Bell X-1
There are a few mentions of the Bell X-1 here but perhaps the posters should google the Miles M52.
I believe that the X-1 was a reworked M52 after Miles were told to send their design to the USA as part of the war reparations. The Air ministry spec for the M52 was published in 1943 with innovations such as the all flying tailplane, which Chuck Yeager publicly said was the most significant part of the X-1, and the intakes used on the SR71 specified already as designed by Frank Whittle, all back before 1943!
An interesting read. The M52 was due to be flown by Capt Eric Winkle Brown.
MM