At the other end of the spectrum, George Gideon Oliver King Rameses Osborne, the fourteen-year-old novelty Chancellor and future baronet of Ballentaylor and Ballylemon - a man so posh he probably weeps champagne.

Our four-year-old, like a lot of kids, you introduce him to an iPad and he quite quickly gets drawn in in a way that you're like, "Wow, I've got to stage an intervention here." He picked up on gaming terminology really quickly. If you say, "Keep practicing holding a pencil and see if you can draw a letter, the alphabet," he understands that if you do that you've unlocked Level Two.

"National Anthem" was just a funny idea I'd been knocking about. I initially thought about a beloved celebrity having to do that - and then I watched an episode of 24. In my head, I was writing almost a parody of a 24-style president woken in the middle of the night with a crisis. It seemed more interesting to play it ultrastraight and to have the viewer's initial reaction be one of laughter and disbelief - and just have the whole thing become progressively more uncomfortable.

I'm known as being a massive dweeb who's into video games and so on.

I think overseas viewers assume that Black Mirror is written by the Unabomber, essentially - a Ludd­ite, technology-hating, angry old man waving his fist at the App Store.

My continuum? Blimey! For me,Black Mirror is all part of the whole.

You don't have the economy of scale of building a set once and casting once. You blow up the world, basically, at the end of each episode.