If I'm at home on my own and the writing isn't going well, I clean my house. And there have been times in the past few years when my house has looked really clean.

Filmmaking is something I have to do. It's not something I particularly want to do.

I love acting. It's the one job I know of where you can go in, go through complete catharsis - emotionally, physically sometimes and mentally - and at the end of the day say, 'See you in the pub, guys.

The fact in acting, you can tap into your darkest moments in life to your lightest moments. And people will watch it, and appreciate it, and even engage with you because of that. That's the greatest job one Earth.

The acting I got into by doing what we call pantomime, when I was sixteen. And, there were loads of very pretty girls in the show. I realized; I found out very early on, that the lead comic gets the girl. So, that was cool. When I went to university, I studied Economic Social History. And drama. That kind of got me into it. My main passion was to make films. It was never to be an actor. At that time, there weren't many opportunities for a working class Scottish actor. It was kind of an English thing. And it required a certain mannered cerebral acting style that I couldn't relate to.

I wanted to dismantle the bollocks that there's a military structure to a gang, with a leader, second leader, the good looking one, first babe, second babe. It's far more arbitrary than that and their values shouldn't be romanticised. They aren't something you want to sign up to.

A script is utterly useless in and of itself; it's only of any worth the minute your actors, your designers, your directors come into being.