I thought it was all to do with the all flying tail that Miles aircraft developed and given to the Americans
Crash, read my posts in the link provided, it provides the story.
Nothing on the M.52 made it into the X-1. Pitch control was supplied by two completely different avenues. The M.52 had what these days is referred to as a "slab", and is to be seen on F-16, F-15, Tornado. The hinge moments on a supersonic aircraft such as the M.52 with this type of tail requires powered controls. The X-1 tail set up was of a stabiliser on which its incidence could be altered for trimming purposes by a pneumatic motor powered by compressed nitrogen. Attached to the stabiliser was the elevator which was powered purely by pilot muscle through mechanical linkages.
It is unfortunate for history that the false stories, myths, call them what you will, propagated by Eric Brown have become institutionalised facts.