LONDON, ENGLAND - FEBRUARY 27:  German Chancellor Angela Merkel and British Prime Minister, David Cameron (not pictured) attend a joint press conference at 10 Downing Street on February 27, 2014 in London, England. Merkel is on a one-day visit to the UK during which she will address a joint session of parliament and will also have tea with the Queen at Buckingham Palace.  (Photo by Facundo Arrizabalagaw/WPA Pool/Getty Images)