Simon Birkett, Clean Air in London

@cleanairlondon

Simon Birkett, as Founder and Director of Clean Air in London, has championed compliance with WHO air quality guidelines throughout London and elsewhere to protect public health and fight climate change since 2006. @CleanAirLondon #AirQuality #AirPollution

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Simon Birkett, Clean Air in London@cleanairlondon· 10h

Update Wed 12 August 2026 | Widespread 🟡YELLOW and 🟠AMBER AIR POLLUTION HEALTH ALERT across much of southern UK on Wed-Thurs. 🔴RED (8-hr ave over 161ug/m3) or 🟣EXTREME (1hr over 180ug/m3) ozone possible in places on Thurs. Some relief expected from Friday

Simon Birkett, Clean Air in London@cleanairlondon· 1d

Update Tues 11 August 2026 | Widespread 🟠AMBER AIR POLLUTION HEALTH ALERT across much of southern UK by Thurs. Why won't Defra, @metoffice.gov.uk @ukhsa.bsky.social and others share these as vigorously as those for heat? 🔴RED (8-hr over 161ug/m3) or 🟣EXTREME (1hr > 180ug/m3) ozone possible in places

Simon Birkett, Clean Air in London@cleanairlondon· 8d

Why Defra, @ukhsa.bsky.social @metoffice.gov.uk are you not actively sharing 🟠AMBER AIR POLLUTION HEALTH ALERTS as you do for heat etc? 1-hr ozone exceeded 150ug/m3 at several sites today and 168 ug/m3 in Leamington Spa cc @mayoroflondon.bsky.social

Simon Birkett, Clean Air in London@cleanairlondon· 9d

Update Mon 3 August 2026 | Official: Widespread AMBER AIR POLLUTION HEALTH ALERT for London and southern UK on Monday. Lingers Tuesday. Possible RED in one or two places but unlikely during such a short peak. Relief from Wednesday

Simon Birkett, Clean Air in London@cleanairlondon· 12d

Update Fri 31 July 2026 - One month ends. Another is about to begin. YELLOW and AMBER AIR POLLUTION HEALTH ALERT for southern UK Sun 2 to Tues 4 August or beyond

Simon Birkett, Clean Air in London@cleanairlondon· 13d

Update Thurs 30 July 2026 | Official: YELLOW and AMBER AIR POLLUTION HEALTH ALERT for southern England and Wales on Sun and Mon

Simon Birkett, Clean Air in London@cleanairlondon· 14d

Update Wed 29 July 2026 | Official: YELLOW AIR POLLUTION HEALTH ALERT for London on Wed, Sat and Sun. It never ends. Where are the public warnings?

Simon Birkett, Clean Air in London@cleanairlondon· 15d

Update Tue 28 July 2026 | First explicit reference to VERY HIGH AIR POLLUTION in new @metoffice.gov.uk WILDFIRE forecasts - Cairngorms. Meanwhile, YELLOW AIR POLLUTION HEALTH ALERT for London and south east England from Wed-Sat

Simon Birkett, Clean Air in London@cleanairlondon· 16d

Update Mon 27 July 2026 | EXTREME AIR POLLUTION ALERT for north east Scotland on Mon and Tues. Is @metoffice.gov.uk finally forecasting smoke from wildfires? And YELLOW AIR POLLUTION HEALTH ALERT for south east England on Wed. Brief episode there. What official warnings will be shared by officials?

Simon Birkett, Clean Air in London@cleanairlondon· 17d

Update Sun 26 July 2026 | Official: YELLOW AIR POLLUTION HEALTH ALERT for parts of England and Wales on Wed 29 July lingering Thurs

Simon Birkett, Clean Air in London@cleanairlondon· 18d

Update Sat 25 July 2026 | Official: Widespread YELLOW AIR POLLUTION HEALTH ALERT for south east England for Wed 29 July (and likely beyond)

Simon Birkett, Clean Air in London@cleanairlondon· 19d

YELLLOW AIR POLLUTION HEALTH ALERT for London on Fri 24 July 2026. Ozone and high particle levels in places. Winds becoming more westerly into the weekend with cleaner air from the Atlantic. Next YELLOW/AMBER episode likely from Tuesday

Simon Birkett, Clean Air in London@cleanairlondon· 19d

Official: YELLOW AIR POLLUTION HEALTH ALERT for London and southern England on Thurs and Fri 23-24 July 2026

Simon Birkett, Clean Air in London@cleanairlondon· 21d

🟠AMBER and 🟡YELLOW #AirPollution HEALTH ALERT for London and southern England on Wed, Thurs and Fri (22-24 July 2026). New episode(s) underway

Simon Birkett, Clean Air in London@cleanairlondon· 24d

20/n Sun 19 July 2026 | Cleaner air except parts of south west England. YELLOW AIR POLLUTION HEALTH ALERT for parts of London, Southampton and/or Bristol on Mon/Tues. Then some relief again? THANK YOU FOR FOLLOWING AND SHARING @cleanairlondon.bsky.social POSTS DURING THIS LONG EPISODE 🙏. END🧵

Simon Birkett, Clean Air in London@cleanairlondon· 24d

45/n Sat 18 July 2026 | YELLOW AIR POLLUTION HEALTH ALERT across south west England and Wales today. Then relief for most

Simon Birkett, Clean Air in London@cleanairlondon· 26d

42/n. Fri 17 July 2026 | Widespread YELLOW AIR POLLUTION HEALTH ALERT today. Fortunately, it’s the likely last day of this major episode (with the Athletics on Sat). One of @andyburnham.bsky.social “King of the North’s” #KingOTNorth’s first jobs should be to tackle WILDFIRES e.g. near MANCHESTER…

Simon Birkett, Clean Air in London@cleanairlondon· 28d

Wed 15 July 2026 | YELLOW #AirPollution HEALTH ALERT ongoing for ozone in southern UK. Northeasterly breeze and patchy cloud reducing impact at times. Defra has admitted that their forecasts don’t include #Wildfire #Smoke and warned @andyburnham.bsky.social about #Manchester

Simon Birkett, Clean Air in London@cleanairlondon· 29d

Tues 14 July 2026 | Widespread YELLOW AIR POLLUTION HEALTH ALERT for ozone in southern UK from today. Northeasterly breeze and patchy cloud reducing impact. We maintain our precautionary AMBER AIR POLLUTION HEALTH ALERT for these areas. Hopefully @britishathletics.bsky.social won’t be affected

Simon Birkett, Clean Air in London@cleanairlondon· Jul 10

OFFICIAL | RED AIR POLLUTION HEALTH ALERT for West Midlands after TELFORD HOLLINSWOOD hit 8-hr ave ozone of 163 ug/m3 on Fri 10 July 2026 ps and narrowly exceeded 180 ug/m3 1-hr EXTREME AIR POLLUTION ALERT threshold. More alerts possible but easterly breeze and some cloud helping

Simon Birkett, Clean Air in London@cleanairlondon· Jul 10

#BirminghamLadywood's ozone (not other) sensor, which triggered a 24-hr national #PollutionAlert for EXTREME AIR POLLUTION last night, has been offline since 8am this morning (10/7/26) < Makes me remember monitor on #OlympicRouteNetwork getting 'flooded' and blow the electrics for half a building...

Simon Birkett, Clean Air in London@cleanairlondon· Jul 10

We are calling on @commonseac.parliament.uk to urgently investigate the apparent failure by DEFRA, DHSC, @ukhsa.bsky.social @metoffice.gov.uk and others to actively warn people about this catastophic AMBER, RED and EXTREME ozone #AirPollution episode uk-air.defra.gov.uk/latest/perio...

Simon Birkett, Clean Air in London@cleanairlondon· Jul 10

NB Defra's 'Information bulletin' (ie barely complied with Air Quality Standards Regulations 2010 (and not a press release as @sadiqkhanlondon.bsky.social and French issue) last night failed even to mention COVENTRY

Simon Birkett, Clean Air in London@cleanairlondon· Jul 9

OFFICIAL | RED AIR POLLUTION HEALTH ALERT and 24-hr EXTREME AIR POLLUTION ALERT for BIRMINGHAM and COVENTRY from 8pm Thurs 9 July 2026 after 8-hr and 1-hr ozone warning thresholds breached. Ozone is the most-irritant gas for humans

Simon Birkett, Clean Air in London@cleanairlondon· Jul 9

BREAKING | RED AIR HEALTH ALERT and 24-hr EXTREME AIR POLLUTION ALERT for BIRMINGHAM 8pm Thurs 9 July 2026 after 8-hr and 1-hr ozone breached HIGH health and legal alert levels. Risk to life. Others may follow << Not even an 'Information Bulletin' from Defra

Simon Birkett, Clean Air in London@cleanairlondon· Jul 8

OFFICIAL (Wed 8 July 2026) | AMBER AIR HEALTH ALERT for south-eastern UK from today. Slightly lower temperatures than June, westerly wind today, cloud Thurs and breeze Fri may save us from the very worst. RED still possible

Simon Birkett, Clean Air in London@cleanairlondon· Jul 7

OFFICIAL (Tues 7 July 2026) | Widespread AMBER AIR HEALTH ALERT for southern UK from Wed 8 July. Meanwhile, @cleanairlondon.bsky.social confirms its forecast of RED AIR HEALTH ALERT (8-hr ozone over 161 ug/m3) and/or EXTREME AIR ALERT (1-hr ozone over 180 ug/m3) by Friday

Simon Birkett, Clean Air in London@cleanairlondon· Jul 6

Bold new vision for #CleanAir from @sadiqkhanlondon.bsky.social @mayoroflondon.bsky.social on day after 70th ANNIVERSARY of #CleanAirAct and revealing up to 5,100 early deaths from #AirPollution in 2024 | Tackle inequalities, beat EU limits and comply with @who.int #AirQuality Guidelines by 2030

Simon Birkett, Clean Air in London@cleanairlondon· Jul 5

Celebrating 70th anniversary of the #CleanAirAct today (5 July 2026)! We need to enshrine #HumanRight to clean air in UK law, match EU #AirQuality laws, warn people during episodes, #BanVisibleSmoke and phase out #WoodBurningStoves as @thecccuk.bsky.social advises cleanair.london/policy/great...

Simon Birkett, Clean Air in London@cleanairlondon· Jul 1

Government reports SHARPLY WORSE UK #AirPollution in 2025 on eve of @barrygardiner.bsky.social's debate in @ukparliament.parliament.uk about Government plans to TACKLE AIR POLLUTION (3pm Thurs 2 July 2026). Defra blames RESIDENTIAL BURNING on 70th anniversary of #CleanAirAct (Sun 5 July 2026)!