The Air Quality Expert Group (AQEG), supported by the Department for Environment, Food and Rural Affairs (Defra), issued a call for evidence on 7 April 2020 on the effects of the coronavirus (COVID-19) outbreak on air quality in the UK. (Further information on this call can be found here: https://uk-air.defra.gov.uk/news?view=259)
In response, Ricardo’s air quality experts have been investigating the changes in air pollution emissions and concentrations since the introduction of COVID-19 lockdown measures. This paper reports on the initial findings of this investigation. It highlights key changes in emissions across different sectors of socioeconomic activity and quantifies changes in oxides of nitrogen (NOx) at various sites across the UK.