FOUR people have been killed as a result of the sub-zero temperatures, after two froze to death and another two died on icy roads following the disastrous weather.
The freezing conditions have prompted health chiefs to issue a cold weather alert as temperatures plummeted as low as -9C in parts of the country overnight.
A homeless dad-of-three is thought to have frozen to death in his tent overnight while an elderly woman who had gone missing was found dead this afternoon.
The 57-year-old Lithuanian rough sleeper was found dead inside a tent in Wakefield in West Yorkshire, where he lived after moving around cities in the North.
FROZEN TO DEATH
The tragic deaths came after two pedestrians died in collisions with trucks on fog-hit roads as temperatures fell to -10C in Britain.
The sad news comes after a body was found in Scotland early this afternoon in the search for Helen Maider, 89, who went missing in the cold weather in the early hours in Bishopbriggs, East Dunbartonshire.
Public Health England (PHE) is urging people to look out for those most at-risk as Britain is braced for bitterly cold conditions this week.
Experts warn that freezing fog, which has already caused chaos for commuters, can increase the risk of deadly heart attacks and stroke.
Earlier today, a male pedestrian was hit and thrown across the M4 between Langley and Slough in Berkshire at about 3.45am, with police closing the motorway for nearly six hours.
The man was hit between the hard shoulder and the first lane, as Thames Valley Police said "driving conditions at the time were foggy and visibility was poor".
One hour later, another man was knocked down and killed on the A34 near Winchester at 4.45am - with Hampshire Constabulary now probing whether the foggy conditions were also to blame.
The man was later identified as a 19-year-old from Billericay, Essex.
Temperatures dropped to nearly minus 10C on Monday night - the coldest of the autumn so far.
According to the Met Office, the mercury fell to minus 9.9C (14.2F) in Braemar, north-east Scotland, on Monday night.
Nine of the 10 coldest locations overnight were north of the border, but the coldest location in England was Redesdale Camp in Northumberland, where the temperature was recorded at minus 7.1c (19.2F).
A yellow weather warning for dense and freezing fog was in place across large parts of England and eastern Wales.
According to the Met Office, the freezing fog will "linger" across parts of England and Wales throughout the day.