Thick fog prompts London travel warning for Sunday night

Thick fog is forecast to blanket London from Sunday evening into Monday morning, with a yellow weather warning in place and transport operators preparing for reduced visibility across key routes.

Yellow fog warning covers London and large parts of England

Publicly available information from the Met Office shows that a yellow weather warning for fog is in force on Sunday 8 November 2026, covering London and South East England along with swathes of central, northern and western England and Wales. The alert window runs from 6 p.m. on Sunday until 11 a.m. on Monday, capturing both the late evening travel period and the Monday morning rush.

The warning states that fog is expected to become increasingly widespread during the second half of Sunday night, with some areas experiencing thick, persistent patches. Visibility is expected to fall below 100 metres at times on major approaches to the capital and on sections of the orbital motorway network.

According to published coverage from UK broadcasters, the affected zone includes London and the South East, the East and West Midlands, parts of Yorkshire and the Humber, north west England and south west England, as well as much of Wales. The dense fog risk is concentrated over inland areas where very light winds, clear skies and moist air are combining to create what forecasters describe as an ideal set-up for rapid fog formation.

The Met Office classifies fog warnings within its National Severe Weather Warning Service, which is designed to highlight conditions that may cause disruption to daily life and transport. A yellow level alert signals the potential for slower journeys and delays rather than widespread damage, but it urges travellers to plan ahead and check for updates as the situation evolves.

Road users urged to expect slower journeys and poor visibility

Forecasters indicate that the most immediate impact is likely to be felt on the road network in and around London. Thick patches of fog are forecast to form on sections of the M25, M1, M4, M3 and A1 corridors, as well as on radial routes into the city such as the A40, A2 and A13. Reduced visibility is expected to be highly variable, with sudden transitions from clearer stretches to dense banks of fog.

Guidance published by the Met Office and national road safety bodies advises drivers to allow extra time, reduce speed, increase following distances and use dipped headlights rather than full beam in foggy conditions. Rear fog lights are recommended where visibility drops below 100 metres, but motorists are advised to switch them off again once conditions improve to avoid dazzling other drivers.

Public information also stresses the importance of avoiding sudden braking and lane changes in thick fog, as these can trigger multi vehicle collisions when visibility is restricted. On rural approaches to London and in outer boroughs, a combination of fog and damp road surfaces may further lengthen stopping distances overnight and into the early morning period.

Local travel updates indicate that some planned roadworks and overnight closures are continuing despite the fog risk, meaning reduced lane capacity on stretches of the motorway and trunk road network. Drivers heading toward central London or major hubs such as Heathrow and Gatwick are being encouraged to consult live traffic feeds and allow additional time for diversions and slower conditions.

Flights and rail services face potential delays and diversions

The yellow warning also raises the prospect of disruption to air travel at London’s major airports, where low visibility can affect runway operations. Publicly available guidance from aviation operators shows that dense fog often leads to increased spacing between aircraft, the use of low visibility landing procedures and, if conditions deteriorate, temporary suspensions of arrivals or departures.

Air passengers travelling through Heathrow, Gatwick, London City, Stansted and Luton on Sunday night or Monday morning are being advised through airline and airport channels to check the status of their flights before setting out. Where visibility falls significantly below normal operating thresholds, aircraft may face delays, diversions to airports with clearer conditions or, in some cases, cancellations.

On the rail network, national travel information services indicate that the fog risk is concentrated on surface sections of railway approaching London from the Midlands, the West Country and the South Coast. While trains generally continue to run in fog, poor visibility can slow operations around busy junctions and depots, particularly in areas with level crossings or ongoing engineering work.

Passengers using early morning commuter and long distance services into London on Monday are being encouraged via public advisories to check journey planners before travel and to be prepared for minor alterations to timetables. Some operators have highlighted the possibility of slower approaches into major London termini if visibility remains particularly poor at daybreak.

Tourists and pedestrians advised to plan carefully for low-visibility conditions

The timing of the fog coincides with a busy period in the London visitor calendar, including Remembrance Sunday events and early seasonal shopping in central districts. Travel updates from media outlets note that visitors heading to ceremonial locations such as Whitehall, the Cenotaph and central London parks may encounter significantly reduced visibility both during evening travel and early on Monday.

In central areas including the West End, South Bank and the City of London, pedestrians are likely to find familiar landmarks obscured at times, with street lighting and vehicle headlights diffused by the thick, low cloud. Publicly available safety advice recommends that people walking in foggy conditions keep to well lit routes, use pedestrian crossings where possible and allow extra time for journeys between rail stations, bus stops and attractions.

Open spaces along the Thames and in larger parks such as Hyde Park and Regent’s Park can become disorienting in heavy fog, particularly in the hours before dawn. Visitor information guides suggest sticking to main paths, staying aware of water edges and avoiding the use of headphones at high volume, so that approaching bicycles or vehicles on shared paths can be heard despite the muffling effect of the fog.

London’s river transport services may also be affected if visibility along the Thames drops below safe operating levels. Operators have previously reduced or suspended some river bus and sightseeing sailings in similar conditions, and travellers relying on these links into central London are being directed via service updates to confirm departures on the day.

How long the fog is expected to last and where to check updates

Forecasts suggest that the thickest fog will develop late on Sunday evening and into the early hours of Monday, with gradual lifting to mist and low cloud as the morning progresses. The Met Office warning currently indicates that conditions should steadily improve through late morning, although some inland areas around London may see low visibility persist for longer where light winds and high humidity remain in place.

Weather charts show that the fog risk is being driven by a relatively stable area of high pressure over the UK, leading to clear overnight skies, light winds and cooling air at the surface. These factors allow moisture near the ground to condense rapidly after sunset, creating widespread radiation fog that can be slow to clear once established.

The Met Office has highlighted in its public material that yellow warnings can be updated, expanded or cancelled as new observational data comes in. Travellers and residents are therefore being encouraged via broadcast and online channels to monitor the latest forecasts and warning maps through Sunday night and Monday morning.

Transport operators, including national rail companies, London’s integrated transport authority and major airport groups, are also using their own alert systems and social media feeds to flag any delays or changes linked to the fog. For anyone with time sensitive journeys, from early morning flights to peak hour commuter trips into central London, the consistent message across public information sources is to check before travelling and to be prepared for slower than usual conditions while the thick fog lingers.