By Benedict Tetzlaff-Deas Arctic conditions will batter the UK from two directions as a new cold snap bites, according to new weather forecasts. Temperatures are expected to plummet over the next few days, beginning a cold spell that looks set to stick around for much of January. The Met Office warned on social media that Brits will “need that winter coat” as the weekend approaches, with highs of only 4C across many areas during the day and freezing temperatures overnight. Weather maps from WXCharts meanwhile show a wintry weather front moving in from the northwest on Sunday January 14, bringi…