What a bizarre and petty and hateful comment to pointlessly resurrect an ancient thread with. "Shames the whole folk scene"?!! Fuck off, you odious, cowardly little shit.

Couldn't a moderator just close this thread please?

It's particularly pointless (and potentially hurtful) given the fact that - whether you liked her voice or not – Shirley Collins has been physically unable to sing for many years now.
I believe the condition might be called dysphonia, though what it's called isn't important.