31439 descends into the Severn Tunnel at Pilning on 11 October 1986 with the 1V62 12:10 Portsmouth Harbour to Cardiff Central service. Although booked for a Class 33, it wasn't that unusual for Class 31/4s to turn up at the time. But given the excellent autumn lighting, it was definitely a welcome bonus. It would certainly have been a day out to the seaside for this loco, as the day's diagram saw it visiting Southampton and Weymouth, as well as Portsmouth!