Met Office yellow fog alert puts UK travel on notice

A widespread yellow fog warning from the Met Office is in force across large parts of England and northeast Wales from the evening of Sunday 8 November until late Monday morning, with dense patches expected to cut visibility and disrupt road, rail and air travel.

Warning in place through Monday morning

According to the Met Office’s National Severe Weather Warning Service, a yellow fog warning covers much of southern and central England, the Midlands, parts of Yorkshire and Humber, northwest England and sections of northeast Wales. The alert is in place from 18:00 on Sunday 8 November to 11:00 on Monday 9 November, following an earlier overnight fog warning that extended from midnight to 10:00 on Sunday.

Publicly available information from the Met Office describes fog as “dense in places,” with visibility in some locations expected to drop below 50 metres. Forecasters indicate that the fog is likely to form widely overnight where skies remain clear and winds stay light, creating what has been described in UK media coverage as a “perfect recipe” for persistent low cloud and mist.

The yellow category reflects a combination of moderate expected impacts and a relatively high likelihood of those impacts occurring. Guidance on the Met Office warning matrix notes that yellow alerts signal a possibility of travel delays and localised disruption, even where many journeys can still go ahead.

The latest guidance also emphasises that warning areas and timings can be updated at short notice as conditions evolve. Travellers planning early-morning departures on Monday are being advised in media reports to check for updates before setting off.

Road users urged to prepare for very poor visibility

The primary concern for domestic travel is on the road network, where thick fog can quickly reduce visibility and lengthen braking distances. Met Office advice on severe weather highlights that even patchy fog banks can cause sudden changes in conditions, catching drivers out as they move from clear stretches into areas of near-whiteout.

In regions under the warning, including Greater London, the South East, the West Country, much of the Midlands and parts of northwest England, motorists are being encouraged in published guidance to allow extra time for journeys, reduce speeds and increase the distance from the vehicle ahead. Official driving safety information also recommends ensuring fog lights are working before departure and using them only while visibility is significantly reduced.

The possibility of road closures is considered lower than during snow or flooding events, but the combination of reduced visibility and damp road surfaces can still lead to minor collisions and congestion. Local transport bulletins frequently report slow traffic where dense fog lingers in river valleys, on higher ground and on exposed stretches of motorway.

Publicly available resilience planning documents from UK local authorities underline that yellow warnings can still lead to notable impacts for some drivers, particularly on rural and unlit routes that may see the thickest fog and sharp temperature drops overnight.

Rail and air travellers face risk of delays and cancellations

The National Severe Weather Warning Service notes that yellow fog alerts carry a risk of slower journey times on public transport, with delays to bus and train services possible. While rail operations are generally less sensitive to fog than to wind or flooding, low visibility can still require more cautious signalling and speed restrictions in affected areas, especially in the early morning.

Intercity and commuter services into major hubs such as London, Birmingham and Manchester may be particularly exposed to knock-on delays if fog persists through the morning peak. Travel coverage in the UK has previously documented cases where dense fog over key junctions and approaches has led to reduced line speeds and minor timetable disruption.

Fog can have a more direct impact on air travel, and the Met Office explicitly flags a chance of delays or cancellations to flights during the current warning period. Low visibility procedures at airports can increase the spacing between arriving aircraft, slowing operations even when runways remain open.

Major airports serving the warning area, including London Heathrow, London Gatwick, London Luton, Birmingham and Manchester, have established low-visibility protocols, but airlines may still adjust schedules or divert flights when visibility drops below operational thresholds. Passengers are being advised in media reporting to monitor airline updates closely on Sunday night and Monday morning and allow additional time for check-in and security in case of disruption.

Where in the UK is affected by the yellow fog alert

Met Office regional mapping for Sunday and Monday shows the yellow fog warning stretching across a broad swathe of England. Affected areas include much of the South East, East and West Midlands, East of England, sections of northwest England and the South West, along with parts of northeast Wales.

More detailed breakdowns of the alert area list numerous local authorities within the warning zone. These range from Greater London, Buckinghamshire, Oxfordshire, Hampshire and Kent in the South East, through cities and counties such as Birmingham, Warwickshire, Staffordshire and the wider West Midlands, to parts of Cheshire, Merseyside and Greater Manchester in the northwest. In Wales, counties including Wrexham and Flintshire fall within the current alert.

Earlier on Sunday, a separate yellow warning for dense fog covered parts of central southern England and the West Country, with forecasters noting that clearance would likely be slowest there. The new evening-to-morning alert expands the focus of concern north and east, reflecting updated forecasts for where the thickest overnight fog is expected.

Although Scotland, Northern Ireland and parts of northern England remain outside the present fog warning area, travellers making long-distance journeys into or through the affected regions are being encouraged by publicly available travel guidance to factor the conditions into their plans.

How travellers can minimise disruption

Public-facing Met Office advice on severe weather stresses that even when impacts are expected to be moderate, some simple steps can reduce the risk of disruption. Before driving, travellers are encouraged to consult the latest weather forecast for their route and check for any incident reports on key roads. Leaving additional time, carrying warm clothing and ensuring mobile phones are charged are all common recommendations for early-morning trips during autumn and winter fog events.

Those using rail services can reduce the risk of missed connections by checking journey planners on the morning of travel and allowing a buffer for potential delays, especially into major city centres that may be shrouded in fog. For air passengers, the most important actions highlighted in travel coverage include monitoring airline notifications and considering flexible ticket options where available.

Resilience leaflets produced in partnership with the Met Office note that while many people will be able to continue with everyday routines during a yellow warning, a minority may experience more severe impacts. For travellers, this can mean missed appointments, longer commutes or altered flight itineraries if fog persists longer than forecast.

With the current yellow fog warning crossing into the Monday morning rush hour, transport operators and passengers across affected parts of England and Wales face an unsettled start to the working week, even if the eventual disruption remains patchy and localised.