People across the country woke up to frost and in some places inches of snow as temperatures plummeted to minus 9°c - and its set to drop to -10°c tonight.
The Arctic blast dubbed the Troll of Trondheim has swept down through the Scotland and into England, Northern Ireland and Wales and led the UK Health Security Agency to declare a level three Cold Weather Action Alert.
The rarely used alert has been extended and now remains in place until Friday, December 16 as the cold weather continues to bite.
