Bonnie, on reflection I think you're right. But we were speculating at the time that, because most folk is farmed out to Smooth Ops these days, they may well hang onto the BBC folk archives for Mike Harding's programme. So it's possible that D.I.D really didn't have access to another recording...

Mind you, they managed to get hold of John Reilly - far rarer.

Nick E, I think it's about respect for the performer - any performer - rather than "his" music.

Mind you, one of my favourite things about seeing John Tams live is when he says to the audience: "Go on, have a slice." - meaning "Come on, join in!" But at least you've been asked.