The astonishing has happened at Stonehenge. Some prehistoric force has driven ministers to make a decision. It is to spend half a billion pounds burying the adjacent A303 in a tunnel, to bring ‘tranquillity’ to the ancient place. The result has been a predictable outcry from protestors. The television historian Dan Snow has compared the Transport Secretary, Chris Grayling, with Isis in Palmyra: ‘vandals and zealots who destroy ancient artefacts’.