A & C,
I will bow to your greater knowledge, as I have never flown a Jet. It was however my understanding that the requirement was to do with jet engine spool up times and the potential to need to go round?
I have only seen seven or eight aircraft in this category land, but they all performed the R & B.
>>> If the run and break is part of a practice of a display then ATC should keep the circuit clear untill the practice has finnished.
A lot of this sort of flying goes on at non ATC airfields. I have come across such traffic at Duxford and Kemble, but I have always been well clear to start with.