Probably the most decisive influence on developing acoustic guitarists on the folk scene these days is a young Glaswegian who hasn't played the folk circuit himself for many months. But although John Martyn is now established quite firmly as an electric rock player, his style and his unique approach to the acoustic guitar have spawned a whole generation of imitators. It is virtually impossible to spend an evening in any but the most traditionally-oriented clubs without seeing at least one guitarist trying to achieve the rhythmic pungency and explosive dynamics which are the Martyn trademarks. And though John's career has led him away from the clubs, his spirit is as dominant now as that of, say, Bert Jansch or Davy Graham in the late sixties.