Thick fog blankets much of England and Wales as Met Office warns of hazardous Sunday morning travel
Millions of people across England and Wales woke on Sunday, 1 November 2026, to thick fog that turned ordinary journeys into slow, careful crawls. The Met Office, Britain’s national weather service, had warned late the night before that visibility could fall below 100 metres in places, and urged drivers to allow extra time and check their fog lights.
The warning covered 74 areas, from Yorkshire in the north to the south west, and from London and the home counties across to Wales. It was the latest in a run of foggy mornings building all week, as high pressure settled over the country and skies cleared overnight. Fog is a familiar part of autumn in Britain, and this was only a yellow warning — the Met Office’s lowest level of alert — but with dense fog and many people travelling, it was a morning to take seriously.
At a glance
What happened: The Met Office issued a yellow fog warning covering 74 areas across England and Wales, in force from midnight until 10am on Sunday, 1 November 2026, with visibility below 100 metres in the densest patches.
Why it matters: Dense fog makes driving hazardous and can delay buses, trains, flights and ferries, so journeys across much of the country were expected to take longer than usual.
What happens next: The fog was expected to clear during Sunday morning, but forecasters warned similar fog could return on later nights into early November.
The warning in detail
The Met Office announced the warning at 11.19pm on Saturday, 31 October, about 40 minutes before it came into force at midnight. It ran until 10am on Sunday, 1 November, covering the darkest part of the night and the early morning, when fog is usually thickest.
It applied to parts of eight regions: the East Midlands, the East of England, London and the South East, the North West, the South West, Wales, the West Midlands, and Yorkshire and the Humber. In its forecast, the Met Office said: “Fog has developed widely and will persist across many areas into Sunday morning before slowly lifting and clearing. Visibility will vary from place to place with some dense fog patches bringing visibility of less than 100 metres making for difficult travel conditions.”
One hundred metres is roughly the length of a football pitch. At motorway speeds, a driver covers that distance in only a few seconds, leaving very little time to react to a queue of traffic or a hazard ahead — which is why fog warnings focus so heavily on driving.
The Met Office also warned of delays to bus and train services, and of a chance of delays or cancellations to flights. Its advice was practical: “Give yourself the best chance of avoiding delays by checking road conditions if driving, leaving extra journey time, or amending plans if necessary. Make sure you know how to switch on your fog lights, and check they are working before setting off on your journey. Bus and train services, as well as flights and ferry travel may also be affected; check for updates from your travel company and follow their advice.”
The warning covered cities such as London, Birmingham, Bristol, Nottingham, Leicester and York, along with dozens of counties and towns across the Midlands, the east and south of England, south Wales and Yorkshire. The fog was expected to clear by 10am, though the improvement would not be instant or even, and some places would stay foggy for longer.
A week of foggy mornings
Sunday’s warning did not come out of nowhere. Fog had been creeping back into British mornings for several days, and forecasters had warned since midweek that more was on the way.
Most people in southern and central England had enjoyed mild weather and clear skies earlier in the week. But from Thursday night onwards, mist and fog began to appear during the mornings, and some patches did not clear until the afternoon. On Friday, 30 October, the Met Office issued a yellow warning for fog affecting Lincolnshire, the East Midlands, the home counties and parts of Greater London, again with visibility below 100 metres in places. Forecasters said delays could continue into the afternoon, and that in some rural spots in eastern England the fog might not clear until then.
Met Office meteorologist Honor Criswick said on 30 October: “The foggy picture is set to continue as we creep our way closer towards Halloween.” She added that eastern Wales, Lincolnshire and north-east England could see fog on Friday, with more widespread fog across eastern England later in the evening, and a “chilly, gloomy” start to Saturday.
Halloween fell on Saturday, 31 October, and the fog arrived just as families were heading out for evening events and travelling home again. By Saturday night, the fog had developed widely enough for the Met Office to widen the warning to 74 areas for Sunday morning, far more than the 36 areas covered by an earlier warning in the week. The foggy spell followed a period of very changeable weather that had included strong winds and heavy rain linked to Storm Boelo.
Why the fog formed
Fog is simply a cloud at ground level. It forms when the air cools until the water vapour in it condenses into tiny droplets, which hang in the air and scatter light. When those droplets are thick enough, you cannot see far through them.
The fog of late October and early November 2026 was what forecasters call radiation fog. It forms overnight under clear skies, when the ground loses heat quickly and cools the air just above it. High pressure and light winds favour it, because still air lets the cold layer build up instead of being mixed away. That was exactly the pattern over England and Wales: settled high pressure, clear skies, and barely a breeze.
Radiation fog usually forms after midnight, thickens towards dawn, and lifts as the sun warms the ground. That is why the warning ran from midnight to 10am, and why the worst conditions were expected in the early hours. In low-lying rural areas, especially in the east, fog can linger longer, because cold, damp air pools in valleys and hollows.
Fog is most common in Britain from October until March, when the nights are long enough for the ground to cool sharply and the air is often damp. In particularly dense fog, visibility can fall to just a couple of feet ahead. Even so, 100 metres is far less than the distance a car needs to stop safely at speed, which is why fog is treated as a serious driving hazard.
With high pressure in charge and clear, calm nights likely to continue, forecasters expected similar morning fog through early November, particularly in eastern areas. Travellers were advised to keep checking updates from transport operators rather than assuming one clear morning meant the foggy spell was over.
What it means for travel
Fog affects every form of travel, and the Sunday morning warning touched all of them.
On the roads, the main risk is visibility. Drivers cannot see hazards ahead, and cannot always judge how fast other vehicles are moving. Queues can appear suddenly out of the murk, and a vehicle without its lights on can be almost invisible. The Met Office advised drivers to check road conditions, leave extra time, and be ready to change plans.
On buses and trains, the problem is usually delay rather than danger: operators slow down when they cannot see signals, crossings and platforms clearly, and timetables slip. The Met Office warned of delays on Sunday morning, and earlier that week it said delays could continue into the afternoon even after the fog had begun to lift.
At airports, fog can delay or cancel flights, because aircraft need a minimum visibility to take off and land safely. The warning mentioned a chance of delays or cancellations to flights, and ferry travel could also be affected. Passengers were asked to check with their travel company before travelling.
The disruption is not evenly spread. Motorways and main roads through low-lying areas, river valleys and the flat counties of eastern England tend to suffer most, because that is where fog forms thickest and lingers longest. Higher ground and coastal areas with a breeze often escape the worst of it — so one town can be clear while the next, only a few miles away, is wrapped in fog.
How to drive safely in fog
The motoring organisation the AA has shared advice for driving in fog, and its tips are simple and practical, and worth knowing before you need them.
First, use dipped headlights, along with your wipers and demisters, so that you can see and be seen. Switch your fog lights on when visibility is poor, but off again when it improves, because fog lights left on in clear conditions can dazzle other drivers. Watch out for other drivers who may not have the right lights on.
Second, slow down and give yourself more room. Adjust your speed to the conditions, and allow more time to stop. The AA advises leaving a gap of three seconds instead of the usual two between you and the vehicle in front. In very thick fog, it may be safer to pull over somewhere safe and wait rather than pressing on.
Third, use your other senses as well as your eyes. At junctions where visibility is poor, the AA suggests opening your window and listening for traffic before pulling out. And never use your main-beam headlights in fog: the light reflects off the droplets and back into your eyes, making it harder to see, not easier. The Met Office adds: know how to switch on your fog lights and check they work before you set off.
What a yellow warning means
The Met Office’s National Severe Weather Warning Service uses three levels: yellow, amber and red. Yellow is the lowest. It means the weather could cause some low-level disruption, that journeys may take longer than usual, and that people should be aware and plan accordingly. It does not mean staying at home, but some travel disruption is possible in the warning area.
Amber warnings mean a greater risk of disruption, with a higher chance of travel delays, road and rail closures, and damage to buildings and infrastructure. Red warnings are the most serious: dangerous weather is expected, with a risk to life.
Sunday’s fog warning was yellow, which matched the hazard: disruptive and potentially dangerous on the roads, but not the kind of event that shuts down a country. Even so, yellow warnings deserve attention, because fog causes many accidents on British roads.
What happens next
The immediate outlook was for improvement during Sunday morning. The Met Office expected the fog to thin, lift and clear as the sun rose and warmed the ground. By late morning, much of the country was expected to be dry and settled, with some rain forecast only in northern and western parts of the British Isles.
But the foggy pattern was not expected to disappear altogether. Forecasters warned of night-time fog in parts of eastern and southern England, and that conditions could return early the following week. For anyone travelling after 1 November, the advice stayed the same: check the forecast and the Met Office warnings before setting out, allow extra time, and make sure your fog lights work.
Frequently asked questions
What is a yellow weather warning?
A yellow warning is the lowest level of the Met Office’s National Severe Weather Warning Service. It means the weather could cause some low-level disruption, such as longer journeys and delays to public transport. Amber and red warnings indicate a greater risk of disruption and danger.
How bad was the visibility in the fog?
The Met Office said visibility could fall below 100 metres in the densest patches — roughly the length of a football pitch, and far less than the distance a car needs to stop safely at motorway speeds. In particularly dense fog, visibility can fall to just a couple of feet.
Which areas were covered by the warning?
The warning covered 74 areas across eight regions: the East Midlands, the East of England, London and the South East, the North West, the South West, Wales, the West Midlands, and Yorkshire and the Humber.
When was the warning in force?
The warning was announced at 11.19pm on Saturday, 31 October 2026, and was in force from midnight until 10am on Sunday, 1 November 2026. The fog was expected to clear during Sunday morning, although in some rural spots in eastern England it could linger into the afternoon.
Why does fog form on clear, calm nights?
This was radiation fog, which forms overnight under clear skies when the ground loses heat quickly and cools the air just above it. High pressure and light winds favour it, because still air lets the cold layer build up. It thickens towards dawn and lifts as the sun warms the ground.
What should I do if I have to drive in fog?
Use dipped headlights and your fog lights when visibility is poor, switching the fog lights off again when it improves. Slow down, leave a three-second gap instead of two, and use your wipers and demisters. At junctions, open your window and listen for traffic. Never use main-beam headlights in fog, and if conditions are very bad, pull over somewhere safe and wait.
Conclusion
The fog that covered much of England and Wales on the morning of Sunday, 1 November 2026 was not a rare or extreme event. It was autumn doing what autumn does in Britain: clear skies, still air and cold nights wrapping towns, fields and motorways in a thick, white blanket. But ordinary does not mean harmless: with visibility below 100 metres in places and 74 areas under a yellow warning, journeys took longer and drivers needed to slow down and switch their fog lights on.
Fog like this usually clears by late morning, and the Met Office expected Sunday’s fog to lift as the sun rose. But the same settled weather that caused it was expected to bring more foggy mornings in the days that followed. For anyone travelling in early November, the message is simple: check the forecast, allow extra time, and treat fog with respect while it lasts.
This article is for general information and education only. It is not legal or financial advice.
Sources
- https://britbrief.co.uk/weather/warnings/met-office-fog-warning-hits-74-uk-areas-with-travel-chaos.html (BritBrief, 31 October 2026)
- https://britbrief.co.uk/weather/warnings/met-office-fog-warning-motorists-urged-to-stay-alert.html (BritBrief, 30 October 2026)
- https://britbrief.co.uk/weather/warnings/map-reveals-where-thick-fog-will-hit-drivers-this-week.html (BritBrief, 30 October 2026)
- https://particle.news/story/met-office-issues-yellow-fog-warnings-for-parts-of-central-and-eastern-england (Particle News, 30 October 2026)
- https://www.thetraveler.org/met-office-fog-alert-threatens-uk-travel-in-36-areas/ (The Traveler, 31 October 2026)
