I used to see RH on the display circuit and during a 'tent tea break' he related how he managed to wrangle a Tempest flight when attending a gunnery shoot in Germany.
He may have even 'swooped a ride' in whatever Jet he was there with.
The upshop was only the ground engineers were allowed to organise the starting of the monster, and he recalled the difficulty of climbing up the oil smothered wing, and after the start the whole front of the engine cowling seem to be doing a figure of 8 through the smoke.
I wonder if he ever put all down in writing.