Hmmm. All I found on the Web is this page, which has a couple of nice MP3 samples and a photograph that certainly isn't raunchy. The MP3's are certainly worth a listen.
If I recall correctly, the Witches have some connection with Maggie Boyle and had an appearance at Whitby Folk Week last year. If they're the group I'm thinking of, I really enjoyed their singing.
-Joe Offer-