Mick,
45s and 47s often turned up on the Carlisle. When it first started it was booked for a GD 47, it then became a 31 with 5 mk1s during the week, 31x2 and 10 mk1s, however it soon became obvious that the 3s could not always keep time so it became a 47 job when load 10 (11 on the outward trip from Hull to Leeds with the addition of the empty newspaper GUV).
Carlisle would often pinch the locos that went north in the morning a substitute something they wanted rid of, quite often a western 47 would turn and at least 5 shove duffs turned up.
Regards
Al Taylor