68012 at the Midland Railway Centre is not the ex-LNER J94 class loco it seems to be.  This is near-identical loco Hunslet 3193, built 1944 and rebuilt by Hunslet in 1964, originally WD 75142 and more
 recently at Smithywood Coking Plant.  The original BR 68012 was Hunslet 3174, built 1944 as part of the same batch, and was scrapped in February 1968 by Buttigiegs at Newport.

Photo and scan by Les Richardson (les@cirsel.freeserve.co.uk)

http://www.cirsel.freeserve.co.uk/trains.htm