Britannia Social Club?
No, the old hospital is the airports secret building that is hidden by mature trees and is in a dip that sits behind the old Esso fuel farm and backs onto the rear of the Ibis. At the moment it is offices and is also a car hire rental building for sixt
Buster
Yep, the submitted drawings showed its removal but it does appear indeed that you were correct. (we won't mention the multi story sprinkler system)