'Post 9/11 Blues' is an observational satire about the surreal circus of fear at that time. It's a generational thing.

A Harvey Nicks chick with throwaway morals and a trustfund appetite.

Maybe I don't ever fully switch off, but I think the way I offset that is by splitting my time between film and music. I always want to challenge myself and grow, fail, self-flagellate, and then try again.

It's interesting that we assign the label 'political' to art that doesn't just fit a mould of status quo. Is 'Downton Abbey' not political? That's political! Every piece of art offers a perspective on the world. And what is politics if not a perspective on the world? 'Downton Abbey' is about class. It's also about race.

The only people who have doubts about the sincerity of my music are people who come to it relatively late, off the back of having seen me in a film. Acting is about being other people, and music is about being myself.

I get good references from a wide range of music. Something who's been a good influence in the last few years is Qawwali music. If you listen to a Qawwali singer like Aziz Mian - he's like James Brown. Qawwali is like Pakistani gospel-jazz. It's emotional, but it's also improvised, and it's all about that sacred-and-profane tightrope.