LMS No. 10000 and 10001 were the first mainline diesel locomotives built in Great Britain. They were built in association with English Electric by the London, Midland and Scottish Railway at its Derby Works, using an English Electric 1,600 hp diesel engine, generator and electrics.

Under British Railways, the locomotives became British Railways Class D16/1; they were initially operated primarily on mainline express passenger services on former LMS lines, both in single and in multiple. In 1953, they were transferred to the Southern Region for comparison with Bulleid's British Rail Class D16/2 diesel locomotives.

Both locomotives were withdrawn and scrapped in the 1960s. In 2011, the Ivatt Diesel Re-creation Society announced plans to build a replica of no. 10000, using contemporary parts as well as new build components.

The society has sourced a Mark 1 English Electric 16SVT diesel engine dating to the 1940s and the sole remaining Metropolitan Vickers bogies dating from the 1950s, formerly used by a class EM2 electric locomotive in England and the Netherlands. These bogies are of the same design as on the original 10000 although with weaker springs, which will be replaced. The society has purchased Class 58 diesel 58022 which will be used as the new locomotive's chassis.