Circle line (London Underground) the stations are shared with one or more of the three other sub-surface lines, namely the District, Hammersmith & City and Metropolitan lines. On the Circle and Hammersmith & City lines combined, over 114 million passenger journeys were recorded in 2011/12. The first section became operational in 1863 when the Metropolitan Railway opened the world's first underground line between Paddington and with wooden carriages and steam locomotives. The same year a select committee report recommended an "inner circle" of lines connecting the London railway termini, and the Metropolitan District Railway (commonly known as the District Railway) was formed to build
Wimbledon, London Queen's Road and Wimbledon Bridge. The architects were Bradshaw Gass & Hope. By the 1930s, residential expansion had peaked in Wimbledon and the new focus for local growth had moved to neighbouring Morden, which had remained rural until the arrival of the Underground at Morden station in 1926. Wimbledon station was rebuilt by the Southern Railway with a simple Portland stone facade for the opening of a new railway branch line from Wimbledon to Sutton in 1930. Damage to housing stock in Wimbledon and other parts of London during the Second World War led to a final major building phase,