GWR 0-6-0PT possibly 2728 at Swindon

The numberplate is almost illegible - you reach a point where pushing the magnification up is counter-productive. As for the location - the buildings look more like workshops than engine sheds - but I could well be wrong!
2728 was withdrawn in 1948. Locos ending their working lives sometimes ended up shunting around Swindon Works, so this could have been around 1947/8