There were basically three themes. One was the sun theme which is the guitar when he'd get sun on his leg and it comes again in the end. And there's of course the lullaby which Dido sang, "If I Rise." And then there's this driving guitar which is the motivation theme.

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

My list would be Russia, Morocco, Turkey, and South Africa I'm doing which is somewhere I've wanted to go, Australia, Japan maybe, and China, if I have the energy to go and play at all those places.

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.

Each one of us has our own evolution of life, and each one of us goes through different tests which are unique and challenging. But certain things are common. And we do learn things from each other's experience. On a spiritual journey, we all have the same destination.

That's a sound design thing but then we wanted to do music that would not disturb it and at the same time drive it.

I've never watched Trainspotting. I just know it's a very critically acclaimed film. In fact, I've never watched any of Danny's movies [means before he met him]. I just worked with him and felt the energy of what he is about initially before I do something. In a way, I think that's why we have discovered each other rather than replicate something else.