Just had an email from a friend who was also at the display - reminding me (with his tongue in cheek) of CAP 403 - Chapter 4
4.6 Rotorcraft must not be flown in such proximity to spectators' enclosures, buildings or aircraft on the ground as to cause a possible hazard either from downwash or as a result of control difficulties. Similarly, helicopters with underslung loads should only be flown over clear areas.
5 Overflight of Spectators
5.1 Display aircraft are not permitted to overfly the spectator enclosures or Car Parks unless with the specific written permission of CAA FOI (GA). Outside the display area, normal Rules of the Air apply.
Now he says "SB would have known and complied with all the rules and is a great pilot and example to all of us, even Q could learn from him".....
It made me smile anyway 