By sheer fluke Peter, this from that very NG - from one who was on the spot.
Accident was a stall-spin from low altitude following a downwind turn.
Conditions were quite strong winds (25 gusting 35) and significant
turbulence. The airfield appeared to be underneath a prominent
standing wave most of the day.
As for the fly-in, 51 aircraft, 18 Austers. A good turn up considering
the conditions.