Critics of the Dome are dismissed as negative and cynical. This can surely not be a description of Blair flag-waver Paul Johnson, the wild-haired polemicist. But what is this? 'The Dome was a dubious concept from the start, for it essentially consisted of constructing an enormous empty building before deciding what to put in it. This went against all the principles of architecture, since Imhotep first invented it in the third millennium BC. He knew exactly what he was going to put into his Step Pyramid and its accompanying buildings, and they still stand nearly 5000 years later. The Dome concept starts with a building and then invents a need. It makes no sense' - Paul Johnson, in the Spectator.