Biggest damn wasp I’ve ever seen!

Dad sent me these photos of the remains of a gigantic wasp / hornet / monster from Dr Who which he had a “titanic struggle” with, after coming across it in his tool shed. “It was a nasty brute” reminisced Dad, “but the 12 bore took him out easily enough”. If anyone knows what this is, or how prevalent they are in Turre, we would be grateful to know.