Here’s what it’s like interviewing Benedict Cumberbatch: a bit like interviewing a waterfall. It won’t really answer any of your questions, but it’s fabulous to watch. It’s not that it’s trying to ignore or avoid your questions – God, no. It is endlessly, eagerly forthcoming, and shows a touching courtesy towards the whole notion of being interviewed. It will tell you a story about being stung on the penis by a sea anemone in the same breath as discussing the panic of entering the library at Harrow for the first time.