Wall Street Journal: The U.K. leaves the European Union behind today, 48 years after it joined the bloc, a significant shift in the global order that will also bring big changes for ordinary Britons. On Jan. 1, decades of trade with the EU unencumbered by customs declarations and regulatory obstacles will cease, one of several changes likely to have big and lasting effects on the British economy. The rights of a U.K. citizen to live, work or study in any other EU member state will also fall away, highlighting the extent of the EU’s reach into its citizens’ daily lives. EU citizens will also lose those rights in the U.K.