Exhibit 5.1

	e-mail:
	erobinson@applebyglobal.com
Willis Group Holdings Limited Canon’s Court 22 Victoria Street Hamilton HM12 Bermuda	direct dial: Tel 298 3268 Fax 298 3374 your ref:
	appleby ref: ERM/124997.55 1 October 2008

Dear Sirs

Willis Group Holdings Limited (the “Company”)

We have acted as legal counsel in Bermuda to the Company in connection with the preparation and filing of registration statement on Form S-8 filed by the Company with the United States Securities and Exchange Commission pursuant to the Securities Act of 1933 on 1 October 2008 (the “Registration Statement”), to register 3,849,181 of the Company’s common shares of par value US$0.000115 each (the “Shares”), to be issued and sold under the following plans (the “Plans”):

(i)	the Hilb, Rogal and Hamilton Company 2000 Stock Incentive Plan, as amended and restated February 11, 2003;
(ii)	the Hilb Rogal & Hobbs Company 2007 Stock Incentive Plan;
(iii)	the Hilb Rogal & Hobbs Company Non-employee Directors Stock Incentive Plan, as amended and restated effective January 1, 2007;
(iv)	the Hilb Rogal & Hobbs Company Executive Voluntary Deferral Plan, as amended and restated effective January 1, 2005; and
(v)	the Hilb Rogal & Hobbs Company Outside Directors Deferral Plan, as amended and restated effective January 1, 2007.

For the purposes of this opinion we have examined and relied upon the documents listed, and in some cases defined, in the Schedule to this opinion (the “Documents”).

Assumptions

In stating our opinion we have assumed:

(a) the authenticity, accuracy and completeness of all Documents examined by us submitted to us as originals and the conformity to authentic original documents of all Documents and other such documentation submitted to us as certified, conformed, notarised, faxed or photostatic copies;

Willis Group Holdings Limited
1 October 2008

(b)	that each of the Documents which was received by electronic means is complete, intact and in conformity with the transmission as sent;
(c)	the genuineness of all signatures on the Documents;
(d)	the authority, capacity and power of each of the persons signing the Documents (other than the Company);
(e)	that any representation, warranty or statement of fact or law, other than as to the laws of Bermuda made in any of the Documents is true, accurate and complete;
(f)	that there are no provisions of the laws or regulations of any jurisdiction other than Bermuda which would be contravened by the issuance of the Shares which would have any implication in relation to the opinions expressed herein;
(g)	that the Resolutions are in full force and effect, have not been rescinded, either in whole or in part, and accurately record the resolutions passed by the Board of Directors of the Company in a meeting which was duly convened and at which a duly constituted quorum was present and voting throughout and that there is no matter affecting the authority of the Directors to effect the issue of the Shares and the filing by the Company of the Registration Statement, not disclosed by the Constitutional Documents or the Resolutions, which would have any adverse implication in relation to the opinions expressed herein;
(h)	that, when the Directors of the Company passed the Resolutions, each of the Directors discharged his fiduciary duties to the Company and acted honestly and in good faith with a view to the best interests of the Company;
(i)	that the records which were the subject of the Company Search were complete and accurate at the time of such search and disclosed all information which is material for the purposes of this opinion and such information has not since the date of the Company Search been materially altered; and
(j)	that the records which were the subject of the Litigation Search were complete and accurate at the time of such search and disclosed all information which is

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material for the purposes of this opinion and such information has not since the date of the Litigation Search been materially altered.

Opinion

Based upon and subject to the foregoing and subject to the reservations set out below and to any matters not disclosed to us, we are of the opinion that:

(1) The Company is an exempted company incorporated with limited liability and existing under the laws of Bermuda. The Company possesses the capacity to sue and be sued in its own name and is in good standing under the laws of Bermuda.

(2) All necessary corporate action required to be taken by the Company in connection with the issue by the Company of the Shares pursuant to Bermuda law has been taken by or on behalf of the Company, and all necessary approvals of Governmental authorities in Bermuda have been duly obtained for the issue by the Company of the Shares.

(3) When issued pursuant to the Resolutions and delivered against payment therefor in the circumstances referred to or summarised in the Registration Statement and the Merger Agreement, the Shares will be validly issued, fully paid and non-assessable shares in the capital of the Company.

(4) There are no taxes, duties or other charges payable to or chargeable by the Government of Bermuda, or any authority or agency thereof in respect of the issue of the Shares.

Reservations

We have the following reservations:

(a) We express no opinion as to any law other than Bermuda law and none of the opinions expressed herein relates to compliance with or matters governed by the laws of any jurisdiction except Bermuda. This opinion is limited to Bermuda law as applied by the Courts of Bermuda at the date hereof.

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(b) Searches of the Register of Companies at the office of the Registrar of Companies and of the Supreme Court Causes Book at the Registry of the Supreme Court are not conclusive and it should be noted that the Register of Companies and the Supreme Court Causes Book do not reveal:

(i)	details of matters which have been lodged for filing or registration which as a matter of best practice of the Registrar of Companies or the Registry of the Supreme Court would have or should have been disclosed on the public file, the Causes Book or the Judgment Book, as the case may be, but for whatever reason have not actually been filed or registered or are not disclosed or which, notwithstanding filing or registration, at the date and time the search is concluded are for whatever reason not disclosed or do not appear on the public file, the Causes Book or Judgment Book;
(ii)	details of matters which should have been lodged for filing or registration at the Registrar of Companies or the Registry of the Supreme Court but have not been lodged for filing or registration at the date the search is concluded;
(iii)	whether an application to the Supreme Court for a winding-up petition or for the appointment of a receiver or manager has been prepared but not yet been presented or has been presented but does not appear in the Causes Book at the date and time the search is concluded;
(iv)	whether any arbitration or administrative proceedings are pending or whether any proceedings are threatened, or whether any arbitrator has been appointed; or
(v)	whether a receiver or manager has been appointed privately pursuant to the provisions of a debenture or other security, unless notice of the fact has been entered in the Register of Charges in accordance with the provisions of the Act.

Furthermore, in the absence of a statutorily defined system for the registration of charges created by companies incorporated outside Bermuda (“overseas

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	companies”) over their assets located in Bermuda, it is not possible to determine definitively from searches of the Register of Charges maintained by the Registrar of Companies in respect of such overseas companies what charges have been registered over any of their assets located in Bermuda or whether any one charge has priority over any other charge over such assets.
(c)	In order to issue this opinion we have carried out the Company Search as referred to in the Schedule to this opinion and have not enquired as to whether there has been any change since the date of such search.
(d)	In order to issue this opinion we have carried out the Litigation Search as referred to in the Schedule to this opinion and have not enquired as to whether there has been any change since the date of such search.
(e)	In paragraph (1) above, the term “good standing” means that the Company has received a Certificate of Compliance from the Registrar of Companies.
(f)	Any reference in this opinion to shares being “non-assessable” shall mean, in relation to fully paid shares of the Company and subject to any contrary provision in any agreement in writing between such company and the holder of such shares, that no shareholder shall be bound by an alteration to the Memorandum of Association or Bye-laws of the Company after the date on which he became a shareholder, if and so far as the alteration requires him to take, or subscribe for additional shares, or in any way increases his liability to contribute to the share capital of, or otherwise to pay money to, the Company.

Disclosure

This opinion is addressed to you in connection with the filing by the Company of the Registration Statement with the United States Securities and Exchange Commission solely for the benefit of the Company and (save as referred to in the following paragraph), is not to be relied upon for any other purpose or quoted, or referred to in any public document, or filed with any governmental agency or person without our prior written consent, except as may be required by law.

We consent to the inclusion of this opinion as an exhibit to the Registration Statement.

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This opinion speaks as of its date and is strictly limited to the matters stated herein and we assume no obligation to review or update this opinion if applicable law or the existing facts or circumstances should change.

This opinion is governed by and is to be construed in accordance with Bermuda law. It is given on the basis that it will not give rise to any legal proceedings with respect thereto in any jurisdiction other than Bermuda.

Yours faithfully

Appleby

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SCHEDULE

1.	The entries and filings shown in respect of the Company on the file of the Company maintained in the Register of Companies at the office of the Registrar of Companies in Hamilton, Bermuda, as revealed by a search conducted on 1 October 2008 (the “Company Search”).
2.	The entries and filings shown in respect of the Company in the Supreme Court Causes Book maintained at the Registry of the Supreme Court in Hamilton, Bermuda, as revealed by a search conducted on 1 October 2008 (the “Litigation Search”).
3.	Certified copies of the Memorandum of Association and Bye-Laws of the Company (collectively referred to as the “Constitutional Documents”).
4.	Certified copy of minutes of the meeting of the Board of Directors of the Company held on 6 June 2008 (together “the “Resolutions”).
5.	A Certificate of Compliance, dated 1 October 2008 issued by the Registrar of Companies in respect of the Company.
6.	A copy of the Registration Statement.
7.	A copy of the Agreement and Plan of Merger among the Company, Hermes Acquisition Corp. and Hilb Rogal & Hobbs Company dated as of 7 June 2008 (the “Merger Agreement”).
8.	A copy of the letter of permission dated 1 May 2001 issued by the Bermuda Monetary Authority in relation to the Company and a copy of the general permission of the Bermuda Monetary Authority dated 1 June 2005 (together the “Permission”).

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