To echo what maxdrypower said:
Mate of mine was an instructor at an airfield not a million miles from Camberley. In those days, the RA's had re-equipped with Hawks, but were still based at Kemble.
My mate sends up a student for his first solo late one summer sunday(but within notified ATZ hours), he has a handheld so he can monitor his student's RTF calls, and he stood out of doors to watch him fly the circuit. All went well until student turns base leg, when suddenly out of nowhere, just as the student throttles back and starts descending, these nine red painted Hawks appear flying east to west, pass UNDERNEATH the student and straight over the airfield at about 500ft! My instructor friend didn't hear them call on the RTF, nor did the FISO, so you can only assume they infringed the ATZ without clearance. Not surprisingly, the student was somewhat upset about this. My mate phoned me next day and explained what had happened asking me what action he should take, but as soon as I mentioned form-filling, he unfortunately lost interest.