46055 has a very mixed van train in tow as it approaches York station passing the yards at Clifton. The first two vehicles are Newton Chambers Mk1 enclosed twin deck Motorail carriers.
Paul Bartlett has some close ups of these vehicles:-
http://paulbartlett.zenfolio.com/brnpccs/ha65c8b9#ha65c8b9
The view is from the bridge at Water End.
Photo dated 29/9/75.
Photographer Barrie Watkins.