Fay,

Do whatever you want with it.

Martin Carthy explains better than me:

By 1971, I had come to understand that folk music could survive anything that, or anyone else equally well-intentioned could do to it. The sort of mix-up that occured when the folk and rock worls met is the sort of mix-up that has always gone on in folk culture. It is utterly ridiculous to try and keep folk music pure because it has never been pure, it is a mish-mash. The idea of a there being a folk pedigree is a joke