 The headquarters of B.I.S.H.O.P. are in the Centre Point building at  the junction of Oxford Street and Charing Cross Road. An  architectural icon of 1960s London, the building was deliberately  kept empty by property tycoon Harry Hyams for ten years as its value  soared from £5m to £20m while not being liable for taxes as it was  unoccupied. Gerry Anderson obviously decided the ideal location for  a secret intelligence office was an otherwise empty building.