On a Grantham-Peterborough local with a 6 wheeled ex-NER van leading the train.
Peter Kerslake says "The last of the class, and the last of the ten later classified as B12/2s, 61580 was numbered 8580 from new.
Seen here on the "race track" at Essendine on the East Coast main line 61580 has just two coaches and a van in tow it was one of three allocated to Grantham at this date and is, therefore, almost certainly working between Grantham and Peterborough North."