My swimming lessons are always about so much more than just swimming. At the beginning of the class I always ask the children if they have any news. Yesterday for one group, their news was that they were studying the stone age at school. One little chap told me that they had read a story in which a stone age boy mentioned that he was living in the stone age. ‘But our teacher told us that is an anachronism.’ I had to go home and look it up. Turns out he is right. He is five. He’s also a very good swimmer.