Blocklisting Interim Review

Great Portland Estates PLC
06 April 2006


                      BLOCKLISTING SIX MONTHLY RETURN

INFORMATION PROVIDED ON THIS FORM MUST BE TYPED OR PRINTED ELECTRONICALLY.


To:  The FSA

Date: 6 April 2006       


1. Name of applicant:   Great Portland Estates plc



2. Name of scheme:      Conversion of 5.25% Convertible Bonds 2008



3. Period of return:    From:  7 October 2005   To:  6 April 2006


4. Balance under scheme from previous return:   18,709,678



5. The amount by which the block scheme has been increased, if the scheme has 
been increased since the date of the last return:   -



6. Number of securities issued/allotted under scheme during period:  707,095



7. Balance under scheme not yet issued / allotted at end of period:  18,002,583



8. Number and class of securities originally listed and the date of admission:

              18,709,678 Ordinary 12.5p shares     7 October 2005

9. Total number of securities in issue at the end of the period: 163,181,906


Name of contact:    Desna Martin


Address of contact: 33 Cavendish Square
                    London 
                    W1G OPW

Telephone number of contact: 0207 647 3093


Signed by: D Martin

Company secretary for and on behalf of


Name of applicant:  Great Portland Estates Plc


If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.





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