Signal box, South Eastern Railway, ex Borough Market Junction, London Bridge. Built in 1895 to standard South Eastern Railway design. Equiped with Westinghouse K frame in 1928. Closed in 1976, when London Bridge power box was opened.
This signal box was said to be the busiest in Britain. At peak times two signallers dealt with 100 trains an hour. It controlled Borough Market Junction in London, where the lines from London Bridge, Cannon Street and Charing Cross converge. It was originally mounted on top of a brick tower that provided a good view over the lines that the signal box controlled.