The Met Office has announced snow and ice warnings for parts of Scotland and England as a cold front moves in from the Arctic, ushering in a significant drop in temperatures. Starting Sunday, heavy snow is anticipated on higher ground in southern Scotland and northern England, while widespread frost will prevail. This weather shift is attributed to a blocking high-pressure system over Greenland, coupled with bitter northerly winds. Although colder conditions typically occur in winter, the late November timing means temperatures are expected to be milder than they would be later in the season.