Yes, I was indeed that bass player! I recall Disley wandering up and saying "Aha, the old bull fiddle eh? Come and have a go with me and Silvo dear boy". Now, I'm a folkie. I only play in G,D,A or occasionally Em if pushed. He introduced me to this vast audience, turned to me and said "Nuage in B flat". I have to tell you I nearly ruined a good pair of trousers! I'm glad it struck a chord of memory for you.