London Underground L Stock London Underground L Stock London Underground L Stock was a clerestory-roofed rail stock built for the District line in 1932 and subsequently absorbed into the London Underground Q Stock, being redesignated Q31 Stock. The L Stock trains were built to provide additional rolling stock for the eastward extension of the District Line from Barking to Upminster. Two new electrified tracks were added parallel to the existing steam-operated LMS lines, including several new stations such as Upminster Bridge. Forty-five cars were built by the Union Construction Company, eight were driving motor cars and the rest were trailers. The eight motor cars,
Upminster road terminating in the town. The M25 motorway is located about to the east of the town centre. Havering Council's urban strategy recognises that nearby Hornchurch is the main cultural hub of the borough with a large theatre and arts spaces, and Romford offers the largest regional concentration of entertainment facilities. Within Upminster is New Windmill Hall, a flexible entertainment space, built in 1968, which holds up to 300 people. Upminster forms part of the tourism strategy for the borough. It is the location of Upminster Windmill, one of the few remaining mills in Greater London and is Grade II*