From the origins of net centric warfare in the 1940s, the Stage Plans of the 1950s, and the change of threat from aircraft to the ballistic missile, Battle Flight examines the steps taken to protect the British populace from nuclear Armageddon. Following WWII, Britain's air defences comprised a mix of interceptors and anti-aircraft guns that were tailored to counter mass bomber raids by piston-engine aircraft. These defences were rendered obsolete by the jet engine and the atomic bomb and the search for a cost-effective anti-aircraft system began. Interceptors were the obvious first line of defence and would remain so to this day, but unguided rockets and new surface-to-air guided-weapons (SAGW) were also examined. Wartime advances in guided weapons had ended, the teams dispersed, and the work forgotten, but such weapons were soon prioritized.