Heres a twist to the "celtic" bit. When I lived in Wales, I have, on more than one occasion played tradional Welsh tunes to Welsh people and been accused of playing Irish music. Not because of the way I was playing them but because the people, including some older ones were simply not aware of thier own tradition - harps and choirs, yes but "diddly music" no way...

There are of course good efforts to keep this Welsh music alive and some excellent bands and I think awareness is increasing (in spite of the "celtic" meaning Irish/scottish).

Jon