Introducing Ulez was my hardest decision as mayor of London – but now we know its astonishing impact | Sadiq Khan

Critics said I was attacking motorists. It’s more important for me that the city’s children are no longer breathing dangerous levels of pollution Ulez led to better lung size and function among London children, study finds When I introduced London’s clean air zone – the ultra-low emission zone (Ulez) – more than seven years ago, no city had ever attempted anything quite like it. At the time, the…