Piece of Cake again, again………….

Sorry to be a pain, but feeling fed up with attempting to redraw a housing estate for the umpteenth time, I decided to have a quick look at RH flying under the bridge, looks more terrifying on DVD than previously published photos.
My simple question is, which airfield was used for the opening sequences, at first I thought it may have been Binbrook, but the control tower is a gem, all I wanted to know is where it is, previous threads don’t say.
Back to the housing estate.