I do aim not to sing in fake accents. I think it's very patronising. If I walked into a pub in many parts of Glasgow and started putting on a fake scottish accent (my middle name being "MacDonald", and all) I'd be lucky to walk out alive.

THe problem is that I speak RP with the corruption of a few years in Australia when I was rather young, so I finish up sounding like nothing on earth, and I don't know any Martian folk songs.