It's a circus life, the movies. It's a lot of travelling, a lot of antisocial hours; there's a lot of it that's about escaping from life.

I've seen a lot of political violence in my life. I know what it looks like. I know what it smells like. I know what motivates young men to do it. I've talked to them about it. I know what victims feel like, you know? I know the abominable effect it has on politics. I know how intractable it is.

Making movies is both entirely ludicrous and incredibly hard. It's a preposterous way to spend your time. You give up a lot for the privilege of doing it, and one of the things you get are relationships of immense trust that you see forged in situations of immense stress.

We're like a travelling circus... We're always on the go.

I spent my 20s making film after film, often in very adverse conditions. You'd fly back from somewhere - Beirut, the Falklands, South Africa - on Saturday, and you'd have 24 hours to cut your film, and it would go out on Monday night.

Whatever your style or subject matter, in the end, film-making is about searching for authenticity - that is what the audience will divine.