Ulez just the start and similar scheme needed for buildings, experts warn

Lowering pollution produced by houses, offices and factories is just as crucial as tackling vehicle emissions

Imposing strict controls on car exhausts will only partially improve the quality of air people breathe in the UK, scientists have said. New measures to counter emissions of nitrogen oxides and other air pollutants will also be needed for buildings, heating plants and many other domestic and industrial sources in future.

The warning follows the controversy that has surrounded London's ultra low emission zone (Ulez) in which drivers are charged for their vehicles' polluting impact. This month the mayor of London, Sadiq Khan, will expand the zone from inner London so it covers all boroughs in the city. The decision has provoked opposition from some drivers and was blamed by various Labour party figures for the Conservatives surprise byelection win in Uxbridge and South Ruislip last month.