British Rail 10100
 British Railways 10100 was an unusual experimental diesel locomotive known informally as The Fell Diesel Locomotive (after Lt. Col. L. F. R. Fell who was one of the designers). It was the joint production of Davey Paxman & Co Shell Refining & Marketing Co and Lt-Col L. F .R. Fell built for them by the London Midland and Scottish Railway at Derby. Sir Harry Ricardo was also involved. By the time it emerged in 1950 nationalisation had taken place and it carried British Railways livery.