Andy Grant Published: 12:00 PM March 6, 2021 An RAF Corporal delivers a lecture on mooring a barrage balloon to WAAFs in 1942. Practically all balloon sites would be operated by women. - Credit: PA Barrage balloons had been used during the First World War as a defence against low flying aircraft and in 1938 they were once again deployed for defensive reasons, primarily to hamper dive bombers. On February 26, 1939 the Balloon Squadron of the Auxiliary Air Force gave a demonstration of their use and local residents came to witness the winching crews raising and lowering the balloons. How...