The weathering on that loco is just sublimeAnother which seems to have been camera shy 3834
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Just looking at your backscene roofline, have you thought of putting television aerials on the chimney stacks - they were a very obvious accoutrement on late 50s/60s buildings in the days of analogue VHF television.
This is what I remember them looking like. Leeds 1970 from the National Media Museum Collection.