So here in deepest Sunbury-on-Thames we are now not only being entertained by a rather different selection of helicopters from normal but also by an almost daily parade of low-level light singles. It was interesting to see an elderly Piper Cub a few days back, then a C150 yesterday and today an RV7 has buzzed over at 900 feet and headed up to central London. Since fellow residents are now asking me what this is all about, I'm wondering whether anyone on here can advise as to what rules (if any) have changed in the current situation to allow this? Or is it simply that with so little airline traffic at the moment ATC is grateful for anything to control, however small?!