I have to write for everyone. What really fascinates me is how you make films or make stories that can genuinely be shared by different groups.

The thing that influenced me most in relation to 'Nanny McPhee' were the Westerns I watched with my father. All the Spaghetti Westerns; all the Virginians; all the High Chaparrals. Because if you think about the form, it's a stranger from out of town.

I hate the way market forces try to separate us out in to the appropriate demographic - basically in order to sell us things. We need to find stories that we can enjoy together, not separately.

I think it's [the AIDS fight] the most important and most pressing one - I think it's a global emergency and I think in a way we all have to address it and engage with it because I think it's the biggest threat to the human race that we have ever faced.

We all need somewhere where we feel safe

But certainly in Uganda, Mozambique and South Africa, people don't really talk about sex and certainly religious leaders - some of them - up to now have been very unwilling to accept, for instance, the promotion of condom use

I'm an atheist. I suppose you can call me a sort of libertarian anarchist. I regard religion with fear and suspicion. It's not enough to say that I don't believe in God. I actually regard the system as distressing: I am offended by some of the things said in the Bible and the Qur'an and I refute them.