I went to London to do the stuff. I was like "What am I going to do? What's going to happen?" But then once you start working, you forget all that and you start enjoying what you're doing. Once you enjoy the process, you know that people are going to do the same thing. If you don't enjoy it and just do it like a job, then it's going to be feel that way. That's my theory of doing a movie.

The more I compose, the more I know that I don't know it all. I think it's a good way to start. If you think you know it all, the work becomes a repetition of what you've already done.

How we approached this was I wanted this to be personal in a way. It's not a big, epic Hollywood score but really personal and intimate, and we thought guitar would be the perfect instrument for him because he's young and he has an undying spirit and all that stuff and we went on that feeling totally.

I listen to everything. As I told you, sometimes I just want to shut off from music and be silent. Then I play a song and it's refreshing. It's almost like initializing yourself. Recently I was in South Africa doing a press day for my tour. I listened to this band called "Freshly Ground." They were doing a live gig there so that's the last thing I've heard.

I wanted to be part of something bigger

That was a very different emotion and I felt Dido's words would be good and I had a template with my voice in it. Then, when he heard it, he wanted both our voices together in it and that's the scene when he sees the boy and then he gets charged to go on that final cutting effort.

The music had to be rooted, and yet had to branch out,like the wild imagination of a child.