Tower Bridge as its northern landfall is in Tower Hamlets. The bridge consists of two bridge towers tied together at the upper level by two horizontal walkways, designed to withstand the horizontal tension forces exerted by the suspended sections of the bridge on the landward sides of the towers. The vertical components of the forces in the suspended sections and the vertical reactions of the two walkways are carried by the two robust towers. The bascule pivots and operating machinery are housed in the base of each tower. Before its restoration in the 2010s, the bridge's colour scheme dated from 1977, when
Richmond Bridge, London Goose", the £3,500,000 yacht of National Car Parks founder Sir Donald Gosling, became wedged under the central arch of the bridge, eventually being freed at low tide the next day. The eighth Thames bridge to be built in what is now Greater London, Richmond Bridge is currently the oldest surviving bridge over the Thames in Greater London, and the oldest Thames bridge between the sea and Abingdon Bridge in Oxfordshire. Richmond Bridge was Grade I listed in 1952 and it is the only Georgian bridge over the Thames in London. Its bicentenary was celebrated on 7 May 1977; the commemoration