My early memories of guests that impressed me were, Shirley Collins, Trevor Lucas, Hedy West, A.L.(Bert) Lloyd, Michael Cooney, Ewan McColl & Peggy Seeger and of course Martin Carthy.
Later on people like The Dransfields, Young Tradition, Swan Arcade, Mr Fox (aka Bob & Carole Pegg), Nic Jones, Tony Rose and so many more inc of course Martin Carthy. P.S.( Anyone remember the New Modern Idiot Grunt Band?)
Cheers
Les