Severe winter weather has brought transport disruption to parts of Europe. In the UK, thousands of schools were closed and travellers have been hit by major delays after heavy snowfall left swathes of the country at a halt. Temperatures as low as -22C have left 122 dead in Poland this winter, while in central Norway temperatures plummeted to -41C on Wednesday.. In the Swiss Alps avalanches have killed at least seven people. A weather alert has been issued for 14 regions in south-western France that were hit by heavy snow. Extreme or severe weather warnings are still in place across the UK, which is in the grip of its longest cold spell for almost 30 years..