District line

The District line is a sub-surface line, running east-west, that has opened in 1868, being known as the Metropolitan District Railway, as both the Metropolitan Railway and the District were linked together at several stations. Nowadays, the District line serves 60 stations, from Upminster in east London, to Richmond, Ealing Broadway and Wimbledon in west London. It is coloured green on the modern Tube Map. As of 2022, it is served by the S7 Stock.