Technology is a global thing and wherever you go, people are prodding the same devices and worrying in the same way and have had their lives slightly altered in the same way.

We've got characters in the UK like Boris Johnson, who's kind of like a proto Trump in many ways even down to the crazy blonde hair. Then Mayor of London, now Foreign Secretary, Boris Johnson was widely seen as a cartoonish oaf and that made him strangely undentable as a politician. No one could land a blow on him because he was already ridiculous.

Obviously, you try not to repeat yourself so that forces you to re-evaluate what you're doing constantly [in Black Mirror].

Women - why aren't you running the world yet? Frankly I'm disappointed in you. Men are still far too dominant for their own good, and consequently we've made a testosterone-sodden pig's ear of just about everything: politics, the economy, religion, the environment ... you name it, it's in a gigantic man-wrought mess.

In many ways, Big Brother is the present day equivalent of a 1980s Club 18-30 Holiday - flirting, sunbathing, silly little organised games, and lots of people you'd like to remove from the genepool with a cricket bat.

I pitched Jay Hunt the opening scene (prime minister, middle of the night, he's woken up...). She paused, and then she laughed. She was very intrigued and all that, and then she said, "Does it have to be a pig?" So we went through various options: Could it be a supermarket frozen chicken? A giant wheel of cheese? A pig seemed just the right level of absurd, but then when he walks in and there's actually a pig there, it's awful.

While I was thinking about that, the military, I read a book called On Killing, about the obstacles people have to pulling the trigger in combat. So sometimes you just absorb all this stuff without realizing you were doing research.