The Met Office has issued a new weather warning for fog. The yellow weather alert was released in the early hours of Friday, and it came into force at 4.04am on January 16. It will remain in place until 9am. 

The weather alert warns fog "may cause some disruption to travel early today". The national weather forecaster said people living and travelling in the affected areas should expect "slower journey times with delays to bus and train services" as well as "delays and cancellations to flights".

The Met Office explained that "fog patches, dense in places with visibility below 100 metres, will slowly thin and lift this morning".

The weather alert warned: "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 closest international airport to the areas affected by the warning is Newcastle International Airport.