Democracy reporter Noah Vickers explains everything you need to know with 100 days until the London mayoral election. Sadiq Khan on Tuesday warned his supporters that there was “every chance the Tories could win in London” as the countdown to the mayoral election hit 100 days.The Labour Mayor and his Conservative rival Susan Hall traded barbs as Mr Khan claimed that changes to the voting system could make it easier for her to secure victory, despite polls suggesting that he is well on course for a record third term.