It's interesting that people seem to be able to sing in a variety of accents, much more effectively than they can speak in different accents. I heard a beautiful torch singer doing U.S. vocal "standards" in a swanky hotel in Warsaw last year, and I was sure she was from the U.S.
Nope, Warsaw native, she said, in heavily accented English.

I can't say MacColl is a favorite of mine. I have always thought of his accent as somewhat of an affectation, and it bothers me. That, and I think if he lived next door to me, he'd be a really fussy neighbor, somebody you could never relax and have a beer with. Maybe I'm wrong.

-Joe-