British Liberal Democrat member and candidate for Mayor of London, Caroline Pidgeon speaks during the 'London Tomorrow: Shaping Future Cities' event at in London on January 28, 2016. 
Elections for the next mayor of London are set to be held in May to decide who should follow current Conservative Mayor Boris Johnson, one of Britain's best-known politicians, into City Hall. While the mayor of London has fewer powers than in comparable world cities such as New York, it is a high-profile job which usually attracts ambitious figures.
 / AFP / JUSTIN TALLIS        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)