A racegoer poses for a photograph as she arrives on day one of the Royal Ascot horse racing meet, in Ascot, west of London, on June 18, 2019. - The five-day meeting is one of the highlights of the horse racing calendar. Horse racing has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course while a daily procession of horse-drawn carriages brings the Queen to the course. (Photo by Adrian DENNIS / AFP)

Racegoers arrive to attend day one of the Royal Ascot horse racing meet, in Ascot, west of London, on June 18, 2019. - The five-day meeting is one of the highlights of the horse racing calendar. Horse racing has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course while a daily procession of horse-drawn carriages brings the Queen to the course. (Photo by Adrian DENNIS / AFP)

Racegoaers arrive to attned day one of the Royal Ascot horse racing meet, in Ascot, west of London, on June 18, 2019. - The five-day meeting is one of the highlights of the horse racing calendar. Horse racing has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course while a daily procession of horse-drawn carriages brings the Queen to the course. (Photo by Adrian DENNIS / AFP)