Having worked through from Plymouth Class 31's 31412 & 31123 are detached from the 'Humber Harrier' railtour at Barnetby, they will run light engine to Immingham for refuelling while Class 20's 20051 and 20015 wiill take the train to Cleethorpes, 7/11/81. ©John Chalcraft/Rail Photoprints