Ex-works 37083 (with experimental sealed front end door) of Gateshead depot passing through Gloucester with a coke train from Llanwern, 16th August 1979. This was the first 37 to be tested for eliminating draughts from the redundant gangway doors. At the No. 1 end (seen here) the entire front was welded up. ©Gordon Edgar/Railphotoprints.co.uk