I was one of the Air Cadets trying to hold the crowd back in 1980.
We all saw him go in, the wingtip vortices were absolutely thick white smoke as far as I can remember.
There was an awfulness about those final few seconds, when you absolutely, positively knew, he was never going to make it.
Wasn't there something about the aircraft being out of C of A as well? I may be wrong on that point though.