Government uses national and local modelling, together with two national networks of monitoring stations, to direct its actions on air quality, with directions to local authorities issued primarily on the basis of a national model identifying areas of likely exceedance of air quality targets.19 The national network consists of around 430 unique monitoring stations across two separate networks; the UK Urban NO2 Network, established in 2020, and the older Automatic Urban and Rural Network.20 Th...

Government uses national and local modelling, together with two national networks of monitoring stations, to direct its actions on air quality, with directions to local authorities issued primarily on the basis of a national model identifying areas of likely exceedance of air quality targets.19 The national network consists of around 430 unique monitoring stations across two separate networks; the UK Urban NO2 Network, established in 2020, and the older Automatic Urban and Rural Network.20 The Joint Air Quality Unit estimates that the overall uncertainty in the national model is around +/- 30%, as it was in 2017, although it has found that th Type: conclusion | Number: 17 | Response status: not_addressed