35005 1965-05-23 where?
The Warwickshire Railway Society Rail Tours 'Merchant Navy Locomotive Tour to Swindon & Eastleigh'. This is on former GWR metals between Salisbury and Westbury transferred to the Southern Region (hence the painting out of the GWR) on the route Salisbury - Warminster - Westbury - Trowbridge - Melksham - Chippenham - Swindon (for a visit to Swindon works).
Note the cast ron sign 'G.W.R. (painted over) Passengers must not cross the line on the level' attached to an old piece of broad gauge rail.