Heavy fog triggers UK travel warning as commuters face delays

Thick fog across large parts of the UK has triggered a yellow weather warning and prompted fresh travel alerts, as forecasters caution that reduced visibility could mean slower journeys, disruption to public transport and delays around major airports on Monday morning.

Yellow fog warning in force from Sunday evening into Monday

Publicly available information from the Met Office shows a yellow weather warning for fog came into force across parts of England, Wales and Northern Ireland from 18:00 on Sunday 8 November 2026, running into the late morning of Monday 9 November. The alert covers a broad corridor stretching from around York to Bath, taking in much of southeast and eastern England, alongside separate zones in Wales and Northern Ireland.

Warning summaries state that fog is expected to be dense in places, with visibility dropping below 100 metres and in some locations closer to 50 metres. The Met Office notes that these conditions can lead to slower journey times on the roads, potential delays to bus and train services, and a risk of flight delays or cancellations at affected airports.

Accessible guidance linked to the warning advises road users to check conditions before setting out, leave additional time for their journeys and be prepared to change plans if conditions deteriorate. Travellers are also encouraged to stay up to date with forecast changes through the day, as yellow alerts can be updated, extended or cancelled as visibility improves.

Weather briefings over the weekend highlighted a combination of light winds, clear skies and long November nights as creating what forecasters described as the “perfect recipe” for widespread fog formation. With ground temperatures falling quickly after sunset, moisture in the air has condensed close to the surface, allowing thick patches of fog to develop and linger into the Monday morning peak.

Road collisions and queues reported near Heathrow corridor

Reports from national travel coverage early on Monday indicate that the fog has already contributed to disruption on key motorway routes. Coverage from outlets monitoring live traffic described queues and standstill conditions overnight on a busy stretch of motorway in west London after a collision involving two cars in thick fog close to the approaches for Heathrow Airport.

National Highways travel updates cited in those reports described poor visibility and very slow traffic in the area late on Sunday night into the early hours of Monday, with congestion building as lanes were blocked to allow incident response and vehicle recovery. Drivers heading towards junctions serving Heathrow were advised to expect heavy delays, with knock-on effects for passengers trying to reach early flights from the airport.

Further north, regional pages of the Met Office warning service highlight that West Yorkshire and neighbouring areas are also under a fog warning on Monday morning, with forecasters again flagging the potential for slower road journeys and localised delays to bus and rail services. Motorists on exposed stretches of motorway and dual carriageway across the warning area have been urged through public travel bulletins to reduce speed, increase stopping distances and use fog lights only when visibility drops below the legal threshold.

Although comprehensive national collision figures for the morning peak will not be available until later, early indications from local traffic bulletins suggest a higher number of minor shunts and breakdowns on routes inside the warning zone, particularly where dense fog has pooled in valleys and low-lying sections of road.

Air, rail and bus operators flag possible timetable disruption

With visibility at some airfields expected to fall well below normal operating minima at times, aviation-focused coverage warns that Monday’s schedule may be subject to short-notice changes. The Met Office warning language notes a chance of delays or cancellations to flights, and media reports cite major airports in the southeast, including Heathrow, as being at particular risk of disruption while the fog persists.

Travel updates circulated overnight by outlets tracking social media activity indicate that Heathrow has urged passengers to allow extra time to reach terminals and to check the status of their flights before leaving home. Fog can affect both arrivals and departures, as low visibility may restrict the rate at which aircraft can land and take off, and can also complicate ground movements on taxiways.

Rail and bus operators whose routes cross the warning area are also expected to be affected, although usually to a lesser degree than road and air travel. According to information shared through operator websites and regional news, slower traffic on adjacent motorways and trunk roads can delay intercity coach services, while local buses may experience timetable slippage where drivers reduce speed for safety in thick fog.

For rail passengers, the main impact tends to come where fog combines with other weather factors such as low temperatures or residual damp on the tracks. So far, national rail information platforms on Monday morning are primarily highlighting minor delays associated with cautious driving of road vehicles at level crossings and slower movements around station approaches.

Drivers urged to adjust speed, spacing and lighting

Safety advisories referenced in the Met Office warning and driving guidance from national motoring and training organisations emphasise a small number of practical steps for anyone who must travel in the affected areas. Central to the advice is to slow down, maintain a greater distance from the vehicle in front and be prepared for sudden changes in visibility as drivers move between clearer stretches and dense patches of fog.

Guidance reiterates that fog lights should be used when visibility falls below around 100 metres and switched off once conditions improve, to avoid dazzling other road users. Driver training materials published earlier this year also stress the importance of avoiding full beam headlights in fog, since the light can reflect back off water droplets and make it even harder to see the road ahead.

Travel safety documents consulted for this report recommend that motorists check their vehicle lights before setting out, ensure windscreens and mirrors are clear inside and out, and keep heater and demister settings adjusted so that glass does not fog up further while driving. Drivers are also encouraged to plan routes that avoid poorly lit rural lanes and to consider delaying or rerouting non-essential journeys until the warning period has expired.

For those heading to work or to the airport early on Monday, road safety leaflets routinely advise packing a basic emergency kit during adverse weather spells. Items often suggested include warm clothing, water, a fully charged mobile phone and a small torch, particularly for longer journeys on motorways, in case congestion or incidents lead to unexpected time stationary in traffic.

What the warning means for commuters and travellers today

For many commuters, the most immediate impact of the fog warning on Monday is likely to be extended journey times. With forecasters expecting conditions to improve gradually by late morning, those travelling very early face the highest likelihood of encountering thick fog on untreated or poorly lit routes, especially away from larger towns and cities.

Urban areas inside the warning zone may experience a slower but still manageable rush hour, with busier routes benefiting from street lighting and heavier traffic that can help to disperse fog near the ground. However, reports from several regions on Monday morning highlight that visibility can deteriorate rapidly on higher stretches of ring roads and bypasses, even only a short distance from better-lit city centres.

For intercity and international travellers, the combination of slowed road traffic and the possibility of airside restrictions means that extra margin in travel plans is strongly advised. Publicly available guidance from both the Met Office and major transport operators suggests checking journey planners before departure, allowing a wider window to reach departure points and preparing for potential last-minute adjustments to timetables while the yellow warning remains active.

Forecasters indicate that, as temperatures lift and light winds increase later in the day, fog should gradually thin and lift into low cloud for most areas under the warning. Until then, the advice across official guidance and travel coverage is consistent: treat conditions with caution, adapt driving to what can be seen ahead and factor in additional time to reach destinations safely.