Five affected Conservative-led local authorities argued the decision to expand ULEZ was unlawful, but their legal challenge was rejected on Friday. "This landmark decision is good news as it means we can proceed with cleaning up the air in outer London," Khan said in a statement following the ruling. Britain's green agenda has been in focus over the past week after the governing Conservative Party won an election in former Prime Minister Boris Johnson's old seat just outside central London, in part by attacking the ULEZ expansion. Judge Jonathan Swift rejected all three grounds of challenge to the expansion of ULEZ, including that the public consultation on the proposed expansion was unlawful. ($1 = 0.7809 pounds)Reporting by Sam Tobin, Editing by Kylie MacLellan and Tomasz JanowskiOur Standards: The Thomson Reuters Trust Principles.

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Persons: Sadiq Khan, Khan, Boris Johnson's, Keir Starmer, Conservative – Johnson, Jonathan Swift, Sam Tobin, Kylie MacLellan, Tomasz Janowski Organizations: London's Labour, Conservative, Transport, Conservative Party, Labour Party's, London, Thomson Locations: British, Greater London, leafier, London