In reply to Bob Kemp:
Thanks for sharing the links.
I was a Fine Art student with John back in the 70s, he was in the year below me and I remember the day I first heard him play guitar. We were all sat around playing guitar (or should I say trying to play guitar) passing round a guitar to play our party pieces, John then picked up the guitar and wow he was fanctastic. Needless to say I never attempted to play a guitar in front of him again, he was very grounded and a thoroughly nice bloke. RIP.