Circle line (London Underground) with the other London Underground sub-surface lines: the Hammersmith & City line from Hammersmith to just before Aldgate; the Metropolitan line from Baker Street to Aldgate; and the District line from Tower Hill station to Edgware Road station. The line is electrified with a four-rail DC system: a central conductor rail is energised at and a rail outside the running rail at , giving a potential difference of . The running rails are not electrified. Much of the double track railway from the Hammersmith terminus to Westbourne Park station is on a high brick viaduct. East of Westbourne Park the
London Bridge station service in trains per hour (tph) is: The typical weekday off-peak services in trains per hour (tph) is: The Thameslink timetable through London Bridge was introduced in May 2018. The typical weekday off-peak service in trains per hour (tph) is: The Underground station is served by the Jubilee line and the Bank branch of the Northern line. In , it was the station on the network with million users. It is the only station on the London Underground network with "London" in its name (while the NR termini are named, for instance, "London Waterloo" the Underground station is simply named