B978 (53927 & 54214) passes Severn Tunnel Junction on 15 April 1991 with what is presumably either a crew training run, or an ECS working, as no passenger train matches up with this in the working timetable. The fact that the destination blind says Cardiff, when it has come from that direction is no help, as trains in passenger service where often just as helpful! The unit had recently transferred down from the north, where it was Longsight set LO269. Unusually the LO289 set number was not only applied on the front, but also underneath the vehicle number. Bristol soon applied their set number to the front, but obviously didn't look on the side!