What is London’s controversial Ulez expansion? – BBC News

The expansion of the Ultra Low Emission Zone (Ulez) across London can go ahead after the UK’s High Court ruled it lawful.

The plans had been challenged by opponents to the Mayor of London’s bid to charge older, more polluting vehicles a fee to drive through the zone.

The BBC’s Ros Atkins takes a look at the controversial expansion which will see the zone cover the vast majority of Greater London.

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