U.K. Labour Party Would Back Second Brexit Referendum

Labour leader Jeremy Corbyn, previously lukewarm to fresh vote on U.K.’s exit from EU, changes course

With U.K. lawmakers rejecting Theresa May’s Brexit deal, WSJ’s Stephen Fidler explores what options remain available to the prime minister before the country is scheduled to leave the EU on March 29.

LONDON—The U.K.’s main opposition Labour Party said it would support holding a second Brexit referendum, a policy shift that breathes some life into the prospect of Britons voting again on whether the U.K. should leave the European Union.

As political pressures rise with the approach of Britain’s scheduled departure date of March 29, Labour leader Jeremy Corbyn said in a statement on Monday the party would back another referendum—which could potentially reverse the result of the one in 2016—if his call is ignored for a Brexit...