“Matt Groening rang me up because he’d seen The Office on a flight, ages before it was shown in America. I did a very rough sketch and wrote a song. So the only things that were mine were the song, a couple of jokes and the Wife Swap idea, which was Jane’s anyway. So I mustn’t take too much credit – I said as much once, but they said no, no, that’s always the case. Whoever it says ‘wrote’ the episode goes through the same process. So that made me feel slightly less guilty.”