 In the early 1990s the number of passengers using the branch stabilised at about 800 people each weekday . In 2009 the Chesham branch saw 427 @,@ 000 journeys each year . The proposal to close the Aylesbury – Marylebone route was dropped , and instead the line was upgraded and equipped with fast British Rail Class 165 trains in the early 1990s . These reduced the travel time between Chalfont & Latimer and Marylebone to 33 minutes , increasing usage of the line as a commuter route . The Chesham branch was proposed as a terminus for the original Crossrail scheme , which would have seen Crossrail trains running from Paddington to serve the stations between Rickmansworth and Aylesbury and the Chesham branch , allowing London Transport to withdraw from Buckinghamshire and cut the Metropolitan line back to serve only the branches to Watford and Uxbridge . The bill proposing the scheme was defeated in Parliament and abandoned in 1995 , and the revived scheme authorised by the Crossrail Act 2008 did not include the branches to Aylesbury and Chesham . By this time the little @-@ used Central line branch from Epping to Ongar had closed , with the last services running on 30 September 1994 , leaving Chesham — already the westernmost point of the London Underground network since 1961 's withdrawal from Aylesbury — as the northernmost point on the London Underground . 
