Why do people have such naïve views about weather? We were all taught all we need to know in third form geography: that the Atlantic seaboard of Europe - from Norway to Portugal - is a maritime climate zone characterised by mild winters, cool summers, rain at all times of the year and unpredictability. The further south you go, the warmer it will be when the sun shines. There are things we know now about the jet stream, and its influence on weather, but as long as the Earth rotates in the direction it does now, and we are stuck on the eastern side of a very large body of water, we shall have unpredictable weather. But it does give us all something to talk about ...