The list of cover versions of this fabulous and inspirational song is longer than you might think. Those by Maggie Boyle, Brian Peters and Dick Gaughan are specially treasurable, the Bert Jansch and House Band ones are pretty fine, and I can recall hearing another two, by singers in the "non-professional" category, that have much to commend them. I may be mistaken, but I don't think it's in Raymond G's repertoire. And yes, it can work well unaccompanied too.