"What absolute bollocks!"
Which bit?

"I don't remember ever hearing her complain or moan about it"
Shirley has detailed the way that Hutchings, her then husband, publicly flaunted his affair with a National Theatre actress while one of the Albion lineups was working there with Shirley as the singer, at the same time as quite nastily putting down her singing abilities. This apparently triggered her singing confidence problem, from which she's never managed to recover. It certainly came up in an interview in one of the folk mags years ago, and in the book that accompanies the box set of her CDs.