Addition
Retired BA/BY
I lived down the road from Kemble and I'm pretty sure there were 2 crossover collisions - the date you gave sounds right for the first and the other was a couple of years later and involved a former leader down from MOD for a visit. IIRC he was the leader in 1970 when my crew on 30 supported them to Cologne/Bonn and then back to Farnborough for the '70 Air Show, still September in those days. We gave a few of them a lift back to Fairford, where I guess they got MT back to Rissie. Just checked my logbook and we had started from Gaydon where they were temporarily detached - runway resurfacing perhaps at Kemble?
The name Dennis Hazell keeps coming into my head - apologies to all if that's wrong!
PS Are you the guy I met at Stack Butterley's house in the early 90s?