Caoln Moss says "The location is without doubt Wolverhampton Low Level. The carriage sidings behind were for adding/reducing services - six forward to Chester/Birkenhead, so some would be taken off an arriving London Paddington train or adding to the arriving six from the north for London, at least four more.
Wednesfield Road bridge just visible to the left, where the telegraph pole is.
D1007 was new to traffic on 1.8.1962. This will be soon after then, as the loco is still looking new. In any event, small yellow panels were added by 29.11.1962.