I'm on the tube in London, in the heatwave. There have been delays on the lines due to the heat that has caused signal failures and all sorts of problems. I had to wait at St Paul's station for about 20 minutes before I could even find a tube that I could get on. At Mile End the train stops and a young woman in army combat fatigues steps on with a large duffel bag. An elderly gentleman gets up from his seat and offers it to her (she politely declines).