 The last scheduled London Transport steam passenger train on the branch left Chesham at 12 @.@ 11 am on 12 September 1960 . 1 @,@ 917 passengers used the line that day , in comparison with a typical Sunday usage of around 100 . Earlier on 11 September descendants of the Chesham residents who had attended Watkin 's original meeting to promote the railway , along with 86 @-@ year @-@ old Albert Wilcox who had been present at the opening of the line , rode the steam shuttle to Chalfont & Latimer and back , and attended a ceremony in Chesham 's Council Chamber . ( Although the 12 @.@ 11 am service from Chesham on 12 September 1960 was the last scheduled London Transport steam service to use the line , a steam train left Marylebone for Chesham each morning at 3 @.@ 55 am to deliver newspapers , returning as the first passenger train from Chesham at 5 @.@ 58 am . This journey to Marylebone was open to the public but was unadvertised and did not appear in published timetables . This arrangement continued to be operated by steam locomotive until 18 June 1962 . ) The Ashbury passenger cars , which by now had each covered around 800 @,@ 000 miles ( 1 @,@ 300 @,@ 000 km ) , were retired from service . The last steam @-@ powered passenger services on the remaining non @-@ electrified section between Amersham and Aylesbury ran on 9 September 1961 . The line between Amersham and Aylesbury was handed over to British Rail , leaving Chesham as the westernmost point of the London Underground network . The goods yard at Chesham was closed in 1966 , and a train hauled by a former GWR 5700 Class locomotive removed the track from the goods yard , the last steam service to use the line . On 17 October 1967 the newspaper train service and its return journey to Marylebone , by this time worked by a British Rail diesel multiple unit , was abandoned , leaving the branch exclusively operated by London Transport trains . 
