I assume the shed is Polmadie - this is a 1973 view
Not a bad guess Wes but the shed is Grangemouth. Polmadie was demolished and the site turned into a depot for the Coaches used on the West Coast Main Line passenger trains and is still in use with Virgin Trains today for servicing their Pendolino trains.
However you are quite correct in saying they are Class 37s in the photos, not Deltics.
Alasdair