High air pollution alert issued as fog threatens travel disruption

Summary
Dense fog has led to a "high" air pollution alert being issued in London - as forecasters warn of difficult travel conditions and transport delays across much of the UK.
Description from Sky News.
Who is covering this
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Dangerous air pollution alert is issued for London TODAY after bonfires and fireworks added to dense fog to cause smog build-up
Mayor of London Sadiq Khan placed the capital under an alert for high air pollution last night, urging 'those most vulnerable' to be wary.
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High air pollution alert issued as fog threatens travel disruption
Dense fog has led to a "high" air pollution alert being issued in London - as forecasters warn of difficult travel conditions and transport delays across much of the UK.

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