Getting back to the veiled aircraft at High Ercall, I’m guessing a Beaufighter with an early ASV radar, although I haven’t been able to find a picture of a suitable array that matches the shape under the veil.
The shape looks much more like a Lichstenstein array than any British radar I can find.
OK, belay all that gibberish above. If I had bothered to follow the 1456 Flight clue, I would have guessed Turbinlight Havoc!