Labour's London Mayoral candidate <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Sadiq+Khan&family=editorial&specificpeople=3431876 ng-click='$event.stopPropagation()'>Sadiq Khan</a> and member of Parliament for Tooting speaks to supporters in Montgomery Square in Canary Wharf on May 4, 2016 in London, England. Londoners will go to the polls tomorrow to vote for Mayor Of London with Labour's candidate expected to beat Conservative Party rival Zac Goldsmith to the position.