When I visited coffee farms in Ethiopia, the farmers could not believe we spend a week's wages in their country on a cup of coffee in ours, because they see so little of the profits. Oxfam's fair trade campaign helps right this wrong.

I think that London is very much like that. I find there's humour in the air and people are interesting. And I think that it's a place which is constantly surprising. The worst thing about it? I think it can be smug and aggressive.

I'm fully aware that if I were to change professions tomorrow, become an astronaut and be the first man to land on Mars, the headlines in the newspapers would read: `Mr. Darcy Lands on Mars.

Firth - all dodgy 'tache and frantic eyebrows - has got the sexual allure of a man who runs a swingers' club in Surbiton.

To work effectively in a film, you have to repeat and work consistently. Basically, you shoot a big master then you do close-ups. You're supposed to be in the same moment, the same 30-second moment, for a day.

I do also think it eludes genre a bit - not in any groundbreaking way but you can't quite call it a comedy and you can't quite call it a romantic anything. It's not quite a drama either really. But it has elements of all those things.

Almost every comedy you see is about people making all wrong choices and making all the errors of judgement possible. Good comedy is when it works on this scale. Because it is psychologically very real.