good singers who embrace the gamut of good folk music often are able to approximate almost any dialect/accent they choose. Ewan certainly sang well enough to give ME a feel for the songs...just as Jean Redpath was able to switch into American English 'almost' well enough to pass...she even incorporated examples into her performance to demonstrate how dialects work.

   It can be 'interesting' to read insights by those who know some of the details of a singers past and heritage, but the test is in how well you enjoy the music when listening with your eyes closed.