Chessington World of Adventures sits in a bowl near the A3. I went in the 1970s when it was a zoo, home to some unhappy orangutans who lived in a cage which made me scream. Being a lonely sort of child, I hugged concrete dinosaurs in the rain. Now it is owned by Merlin Entertainments – a sort of National Trust for people who prefer rollercoasters to country houses – which is owned by a hedge fund that employs teenagers.