Circle line (London Underground) Widened Lines which are currently used by Thameslink services. The line continues underground after Farringdon station; there are bay platforms at Moorgate station. After passing through Aldgate station, the terminus of the Metropolitan line, the line joins the District line shortly before Tower Hill; this part of the line includes stations on the Victoria Embankment, on the north bank of the Thames, as far as Westminster station. West of Gloucester Road station the line turns off the District main line to join the District line's Edgware Road branch just before High Street Kensington station. In Bayswater the line is in
London Underground infrastructure London Underground infrastructure The infrastructure of the London Underground includes 11 lines, with 270 stations. There are two types of line on the London Underground: services that run on the sub-surface network that is just below the surface and use larger trains, and the deep-tube lines, that are for the most part self-contained and use smaller trains. Most of the lines emerge on to the surface outside the central area. The oldest trains running on the Underground were introduced in 1972. The Underground is electrified using a four-rail system, the DC traction supply being independent of the running rails. Planned