Susan Hall says she would ‘scrap ULEZ expansion on day one’. But how? As London Mayor, the Conservative would have powers to end Sadiq Khan's air quality measure, though using them might not be straightforward in all respects
Theo Blackwell: Twenty years after congestion charging began let’s recognise Transport for London as a tech innovator
Claire Harding: Twenty years since London’s congestion charge began, road-user charging is still the future