Weather maps have turned purple as the UK faces more heavy snow after what was expected to be the coldest night of winter. Brits face further travel chaos with snow and ice warnings in place from the Met Office while temperatures may not get above freezing in most parts of the country today. As icy conditions persist, motorists are being urged to stick to major roads that are most likely to have been gritted. Car insurer RAC said it has seen the highest levels of demand for rescues in a three-