David Cameron Casts His Vote In The London Mayoral Election

LONDON, ENGLAND - MAY 05: Samantha Cameron casts her vote in the London Mayoral Election on May 05, 2016 in London, England. This is the fifth mayoral election since the position was created in 2000. Previous London Mayors are Ken Livingstone for Labour and more recently Boris Johnson for the Conservatives. The main candidates for 2016 are Sadiq Khan, Labour, Zac Goldsmith , Conservative, Sian Berry, Green, Caroline Pidgeon, Liberal Democrat, George Galloway, Respect, Peter Whittle, UKIP and Sophie Walker, Woman's Equality Party. Results will be declared on Friday 6th May. (Photo by Neil P. Mockford/Getty Images)