PT 5786 is seen in it's London Transport Livery at Medstead & Four Marks, March 2019.
A small number of steam locomotives were retained for engineering and ballast trains. Thirteen 5700s were bought by London Transport. They worked permanent way trains and were never used on normal passenger services. Main line running included trips between depots, to Acton Works and runs out to Croxley Tip, near Watford. Three of the LT 5700s lasted until the end of steam on London Transport in 1971 and were the last steam locomotives used for regular mainline working in the UK.