I was looking at the entry for Shakin' Stevens (I don't know why*), and found out that he had played gigs for the YCL.
ETA: * Actually, I do. I was looking up Stuart Colman, who was a member of Pinkerton's Assorted Colours, one hit wonders mentioned in PopMaster, and also Flying Machine, another one hit wonder, before unexpectedly becoming a Radio 1 DJ playing rock & roll, then championing (and later producing) a rockabilly cult icon called Michael Barratt