A yellow weather warning has been issued in Southampton as the city is covered in a thick layer of fog today. 

The warning has been put in place from 4am until 9am today but much of the fog is set to remain into the morning. 

Drivers are being told to allow extra journey time as traffic is likely to be heavy as a result of the weather conditions. 

This comes as Southampton is already set to congested with the exit slip road at junction 7, Hedge End, closed for road works.

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A spokesperson for the Met Office said: "Areas of fog, including some dense patches reducing visibility to less than 100 metres at times, will impact travel during the morning rush hour.

"Fog will, however, slowly lift and clear through this morning.

"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."