British Rail Class D16/1

British Railways Class D16/1 or 10000 and 10001 were the first mainline diesel locomotives in Great Britain.  They were built by the London, Midland and Scottish Railway at its Derby Works, using the EE16SVT 1600 hp diesel engine with electric transmission, in association with English Electric and the Vulcan Foundry, with whom the LMS had had a long working relationship. 

References

D16/1
Category:London, Midland and Scottish Railway locomotives
Category:Co-Co locomotives