I don't dispute your first sentences but cannot support your last.
But this unsupportable twaddle?
As it was, the Americans nicked the all moving tailplane that Miles invented for it, which is the only reason they got the Bell X1 to break the sound barrier.
NO the Americans did NOT "nick" the all flying tailplane. This is a well debunked conspiracy theory/myth.
Go to the RAES lectures archive to discover the truth.
From the Horse's mouth - lecture by Capt. Eric 'Winkle' Brown.