BEB
Circuits were: normally/flapless flown at 1000ft QFE, glides at 1500ft, low-level 500ft. All over approximately the same ground track, so downwind spaceing picture (roundel v runway varied).
Very rarely on your own. Worked well with 4 perhaps 5 in including formations. Of course when you went somewhere like Coningsby you could easily have 6 or more types with LH and RH circuits being used simulataneously, but then it relied on impressive ATC and sound awareness in each cockpit.
As for infringing ATZs and RA(T)s etc, I very much doubt the military guys are top of the list!