London commuters should brace themselves for frosty starts as weather forecasters predict more fog and minus temperatures and issue warnings.
A yellow weather warning has been issued for London and drivers are urged to travel safely on what could be slippery roads.
The Met Office wrote: "Please be aware that untreated surfaces such as pavements and some minor roads are likely to turn very slippery later Monday night and Tuesday morning.
"A few freezing fog patches are also possible."
The cold snap is here to stay for the week, with figures plunging to below zero degrees on Tuesday (December 4).
A spokesman for the Met Office said for Tuesday and Wednesday, it will be "A frosty start with icy patches, then a dry day with scattered or broken cloud."
They added: Some sunny periods are likely and it will be feeling cool in the westerly breeze."
Wednesday is also set to bring rain and is forecast to be -1 degree, although that is predicted to be a short spell, with the rest of the day "turning colder with often sunny skies" and patchy rain for the rest of the week".
The adverse weather has come after moister air comes into contact with cold air from overnight, causing frost to form and making roads hazardous, according to meteorologists.
Last week saw a string of travel issues for Londoners after flights were delayed from Heathrow Airport due to foggy conditions for four days.
A Heathrow Airport to Oxford coach also overturned in thick fog on the M40 on Friday (December 30) leaving 17 injured.
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