"I see no problem whatever with attempting to Anglicise, say Scots or Irish songs into the way you speak."

Indeed, Jim. Some years ago, I was asked by a Scottish bloke to perform "She Moved Through The Fair" with him. So horrified was he by the way that I sang it - in my normal Kent accent - that he refused to play with me ever again. I did, however, find that I really enjoyed singing it, and have continued to do so up to this day, still in my own accent, of course. And do you know, it always goes down well, and I've had no complaints from Scots either!