A new yellow weather warning for has been issued for parts of England until Wednesday morning.
The Met Office on Tuesday night said the warning had been issued for London, as well as the south west and south east of England, and is in place until 8am on Wednesday.
“Freezing fog will lead to difficult driving conditions and could cause travel delays in some areas,” the Met Office warning read.
The Met Office said “patchy freezing fog” would be dense at times overnight, but should clear on Wednesday morning.
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However, visibility as low as 50 to 100 metres was likely in a few areas and some untreated surfaces could turn icy, resulting in “potentially difficult driving conditions”.
Commuters have been told to brace for delays both on the road and on public transport services. There is also a chance of delays or cancellations to flights.
The Environment Agency has 23 flood warnings in place across England.