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–Aylesbury line Vale Parkway has no previous data for the first five years as it only opened in 2008. London–Aylesbury line The London–Aylesbury Line is a railway line between London Marylebone and Aylesbury, going via the Chiltern Hills; it is operated by Chiltern Railways. Nearly half of the line is owned by London Underground, approximately – the total length of the passenger line is about with a freight continuation. The line is part of the former trunk route, the Great Central Main Line. The route towards Aylesbury opened in stages between 1868 and 1899: The Great Central Railway (GCR) decided to build