55012 was new in May 1958

It became 977941 as a route learner for Loadhaul, then EWS.

circa 1996		At Knottingley. Tim Moss
30/6/07		Stored at Thornaby. Daniel Adkins

It is currently (Nov '07) owned by EWS and stored at Thornaby, where it's been since at least Jan '04.