direct to your inboxTemperatures plunged to below minus 21C overnight, the lowest in the UK in more than a decade, following an 'extreme freeze'.The mercury dropped to minus 21.4C in Braemar, Aberdeenshire.That's the coldest temperature recorded in the UK since December 2, 2010, when it dropped to minus 21.3C in Altnaharra in the Scottish Highlands.The Met Office said the last time a temperature below minus 20C was recorded in the UK was December 23, 2010.In Manchester temperatures fell to minus