Brits should brace themselves for a blanket of snow as high as 20cm as a -9C ice blast hits the UK. Next week, parts of Britain will be hit with a frosty spell that will result in heavy snowfall, turning weather maps blue and white. In the north, temperatures will plummet to a chilling -9C, whilst a snow depth as high as 20cm is expected in Scotland The snowfall and ice blast will impact Scotland and parts of northern England, with the frostiest day coming on December 21. The Met Office forecast for 17-26 December: “It now looks probable that there will be at least one short-lived colder inter…