I've had pretty much the same crew for all the films that I've made, and I've managed to have really nice, calm, funny people. That is a big part of it, a family feeling of warmth and finding something interesting and making a platform for them to perform. It's a very difficult job, acting, in that it's totally counterintuitive to how we are brought up.

Lots of crime films are about work. Free Fire could have been about a company of plumbers doing pipe-fixing and stuff. But the plumbing film is not so exciting.

Sometimes my scripts get so dissolved, and they're so different from when I wrote them originally, that I find it hard to find what I wrote in it.

I'm very superstitious about going on other people's sets. You have to ask permission of the director; you shouldn't just turn up and skulk about in the background. It's very rude. You have to ask them personally. It's like a vampire being invited into a house.

Doctor Who is pretty dark, I think. Generally its dark; its always been dark.

I think CGI is interesting but it's too expensive and limiting in terms of what you can do shot-by-shot.

There's no way you can shoot low-budget stuff on lots of locations. It's just a practicality thing because every time you move, it costs time and money.