Incredible machine, as a boy I remember reading about the Fairey Rotodyne and I made the Airfix model, - and made another rather better one a few years ago too!
In those days the Roodyne and the TSR2 were "The Future" and thus exciting almost beyond belief to a boy.
I remember various routes were discussed including one from central London to London Airport (LHR). Sorry I cannot remember any more details!