London Underground with smaller trains that run in two circular tunnels ("tubes") with a diameter about . These lines have the exclusive use of a pair of tracks, except for the Piccadilly line, which shares track with the District line between Acton Town and Hanger Lane Junction and with the Metropolitan line between Rayners Lane and Uxbridge; and the Bakerloo line, which shares track with London Overground services north of Queen's Park. Fifty-five per cent of the system runs on the surface. There are of cut-and-cover tunnel and of tube tunnel. Many of the central London underground stations on deep-level tube routes
Upminster 2010 it formed part of the Upminster constituency. Upminster is within the Havering and Redbridge London Assembly constituency and the London European Parliament constituency. Upminster rises to about above sea level to the north and is about above sea level to the south. It rests on a layer of loam, above sand and gravel in the south and London Clay to the north. It is bounded in the west by the River Ingrebourne and there is a stream running east-west, just north of Corbets Tey that has been dammed to form a lake. It has formed part of the continuously