A woman wears an ornate hat on the first day of the Royal Ascot horse race meeting at Ascot, England, Tuesday, June, 14, 2016. (Photo by Alastair Grant/AP Photo)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of a EU themed dress. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of a hat. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of racegoers in Britain and EU referendum themed dresses. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. Racegoers in Britain and EU referendum themed dresses. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. Racegoers in Britain and EU referendum themed dresses. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of a EU referendum themed hat. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. A racegoer with a plastic cover over his Tophat. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. Racegoers before the races begin. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. A racegoers hat. (Photo by Andrew Boyers/Reuters/Action Images/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of a racegoers waistcoat before the races. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of a racegoers hat before the races. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. A racegoer shields herself from the rain. (Photo by Andrew Boyers/Reuters/Action Images/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. General view of racegoers. (Photo by Andrew Boyers/Reuters/Action Images/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 14, 2016. A racegoers hat. (Photo by Andrew Boyers/Reuters/Action Images/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 15, 2016. General view of a racegoers hat as she arrives. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 15, 2016. General view of a turf account with a board displaying odds for the colour of Britain's Queen Elizabeth's outfit today. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 15, 2016. Racegoers buy race cards. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 15, 2016. Racegoers. (Photo by Toby Melville/Reuters/Livepic)





Britain Horse Racing, Royal Ascot, Ascot Racecourse on June 15, 2016. Racegoer takes a photo. (Photo by Andrew Boyers/Reuters/Action Images/Livepic)





Racegoers arrive on the first day of the Royal Ascot horse racing meet, in Ascot, west of London, on June 14, 2016. (Photo by Justin Tallis/AFP Photo)





A lady arrives for the second day of Royal Ascot at Ascot Racecourse on June 15, 2016 in Ascot, England. (Photo by Chris Jackson/Getty Images)





Ladies walk from the race course on day one of Royal Ascot in Ascot, Britain, 14 June 2016. The Royal Ascot is a five-day social/horsing event. (Photo by Andrew Cowie/EPA)