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POOLE, ENGLAND - APRIL 27: Deputy Prime Minister Nick Clegg meets children at the Tops Day Nursery in Corfe Mullen as he canvasses with Liberal Democrat candidate for Mid Dorset and North Poole Vicki Slade (L) on April 27, 2015 near Poole, England. As the campaign enters the final ten days the country's political parties are stepping up the campaign to appeal for votes from the indecided electorate. (Photo by Matt Cardy/Getty Images)

POOLE, ENGLAND - APRIL 27:  Deputy Prime Minister Nick Clegg meets children at the Tops Day Nursery in Corfe Mullen as he canvasses with Liberal Democrat candidate for Mid Dorset and North Poole Vicki Slade (L) on April 27, 2015 near Poole, England. As the campaign enters the final ten days the country's political parties are stepping up the campaign to appeal for votes from the indecided electorate. (Photo by Matt Cardy/Getty Images)