Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Hammerson plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

Yes

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

 No

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

 No

An event changing the breakdown of voting rights

 No

Other (please specify):

No

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

Sumitomo Mitsui Trust Holdings, Inc.

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

The Sumitomo Trust & Banking Co., Ltd

Nikko Asset Management Co., Ltd

STB Asset Management Co., Ltd

Chuo Mitsui Asset Trust and Banking Company, Limited

Chuo Mitsui Asset Management Company, Limited

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

2 February 2012

6. Date on which issuer notified:

6 February 2012

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

 Below 3.0%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

 Ordinary shares

GB0004065016

21,676,374

21,676,374

20,626,929

2.90%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/ConversionPeriod

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exerciseprice

Expirationdate

Exercise/Conversionperiod

Number of votingrights instrumentrefers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

 20,626,929

2.90%

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

Chuo Mitsui Asset Trust and Banking Company, Limited and Chuo Mitsui Asset Management Company, Limited are direct subsidiaries of Sumitomo Mitsui Trust Holdings, Inc.

Nikko Asset Management Co., Ltd. and STB Asset Management Co., Ltd are direct subsidiaries of The Sumitomo Trust & Banking Co., Ltd., and The Sumitomo Trust & Banking Co., Ltd. is the direct subsidiary of Sumitomo Mitsui Trust Holdings, Inc.

The Sumitomo Trust & Banking Co., Ltd.:(Direct)691,559-0.097%

Nikko Asset Management Co., Ltd.: (Direct)18,086,752-2.542%

STB Asset Management Co., Ltd.:(Direct)241,533-0.034%

Chuo Mitsui Asset Trust and Banking Company, Limited:(Direct)1,489,346-0.209%

Chuo Mitsui Asset Management Company, Limited:(Direct)117,739-0.017%

Proxy Voting:

10. Name of the proxy holder:

The Sumitomo Trust & Banking Co., Ltd.

Nikko Asset Management Co., Ltd.

STB Asset Management Co., Ltd.

Chuo Mitsui Asset Trust and Banking Company, Ltd

Chuo Mitsui Asset Management Company, Ltd

No proxy has been appointed by any of the direct shareholders notified in part 9.

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

N/A

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

N/A

13. Additional information:

N/A

14. Contact name:

 Sarah Booth

15. Contact telephone number:

 020 7887 1065