London T-Charge revives policy patchwork debate

The introduction of London's T-charge has kicked off a flurry of debate regarding emissions policies and air quality approaches. Sadiq Khan, the Mayor of London, has described it as a milestone to encourage cleaner motoring and boasted that "London now has the world's toughest emissions standards." At the same time, it has revived concerns about a patchwork of mismatched policies at a time when other regions are looking to the UK to set an example.