Have you seen Cowspiracy? It takes a lot more land to feed a meat eater than to feed a vegan or a vegetarian. It's something I'd love to get into but it's very hard to persuade people to stop things they've been doing for a long time. So maybe it needs to start with the next generation. Everyone needs to raise their children with a bit more responsibility.

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.

When I do go to L.A., it is usually for a reason - to meet with a director or something - but I'm always so happy to go back to London.

[London is] one of the best cities in the world. There is just so much culture there and so much history and so much diversity. It's just a perfect place to grow up. I studied at the Guildhall every Saturday so I'd always be in town every weekend doing that. I was kind of a city boy really.

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

I love to ride horses. I've ridden since I was a kid so I got to do some riding, which was a lot of fun. But most of the stunts were left to the girls. It's the girls rescuing the guys mostly. So it was kind of really kick-ass, girl power. It was wonderful to watch. It was particularly sexy. They would come in and just slay in these choreographed pentagram of death fight scenes. It was pretty impressive.

I wanted to become an actor. I went to Guildhall School of Music and Drama, which is one of the main drama schools in London where you go when you are older. But I was doing the junior one when I was a kid. And some friends there had agents. I was fourteen and I was like, "I want an agent! It sounds awesome!" I had no idea what that was. I thought those guys looked like men in black. They were hanging around in suits all the time. So I luckily got a very good agent in London and started auditioning. And then when I was 16, I got my first film and I've been working ever since.