In the U.K. I'm probably better known as a comedy writer - or certainly that's my background is in writing comedy.

"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 think people are starting to look away and questioning, and they're sort of horrified.

I did once leave one of [my kid] watching something on YouTube, something completely innocuous, and I went out of the room and the algorithm kept playing the next thing and the next thing and somehow worked its way around to showing him the trailer for John Carpenter's The Thing - at which point I walked back in. He wasn't happy.

In Britain people might know me more for my comedy writing background, things like that.

I think more and more people became aware that social media was starting to feel like a more toxic space. And, I mean - quite a lot of incidents of people getting very, very angry about all kinds of things and attacking people.

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