Astronomers mark the start of spring as the vernal equinox, which fell on 20 March this year. But an extra dollop of wintry weather may arrive long after spring has supposedly sprung.
On the night of 22-23 March 2013, Britain experienced its severest snowfall for years. Up to 41cm was recorded by the Met Office in the north of England, with drifts of more than 2 metres reported in places.
