Here is another Quora link for you to ignore.
Was British prime minister Neville Chamberlain’s decision to invest heavily in fighter squadrons and development of radar the main reason Britain was the victor in the Battle of Britain? Would Britain have fallen if not done in time?
Yes, and Chamberlain in particular should be credited with three specific calls that he made and persuaded his cabinet to agree to:
[*]Invest in fighter defence over strategic bombers, against the RAF’s own wishes. Chamberlain didn’t subscribe to the Trenchard philosophy of strategic bombing (which in turn came from Douhet), and advocated for the RAF to have a defensive strategy. He also believed fighters were cheaper than bombers, which was no small part of his motivation! Pressure from Chamberlain in particular was one of the reasons for the formation of RAF Fighter Command in 1936.
[*]Invest in single-seat fighters, particularly the Spitfire, over other types, like turret fighters (a design that one W.S. Churchill was a big advocate of). Chamberlain even spoke about the need for single seat fighters in the commons in May 1938, and had advocated their prioritisation even earlier when he was Chancellor of the Exchequer. No doubt he was getting technical advice from somewhere, but he made the right call.
[*]Munich. For all the negative things that can be said about the Munich Agreement, it gave Britain, and the RAF in particular, time to grow its air defences. At the time of Munich, Fighter Command had just 25 squadrons, but by the eve of the Battle of Britain, they had 58, and even more importantly, because of Chamberlain’s earlier pushes for the creation of shadow factories, the British were out-producing the German aircraft industries (which is even more impressive when you realise a Spitfire took three times as many man-hours to make as a Bf 109…)
Chamberlain himself wrote to his sister in July 1940 and said, “If I am personally responsible for deficiencies in tanks and guns, I must equally be responsible for the effeciency of the RAF”, and he wasn’t far wrong.