State Street Global Advisors 19 October 2006 FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the City Code on Takeovers & Mergers) 1. KEY INFORMATION Name of Person State Street Dealing (Note 1) Global Advisors Company Dealt In Great Portland Estates PLC Class of Relevant Security Ord to Which the Dealings Being Disclosed Relate (Note 2) Date of Dealing 18/10/2006 2. INTERESTS, SHORT POSITIONS & RIGHTS TO SUBSCRIBE Variance of 4,578 due to Transfer Deliver (a) Interests & Short Positions (following dealing) in the Class of Relevant Security Dealt In (Note 3) Class of Relevant Security: Long Short Number % Number % (1) Relevant Securities 4816940 2.95188 (2) Derivatives 0 0.00000 211259 0.12946 other than options (3) Options & Agreements to Purchase/Sell Total 4816940 2.95188 211259 0.12946 (b) Interests & Short Positions in Relevant Securities of the Company (ex.Class Dealt In) (Note 3) Class of Relevant Security: Long Short Number % Number % (1) Relevant Securities (2) Derivatives other than options (3) Options & Agreements to Purchase/Sell Total (c) Rights to Subscribe (Note 3) Class of Relevant Security: Details 3. DEALINGS (Note 4) (a) Purchases & Sales Purchase / Number of Price Sale Securities per Unit SELL 1521 5.71 SELL 10644 5.71 SELL 3387 5.71 (b) Derivatives Transactions (other than options) Product Name (e.g. CFD) Long/Short No./Securites Price/Unit (Note 6) (Note 7) (Note 5) (c) Options Transactions in Respect of Existing Securities (i) Writing, Selling, Purchasing or Varying Product Name Write,Sell No/Securities Exercise Type (eg call option) Purchasing, Which the Price (e.g. USA, Varying etc. Optn Relates European etc) Relates-Note7 Expiry Date Option Money Paid/Received per Unit (Note 5) (ii) Exercising Product Name Number of Exercise (eg call option) Securities Price per Unit (Note 5) (d) Other Dealings (including new securities) (Note 4) Nature of Transaction Details Price / Unit (Note 8) if applicable (Note 5) 4. OTHER INFORMATION (a)Agreements, Arrangements or Understandings Relating to Options or Derivatives Full details of any agreement, arrangement or understanding between the person disclosing & any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated. Is a Supplemental Form 8 Attached? (Note 9) NO Disclosure Date 19/10/2006 Contact Name Peter Shum Telephone Number 020 7698 6132 If Connected EFM N/A Name of Offeree/Offeror With Which Connected If Connected EFM N/A State Nature of Connection (Note 10) Notes: The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk This information is provided by RNS The company news service from the London Stock Exchange