Yellow weather warnings have been put in place across parts of the UK overnight as heavy fog blankets London.
The severe fog warnings were issued across eastern, southeastern and southwestern parts of the country overnight.
The Met Office has advised motorists to be extra careful across much of the east amid thick fog and mist.
Warning, which were put in place from 3am, will run until 10am and could cause major traffic delays.
Brits are, meanwhile, set to be battered by more freezing temperatures this week as the UK's sunny spell draws to a close.
A freezing -10C Arctic blast is set to sweep across the UK this weekend.
The Met Office is warning temperatures could plummet to -10C in parts of Scotland on Saturday morning.
It comes after a period of unseasonably warm and sunny weather across Britain, with the mercury rising to 18C in Weybourne, Norfolk, on February 24.
However, conditions have taken a turn for the worse this week with some Brits experiencing lows of 4C and thick fog.
While sub-zero temperatures are expected in areas of the UK this evening, they will be far more widespread on Saturday morning.
The Met Office said: "It may be chilly for some tonight, but it will be cold and frosty for most first thing on Saturday morning, when temperatures in some sheltered glens in Scotland could be as low as minus 10 Celsius!"