One in 11 children and young people are affected by asthma, which is around three in every London classroom. Air pollution is a major trigger for asthma, which is why we’re doing all we can to help improve air quality in London. As someone living with asthma, I know there’s still more to do. That’s why I’m supporting #AskAboutAsthma and raising awareness of how we can support young people and children not just to manage asthma, but to truly thrive. | Mayor of London