140. This is the airfield side of the old Flying Wing HQ building.   The curved addition on the top of the nearest round projection, is the old ATC Local Control.   This has now been moved to the new extension to the tower on top of Hangar 3 (Old 93 Sqn and 2 Sqn Hangar).   (Click to see the story of the building of the original tower.)   (Thanks to Norman Giffin.)