Making the films is never easy, but actually that aspect of trying to make a better film or to keep the standard high is something that comes organically.

In some ways, many of the skills you have as a producer on independent films also apply to making big tentpole films: You surround yourself with a brilliant director, great script and talented people in every department who are smarter than you.

Because actually it's really hard to get things made. It takes years. To fight the fights you inevitably have to fight, even when you've produced Harry Potter, you'd better have the commitment and the passion to knock down walls, not take no for an answer.

I don't think you can be a director without a kind of sense of competitiveness.

I got a few things, because I think the props are so beautiful as much as anything else. The detail of the work is something that one has no idea of.

I look forward to having the time and the opportunity to take on new challenges, but I'm also aware that I've loved every minute of the 'Potter 'experience: to make films for an enthusiastic audience and work with great material.

All we try and do is make the best films we can. If you do that then hopefully the audiences will come, and they have. Everything else is gravy.