Central line (London Underground) and Great Eastern Railway buildings east of , from when the line to Epping was a rural branch line. In terms of total passengers, the Central line is the busiest on the Underground. In 2011/12 over 260 million passenger journeys were recorded on the line. It currently operates the second-most frequent service on the network, with 34 trains per hour (tph) operating for half-an-hour in the westbound direction during the morning peak, and between 27 and 30 tph during the rest of the peak. This makes the Central line the busiest and most intensively-used railway line in the United Kingdom:
London Underground L Stock numbered 700-714 (even numbers only), were initially owned by the London Midland and Scottish Railway. The L Stock was based on the 1927 K Stock. The conversion from L Stock to Q31 Stock took place in the late 1930s, with the major modification being the conversion of the hand-operated sliding doors to air operation. The last Q Stock trains were withdrawn in 1971. 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