British Prime Minister David Cameron reacts as he departs 10 Downing Street enroute to the Houses of Parliament in central London on June 27, 2016.
The British government on Monday agreed to establish a new civil service unit that will have the complex task of negotiating the country's departure from the European Union, outgoing Prime Minister David Cameron's spokeswoman said. London stocks extended their losses in early afternoon Monday, led by banking, airline and property shares, following Britain's vote to leave the EU. / AFP / LEON NEAL        (Photo credit should read LEON NEAL/AFP/Getty Images)