Britain's Prince Andrew attends ceremonies marking the 75th anniversary of the liberation of Belgium from German occupation in Brugge, Belgium, September 7, 2019.

Britain's Prince Andrew reviews Chelsea Pensioners during the Founder's Day Parade at the Royal Hospital Chelsea in London, Britain June 4, 2015.

Prince William takes part in the King's Cup Regatta in Cowes, the Isle of Wight, Britain August 8, 2019. Andrew Matthews/Pool via REUTERS

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 22, 2017 Britain's Queen Elizabeth and Prince Andrew during Ladies Day at Ascot.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 20, 2019 Britain's Prince Andrew arrives by horse and carriage on ladies day.

Golf - British Open - Britian's Prince Andrew watches during the third round - Royal Troon, Scotland, Britain - 16/07/2016.

Ivanka Trump, daughter of U.S. President Donald Trump, and Britain's Prince Andrew, Duke of York are seen at Buckingham palace in London, Britain June 3, 2019. Tolga Akmen/Pool via REUTERS

Britain's Prince Andrew and Prime Minister, Boris Johnson, attend the Royal British Legion Festival of Remembrance at the Royal Albert Hall in London, Britain November 9, 2019. Chris Jackson/Pool via REUTERS.

Britain's Prince Andrew (C) attends the annual Order of the Garter Service at St George's Chapel at Windsor Castle in Windsor, Britain June 15, 2015.

Britain's Prince Andrew gestures as he delivers an opening speech at a seminar on Japan-UK security cooperation in Tokyo September 30, 2013.

Britain's Prince Andrew salutes the marching Armed Forces as he attends the Armed Forces Day in Guildford, southeast England, June 27, 2015.

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 23, 2017 Prince Andrew.

Britain's Prince Andrew leaves after attending the Easter Sunday service at St Georges Chapel at Windsor Castle in southern England April 5, 2015.

Britain's Prince Andrew, who was accompanying Queen Elizabeth, visits The Honourable Society of Lincoln’s Inn to open the new Ashworth Centre, and re-open the recently renovated Great Hall, in London, Britain, December 13, 2018.