Wales and Northern Ireland recorded the lowest temperatures of 2014.
Katesbridge in County Down hit -8.8C (16.2F) while Benson, Oxon, fell to -7.6C and -6.7C was recorded in Wales, reports BBC.
Latest figures show the UK’s coldest temperature of the year was -9C in Cromdale, Moray, on Saturday.
Meanwhile the Met Office has warned that the cold weather may create health risks for vulnerable people
BBC Weather said Scotland saw temperatures fall to -7.7C in Braemar, Aberdeenshire, overnight from Sunday to Monday.