PS - by folklore I mean the accumulated feral secretions of all humanity not just the so-called folk. Folklore is the spontaneous cultural rampancy that comprises a goodly proportion of the living waters in which we swim. I don't mean such unnatural contrivances as Morris Dancing and Jacks-in-the-Green, but I do mean everyday religious observance, ritual and customary usage, most of which is of no interest to folkies because it is not proper folklore. Getting back to Richard's point, proletarian musical experience in the UK is seen as not being folk because it no longer includes Child Ballads or Broadsides or derivations thereof* rather pretty much everything but.

* We had Steve Roud on here a while back saying Shoals of Herring was now a proper Traditional Folk Song with its very own Roud Number because it had been collected from a bona-fide Traditional Singer. Naturally I find this utterly absurd and contrary to the known laws of the cultural universe in which there exist no bona-fide anything, but there you go!