The Met Office has issued a yellow weather warning for London, with dense fog expected to affect the capital over a 17-hour period. The advisory warns of potentially hazardous conditions, which could lead to travel disruption and slower journeys across the city.
The warning comes into effect at 6pm on Sunday, November 8, and remains in place until 11am on Monday, November 9. Motorists and commuters are advised to exercise caution, allow extra time for their journeys and stay informed about the latest weather and travel updates.
Londoners have been warned to expect slower journey times with delays to bus and train services, while there is also the possibility of flights being cancelled.
The Met Office said fog patches will begin to appear this evening and overnight, becoming extensive by Monday morning.
Some dense patches of fog will see visibility down to 50 metres or less before it slowly thins further into the morning. Britain is bracing for cooler temperatures this month due to a weakening polar vortex which could push down Arctic air, forecasters warn.
A polar vortex is a ring of powerful winds that keep freezing air near the North Pole, but if it weakens, this air could sweep south and bring wintry weather to Britain.
This comes after an odd October which was wetter, warmer and sunnier than average across the UK.
Met Office Scientist Dr Emily Carlisle said: “October saw a notable shift towards more unsettled weather, with low-pressure systems bringing repeated spells of rain through the month.
“Rainfall was particularly concentrated towards the end of October as Storm Austen and Storm Boelo affected the UK in quick succession.“
This resulted in above-average rainfall for the UK and all four nations. Storm Boelo was especially notable, with 24 October provisionally the joint-sixth wettest day on record for the UK and the sixth wettest for Scotland.
“October marks the ninth consecutive month with above-average mean temperatures for the UK, continuing the prolonged spell of warmer-than-average conditions seen through much of 2026.”
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