Video PlayerClose

British Prime Minister Theresa May (L) and British ambassador to the EU Tim Barrow arrive at the EU headquarters for an EU Summit in Brussels, Belgium, Dec. 14, 2017. (Xinhua/Ye Pingfan)

British Prime Minister Theresa May (L) and British ambassador to the EU Tim Barrow arrive at the EU headquarters for an EU Summit in Brussels, Belgium, Dec. 14, 2017. (Xinhua/Ye Pingfan)