Britain's Supreme Court will begin hearing on Monday the Government's appeal against a ruling that it must obtain Parliamentary approval before triggering its exit from the European Union. All 11 Supreme Court judges will begin four days of appeal hearings, with a decision due in January.<br/><br/>The High Court has ruled last month that Prime Minister Theresa May's government did not have the power to invoke Article 50 of the Lisbon Treaty, the formal procedure for leaving the EU. The judgement prompted fury amongst Brexit supporters who fear that lawmakers, who are overwhelmingly in favour of staying in the EU, may seek to delay or soften Britain's withdrawal.<br/><br/>Following a heated and divisive campaign, Britons voted by 52 percent to leave the EU in the June 23 referendum.