I was re-reading this thread from the start and came across a couple of references (one of them mine) to an un-publicised trip by a Vulcan over the crowd at Leuchars just before it was taken off the display circuit. It was heading straight towards me in what appeared to be a "deep stall" after a slow, tight turn over Guardbridge.
Just thought I would post a copy of the pic I took - Nikkormat FT3 with a 135 lens. I was doing my own developing and printing, hence the poor quality. On looking at it nowadays, I am surprised at how clear the rudder appears. The beast was at full chat yet there is no heat haze blurring the outline. There was an announcement that the display was being curtailed because of a technical fault. I thought at the time it was a euphemism for 'nearly fried the lot of you' but wonder now if there was an engine failure.