“The thing I've realized — the thing which is really important when you're trying to two weekly cartoons every week — is, whenever I have an idea, I need to make sure I get it in the book and get it noted down because you can very quickly run out of ideas or have a bad week with no ideas. So I absolutely need to keep them as much as I can when I get them. I have a long file on my phone of notes, which I tap in when I'm walking along or on the bath or whatever. And I've got a small notebook I carry in my coat, where I scribble things down, and I’ve got my main sketchbook where I'm always writing down notes and things. So it's just a mania these days of keeping notes and having these piles of generally bad or half-finished or half-thought-through or maybe even seven-percent-thought-through ideas.”