21st July 1996 at Barton. I'd just taken off in the Chippy before the Mossie display and was aerobatting a few miles north so didn't actually see it except on video later.
Although the primary reason was negative 'G'-induced failure of one engine during a 'wing-over', not mentioned in the AAIB report was the 'wing over' technique being employed by the pilot. Some experienced aeros pilots who witnessed the display and crash have told me they think it should have been.
SSD