Even though one of them is about an Edinburgh junkie and ones a little boy of eight in Manchester, you want them to always portray their world in such a vivid way that the audience can disappear inside the story.

Always changing genres, making very different films is a good idea. It's a way of making yourself feel vulnerable again, getting back to that innocence. As is working within a circumspect budget.

There's lots of things that can be solved with cash.

As soon as you think you can do whatever you want and you have whatever great professional in the world waiting to work with you, then you are sunk.

I trained in the theatre.

The great thing with film is that it doesn't have an ego. It's just a film. Everybody that makes them has an ego, and the problem with awards and stuff like that is that it always affects the egos, and everyone gets stained by it in some way. And that can be fine and very innocent, but it can be horrible as well.

Everybody knows Aaron Sorkin's scripts. There's a huge amount of lines. There's a huge amount of interchange. You gotta do a lot of learning to be able to get it up to pace.