Peter Kerslake says "It looks like there may be a problem here as the driver of 70003 John Bunyan is having to top up the oil in what looks to be the connecting rod bearing, and it may be that it has been running hot. The location is Cambridge in 1954/5 but I am not sure now at which end of the station my picture was taken. The fireman is looking at his driver and probably wondering whether or not they are going to make it! A number of the Norwich to Liverpool Street expresses ran via Ely and Cambridge in both directions as not all of them took the faster and more direct line via Ipswich."