By Ryan Merrifield An urgent ice warning has been issued as temperatures plummet in the wake of severe flooding across the UK. Forecasters warned Brits would wake this morning to icy stretches of road, fog patches and frost. They also predict the temperatures will drop to -6C in rural areas along the Welsh border in Shropshire and north Herefordshire tonight. Met Office chief forecaster Jason Kelly said: “The transition to lower temperatures will be noticeable over the weekend. It will become rather cold next week with lower-than-average temperatures across much of the UK, accentuated by brisk…