Britain's winter ends tomorrow with further indications of a striking environmental change: snow is starting to disappear from our lives.
Sledges, snowmen, snowballs and the excitement of waking to find that the stuff has settled outside are all a rapidly diminishing part of Britain's culture, as warmer winters - which scientists are attributing to global climate change - produce not only fewer white Christmases, but fewer white Januaries and Februaries.
The first two months of 2000 were virtually free of significant snowfall in much of lowland Britain, and December brought only moderate snowfall in the South-east. It is the continuation of a trend that has been increasingly visible in the past 15 years: in the south of England, for instance, from 1970 to 1995 snow and sleet fell for an average of 3.7 days, while from 1988 to 1995 the average was 0.7 days. London's last substantial snowfall was in February 1991.
Global warming, the heating of the atmosphere by increased amounts of industrial gases, is now accepted as a reality by the international community. Average temperatures in Britain were nearly 0.6°C higher in the Nineties than in 1960-90, and it is estimated that they will increase by 0.2C every decade over the coming century. Eight of the 10 hottest years on record occurred in the Nineties.
However, the warming is so far manifesting itself more in winters which are less cold than in much hotter summers. According to Dr David Viner, a senior research scientist at the climatic research unit (CRU) of the University of East Anglia,within a few years winter snowfall will become "a very rare and exciting event".
"Children just aren't going to know what snow is," he said.
Fast forward to 2010.
Christmas travellers are facing severe disruption as heavy snow falls across many parts of the UK.
Airport closures have hit thousands of passengers. Heathrow expects some flights to depart from 0600 GMT, while many Gatwick flights remain cancelled.
Roads, railways and airports are affected across the UK, amid severe weather warnings for many areas.
Airports in Germany, France, Italy and the Netherlands are also suffering cancellations and delays.
The snow is forecast to continue in many parts of the UK, with up to 25cm expected in some areas of England, and a number of severe weather warnings are in place.
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