Blocklisting Interim Review

Great Portland Estates PLC
06 October 2006

                       BLOCK LISTING SIX MONTHLY RETURN

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

To:   The FSA 
Date: 6 October 2006

Name of applicant:         Great Portland Estates plc

Name of scheme:            Conversion of 5.25% Convertible Bonds 2008

Period of return:          From: 6 April 2006   To:    6 October 2006

Balance under scheme from previous return:             18,002,583

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             250,966
scheme during period:

Balance under scheme not yet issued/allotted at        17,751,617 
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      163,432,872 
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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