Oxford is such an unwelcoming city. There are signs everywhere telling you what you're not allowed to do. Don't lock your bike here. Don't even lean your bike here. Keep off the grass, keep out, don't let anyone follow you in, don't take photos, silence please.
Fortunately managed to snap a little photo of Tabitha (the most consistently noisy person in Oxford at the time) next to a sign telling her to do the impossible.