UK government issues cold weather warning - so just how chilly will it get?

A cold weather health warning is in place, after predictions Britons could be hit by colder temperatures later this month as a weakening polar vortex threatens to bring Arctic air. The polar vortex is a ring of powerful winds that helps keep freezing air near the North Pole. If it weakens, it could allow colder Arctic air to sweep south towards Britain, increasing the risk of wintry weather. • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on TikTok https://www.tiktok.com/@itvnews?lang=en Follow ITV News on Instagram: https://www.instagram.com/itvnews/ Follow ITV News on Facebook: https://www.facebook.com/itvnews/ Follow ITV News on X: https://twitter.com/itvnews