Post Office Tower, London, c 1970s.
© Science Museum / Science & Society Picture Library
The tower, originally known as the Post Office Tower or GPO (General Post Office) Tower, was opened to the public on 19 May 1966 by Tony Benn (the Postmaster General) and Billy Butlin. After a bomb exploded in the building in 1971, the tower was closed to the public. It is currently owned by British Telecom and has been renamed the Telecom Tower. The concrete and glas structure is 175 metres high, and with the aerial the total height is 188 metres.