I can think of 3 exceptions. All have the same kind of academic/aristocratic sounding accent: Simon Peyton Jones, Lindybeige, and Rowan Atkinson (in Jonny Engl

I can think of 3 exceptions. All have the same kind of academic/aristocratic sounding accent: Simon Peyton Jones, Lindybeige, and Rowan Atkinson (in Jonny English, and possibly in Blackadder too). For a time, I thought that's how British sounded like… Then I saw Life on Mars.