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LONDON, ENGLAND - JUNE 09: Deputy Prime Minister and leader of the Liberal Democrats, Nick Clegg speaks at Bloomberg's central London headquarters on June 9, 2014 in London, England. Mr Clegg was delivering his first speech since his parties poor results at the European election. (Photo by Dan Kitwood/Getty Images)

LONDON, ENGLAND - JUNE 09:  Deputy Prime Minister and leader of the Liberal Democrats, Nick Clegg speaks at Bloomberg's central London headquarters on June 9, 2014 in London, England. Mr Clegg was delivering his first speech since his parties poor results at the European election.  (Photo by Dan Kitwood/Getty Images)