Brits are being warned of snow and ice with temperatures dipping to -5C making it colder than Iceland capital Reykjavik.
Arctic air has been moving in from the north bringing a shock return to wintry conditions after the balmy weather last week where there were highs of 20C.
The Met Office has issued a yellow warning for snow and ice in northern Scotland, which is running through Tuesday night and until 10am on Wednesday morning.