Surely with all the ingenuity that Miles Aircraft displayed over the years the possibility of needing fuel and how to launch the M-52 must have been sorted out. After all they were the originators of the key to supersonic flight - the all flying tailplane. I cannot imagine the Miles Brothers scratching their heads and saying "Oh dear we forgot about fuel and getting to altitude!"
Interesting that, like the TSR2, a Labour Government had the airframes and jigs totally destroyed.