COLCHESTER, ENGLAND - APRIL 24:  Nick Clegg, the Deputy Prime Minister and leader of the Liberal Democrats, chats to Dom Bearman, aged 4, as he plays with a sock puppet at Nannas Day Nursery on the day he launched the Liberal Democrat 2014 European Election Campaign and manifesto on April 24, 2014 in Colchester, England. The Liberal Democrats are regarded as the most pro-European of the UK's major political parties ahead of the European Parliament elections which take place on May 22, 2014.  (Photo by Oli Scarff/Getty Images)