British Paymaster General and Minister for the Cabinet Office Ben Gummer arrives for the weekly cabinet meeting at 10 Downing Street in central London on March 29, 2017. British Prime Minister Theresa May will formally launch Brexit today after signing the letter to begin the country's departure from the European Union. / AFP PHOTO / Daniel LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)