To ask Her Majesty’s Government whether all government departments assess the impact on air quality when drawing up directly or indirectly related policies or legislation since the Supreme Court judgment on 29 April in R (on the application of ClientEarth) v Secretary of State for the Environment, Food and Rural Affairs  UKSC 28 and  UKSC 25.
HM Treasury’s Green Book guidance provides the framework for economic appraisal and evaluation of all Central Government policies, programmes and projects. In line with its advice, departments should reflect air quality impacts in decision-making wherever possible. Specific guidance is provided for government departments to use in valuing the impacts of air quality. This guidance has been available since 2013.
The Government is currently consulting on draft air quality plans. Alongside the air quality plans interim appraisal guidance has been published to reflect the latest health evidence related to Nitrogen Dioxide. This guidance supplements the Green Book guidance.
Both sets of guidance are available on the gov.uk website. Copies are attached.