47077 passes Bourton on 21 October 1983 with what is either the 6M34 08:00 Llandarcy to Thame, or 6A21 08:00 Llandarcy to Southall. Both these oil trains ran in exactly the same path, on an as required basis, so unless you had some inside gen, there was no way of telling! At this time 47077 was temporarily running without its North Star nameplates (at least on this side), but you can clearly see where the plate was formerly fixed.