Yes, I know Withams and previously I used to gpo top the MOD dispersal sales (before it went out to civilian auctions) at Ruddington.
Bought a few BSA Bantams and got them registered and sold on.
Went there on once behalf of the Gliding Club looking for a big truck that we could convert to a launching winch.
Surprising what stuff still comes up - a few years ago I bought some stillages of No4 furniture - I sold the last 3 sets to a buyer in the 'Klondike' a couple of years ago.