I know FDR\Truman put tons of pressure on Churchhill concerning the Communists. They more or less treated the British as tag alongs. But both World Wars bankrupted the Empire and the British had taxed the people to near bankruptcy as well. Britian was really pretty backwards industry wise as WW1 was not kind to them and it never developed. You are right they had some great inventions but not able to implement them into the War effort like the US did.