Today I visited a playground just outside the North Circular where community group @mumsforlungs have installed an air quality sensor to monitor pollution. The health of Londoners across the capital is being damaged by air pollution and I’m doing all I can to improve it. The latest data shows how important it is to take bold action that benefits all Londoners. If the ULEZ is expanded, five million people living in the outer boroughs would also be able to breathe cleaner.