The UK Met Office has today increased its Cold Weather Warning to a level 3 status as shivering temperatures are expected to drop even further.
The thermometer mercury could plunge as low as -10C across parts of England as polar conditions bring with it ice and snow.
The level 3 Cold Weather Warning is designed to trigger NHS emergency plans with forecastst predicting no let up in the big freeze until next weekend.
Thursday is expected to be the coldest night of the winter so far as a high pressure system over Northern Europe pushes easterly winds across the UK.
London is also to be affected with daytime temperatures unlikely to rise above 2C.
Chris Tubbs, Chief Forecaster at the Met Office, said: "At the moment we have a high pressure system over eastern Europe trying to push cold air in from the east, while milder Atlantic air is trying to push in from the west.
"The colder air is set to win over the next few days, bringing snow to western areas this morning. Looking further ahead into February, there is uncertainty over how this finely balanced situation will play out, with colder conditions more likely to dominate but milder weather could still return."