The rock who instructed on my range supervisor course told us he had been supervising a range at Catterick when they spotted 2 x A10 approaching. He fired a red verey at them and told us 'he must have seen it, I saw it bounce off his canopy'.
I've watched them at Holbeach. Very impressive the way they head straight towards the car park, then stand on their wingtip and do a 90 deg turn in a very short radius. Then you see a spurt of smoke from the nose and hear a high pitched buzz which is the sound of the cannon. The target they were using was abeam the control tower as with the GAU 8, the safety trace for the normal target (being used by Harriers firing SNEBs) would have covered most of Boston!