Several days of hot weather mean London is facing an inevitable rise in air pollution as the Olympics get underway. The latest forecast shows pollution levels will be at moderate levels over the next 24 hours in London. The situation is expected to remain unchanged over the next few days.
The main concern is ground level ozone. It forms from traffic fumes in sunny weather, and can cause breathing difficulties.
More top news
Whether it's going to the toilet, paying in a shop or crossing the road, facial recognition technology is changing the way the Chinese live.
Camden Council is evacuating five tower in the Chalcots estate in north London, to allow "urgent fire safety works" to take place.
Rain in places tonight. Turning windy overnight.