In the background is the Newton Abbot Breakdown train, I think it was re-allocated to Exeter when NA was downgraded to just a fuelling point.

Peter Kerslake says "D810 "Cockade" entered service from Plymouth's Laira depot on the 16th. September of 1959, later moving to Newton Abbot in August of 1967 then returning to Laira in January of 1972 from where it was condemned on the 4th.of December of that same year.
38 of the "Warships" were built at Swindon with an additional 33 coming from the Glasgow works of the North British Locomotive Company, the last to come from Glasgow being D865 "Zealous" in June of 1962 just before the Company ceased to operate!
Early days saw the class rostered on tightly timed passenger duties between Paddington and Bristol, displacing the earlier and unreliable "600" series."