OPINION - The Standard View: The evidence is in — Sadiq Khan's Ulez extension is cutting toxic air

Critics warned that Sadiq Khan’s mission to clean up London’s air would be politically toxic and practically ineffectual. They were wrong on both counts. A long-awaited report by City Hall demonstrates that the Mayor’s expansion of the ultra low emission zone (Ulez) resulted in a “better than expected” reduction in harmful exhaust emissions from cars and vans.