Diesel locomotives have seen limited use on the London Underground, largely because exhaust gases cannot be discharged when the vehicles are working in tunnels. A prototype diesel engine numbered DEL1
Ex-London Transport Sentinel shunter DL83 at the Nene Valley Railway
London Underground Schöma locomotive No.4 Pam.
A class 66 in Metronet livery
London Underground battery-electric locomotives are battery locomotives used for hauling engineers' trains on the London Underground network where they can operate when the electric traction current i
London Underground diesel locomotives
…diesel engine numbered DEL120 was built in 1939 from two 1915 stock motor cars, which was expected to be part of a batch of ten, but experience with battery locomotives showed that these were a better alternative. Three 0-6-0 diesels (DL81-DL83) were obtained in 1971, to replace the last steam engines, but were too…
Preserved L35 at the London Transport Museum in November 2005
A battery-electric locomotive at Euston station, April 2006
Locomotive L16 seen at West Ham station (District line platforms).
LT battery-electric locomotives at Croxley Tip, 1971