These two (Steve Coogan and Rob Brydon) have the best Michael Caine impersonations that I’ve ever heard and the scene is hilarious to boot. This clip is from The Trip. I haven’t seen the film yet, but it’s on my list.
Side note: If you say ‘my cocaine’ it sounds like you’re saying ‘Michael Caine’ in Michael Caine’s accent. Go on, give it a try; you know you want to.