The warning is in place from 8:00pm on Wednesday, 15 January, until 11:00am on Thursday, 16 January.

What to Expect

• Slower journey times with possible delays to bus and train services.
• A chance of flight delays or cancellations.
• Visibility in some areas may drop to less than 100 metres.

Affected Areas

The warning covers a wide swathe of the UK, including regions in:

• East Midlands (e.g., Derbyshire, Leicestershire, Lincolnshire)
• East of England (e.g., Bedfordshire, Cambridgeshire)
• London & South East England (e.g., Buckinghamshire, Hampshire, Oxfordshire)
• South West England (e.g., Dorset, Gloucestershire, Somerset)
• West Midlands (e.g., Herefordshire, Staffordshire, Warwickshire)
• Yorkshire & Humber (e.g., South Yorkshire, East Riding of Yorkshire)
• Parts of Wales (e.g., Cardiff, Newport, Rhondda Cynon Taf)

Travel Advice

The Met Office urges people to:

1. Check road conditions before driving and allow extra journey time. Ensure fog lights are functional.
2. Monitor updates from travel companies for bus, train, or flight delays.
3. Consider adjusting travel plans to avoid the densest fog areas.

Why the Warning?

This yellow warning indicates a medium likelihood of travel disruption but with a low impact. The fog is expected to lift in some areas by dawn but may persist in a corridor stretching from Southwest England through the Midlands to Yorkshire until late Thursday morning.

Stay Safe

• Use fog lights where visibility is less than 100 metres but switch them off when visibility improves to avoid dazzling other drivers.
• Reduce speed and keep a greater distance from the vehicle ahead.
• For rail and air travel, check with your carrier for the latest updates.

The Met Office recommends staying updated on forecasts and remaining prepared for potential changes to the warning. For more information on traveling safely in fog, visit the Met Office website.