If you don't practice for three days, everyone will notice." It's something you have to really maintain. So unfortunately, I don't play it that often but I may take it up again. If you don't play for a while, you just can't hit the notes. It's like going to the gym. If you go and do weights, you can lift x amount of weight and if you don't go for ages, you've gotta start again and start from the beginning. So it's a bit like that. It's just a muscle.

I had friends who ran off to become ski instructors or worked in cool bars, and I often envied them, but I know I'd quickly become bored with that kind of life. I always need to push myself.

Obviously, you never shoot the scenes of a film in order or only very rarely.

I think we can't feed the amount of people that are on this planet the way we are doing it.

I grew up in London, and that's where I spend most of my time. Unless I have a really good reason not to be, I'll always be in London.

I looked pretty crazy but at the time, you don't think anything of it. You think, "I've got an amazing job. I'm working and this is cool." I remember I was being fit to go to a premiere for something at Burberry and Christopher Bailey, who designs the clothes there, saw a picture of me and I looked weird. I had short black hair, hardly any eyebrows, I looked very very thin and he went, "We need to put Douglas in a campaign." So four days later, I was shooting a Burberry campaign because he had seen me looking crazy from the show so that was kind of funny.

Sometimes things are nothing on paper, but a genius director turns it into something amazing.