Where I live, in Middlesbrough, the place names are Scandanavian in Origin. This is true down much of Eastern England.

Elswhere in England place names are Anglo Saxon in origin. There are in fact very few place names in England which are Celtic in origin. The main one are river names and a few prominent landscape features.

I believe that the British Isles has a shared heritage of traditional music with local variations. Tunes, both song and dance, have found their way all over both the UK and Ireland so that it is difficult to say where many of them originated. They way the tunes are played varies from place to place, however.

An interesting example I came across last week when a tune I learnt a few years ago as a morris dance tune turned up as the tune to a Scottish song which I learnt at Folkworks summer school recently.

I think the term "Celtic Music" smacks of marketing dept. speak and as such is meaningless. Add to that it is all too often used, incorrectly in many cases, as a synonym for "Irish Music". I once saw a review of a Kathryn Tickell CD refer to her music as "Celtic music" which it most definitely is not. That was the point when I fully realised what a meaningless term "celtic music" was.