Prime Minister Boris Johnson will hold talks on post-Brexit trade with the top US diplomat on Thursday, eve of Britain’s historic departure from the European Union. The British premier will aim to paper over recent disagreements as he hosts US Secretary of State Mike Pompeo the day before nearly half a century of EU membership ends late Friday. With Britain at a historic crossroads, Johnson wants to strike post-Brexit trade deals with both the bloc and the US, but has seen recent strains in the so-called “special relationship” with Washington.