Yes, with fewer aircraft and fewer cars around, the sky conditions may improve.
With regards air “quality”, I’ve been watching the UK Air Information Resource and not seen any particular downward trends yet. The data below is for the last 7 days for Canterbury, but back data for several years from numerous sites around the country exist:
https://uk-air.defra.gov.uk/data-plot?site_id=CANT&days=7
James
