well we're not going to sort this out. however you've heard my solution to your problem often enough.

The Gallagher brothers of Oasis fame have always named the Dubliners as one of their main influences. That's one of the directions folk music has gone. And when a kid turns up at your folk club singing the theme song to the Royle family - he's really only a spit and a fart away from roots singers.

The whole point about the purity of folk music - it never was pure.   The ploughman took his memory of a song and reworked it. how many hands did Henry martin pass through before it became the Lofty tall ship, or vice versa...who knows?