 The present building, originally known as Faraday House, was designed by the architect A. R. Myers for the Office of Works and completed in 1933.It was erected on the former site of Doctors' Commons, which had been the location of the Admiralty Court, Probate Court, and the principal ecclesiastical court in England.The Post Office’s first London telephone exchange served nearly of the capital – notable subscribers included the Treasury, the War Office and Fleet Street.