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LONDON, ENGLAND - OCTOBER 18: Sadiq Khan, Mayor of London speaks to the spectators during the Olympics & Paralympics Team GB - Rio 2016 Victory Parade at Trafalgar Square on October 18, 2016 in London, England. (Photo by Dan Mullan/Getty Images)

LONDON, ENGLAND - OCTOBER 18:  Sadiq Khan, Mayor of London speaks to the spectators during the Olympics & Paralympics Team GB - Rio 2016 Victory Parade at Trafalgar Square on October 18, 2016 in London, England.  (Photo by Dan Mullan/Getty Images)