I've never played a gay character on screen, so that would be interesting. I've never played a gay character, and that would fascinate me because I'm not gay, so that would interest me.

I have friends who are leading men, and they're only ever allowed to play leading men of a certain type. But as a character actor, there's a wider variety of projects available. On the big Hollywood films, all they care about is having their lead in place, so it's actually easier for someone like me to slip in. And I'm happy to do so.

As a working-class actor, leaving school with no qualifications, being a printer and then becoming an actor and then working with people who to a certain extent had had a leg up. I never had that advantage. It's less an artistic need to express myself and more a need to prove myself.

I think one of the London Film Festival strengths is that it's set in London but it's not about London. It's about the diversity of this city and it's about world cinema. And that's what London is - London is a place where its identity is always in a state of flux. So, this festival celebrates the way in which it is always changing. That's why London is a fascinating place and that's why the film festival is a fascinating film festival.

It's a very fascinating thing for an actor to play somebody who is suffering, and you have to express the suffering, but in an inarticulate way and sometimes a dysfunctional way, through violence.

The trick to acting is not to show off; it's to think the thoughts of the character. I was lucky because when I started acting, it was doing jobs above pubs. I learned to act in anonymity, so by the time people saw me, I knew what I was doing. I was crap for years, but no one saw me being crap. It's a trade you learn.

There's no great mystery to acting. It's a very simple thing to do but you have to work hard at it. It's about asking questions and using your imagination.