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.

Like behind the car or in the pub, to do a scene, a proper nice dramatic scene, it's always a treat. And they're usually shot as one, so you've got a big chunk of dialogue to learn, and you feel like you're working.

If there is no fate and our interactions depend on such a complex system of chance encounters, what potentially important connections do we fail to make? What life changing relationships or passionate and lasting love affairs are lost to chance?

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.

Having done Spaced, I can't even remember it being that difficult on Spaced, but we know what the end's going to be like. We know why we're putting in this amount of work, or why a shot might be particularly tricky, because we know that what we do is create a whole package. It's the writing, the performances, and the style of camerawork, that's what we're working toward, and we're prepared for that.

Every person should have their escape route planned. I think everyone has an apocalypse fantasy, what would I do in the event of the end of the world, and we just basically - me and Nick - said what would we do, where would we head?

I just love listening to the laughter.