Blocklisting Interim Review

Great Portland Estates PLC
19 October 2006


                       BLOCK LISTING SIX MONTHLY RETURN

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

To:   The FSA 

Date: 19 October 2006

Name of applicant:                           Great Portland Estates plc

Name of scheme:                              Conversion of 5.25% Convertible 
                                             Bonds 2008
                             
Period of return:         From:              17 October 2006 To: 19 October 2006

Balance under scheme from previous return:   17,606,456

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   322
scheme during period:

Balance under scheme not yet issued/         17,606,134
allotted at end of period         

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

Total number of securities in issue at       163,578,355 
the end of 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

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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