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It will be worth taking a snapshot of a Sunday via https://www.londonair.org.uk/LondonAir/nowcast.aspx and comparing to the no car day.

It's a shame a week day was not selected, but it would be a bigger shame to have this be a once a year promotional day rather than part of a learning exercise towards reduced pollution in London.

Another link of note would be https://cleanair.london/ which brings together many of the resources that document the current air quality and either proposes or tracks the policies that may address it.

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