The UK continues to meet all current international air quality limits except for NO2. In July 2017 we published the NO2 Plan, backed by £3.5 billion funding, which sets out the steps we are taking to comply with NO2 limits as soon as possible. We are working intensively with local authorities, to identify measures to swiftly bring forward compliance, and support them with guidance and funding. This includes major cities outside London which are exceeding NO2 limits.
The Mayor of London has devolved responsibility for air quality in London and has received substantial grants through the TFL grant and other grants to support improvements to modes of transport to improve air quality.