The Mayor is responsible for air quality in the capital and has reserve powers under Part IV of the 1995 Environment Act to enable this. Under the Act, the Mayor may direct the boroughs in the Greater London area concerning how they should assess and prioritise action in their areas. From September 2020 an Ultra-Low Emission Zone (ULEZ) will be introduced in London. The ULEZ will apply to all cars, motorcycles, vans, minibuses, buses, coaches and HGVs and will cover the same area as the current Congestion Charge Zone.
The Government is firmly committed to improving the UK’s air quality and cutting harmful emissions. That is why we have committed more than £2 billion since 2011 to reduce transport emissions and the autumn statement provided a further £290 million to support greener transport. Air quality is improving, but the Government recognises that we need to go further and faster and we will be consulting on a new national plan by 24 April. The final plan will be in place by the end of July.