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 in Great Warley. Land for Upminster Park was purchased by the parish council in 1929. The town forms part of the Hornchurch and Upminster UK Parliament constituency, and is covered by the Havering wards of Upminster and Cranham. The current MP is Angela Watkinson. Each ward elects three councillors to Havering London Borough Council. All six councillors elected in 2010 for the two wards were the Upminster and Cranham Residents' Association candidates and the area is unusual in that the residents' association is strongly active. From 1945 to 1974 Upminster formed part of the Hornchurch constituency and from 1974 to