Weather maps across the UK have turned an icy shade of blue as temperatures are set to nosedive to -5C in certain regions on March 6, with meteorologists cautioning about biting overnight frosts and wintry spells on the horizon. The most recent weather charts reveal frigid air sweeping across Britain, bringing the possibility of snow flurries to northern territories and elevated terrain. Scotland and northern England are braced for the most severe temperatures as cloudless skies permit the