Britain's Queen Elizabeth is seen touring the Foreign and Commonwealth Office during a visit to mark her Diamond Jubilee in central London in this December 18, 2012 file photograph. The Queen has cancelled a visit to Swansea on March 2, 2013, because she is suffering from gastroenteritis, a Buckingham Palace spokesman said. REUTERS/Alastair Grant/Pool/Files (BRITAIN - Tags: SOCIETY ROYALS)