Newly renumbered from 08247 and used internally at Polmadie until May 1978 when she reverted to her TOPS number and was replaced by 08173 which was also re-numbered PO 1! When I first saw her I noted that the former capital stock number had been very well removed - not just an overpaint job, and I distinctly remember wondering why a capital stock loco was permanently allocated to internal use at the depot, I still have not received a satisfactory answer!