Great Portland Estates PLC 09 October 2006 Letter to Great Portland Estates Plc Dated 05 October 2006 Companies Act 1985 ("The Act") - Part VI I hereby inform you that as at 04-October-2006 Barclays PLC, through the legal entities listed on the attached schedule, has a notifiable interest in the capital of your Company of 5.22% Details of this interest, together with a breakdown between registered holders (as required by Section 202(3) of the Act), are enclosed. The issued capital of 163,432,872 is the latest figure available to us. If this is incorrect please let me know. From Geoff Smith Barclays PLC LEGAL ENTITY REPORT GREAT PORTLAND EST SEDOL: B01FLL1 As at 04 October 2006 Barclays PLC, through the legal entities listed below, had a notifiable interest in 8,531,431 ORD GBP0.125 representing 5.22% of the issued share capital of 166,432,872 units. Legal Entity Holding Percentage Held Gerrard Ltd 111,576 .0683 Barclays Global Investors Australia Ltd 14,186 .0087 Barclays Global Investors Japan Trust & Banking 193,808 .1186 Barclays Capital Securities Ltd 2,567,103 1.5707 Barclays Life Assurance Co Ltd 190,782 .1167 Barclays Global Investors Canada Ltd 11,955 .0073 Barclays Bank Trust Company Ltd 4,320 .0026 Barclays Global Investors, N.A. 1,087,475 .6654 Barclays Global Investors Ltd 1,691,338 1.0349 Barclays Global Investors Japan Ltd 16,145 .0099 Barclays Capital Inc 1,166,847 .7140 Barclays Global Fund Advisors 1,475,896 .9031 Group Holding 8,531,431 5.2202 REGISTERED HOLDERS REPORT GREAT PORTLAND EST SEDOL: B01FLL1 As at 04 October 2006 Barclays PLC, through the registered holders listed below, had a notifiable interest in 8,531,431 ORD GBP0.125 representing 5.22% of the issued share capital of 163,432,872 units. Registered Holder Account Designation Holding BANK OF NEW YORK 12,160 BARCLAYS CAPITAL NOMINEES LIMITED 2,567,103 BARCLAYS CAPITAL NOMINEES LIMITED 1,166,847 BOISS NOMINEES LTD 4224361 154,237 Barclays Global Investors Canada 11,955 Barclays Trust Co DMC69 C 000000000000000000 4,320 CHASE NOMINEES LTD 16376 82,013 CHASE NOMINEES LTD 28270 57,927 Greig Middleton Nominees Limited (GMI) 3,000 INVESTORS BANK AND TRUST CO. 982,338 INVESTORS BANK AND TRUST CO. 1,475,896 JP MORGAN (BGI CUSTODY) 16331 41,560 JP MORGAN (BGI CUSTODY) 16341 91,295 JP MORGAN (BGI CUSTODY) 16400 1,304,743 JP MORGAN (BGI CUSTODY) 18409 150,345 JPMORGAN CHASE BANK 5,327 JPMORGAN CHASE BANK 14,186 JPMorgan Chase Bank 11,341 JPMorgan Chase Bank 193,808 Mellon Trust - US CUSTODIAN/ 7,179 Mitsui Asset 2,926 R C Greig Nominees Limited 94,260 R C Greig Nominees Limited GP1 1,757 R C Greig Nominees Limited SA1 3,120 R C Greig Nominees Limited a/c AK1 5,129 R C Greig Nominees Limited a/c BL1 3,110 R C Greig Nominees Limited a/c CM1 1,200 STATE STREET BOSTON 80,471 Trust & Custody Service Bank 1,878 Total 8,531,431 This information is provided by RNS The company news service from the London Stock Exchange