Pace, I have just had another look at your first transmission on this thread. A question occurs to me: did you file an airmiss? if not, why not?
The chaps who follow these things up are very resourceful. It is always educational to read their comprehensive reports. I am wondering if it was a motor glider in some form in that unlikely place or somebody sliding back to Dunstable after a day in the wave over the Black Mountains. . . . . .
Probably not an astronaut, though UFO's are spotted from time to time......