If you’re interested in doing some gardening or growing during the lockdown, check out this post by our friends at Air Quality Brentford (AQB) on local and online suppliers: https://airqualitybrentford.wordpress.com/2020/04/08/a-little-time-to-makebrentfordgreener/
And check out these graphs posted by AQB on changes in air quality in Brentford during the coronavirus pandemic: https://airqualitybrentford.wordpress.com/2020/04/08/air-quality-during-the-coronavirus-pandemic/