CAMBRIDGE, ENGLAND - APRIL 27: Cockapoo dog 'Bonnie' is seen amongst Liberal Democrats supporters as party leader Tim Farron campaigns for the British general election at Eastfield regeneration site on April 27, 2017 in Cambridge, England. Mr Farron has been campaigning in the Cambridgshire area alongside parliamentary candidate and former MP Julian Huppert, Mayoral candidate Rod Cantrill and cadidate for South Cambridgeshire Susan Van De Ven. (Photo by Chris J Ratcliffe/Getty Images)
CAMBRIDGE, ENGLAND - APRIL 27: Cockapoo dog 'Bonnie' is seen amongst Liberal Democrats supporters as party leader Tim Farron campaigns for the British general election at Eastfield regeneration site on April 27, 2017 in Cambridge, England. Mr Farron has been campaigning in the Cambridgshire area alongside parliamentary candidate and former MP Julian Huppert, Mayoral candidate Rod Cantrill and cadidate for South Cambridgeshire Susan Van De Ven. (Photo by Chris J Ratcliffe/Getty Images)
CAMBRIDGE, ENGLAND - APRIL 27: Cockapoo dog 'Bonnie' is seen next to a European Union flag and Liberal Democrats supporters as party leader Tim Farron campaigns for the British general election at Eastfield regeneration site on April 27, 2017 in Cambridge, England. Mr Farron has been campaigning in the Cambridgshire area alongside parliamentary candidate and former MP Julian Huppert, Mayoral candidate Rod Cantrill and cadidate for South Cambridgeshire Susan Van De Ven. (Photo by Chris J Ratcliffe/Getty Images)
CAMBRIDGE, ENGLAND - APRIL 27: Liberal Democrats party leader Tim Farron walks over to pet cockapoo dog 'Bonnie' as he is campaigning for the British general election at Eastfield regeneration site on April 27, 2017 in Cambridge, England. Mr Farron has been campaigning in the Cambridgshire area alongside parliamentary candidate and former MP Julian Huppert, Mayoral candidate Rod Cantrill and cadidate for South Cambridgeshire Susan Van De Ven. (Photo by Chris J Ratcliffe/Getty Images)
Tim Farron, leader of the Liberal Democrats, strokes Bonnie, a Cockapoo, during campaigning for the U.K. general election at Eastfield regeneration site in Cambridge, U.K., on Thursday, April 27, 2017. The U.K. Liberal Democrats increased their membership to the highest in two decades as the party enters the general-election campaign pledging to fight to maintain ties to Europes single market. Photographer: Simon Dawson/Bloomberg via Getty Images
