The Met Office has issued a yellow weather warning for fog across London and the South East, with visibility expected to fall below 50 metres on Sunday morning.
The dense fog threatens to disrupt travel for Londoners heading to Remembrance Sunday services, with potential delays on roads, buses, and rail networks. Transport bosses have warned that the heavy mist could also ground flights at London airports and stall Thames ferries.
Warning in force until 10:00am
The alert remains in force until 10:00am, affecting early-morning commuters and those travelling to the Cenotaph and local war memorials. Drivers are being urged to check their routes, ensure fog lights are working, and allow extra time for journeys.
Because weather conditions and travel advisories can change rapidly, travellers are advised to check real-time updates directly with the Met Office and TfL before setting off.
Potential Arctic blast
The foggy conditions come amid growing concerns that a weakening polar vortex could bring a late-November freeze to London. Meteorologists are tracking a sudden warming in the stratosphere that threatens to weaken the ring of winds keeping freezing air trapped at the North Pole.
Met Office forecaster Marco Petagna said: "At the moment, we've got a warming taking place in the stratosphere. The polar vortex in the stratosphere is starting to weaken."
Experts will monitor the system over the coming weeks to determine whether the capital should brace for a prolonged winter freeze. Official updates from the Met Office will provide ongoing monitoring and weather outlooks.
