42905 1949c St Rollox.
Lamp post(left) and two runs of overhead cables match with 41128 41126 1955-09-19 St Rollox-ROneg-567
Carrying 12A Carlisle Kingmoor shedplate which became 68A from 6/50 until 1/58, so this is probably when the loco was recorded on St Rollox shed, ex works, on 17 April 1949.