Great Portland Estates PLC 16 March 2007 TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES (1). Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: GREAT PORTLAND ESTATES PLC 2. Reason for the notification (please state Yes/No): ( ) An acquisition or disposal of voting rights: ( ) 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) : DECLARATION OF MAJOR SHAREHOLDING AS PER FSA TRANSITIONAL PROVISION 7 ( X ) 3. Full name of person(s) subject to the notification obligation: GOVERNMENT OF SINGAPORE INVESTMENT CORPORATION PRIVATE LIMITED 4. Full name of shareholder(s) (if different from 3.): SECURITIES MANAGEMENT TRUST LIMITED AND NORTRUST NOMINEES LTD (AS REGISTERED HOLDERS AND NOMINEES) 5. Date of the transaction and date on which the threshold is crossed or reached if different): N/A 6. Date on which issuer notified: 16 MARCH 2007 7. Threshold(s) that is/are crossed or reached: ABOVE 3% 8. Notified details: A: Voting rights attached to shares Class/type of shares Situation previous to if possible using the the Triggering ISIN CODE transaction Number of shares Number of voting Rights ORDINARY SHARES OF 12.5P EACH N/A ISIN GB00B01FLL16 Resulting situation after the triggering transaction Class/type of shares Number of shares Number of voting rights % of voting rights if possible using the ISIN CODE Direct Direct Indirect Direct Indirect 5,868,011 5,817,057 50,954 3,525 0.031 B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Date Exercise/Conversion Number of voting % of voting financial Period/ Date rights that may be rights instrument acquired if the instrument is exercised/ converted. N/A N/A N/A N/A N/A Total (A+B) Number of voting rights % of voting rights 5,868,011 3.556 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: Proxy Voting: 10. Name of the proxy holder: N/A 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: 168 ROBINSON ROAD CAPITAL TOWER #37-01 SINGAPORE 068912 14. Contact name: LIM YOKE PENG 15. Contact telephone number: +65 6889 8680 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): Contact address (registered office for legal entities): Phone number: Other useful information (at least legal representative for legal persons): 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 : This information is provided by RNS The company news service from the London Stock Exchange