Heavy fog triggers UK travel warning and commuter delays

Thick fog hanging over large parts of the United Kingdom has prompted a widespread weather warning and led to a difficult start to the working week, with drivers, rail passengers and airline customers facing slower journeys and disruption on Monday morning.

Yellow fog warning stretches across central and southern UK

The Met Office has placed a yellow warning for fog over a broad swathe of the country, covering much of Wales, central and eastern England and parts of the South East from 18:00 on Monday 9 November until 10:00 on Tuesday 10 November 2026. Publicly available guidance describes the risk of visibility falling below 100 metres, creating hazardous driving conditions and raising the prospect of delays on major routes.

The latest alert follows an earlier warning that ran from Sunday evening into late Monday morning, affecting areas from York to Bath and much of the South East. National forecasters classify the current alert as carrying a high likelihood of fog with a moderate impact, indicating that transport disruption is possible but not expected to reach the most severe thresholds.

The warning zone includes parts of the East Midlands, West Midlands, North West England, Yorkshire and Humber, the East of England, Wales and sections of London and the South East. Regions such as Greater Manchester, the West Midlands conurbation, Gloucestershire, Hertfordshire and Lincolnshire are among those highlighted on the Met Office map.

Guidance from the National Severe Weather Warning Service indicates that yellow alerts signal conditions that may cause some disruption to travel and daily life, with road users urged to take extra care and allow more time for their journeys.

Road commuters face reduced visibility and slower journeys

Reports from across England and Wales on Monday morning described motorway corridors shrouded in dense fog, including stretches of the M11 in Essex and key routes through the Midlands. Images carried by national broadcasters showed vehicles moving slowly with headlights cutting through thick, low-lying cloud.

According to the Met Office advisory, drivers in the warning area are being asked to expect slower journey times, localised congestion and a higher risk of minor collisions where visibility suddenly deteriorates. The guidance emphasises the importance of checking that fog lights are working before setting out and switching them on when visibility drops significantly.

Local resilience documents published by councils and transport bodies note that fog can quickly reduce capacity on major roads as drivers increase spacing and reduce speed, creating knock-on delays during peak commuter periods. Safety leaflets produced for community resilience planning highlight fog as a recurring winter hazard for road travel alongside ice, snow and heavy rain.

Police and highway authorities routinely advise motorists in such conditions to avoid sudden braking, maintain larger gaps from the vehicle in front and remain alert for pedestrians and cyclists who may be difficult to see at junctions and crossings.

Rail and air passengers warned to expect disruption

The current fog episode is also affecting public transport, with rail and air passengers advised to plan for potential delays and short-notice changes. The Met Office warning notes that slower journey times are possible on bus and train services where reduced visibility requires more cautious operations.

Coverage in UK media on Monday highlighted disruption to schedules at London Heathrow, where fog has periodically limited operations, as well as knock-on effects at other airports across southern England and the Midlands. Aviation guidance referenced by climate and transport studies points out that dense fog can restrict landings and take-offs, leading to delays and cancellations while conditions persist.

Sky News and other broadcasters reported that forecasters are flagging the risk of cancellations or delays on travel networks through Monday night and into Tuesday morning, particularly for early flights and long-distance rail services crossing the warning area. Travellers are being encouraged to check live departure boards and operator updates before leaving for airports or stations.

National rail operators generally allow passengers to use tickets on alternative services when weather-related disruption occurs, and consumer advice sites recommend keeping digital copies of bookings and monitoring operator channels closely during active severe weather alerts.

Why conditions are ripe for persistent fog this week

Weather summaries published on Monday describe a pattern of light winds, clear skies overnight and moist air near the surface, which forecasters say create the ideal set-up for radiation fog. With early November bringing longer nights, ground temperatures have been dropping sharply after sunset, allowing fog to form and then linger well into the following morning commuting period.

The Guardian and other national outlets reported that experts have characterised the current pattern as a near perfect recipe for persistent fog, with little breeze to disperse it once formed. Early November is a climatologically favoured time for such conditions in the UK, sitting between the warmth of late summer and the colder, windier regimes more typical later in winter.

According to background material from the Met Office and local resilience guides, fog of this kind tends to form first in rural and low-lying areas, including river valleys, but can quickly expand to cover urban corridors and major transport routes. The patchy nature of the phenomenon means conditions can change from clear to severely restricted visibility within a short distance.

Forecast guidance issued alongside the latest alert suggests that fog is expected to redevelop during Monday evening, becoming dense in places, before gradually thinning and clearing through Tuesday morning as daytime heating and a slight increase in wind help disperse it.

Advice for travellers as the warning period continues

Travel and resilience information produced by public bodies and transport operators during previous fog events sets out a series of practical steps for those planning to move around while the current warning remains in force. Motorists are advised to allow extra time, check local travel bulletins and ensure that windows, mirrors and lights are clean before departure.

Passengers using rail, coach or domestic air services are urged to verify their journeys on the morning of travel and again shortly before departure, as timetables may be adjusted at short notice when visibility falls below operational limits. Many operators provide real-time updates via apps, social media channels and station displays.

Guidance documents on the UK alerting system emphasise that yellow warnings are designed to prompt people to stay informed and consider whether journeys are essential when conditions are at their worst. For those able to adjust plans, remote working or travelling outside the most affected hours can help ease pressure on the network during peak congestion.

With the present alert scheduled to run into late Tuesday morning, travel planners expect that disruption will be most acute around the Monday evening and Tuesday dawn rush hours. Commuters and visitors are being encouraged to monitor the Met Office forecast and local travel news closely, as updates to the warning area or timing remain possible if conditions change.