Liam Fox may have been a great GP. He may even have been a good Defence Secretary. But he doesn’t seem to know much about trade. Which is a shame, given that he is now the Secretary of State for International Trade.

In his ill-judged comments about lazy business bosses who like playing golf but can't be bothered to export, Fox made a less obvious gaffe. "We've got to change from the cartographer's view of the world to the mercantilist view of the world," he said.