I make films about working class people.

If people are worried about the size of their trailers, I kind of say their priorities are off.

I understand working-class culture, tribalism and the ethos of violence, so I make films about these things.

The SAS is the most elite of the special forces in the world. They are not people who go out and advertise; they keep it inside. They don't want anybody to know about them.

My creative partner is a writer, and he's got an executive producing credit on this film. We've made three films together and I would never underestimate the impact of a writer.

It's very clearly stated in the film: You make your own choices, and what you're always fighting is ego.