I had the pleasure of seeing John Martyn live at the Barbican Hall in November 2008. He did the 'Grace And Danger' album in it's entirety, plus other tracks including 'Solid Air'. An absolutely brilliant gig. People wouldn't leave, even after two encores! R.I.P. John Martyn.
Best thing they ever did was Fly Like An Eagle (IMO). I thought I was so cool listening to that on Radio Caroline when everyone else was listening to Abba on Radio 1.