A major road across the Pennines has been closed as an Arctic blast brought snow, ice and freezing temperatures to Scotland and northern England. The Met Office said widespread travel disruption was likely on Friday as it issued two yellow warnings that will remain in place until noon. Freezing temperatures have led to a four-day health alert for cold weather. In Scotland, the warning is for snow showers as deep as 10cm on high ground and 2cm on low ground. Freezing temperatures could make driving dangerous, forecasters say, and journey times for people could be longer. In large parts of northern England, the warning is for rain, sleet and snow which could mean slippery pavements, icy roads and disruption to public transport. On high ground, above 300 metres, there could be 10cm of snow settling. A snow plough clears the road on the A66 in Durham, north-east England. Photograph: Owen Humphreys/PA Media On Friday morning, National Highways said the A66 was closed between the A67 near Bowes in County Durham and the A685 near Brough …