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TAYNUILT, UNITED KINGDOM - APRIL 22: Alan Reid, the Liberal Democrat candidate for Argyll and Bute, leaflets a house on April 22, 2010 in Taynuilt, Scotland. The General Election, to be held on May 6, 2010 is set to be one of the most closely fought political contests in recent times with all main party leaders embarking on a four week campaign to win the votes of the United Kingdom electorate. (Photo by Jeff J Mitchell/Getty Images)

TAYNUILT, UNITED KINGDOM - APRIL 22:  Alan Reid, the Liberal Democrat candidate for Argyll and Bute, leaflets a house on April 22, 2010 in Taynuilt, Scotland. The General Election, to be held on May 6, 2010 is set to be one of the most closely fought political contests in recent times with all main party leaders embarking on a four week campaign to win the votes of the United Kingdom electorate.  (Photo by Jeff J Mitchell/Getty Images)