The birth of the New Year was celebrated with the usual razzmatazz. In London, revellers welcomed the start of a new decade with fireworks displays, as did many people in Edinburgh and other major cities. No doubt, Britain’s new Prime Minister Boris Johnson was celebrating even more enthusiastically than most other people. Having won the 2019 general election with a handsome majority, he is now free to lead the nation to a successful conclusion of the Brexit negotiations. That, at least, is the theory.