FORM 6-K

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Pursuant to Rule 13a - - 16 or 15d - 16 of
The Securities and Exchange Act of 1934

For the Month of July, 2007

HANSON PLC

(Translation of registrant's name into English)

1 Grosvenor Place, London, SW1X 7JH, England

(Address of principal executive office)

[Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40F.]

Form 20-F X      Form 40-F

[Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.]

Yes         No X

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

Hanson PLC

2. Reason for the notification (Yes/No)

An acquisition or disposal of voting rights                               Yes

An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached:

An event changing the breakdown of voting rights:

Other (please specify) :

3. Full name of person(s) subject to the notification obligation:

Credit Suisse Securities (Europe) Limited

4. Full name of shareholder(s) (if different from 3.):

Credit Suisse Securities (Europe) Limited,

Credit Suisse International,

Credit Suisse Investment Banking Division


5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

05.07.07

6. Date on which issuer notified:

09.07.07

7. Threshold(s) that is/are crossed or reached:

Below 3%


8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible       Situation previous to the Triggering transaction
using the ISIN CODE
                                  Number of shares                   Number of voting Rights

ORD-
GB0033516088


Resulting situation after the triggering transaction

Class/type of shares if     Number of shares        Number of voting rights            % of voting rights
possible using the ISIN
CODE
                                                    Direct         Indirect            Direct      Indirect

ORD-                        Below 3%                Below 3%       n/a                 Below 3%      n/a
GB0033516088



B: Financial Instruments

Resulting situation after the triggering transaction

Type of         Expiration Date       Exercise/Conversion       Number of voting rights     % of voting rights
financial                             Period/ Date              that may be acquired if the
instrument                                                      instrument is exercised/
                                                                converted.



Total (A+B)
Number of voting rights        % of voting rights

Below 3%                       Below 3%



9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

Credit Suisse Securities (Europe) Limited,Credit Suisse International and Credit
Suisse Investment Banking Division are part of the Investment Banking division
of Credit Suisse ("CSIBD"), which is  part of the Credit Suisse Group ("CSG").
CSIBD is a segregated business unit within CSG with an independent management
structure and exercises its voting rights independently from other divisions of
CSG.


Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will
cease to hold:

12. Date on which proxy holder will cease to
hold voting rights:


13. Additional information:



14. Contact name:                            Glenda Burford

15. Contact telephone number:                +44207888 3599






Annex Notification Of Major Interests In Shares


A: Identity of the person or legal entity subject to the notification obligation


Full name (including legal form for legal entities):

Credit Suisse Securities (Europe) Limited

Contact address (registered office for legal entities):

One Cabot Square, London E14 4QJ

Phone number:

0207 888 3599 glenda.burford@credit-suisse.com

Other useful information (at least legal representative for legal persons):

Glenda Burford

B: Identity of the notifier, if applicable



Full name:



Contact address:



Phone number:



Other useful information (e.g. functional relationship with the person or legal
entity subject to the notification obligation):



C: Additional information :

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorised.

                                                                        HANSON PLC           

                                                          By:           /s/ Graham Dransfield     

                                                                        Graham Dransfield
                                                                         Legal Director

Date:   July 9, 2007