London Underground at +420 V, giving a potential difference of 630 V. On the sections of line shared with mainline trains, such as the District line from East Putney to Wimbledon and Gunnersbury to Richmond, and the Bakerloo line north of Queen's Park, the centre rail is bonded to the running rails. The average speed on the Underground is 20.5 mph. Outside the tunnels of central London, many lines' trains tend to travel at over 40 mph in the suburban and countryside areas. The Metropolitan line can reach speeds of 62 mph. The London Underground was used by 1.379 billion passengers in
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