Mayor steps up opposition to Heathrow expansion as new report finds further improvement to air quality thanks to ultra-low emission zone
Sadiq Khan warns that a third runway at Heathrow would negate the environmental benefits of London's ULEZ, which has reduced NO2 and CO2 emissions. Khan opposes the expansion, claiming Heathrow is unwilling to fund necessary transport changes, a claim the airport disputes. He also stated that he opposes runway three, and that if Heathrow's plans do not address London's concerns, he will use similar methods to stop it.