LONDON - MAY 12: Britain's Prime Minister David Cameron, (R), and Deputy Prime Minister Nick Clegg answer questions during a question and answer session after addressing an audience of Olympic site apprentices and business leaders inside the handball arena at the 2012 London Olympic Park on May 12, 2011 in London, United Kingdom. Cameron and Clegg visited the handball arena to mark it's completion, with yesterday marking the one year anniversary of their parties first coming to power in a coalition government. (Photo by Mark Richards - WPA Pool/Getty Images)

LONDON - MAY 12: Britain's Prime Minister David Cameron, (R), and Deputy Prime Minister Nick Clegg answer questions during a question and answer session after addressing an audience of Olympic site apprentices and business leaders inside the handball arena at the 2012 London Olympic Park on May 12, 2011 in London, United Kingdom.  Cameron and Clegg visited the handball arena to mark it's completion, with yesterday marking the one year anniversary of their parties first coming to power in a coalition government.  (Photo by Mark Richards - WPA Pool/Getty Images)