C941 (51922, 59694 & 51562) passes Hallen Marsh Junction on 15 August 1987 with the 16:34 Severn Beach to Bristol Temple Meads service. There was certainly plenty of variety in use on this line at the time, with a Class 121 single unit turning up on the next train, and a Class 117 on the one after that. Note the cloud of pollution drifting off to the right from the various industrial plants.