I think we all mistake certain things for happiness. I think we mistake comfort for happiness and we mistake pleasure for happiness, and entertainment for happiness, when really these are just things we use as proxies for our happiness. We use them to cheer us up or try and achieve brief happiness, when really happiness is something much more profound and long lasting and exists within us.

My worst job was packing animal feed in a warehouse in Gloucestershire when I was a student. It was a very strange environment. It was hung heavy with oat dust, the place was infested with mice, and everyone who worked there was over 60, and I was 18. It was crazy. Apologies to anyone who works in animal-feed packing industry and loves it.

Being a geek is extremely liberating

Suddenly, the world I had scrutinised for so long was all around me, as if I had leaned forward and climbed into the television like Alice through the looking-glass. I had no idea just how deep the rabbit hole would go.

The thought of filming in London was a big draw because I could stay in my house. I read it, and I was really taken with it because it felt at once very unapologetic for what it was, which is a romantic comedy. But at the same time, a little spiky and a little truthful.

I used to lie in bed in my flat and imagine what would happen if there was a zombie attack.

In the most basic terms it was about how when we experience art without critical awareness we consent to the ideas being promoted, either intentionally or unintentionally, by the filmmaker. For instance, if you watch a racist comedian and laugh at his jokes, you are consenting to the prejudices inherent within them. Similarly, if you watch a movie which perpetuates conventional ideas about race, gender, etc., you are consenting to them and not affecting change in any way.