Britain is due to leave the European Union at the end of this month, and with parliament yet to approve Prime Minister Theresa May’s exit deal, calls for a second referendum to break the deadlock, often dubbed a ‘people’s vote’, have intensified. Last month, the opposition Labour Party broke new ground for one of the major parties by saying it would support a new referendum on May’s deal after parliament defeated its alternative Brexit plan. Labour’s position could face its first test on Tuesday when May’s deal is brought back to parliament.