Tories pledge to reverse Ulez expansion and limit 20mph roads in Wales

Party would immediately introduce a drivers bill if it wins the election, in a significant back-pedal on devolution

The Conservatives have promised to introduce a law that would unilaterally reverse the expansion of London's clean air zone and limit the use of 20mph routes in Wales, overturning the choices of voters in both places.

In a pledge that, if implemented, would mark a significant reversal of devolution, the Tories said they would immediately introduce a backing drivers bill, which would use Westminster powers to quash local say over parts of transport policy.