When did you last go to London? Oh, I don't know really. I suppose it was about 30 or maybe even 40 years ago. As long as that? You wouldn't recognise it now. Has it changed very much? Oh, yes! It's changed beyond belief. It's a lot bigger of course and it's been cleaned up quite a lot. What about the fog? Oh, London doesn't have fog any more. That's all disappeared and the air has been cleaned considerably over the last 30 years or so. Do you think I'd still recognise it? Of course you would. Parts of London haven't changed very much at all, but in other areas the change is incredible. Is that cinema still open, the one at the corner of the street where I used to live? You remember it, the "Rex", I think.