Hi Phil
thanks for today, I cannot remember if you have these further back in the thread but the NLS map site for SJ in 1890's-1910's has this, so a bit earlier than you want, but what is interesting to me is that A) there are 2 turntables behind the goods shed, B) the current void in the air photo of the present buildings is precisely the footprint of the goods shed (run mouse round one and watch the second cursor trace the route on the other), and C) the dotted line to the SE of the shed running parallel to the line 'appears' to correspond to the wall we were discussing earlier
webref is here, this should give 1:25inch and satelite comparison if I've got it right
http://maps.nls.uk/geo/explore/side-by-side/#zoom=19&lat=50.7631&lon=-3.0659&layers=168&right=BingSat