Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

Hammerson plc

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

An acquisition or disposal of voting rights

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

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

X

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to thenotification obligation: iii

Rockcastle Global Real Estate Company Limited

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

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

04/05/2016

6. Date on which issuer notified:

05/05/2016

7. Threshold(s) that is/are crossed orreached: vi, vii

6%

8. Notified details:

A: Voting rights attached to shares viii, ix

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 x

Direct

Direct xi

Indirect xii

Direct

Indirect

N/A

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

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

% of votingrights

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Cash settled equity swap with full economic effect for Rockcastle Global Real Estate Company Limited (parent company i.e. no subsidiary has an economic interest)

581.50

Monthly cash settlement with renewal of instrument but no formal expiry

47,552,526

Nominal

Delta

6.013%

Total (A+B+C)

Number of voting rights

Percentage of voting rights

47,552,526

6.013%

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

N/A

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will ceaseto hold:

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

13. Additional information:

Rockcastle Global Real Estate Company Limited ("Rockcastle parent company") has a long economic interest in Hammerson plc through an equity swap product held with its prime brokers. The interest is now borne completely by the Rockcastle parent company and no subsidiary company has any economic interest.

14. Contact name:

Nicholas Matulovich

15. Contact telephone number:

+44208 546 0133

For further information contact:

Sarah Booth

General Counsel and Company Secretary

Tel : 020 7887 1000