Great Portland Estates PLC 04 October 2005 Block listing An application has been made to The UK Listing Authority and the London Stock Exchange for a block listing of 18,709,678 Ordinary shares of 12.5p each. The block listing will cover conversions of the Company's 5.25% Convertible Bonds 2008. The shares will trade on the London Stock Exchange and be admitted to the Official List upon issuance. The shares shall rank pari passu with the existing issued shares of the Company. Contacts: Great Portland Estates plc Desna Martin Company Secretary 020 7580 3040 This information is provided by RNS The company news service from the London Stock Exchange