During 1991 there was an unusual Cheltenham to Oxford and return passenger working, bringing a Regional Railways Class 155 to the Great Western Mainline. The line saw an intensive HST service, but DMUs on the route were very unusual, as all the local stations had been closed in 1964. 155333 is pictured approaching Circourt Bridge, Denchworth, in lovely evening light on 28 June 1991 with the 2B22 19:46 Oxford to Cheltenham Spa service. A little earlier it had passed by in the opposite direction with the 2A35 17:37 Cheltenham Spa to Oxford train. Both workings traversed a very rare section of track for a passenger train - the curve between Didcot North & Foxhall Junctions at Didcot.