The Labour government’s worrying lack of ambition in Europe

Sir Keir Starmer, Britain’s prime minister, says that he has a “once-in-a-generation opportunity” to turn the corner on Brexit. He is right. He was propelled to power in July by a largely pro-European electoral coalition. The leading lights of the Brexit era—Boris Johnson, Michael Gove, Sir Jacob Rees-Mogg—are figures of the past. And Britons themselves show plenty of signs of regret for the decision made in 2016. A clear majority of them now consider it a mistake.