It’s going to be the hottest day of the year in the south today, with predicted temperature reaching 28-30 C. So I’m guessing that in the usual British tradition of failing to predict autumn leaves on the line or the impact of snow and ice on the roads we’ll be completely unprepared. The Tube lines and trains will have their heaters on and the buildings will not have the air conditioning set up correctly. It’s going to be an uncomfortable day.