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 S Stock (ex-Metropolitan Railway) London Underground S Stock (ex-Metropolitan Railway) S stock is the designation given to one train of eight cars by London Underground in the 1930s. It was composed of converted trailers and experimental driving motor cars inherited from the Metropolitan Railway in 1933. In 1919, the Metropolitan Railway converted six 1904 saloon stock cars into the "Hustler train". These were the only cars of this type: two were driving motors, two were control trailers, which the Metropolitan called driving trailers, and the remaining two were trailers. In 1936, the two driving motors were converted into trailers, and all six cars were