Sets L221 and 63 Royston 030291 A
Cambridge set L221, old heroes 51208 and 54402, with Norwich set 63, confusingly formed 51428 and 54218, arriving at Royston working 1225 shuttle from Cambridge on 3 February 1991. This was one of the few occasions after electrification when a dmu shuttle ran between Cambridge and Royston because of engineering work. I think the three car unit on the other diagram was wheeled out to cope with high numbers of passengers, allowing the two rostered two car units to join up to make a 4 car.
Sets L221 and 63 Royston 030291 A
Cambridge set L221, old heroes 51208 and 54402, with Norwich set 63, confusingly formed 51428 and 54218, arriving at Royston working 1225 shuttle from Cambridge on 3 February 1991. This was one of the few occasions after electrification when a dmu shuttle ran between Cambridge and Royston because of engineering work. I think the three car unit on the other diagram was wheeled out to cope with high numbers of passengers, allowing the two rostered two car units to join up to make a 4 car.