LONDON, ENGLAND - APRIL 27: London Mayor and Parliamentary candidate for Uxbridge and South Ruislip, Boris Johnson, squeezes past school girls as they attempt to take a selfie photograph with him as he meets supporters and members of the public on April 27, 2015 in Enfield, London, England. Boris Johnson spoke in support of local Conservative candidate Nick de Bois during a visit to the north London constituency as campaigning continues ahead of the general election. (Photo by Carl Court/Getty Images)