Net assets	14,644.0	13,356.0
Attributable to:
Equity share owners' funds	14,644.0	13,356.0
Total equity	14,644.0	13,356.0
WPP Finance 2010 [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Trade and other receivables	1.6	7.0
Intercompany receivables	2,078.3	2,276.8
Non-current assets	2,079.9	2,283.8
Current assets
Trade and other receivables	0.1	0.1
Intercompany receivables	65.7	45.9
Current assets	65.8	46.0
Current liabilities
Trade and other payables	(19.6)	(21.3)
Bank overdrafts, bonds and bank loans	(27.4)	(15.1)
Current liabilities	(47.0)	(36.4)
Net current (liabilities)/assets	18.8	9.6
Total assets less current liabilities	2,098.7	2,293.4
Non-current liabilities
Bonds and bank loans	(2,087.1)	(2,282.9)
Non-current liabilities	(2,087.1)	(2,282.9)
Net assets	11.6	10.5
Attributable to:
Equity share owners' funds	11.6	10.5
Total equity	11.6	10.5
Other Subsidiaries [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Goodwill	12,952.9	13,214.3
Other	2,018.4	2,217.3
Property, plant and equipment	963.0	961.6
Interests in associates and joint ventures	1,065.2	1,069.4
Other investments	1,153.5	1,310.3
Deferred tax assets	160.3	140.4
Trade and other receivables	174.6	197.9
Intercompany receivables	10,189.5	7,626.3
Non-current assets	28,677.4	26,737.5
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	11,654.6	11,985.0
Intercompany receivables	2,728.6	2,651.1
Cash and short-term deposits	6,683.5	5,300.5
Current assets	21,725.7	20,568.2
Current liabilities
Trade and other payables	(14,090.7)	(14,898.6)
Intercompany payables	(121.2)	(215.6)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.3)	(599.2)
Current liabilities	(15,485.5)	(16,465.7)
Net current (liabilities)/assets	6,240.2	4,102.5
Total assets less current liabilities	34,917.6	30,840.0
Non-current liabilities
Bonds and bank loans	(4,163.3)	(3,282.0)
Trade and other payables	(992.8)	(1,273.8)
Intercompany payables	(434.1)	(491.9)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(6,539.2)	(6,244.5)
Net assets	28,378.4	24,595.5
Attributable to:
Equity share owners' funds	27,909.6	24,152.4
Non-controlling interests	468.8	443.1
Total equity	28,378.4	24,595.5
Reclassifications/Eliminations [member] | Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Air 1, WPP 2008 Limited, WPP 2005 Limited, WPP 2012 Limited, and WPP Jubilee Limited as Subsidiary Guarantors [member]
Non-current assets
Investment in subsidiaries	(42,565.2)	(37,518.9)
Intercompany receivables	(12,471.1)	(10,142.0)
Non-current assets	(55,036.3)	(47,660.9)
Current assets
Intercompany receivables	(6,169.5)	(6,015.9)
Cash and short-term deposits	(4,527.1)	(3,029.1)
Current assets	(10,696.6)	(9,045.0)
Current liabilities
Intercompany payables	6,169.5	6,015.9
Bank overdrafts, bonds and bank loans	4,527.1	3,029.1
Current liabilities	10,696.6	9,045.0
Total assets less current liabilities	(55,036.3)	(47,660.9)
Non-current liabilities
Intercompany payables	12,471.1	10,142.0
Non-current liabilities	12,471.1	10,142.0
Net assets	(42,565.2)	(37,518.9)
Attributable to:
Equity share owners' funds	(42,565.2)	(37,518.9)
Total equity	£ (42,565.2)	£ (37,518.9)

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Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017 USD ($)
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Ownership percentage in subsidiaries	100.00%
US$ bonds due September 2024 [member]
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Bond amount	$ 750,000,000
Interest rate	3.75%
US$ bonds due November 2043 [member]
Disclosure of detailed information of condensed consolidated financial information [Line Items]
Bond amount	$ 500,000,000
Interest rate	5.625%

XML

Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Condensed Consolidating Income Statement (Detail) - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of condensed consolidating income statement information [line items]
Revenue		£ 15,265.4	£ 14,388.9	[1]	£ 12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,267.0)	(977.7)	[1]	(894.1)	[1]
Operating profit		1,908.2	2,063.1	[1]	1,632.0	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit/(loss) before interest and taxation		2,021.7	2,112.9	[1]	1,679.0	[1]
Finance income		95.2	80.4	[1]	72.4	[1]
Finance costs		(269.8)	(254.5)	[1]	(224.1)	[1]
Revaluation of financial instruments		262.2	(48.3)	[1]	(34.7)	[1]
Profit before taxation		2,109.3	1,890.5	[1]	1,492.6	[1]
Taxation		(197.0)	(388.9)	[1]	(247.5)	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
Revenue		15,265.4	14,388.9	[1]	12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,267.0)	(977.7)	[1]	(894.1)	[1]
Operating profit		1,908.2	2,063.1	[1]	1,632.0	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit/(loss) before interest and taxation		2,021.7	2,112.9	[1]	1,679.0	[1]
Finance income		95.2	80.4	[1]	72.4	[1]
Finance costs		(269.8)	(254.5)	[1]	(224.1)	[1]
Revaluation of financial instruments		262.2	(48.3)	[1]	(34.7)	[1]
Profit before taxation		2,109.3	1,890.5	[1]	1,492.6	[1]
Taxation		(197.0)	(388.9)	[1]	(247.5)	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		1,912.3	1,501.6	[1]	1,245.1	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP plc [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs		14.1	13.8	[1]	10.6	[1]
Operating profit		14.1	13.8	[1]	10.6	[1]
Share of results of subsidiaries		1,901.2	1,497.4	[1]	1,298.5	[1]
Profit/(loss) before interest and taxation		1,915.3	1,511.2	[1]	1,309.1	[1]
Finance income	[1]				1.2
Finance costs		(99.3)	(102.5)	[1]	(146.1)	[1]
Revaluation of financial instruments		0.6	(8.6)	[1]	(4.0)	[1]
Profit before taxation		1,816.6	1,400.1	[1]	1,160.2	[1]
Profit for the year		1,816.6	1,400.1	[1]	1,160.2	[1]
Attributable to:
Equity holders of the parent		1,816.6	1,400.1	[1]	1,160.2	[1]
Profit for the year		1,816.6	1,400.1	[1]	1,160.2	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Subsidiary Guarantors [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs		74.7	(828.2)	[1]	(83.0)	[1]
Operating profit		74.7	(828.2)	[1]	(83.0)	[1]
Share of results of subsidiaries		2,016.5	2,518.2	[1]	1,507.3	[1]
Profit/(loss) before interest and taxation		2,091.2	1,690.0	[1]	1,424.3	[1]
Finance income		24.5	28.8	[1]	32.0	[1]
Finance costs		(221.5)	(222.1)	[1]	(161.6)	[1]
Profit before taxation		1,894.2	1,496.7	[1]	1,294.7	[1]
Taxation		7.0	0.7	[1]	3.8	[1]
Profit for the year		1,901.2	1,497.4	[1]	1,298.5	[1]
Attributable to:
Equity holders of the parent		1,901.2	1,497.4	[1]	1,298.5	[1]
Profit for the year		1,901.2	1,497.4	[1]	1,298.5	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP Finance 2010 [member]
Disclosure of condensed consolidating income statement information [line items]
General and administrative costs	[1]		(0.1)		(0.1)
Operating profit	[1]		(0.1)		(0.1)
Profit/(loss) before interest and taxation	[1]		(0.1)		(0.1)
Finance income		110.6	121.1	[1]	88.4	[1]
Finance costs		(103.4)	(98.8)	[1]	(87.4)	[1]
Revaluation of financial instruments		(5.4)	7.0	[1]
Profit before taxation		1.8	29.2	[1]	0.9	[1]
Profit for the year		1.8	29.2	[1]	0.9	[1]
Attributable to:
Equity holders of the parent		1.8	29.2	[1]	0.9	[1]
Profit for the year		1.8	29.2	[1]	0.9	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Other Subsidiaries [member]
Disclosure of condensed consolidating income statement information [line items]
Revenue		15,265.4	14,388.9	[1]	12,235.2	[1]
Costs of services		(12,090.2)	(11,348.1)	[1]	(9,709.1)	[1]
Gross profit		3,175.2	3,040.8	[1]	2,526.1	[1]
General and administrative costs		(1,355.8)	(163.2)	[1]	(821.6)	[1]
Operating profit		1,819.4	2,877.6	[1]	1,704.5	[1]
Share of results of associates		113.5	49.8	[1]	47.0	[1]
Profit/(loss) before interest and taxation		1,932.9	2,927.4	[1]	1,751.5	[1]
Finance income		262.8	231.9	[1]	166.0	[1]
Finance costs		(148.3)	(132.5)	[1]	(44.2)	[1]
Revaluation of financial instruments		267.0	(46.7)	[1]	(30.7)	[1]
Profit before taxation		2,314.4	2,980.1	[1]	1,842.6	[1]
Taxation		(204.0)	(389.6)	[1]	(251.3)	[1]
Profit for the year		2,110.4	2,590.5	[1]	1,591.3	[1]
Attributable to:
Equity holders of the parent		2,014.7	2,489.0	[1]	1,506.4	[1]
Non-controlling interests		95.7	101.5	[1]	84.9	[1]
Profit for the year		2,110.4	2,590.5	[1]	1,591.3	[1]
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Reclassifications/Eliminations [member]
Disclosure of condensed consolidating income statement information [line items]
Share of results of subsidiaries		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit/(loss) before interest and taxation		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Finance income		(302.7)	(301.4)	[1]	(215.2)	[1]
Finance costs		302.7	301.4	[1]	215.2	[1]
Profit before taxation		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit for the year		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Attributable to:
Equity holders of the parent		(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Profit for the year		£ (3,917.7)	£ (4,015.6)	[1]	£ (2,805.8)	[1]

[1] Prior year figures have been re-presented as described in the accounting policies.

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Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Condensed Consolidating Statement of Comprehensive Income (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	£ 1,912.3	£ 1,501.6	[1]	£ 1,245.1	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(465.2)	1,378.0		(275.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(433.1)	1,284.9		(69.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive income/(loss) for the year	(440.7)	1,268.6		(41.6)
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,912.3	1,501.6	[1]	1,245.1	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(465.2)	1,378.0		(275.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(433.1)	1,284.9		(69.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive income/(loss) for the year	(440.7)	1,268.6		(41.6)
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,471.6	2,770.2		1,203.5
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP plc [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,816.6	1,400.1	[1]	1,160.2	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(445.5)	1,309.9		(272.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(413.4)	1,216.8		(66.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive income/(loss) for the year	(421.0)	1,200.5		(38.6)
Total comprehensive income for the year	1,395.6	2,600.6		1,121.6
Attributable to:
Equity holders of the parent	1,395.6	2,600.6		1,121.6
Total comprehensive income for the year	1,395.6	2,600.6		1,121.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Subsidiary Guarantors [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1,901.2	1,497.4	[1]	1,298.5	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(445.5)	1,309.9		(272.9)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(413.4)	1,216.8		(66.9)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive income/(loss) for the year	(421.0)	1,200.5		(38.6)
Total comprehensive income for the year	1,480.2	2,697.9		1,259.9
Attributable to:
Equity holders of the parent	1,480.2	2,697.9		1,259.9
Total comprehensive income for the year	1,480.2	2,697.9		1,259.9
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP Finance 2010 [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	1.8	29.2	[1]	0.9	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(0.6)	(1.2)		(0.9)
Items that may be reclassified subsequently to profit or loss	(0.6)	(1.2)		(0.9)
Items that will not be reclassified subsequently to profit or loss:
Other comprehensive income/(loss) for the year	(0.6)	(1.2)		(0.9)
Total comprehensive income for the year	1.2	28.0
Attributable to:
Equity holders of the parent	1.2	28.0
Total comprehensive income for the year	1.2	28.0
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Other Subsidiaries [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	2,110.4	2,590.5	[1]	1,591.3	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	(464.6)	1,379.2		(275.0)
Gain (loss) on revaluation of available for sale investments	32.1	(93.1)		206.0
Items that may be reclassified subsequently to profit or loss	(432.5)	1,286.1		(69.0)
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	17.0	(15.9)		33.5
Deferred tax on defined benefit pension plans	(24.6)	(0.4)		(5.2)
Items that will not be reclassified subsequently to profit or loss	(7.6)	(16.3)		28.3
Other comprehensive income/(loss) for the year	(440.1)	1,269.8		(40.7)
Total comprehensive income for the year	1,670.3	3,860.3		1,550.6
Attributable to:
Equity holders of the parent	1,594.3	3,690.7		1,468.7
Non-controlling interests	76.0	169.6		81.9
Total comprehensive income for the year	1,670.3	3,860.3		1,550.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Reclassifications/Eliminations [member]
Disclosure of condensed consolidating statement of comprehensive income [line items]
Profit for the year	(3,917.7)	(4,015.6)	[1]	(2,805.8)	[1]
Items that may be reclassified subsequently to profit or loss:
Exchange adjustments on foreign currency net investments	891.0	(2,619.8)		545.8
Gain (loss) on revaluation of available for sale investments	(64.2)	186.2		(412.0)
Items that may be reclassified subsequently to profit or loss	826.8	(2,433.6)		133.8
Items that will not be reclassified subsequently to profit or loss:
Actuarial gain/(loss) on defined benefit pension plans	(34.0)	31.8		(67.0)
Deferred tax on defined benefit pension plans	49.2	0.8		10.4
Items that will not be reclassified subsequently to profit or loss	15.2	32.6		(56.6)
Other comprehensive income/(loss) for the year	842.0	(2,401.0)		77.2
Total comprehensive income for the year	(3,075.7)	(6,416.6)		(2,728.6)
Attributable to:
Equity holders of the parent	(3,075.7)	(6,416.6)		(2,728.6)
Total comprehensive income for the year	£ (3,075.7)	£ (6,416.6)		£ (2,728.6)

[1] Prior year figures have been re-presented as described in the accounting policies.

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Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Condensed Consolidating Cash Flow Statement (Detail) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	£ 1,408.1	£ 1,773.8	£ 1,359.9
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(669.5)
Purchases of property, plant and equipment	(288.9)	(252.1)	(210.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(499.7)	(916.2)	(902.5)
Financing activities
Share option proceeds	6.4	27.2	27.6
Cash consideration for non-controlling interests	(47.3)	(58.3)	(23.6)
Share repurchases and buy-backs	(504.2)	(427.4)	(587.6)
Net increase/(decrease) in borrowings	599.6	(22.5)	492.0
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	(785.6)	(1,193.5)	(704.0)
Net increase/(decrease) in cash and cash equivalents	122.8	(335.9)	(246.6)
Translation of cash and cash equivalents	(27.2)	291.9	(54.4)
Cash and cash equivalents at beginning of year	1,902.6	1,946.6	2,247.6
Cash and cash equivalents at end of year	1,998.2	1,902.6	1,946.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	1,408.1	1,773.8	1,359.9
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(669.5)
Purchases of property, plant and equipment	(288.9)	(252.1)	(210.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(499.7)	(916.2)	(902.5)
Financing activities
Share option proceeds	6.4	27.2	27.6
Cash consideration for non-controlling interests	(47.3)	(58.3)	(23.6)
Share repurchases and buy-backs	(504.2)	(427.4)	(587.6)
Net increase/(decrease) in borrowings	599.6	(22.5)	492.0
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	(785.6)	(1,193.5)	(704.0)
Net increase/(decrease) in cash and cash equivalents	122.8	(335.9)	(246.6)
Translation of cash and cash equivalents	(27.2)	291.9	(54.4)
Cash and cash equivalents at beginning of year	1,902.6	1,946.6	2,247.6
Cash and cash equivalents at end of year	1,998.2	1,902.6	1,946.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP plc [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	32.9	963.1	983.6
Financing activities
Share option proceeds	6.4	27.2	27.6
Share repurchases and buy-backs	(289.6)	(274.5)	(406.0)
Net increase/(decrease) in borrowings	(400.0)	(392.1)	(13.7)
Equity dividends paid	(751.5)	(616.5)	(545.8)
Net cash (outflow)/inflow from financing activities	(1,434.7)	(1,255.9)	(937.9)
Net increase/(decrease) in cash and cash equivalents	(1,401.8)	(292.8)	45.7
Translation of cash and cash equivalents	(0.9)	(5.7)	10.4
Cash and cash equivalents at beginning of year	(1,225.0)	(926.5)	(982.6)
Cash and cash equivalents at end of year	(2,627.7)	(1,225.0)	(926.5)
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Subsidiary Guarantors [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	(49.7)	1,002.2	(658.3)
Investing activities
Acquisitions and disposals			(16.9)
Purchases of property, plant and equipment	(10.4)	(1.1)	(2.0)
Net cash outflow from investing activities	(10.4)	(1.1)	(18.9)
Financing activities
Cash consideration for non-controlling interests	(1.4)	(1.3)
Net cash (outflow)/inflow from financing activities	(1.4)	(1.3)
Net increase/(decrease) in cash and cash equivalents	(61.5)	999.8	(677.2)
Translation of cash and cash equivalents	48.4	(154.6)	2.2
Cash and cash equivalents at beginning of year	(1,627.5)	(2,472.7)	(1,797.7)
Cash and cash equivalents at end of year	(1,640.6)	(1,627.5)	(2,472.7)
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP Finance 2010 [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	(13.6)	65.5	(5.6)
Financing activities
Net increase/(decrease) in cash and cash equivalents	(13.6)	65.5	(5.6)
Translation of cash and cash equivalents	1.3	(13.1)	(3.3)
Cash and cash equivalents at beginning of year	(15.1)	(67.5)	(58.6)
Cash and cash equivalents at end of year	(27.4)	(15.1)	(67.5)
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Other Subsidiaries [member]
Disclosure of condensed consolidating cash flow statement information [line items]
Net cash inflow/(outflow) from operating activities	1,438.5	(257.0)	1,040.2
Investing activities
Acquisitions and disposals	(181.5)	(638.8)	(652.6)
Purchases of property, plant and equipment	(278.5)	(251.0)	(208.3)
Purchases of other intangible assets (including capitalised computer software)	(37.3)	(33.0)	(36.1)
Proceeds on disposal of property, plant and equipment	8.0	7.7	13.4
Net cash outflow from investing activities	(489.3)	(915.1)	(883.6)
Financing activities
Cash consideration for non-controlling interests	(45.9)	(57.0)	(23.6)
Share repurchases and buy-backs	(214.6)	(152.9)	(181.6)
Net increase/(decrease) in borrowings	999.6	369.6	505.7
Financing and share issue costs	(0.8)	(6.4)	(11.4)
Dividends paid to non-controlling interests in subsidiary undertakings	(87.8)	(89.6)	(55.2)
Net cash (outflow)/inflow from financing activities	650.5	63.7	233.9
Net increase/(decrease) in cash and cash equivalents	1,599.7	(1,108.4)	390.5
Translation of cash and cash equivalents	(76.0)	465.3	(63.7)
Cash and cash equivalents at beginning of year	4,770.2	5,413.3	5,086.5
Cash and cash equivalents at end of year	£ 6,293.9	£ 4,770.2	£ 5,413.3

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Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Condensed Consolidating Balance Sheet (Detail) - GBP (£) £ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Non-current assets
Goodwill	£ 12,952.9	£ 13,214.3	£ 10,670.6
Other	2,018.4	2,217.3	1,715.4
Property, plant and equipment	979.5	968.7	797.7
Interests in associates and joint ventures	1,065.2	1,069.4	758.6
Other investments	1,153.5	1,310.3	1,158.7
Deferred tax assets	160.3	140.4
Trade and other receivables	176.2	204.9
Non-current assets	18,506.0	19,125.3
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	12,112.3	12,374.5
Cash and short-term deposits	2,391.4	2,436.9
Current assets	15,162.7	15,443.0
Current liabilities
Trade and other payables	(14,241.1)	(15,010.4)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Current liabilities	(15,514.5)	(16,765.2)
Net current (liabilities)/assets	(351.8)	(1,322.2)
Total assets less current liabilities	18,154.2	17,803.1
Non-current liabilities
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables	(992.8)	(1,273.8)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(8,192.2)	(8,035.5)
Net assets	9,962.0	9,767.6
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Non-controlling interests	468.8	443.1
Total equity	9,962.0	9,767.6	£ 8,015.8	£ 7,826.8
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member]
Non-current assets
Goodwill	12,952.9	13,214.3
Other	2,018.4	2,217.3
Property, plant and equipment	979.5	968.7
Interests in associates and joint ventures	1,065.2	1,069.4
Other investments	1,153.5	1,310.3
Deferred tax assets	160.3	140.4
Trade and other receivables	176.2	204.9
Non-current assets	18,506.0	19,125.3
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	12,112.3	12,374.5
Cash and short-term deposits	2,391.4	2,436.9
Current assets	15,162.7	15,443.0
Current liabilities
Trade and other payables	(14,241.1)	(15,010.4)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.1)	(1,002.5)
Current liabilities	(15,514.5)	(16,765.2)
Net current (liabilities)/assets	(351.8)	(1,322.2)
Total assets less current liabilities	18,154.2	17,803.1
Non-current liabilities
Bonds and bank loans	(6,250.4)	(5,564.9)
Trade and other payables	(992.8)	(1,273.8)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(8,192.2)	(8,035.5)
Net assets	9,962.0	9,767.6
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Non-controlling interests	468.8	443.1
Total equity	9,962.0	9,767.6
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP plc [member]
Non-current assets
Investment in subsidiaries	14,644.0	13,356.0
Non-current assets	14,644.0	13,356.0
Current assets
Trade and other receivables	0.3	11.5
Intercompany receivables	1,661.4	1,628.7
Cash and short-term deposits		13.7
Current assets	1,661.7	1,653.9
Current liabilities
Trade and other payables	(16.9)	(21.0)
Intercompany payables	(2,808.3)	(2,659.2)
Bank overdrafts, bonds and bank loans	(2,627.7)	(1,641.8)
Current liabilities	(5,452.9)	(4,322.0)
Net current (liabilities)/assets	(3,791.2)	(2,668.1)
Total assets less current liabilities	10,852.8	10,687.9
Non-current liabilities
Intercompany payables	(1,359.6)	(1,363.4)
Non-current liabilities	(1,359.6)	(1,363.4)
Net assets	9,493.2	9,324.5
Attributable to:
Equity share owners' funds	9,493.2	9,324.5
Total equity	9,493.2	9,324.5
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Subsidiary Guarantors [member]
Non-current assets
Property, plant and equipment	16.5	7.1
Investment in subsidiaries	27,752.6	23,994.3
Intercompany receivables	203.3	238.9
Non-current assets	27,972.4	24,240.3
Current assets
Trade and other receivables	457.3	377.9
Intercompany receivables	1,713.8	1,690.2
Cash and short-term deposits	231.2	148.0
Current assets	2,402.3	2,216.1
Current liabilities
Trade and other payables	(113.9)	(69.5)
Intercompany payables	(3,067.6)	(2,968.7)
Bank overdrafts, bonds and bank loans	(1,871.8)	(1,775.5)
Current liabilities	(5,053.3)	(4,813.7)
Net current (liabilities)/assets	(2,651.0)	(2,597.6)
Total assets less current liabilities	25,321.4	21,642.7
Non-current liabilities
Intercompany payables	(10,677.4)	(8,286.7)
Non-current liabilities	(10,677.4)	(8,286.7)
Net assets	14,644.0	13,356.0
Attributable to:
Equity share owners' funds	14,644.0	13,356.0
Total equity	14,644.0	13,356.0
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP Finance 2010 [member]
Non-current assets
Trade and other receivables	1.6	7.0
Intercompany receivables	2,078.3	2,276.8
Non-current assets	2,079.9	2,283.8
Current assets
Trade and other receivables	0.1	0.1
Intercompany receivables	65.7	45.9
Current assets	65.8	46.0
Current liabilities
Trade and other payables	(19.6)	(21.3)
Bank overdrafts, bonds and bank loans	(27.4)	(15.1)
Current liabilities	(47.0)	(36.4)
Net current (liabilities)/assets	18.8	9.6
Total assets less current liabilities	2,098.7	2,293.4
Non-current liabilities
Bonds and bank loans	(2,087.1)	(2,282.9)
Non-current liabilities	(2,087.1)	(2,282.9)
Net assets	11.6	10.5
Attributable to:
Equity share owners' funds	11.6	10.5
Total equity	11.6	10.5
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Other Subsidiaries [member]
Non-current assets
Goodwill	12,952.9	13,214.3
Other	2,018.4	2,217.3
Property, plant and equipment	963.0	961.6
Interests in associates and joint ventures	1,065.2	1,069.4
Other investments	1,153.5	1,310.3
Deferred tax assets	160.3	140.4
Trade and other receivables	174.6	197.9
Intercompany receivables	10,189.5	7,626.3
Non-current assets	28,677.4	26,737.5
Current assets
Inventory and work in progress	424.3	400.4
Corporate income tax recoverable	234.7	231.2
Trade and other receivables	11,654.6	11,985.0
Intercompany receivables	2,728.5	2,651.1
Cash and short-term deposits	6,687.3	5,304.3
Current assets	21,729.4	20,572.0
Current liabilities
Trade and other payables	(14,090.7)	(14,898.6)
Intercompany payables	(293.5)	(388.0)
Corporate income tax payable	(649.3)	(752.3)
Bank overdrafts, bonds and bank loans	(624.3)	(599.2)
Current liabilities	(15,657.8)	(16,638.1)
Net current (liabilities)/assets	6,071.6	3,933.9
Total assets less current liabilities	34,749.0	30,671.4
Non-current liabilities
Bonds and bank loans	(4,163.3)	(3,282.0)
Trade and other payables	(992.8)	(1,273.8)
Intercompany payables	(434.1)	(491.9)
Deferred tax liabilities	(513.7)	(692.4)
Provision for post-employment benefits	(206.3)	(276.5)
Provisions for liabilities and charges	(229.0)	(227.9)
Non-current liabilities	(6,539.2)	(6,244.5)
Net assets	28,209.8	24,426.9
Attributable to:
Equity share owners' funds	27,741.0	23,983.8
Non-controlling interests	468.8	443.1
Total equity	28,209.8	24,426.9
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Reclassifications/Eliminations [member]
Non-current assets
Investment in subsidiaries	(42,396.6)	(37,350.3)
Intercompany receivables	(12,471.1)	(10,142.0)
Non-current assets	(54,867.7)	(47,492.3)
Current assets
Intercompany receivables	(6,169.4)	(6,015.9)
Cash and short-term deposits	(4,527.1)	(3,029.1)
Current assets	(10,696.5)	(9,045.0)
Current liabilities
Intercompany payables	6,169.4	6,015.9
Bank overdrafts, bonds and bank loans	4,527.1	3,029.1
Current liabilities	10,696.5	9,045.0
Total assets less current liabilities	(54,867.7)	(47,492.3)
Non-current liabilities
Intercompany payables	12,471.1	10,142.0
Non-current liabilities	12,471.1	10,142.0
Net assets	(42,396.6)	(37,350.3)
Attributable to:
Equity share owners' funds	(42,396.6)	(37,350.3)
Total equity	£ (42,396.6)	£ (37,350.3)