And - just to help with the "practicalities" - Caroline Russell points out that existing UK regulations prohibit ads that "encourage behaviour that is grossly prejudicial to the protection of the environment." 5/7

But, as Caroline Russell highlights, other cities in Europe are already leading the way without national legislation.

Earlier this year, Gothenburg passed a fossil fuel ad ban that includes ICE cars, airlines, fossil fuel companies, and other fossil fuel products. 👏 4/7

After making this confusing defence of polluter ads on London public transport, the Mayor then reveals that they only make up between 0.01-0.02% of ad revenue. 🥲

"It isn't an issue of finances. It's an issue of practicalities." 3/7

In response, the Mayor first highlighted that ad revenue - even from polluting industries - funds "clean and sustainable alternatives to car use". 🤔

Translation: it's okay to promote companies that are encouraging the public to not use London's sustainable transport options. 🙃 2/7

🚨 Campaign win! 🚨

Mayor Sadiq Khan pledges to review Transport for London's ad policy on polluter ads. 🎉

Here is the brilliant Caroline Russell's question for the Mayor along with his commitment.

Scroll on for other key moments from Mayor's Question Time. 🧵 1/7

@carolinerussell.bsky.social

But, as Caroline Russell highlights, other cities in Europe are already leading the way without national legislation.

Earlier this year, Gothenburg passed a fossil fuel ad ban that includes ICE cars, airlines, fossil fuel companies, and other fossil fuel products. 👏 4/6

After making this confusing defence of polluter ads on London public transport, the Mayor then reveals that they only make up between 0.01-0.02% of ad revenue. 🥲

"It isn't an issue of finances. It's an issue of practicalities." 3/6

In response, the Mayor first highlighted that ad revenue - even from polluting industries - funds "clean and sustainable alternatives to car use". 🤔

Translation: it's okay to promote companies that are encouraging the public to not use London's sustainable transport options. 🙃 2/6

🌍 We took over Southwark station last week, urging city leaders to lead on climate as the C40 World Mayors’ Summit got underway.

We now need to keep up the pressure.

✍️ Write to Mayor Sadiq Khan to stop promoting pollution on London public transport: actionnetwork.org/letters/ba2d...

💨 In 2025, a report from the Royal College of Physicians found that air pollution contributed to 30,000 deaths in the UK in 2025 and cost the UK upwards of £27 billion annually – and may be as much as £50 billion when wider impacts, such as dementia, are accounted for.

🌍 What do global cities such as Amsterdam, Stockholm and Edinburgh all have in common?

These major cities have ALL banned fossil fuel adverts. These ads have massive climate and health impacts, all while targeting politically influential decision makers.

BREAKING! 🚨

📢 We’ve taken over the ad space at Southwark tube station, calling on the Mayor of London, Sadiq Khan, to end adverts that promote pollution. 🧵 1/8

✍️ Use our template to write to the Mayor: actionnetwork.org/letters/time...