Chances are, when you do a Michael Caine impression — and don't lie, you have done a Michael Caine impression — it's based not on the man himself, but on the numerous other imitations of the man, stretching all the way from Peter Sellars to Steve Coogan.

But what does Michael Caine's Michael Caine impression sound like?

It's a question few have been brave enough to ask. But Metro World News was not so shy: