When exactly will Britain leave the EU? UK parliament debates

When exactly will Britain leave the European Union?Parliament started hours of debate on Tuesday by arguing over when the two-year negotiating period for Brexit should end and whether there should be a fixed time at all.It was just the first day of what promises to be a lengthy set of debates in parliament on Prime Minister Theresa May's blueprint for leaving the EU - debates that will challenge her diminished authority and could force changes to her Brexit plan.