My book tells me that this is the 3.45.p.m. from Paddington to Fishguard Harbour taking the Badminton route thereby avoiding Bristol before running down to the Severn Tunnel and West Wales . Old Oak Common's 4082 , " Windsor Castle " seems to have been given an indifferent tender of coal before she left home as she lays a formidable smokescreen across the Gloucestershsire countryside but it certainly adds to the lucky photographer's picture , unplanned as it might have been. The engine is , as we all know , really 7013 , "Bristol Castle " the pair having exchanged identities in early 1952 and never regaining their original and respective name or numberplates. This" Windsor Castle " seen here was withdrawn from Gloucester in 1964 whilst the " real " one ended its days at Tyseley the following year , bearing its false " Bristol Castle " identity to the end.