Well, there are three different processes of making a film, of course. They're sort of re-written three times. You write it to start with, and then you shoot it and you re-write it while shooting and you sort of re-write it as you edit.

The culturally specific, in particular, the American porch play that American writers have cherished and loved for many years in terms of their new writing, has seemed to have very little relevance to a much more fast-flowing, abstract, experimental drama that has been emerging in [the UK]. The porch play, not to mention that thing of, Oops, I wasn't loved enough by my father, somehow didn't have the relevance in this country.

There has been one defining production for me in each decade.

Actually, to be honest, this is a useful time to not be knowing what I'll be doing in 2013 or 2014, because really, for the last however many years, I've known what I've been doing for years and years ahead. You get into a cycle of non-reflection, and that gets a bit scary.

Well, there are three different processes of making a film, of course. They're sort of re-written three times. You write it to start with, and then you shoot it and you re-write it while shooting and you sort of re-write it as you edit.

You have to trust your own instincts about what is appropriate and what is not appropriate and trust your own feelings about what you can and can't show for yourself, and it'll be different for everybody.

I'm not really a director for hire. You read these scripts and go, 'This is a really great script, but Paul Greengrass would make this so much better than me.' I usually say, 'I know who would be good for this. It's not me.