The Mayor of London, Boris Johnson, said: ?The world?s first Ultra Low Emission Zone is an essential measure to help improve air quality in our city, protect the health of Londoners, and lengthen our lead as the greatest city on earth. ... Together we can ensure everyone who lives, works in, or visits our city has the cleanest possible air to breathe.? It's another flawed Boris Johnson idea that local Labour government have adopted with glee abandon.