Number 10 has been blocked from overruling the expansion of London’s ultra-low emission zone after government lawyers warned its bid would be rejected by the courts.
Cabinet ministers were considering using a little-known legal power that allows them to reject a London mayor’s transport strategy if it is “inconsistent with national policies”.
The extension to the ULEZ charge zone, which will charge the worst-polluting vehicles £12.50 a day to enter Greater London, will come into force on 29 August.
