Blocklisting Interim Review

Great Portland Ests.
16 October 2006




                         BLOCK LISTING SIX MONTHLY RETURN

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



To:   The FSA 

Date: 16 October 2006


Name of applicant:         Great Portland Estates plc

Name of scheme:            Conversion of 5.25% Convertible Bonds 2008

Period of return:          From:  7 October  2006      To: 16 October 2006

Balance under scheme from previous return:             17,751,617


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


Number of securities issued/allotted under             145,161
scheme during period:


Balance under scheme not yet issued/allotted at        17,606,456
end of period


Number and class of securities originally listed       18,709,678 Ordinary 12.5p
and the date of admission                              shares 7 October 2005


Total number of securities in issue at the end of      163,578,033
the period

Name of contact:                                       Desna Martin

Address of contact:                                    33 Cavendish Square
                                                       London 
                                                       W1G 0PW
                                 

Telephone number of contact:                           0207 647 3093

SIGNED BY     
Company secretary for and on behalf of

GREAT PORTLAND ESTATES plc
Name of applicant


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




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