Blind Will: the meaningless I referred to was in the essential basis of your discussion, which is the difference between Celtic music and English music. Now, that inplies that there are two categories of music, Celtic and English, that you can put certain pieces of music into. I disagree with the equivalence of the two categories: broadly speaking, my attitude to the term "Celtic music" is "there aint no such animal".
   This usage of the term celtic is based on the scholar who recognised and discussed the fact that there was a family of languages(Cornish, Irish, Scots gaekic etc) that had certain characteristics that distinguished them for teutonic languages(Englis, german, danish etc) and also from Romance languages(Latin, Spanish, French etc). Fine, a very valid bit of classification. But to extend this concept to the modern excesses of the term, when Galicia has become a Celtic speaking nation(oh yes???), when English speaking Ireland is Celtic but English speaking England is not, when certain English songs suddenly become "Celtic" overnight because Clannad has recorded them: at this point it becomes gibberish, and you wish the word has never been used. The whole of northwestern Europe(maybe the whole of northern Europe) used to speak Celtic languages. Now most of them dont. Interesting history, but not a necessarily useful basis for describing current cultural and musical differences. Abololish the word, I say. it causes more problems than it solves. (It is cognate with "Welsh", incidentally, and seems to mean "foreign").