A sub-zero Arctic plume will sweep unusually warm coastal waters to unleash the first widespread snowfall of the year.

Temperatures in some areas of the UK will be significantly below average for the time of year next week - with daytime highs in London reaching just 6C (43F) and overnight lows of -1C (30F).

A​ weather pattern change in the week ahead will usher in conditions more typical of November to the central and East, ...