No.5551 The Unknown Warrior is a "rebuilt" or replica LMS Patriot Class steam locomotive which is under construction in the Midland Railway – Butterley's West Shed. The locomotive is a "rebuilt" of the final 'Patriot' class locomotive to be built, No.5551. The original locomotive was built in May 1934, and withdrawn in June 1962 (it was scrapped that October). Unlike the original engine, which never received a name, the replica will be named "The Unknown Warrior"; the name was chosen by public poll.