LONDON, ENGLAND - MAY 03: The Al-Muzzamil mosque which is attended by London mayoral candidate Sadiq Khan, in his constituency of Tooting, pictured on May 3, 2016 in London, England. Sadiq Khan is standing as the mayoral candidate for the Labour Party and will be the first London mayor from one of London's ethnic minorities, should he be voted in when the UK's capital city goes to the polls tomorrow. (Photo by Mary Turner/Getty Images)
