Hi
We do have Hunters being operated here in Switzerland too. Quite a few. But the real issue why the cannot fly all at the same time, is the lack of sufficient ejection seats. This is a requirement for them to operate. So the operators switch the seats among each other, every year. This means one year you will see the Papyrus Hunter in the air, the next you'll see the Tiger Hunter or the PS Hunter.
Assuming that in UK, they need to have the ejection seat installed, why he did not eject?