UK royal officials banned ethnic minorities from clerical roles until at least the 1960s, The Guardian report reveals.
William and Harry will meet for a ceremony in central London after months of friction caused by royal family rows.
British Princes William and Harry are meeting to unveil a statue to their late mother Princess Diana on what would have been her 60th birthday.
The statue in honour of Diana, who was killed in a Paris car crash in 1997, will be revealed on Thursday in the Sunken Garden of Kensington Palace in central London, her former home.
It will be the second memorial to Diana in London, after a 210-metre (689-foot) long fountain was unveiled in Hyde Park in 2004 after years of bureaucratic wrangling and squabbling over the design.
The buildup to the event has been the subject of intense media focus, with the brothers said to have barely spoken to each other in recent months after a public falling out.
“I think it’s going be very awkward,” royal commentator Penny Junor told Reuters.
“They will put on a show because the cameras will be there, but neither of them is very good at hiding their emotions.”
William was 15 and Harry 12 when the limousine carrying their mother and her partner Dodi al-Fayed crashed in a tunnel in Paris as it sped away from chasing photographers.
Diana became a household name around the world after her marriage to heir to the throne Prince Charles in 1981.
The subsequent collapse of their relationship was played out in the full glare of the media spotlight, further captivating the public.
Almost a quarter of a century since the fatal crash, her life and death are still a regular feature in British newspapers.
The brothers last saw each other in April at the funeral of their grandfather Prince Philip, the queen’s husband of more than 70 years [Alastair Grant/Pool via Reuters]
In 2017, they commissioned the statue to mark her legacy and life, eventually selecting sculptor Ian Rank-Broadley, whose effigy of Queen Elizabeth II has been used on British and Commonwealth coinage, as its designer.
It will be unveiled at a small event attended by a select group of attendees, including the princes and Diana’s close family at Kensington Palace, where William, 39, now lives with his family.
Harry, 36, also used to live at the palace, but his home is now in California after he and his American wife Meghan Markle stepped down from official royal duties last year.
He has since openly criticised royal institutions.
In an interview with chat show host Oprah Winfrey, he and Meghan accused an unnamed royal family member of racism, a claim media reports say infuriated his brother.
The brothers last saw each other in April at the funeral of their grandfather Prince Philip, the queen’s husband of more than 70 years.
Thursday’s event will be their second public meeting since Harry and Meghan stepped away from royal duties.
Finding some sort of rapprochement between the princes is crucial to the monarchy as Britain’s royal family seeks to appeal to a younger generation and a more diverse population.
William and Harry – and, it has been reported, Meghan – are expected to meet again in June next year for celebrations of their grandmother’s 70 years as queen.