Recently I stepped out of my door and a very drunk man sitting opposite shouted the N-word. I turned the corner and I saw a black policeman so I went up to tell him that we had a drunk and disorderly situation on the street, but when the copper turned around he was sweating and breathing heavily and looked otherwise preoccupied. I was halfway through my story when he stopped me, sighed and said, very sweetly: ‘Listen, I’m in the middle of chasing down a perp — could you maybe call the police?’