H and H - sadly I think I know who you refer to in your comment about a friend dying on a navex with a student - he went through his QHI course in the early 90s when I was teaching on it.
[email protected], that fits timewise. TG was the Instructor, not sure who the Stude was. I had moved on to Vl by that time. IIR, they were heading back to Cu from Shawbs down the Wye Valley on a low level Navex when they caught a wire. So v sad! I believe it was all over in seconds....
Sorry for the melancholy thread drift......
H 'n' H