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Britain's Queen Elizabeth II (C) and the Queen's racing manager, John Warren (L) watch the racing on the second day of the Epsom Derby Festival in Surrey, southern England on June 3, 2017. (Photo by Anthony Devlin / AFP) (Photo credit should read ANTHONY DEVLIN/AFP/Getty Images)

Britain's Queen Elizabeth II (C) and the Queen's racing manager, John Warren (L) watch the racing on the second day of the Epsom Derby Festival in Surrey, southern England on June 3, 2017. (Photo by Anthony Devlin / AFP)        (Photo credit should read ANTHONY DEVLIN/AFP/Getty Images)

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Britain's Queen Elizabeth II (R) and the Queen's racing manager, John Warren watch the racing on the second day of the Epsom Derby Festival in Surrey, southern England on June 3, 2017. (Photo by Anthony Devlin / AFP) (Photo credit should read ANTHONY DEVLIN/AFP/Getty Images)

Britain's Queen Elizabeth II (R) and the Queen's racing manager, John Warren watch the racing on the second day of the Epsom Derby Festival in Surrey, southern England on June 3, 2017. (Photo by Anthony Devlin / AFP)        (Photo credit should read ANTHONY DEVLIN/AFP/Getty Images)

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EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II watches the racing as she attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)

EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II watches the racing as she attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)

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EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)

EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)

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EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)

EPSOM, UNITED KINGDOM - JUNE 03: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Queen Elizabeth II attends Derby Day during the Investec Derby Festival at Epsom Racecourse on June 3, 2017 in Epsom, England. (Photo by Max Mumby/Indigo/Getty Images)