Footage from Princess Diana's funeral features in the trailer for the Duke of Sussex's new mental health series.
The BBC has offered an unconditional apology after a report found a prominent journalist used "deceitful" methods to secure a landmark interview with Princess Diana as her marriage broke down.
BBC journalist Martin Bashir conducted the career-defining interview with Diana in 1995, in which she detailed her breakdown of her relationship with Prince Charles.
BBC Director-General Tim Davie said Thursday the interview "fell far short of what audiences have a right to expect."
"While the BBC cannot turn back the clock after a quarter of a century, we can make a full and unconditional apology. The BBC offers that today," Davie said.
The report, written by former judge Lord Dyson, found that Bashir had shown fake bank statements to Diana's brother Charles Spencer, which "deceived and induced him to arrange a meeting with Princess Diana."
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"By gaining access to Princess Diana in this way, Mr Bashir was able to persuade her to agree to give the interview," the report notes, adding that this behavior was in breach of BBC guidelines.
Bashir has long been alleged to have used forged documents that suggested the palace staff were working against Princess Diana and being paid to spy on her, CNN anchor and correspondent Max Foster has previously reported.
Matt Wiessler, a former graphic designer for the BBC, said he mocked up false bank statements after Bashir reached out to him.
Martin Bashir interviews Princess Diana in Kensington Palace for the BBC television program "Panorama" in 1995.
Thursday's report found that Bashir also likely created another set of fake bank statements, which he again showed to Spencer.
The 1995 interview was a seismic moment in British public life.
During the event, Diana told Bashir that there were "three of us" in her marriage to Charles, referring to Camilla Parker Bowles, whom the heir to the throne would later marry.
Buckingham Palace was blindsided by the interview and thrown into crisis by Diana's comments, which cast a rare light on the inner workings of the royal family.
The new report notes that Wiessler was worried that he "might have played a role in obtaining the interview by deception" and raised his concerns with the BBC shortly after the interview aired. The report says that Wiessler is not facing any criticism for accepting the commission, and describes him as "an entirely reputable graphic designer" who freelanced for the BBC.
The broadcaster launched an internal inquiry in 1996 and concluded that documents had been forged but didn't play a role in Diana's decision to participate in the interview.
Bashir initially claimed that he had not shown the documents to anyone but admitted otherwise in March 1996, Dyson found.
The report is critical of both Bashir's behavior and of the way the 1996 probe was carried out by the BBC.
It concludes that "without justification" the BBC "covered up... facts as it had been able to establish about how Mr Bashir secured the interview."
Dyson added that the BBC also "failed to mention the issue at all on any news programme and thereby fell short of the high standards of integrity and transparency which are its hallmark."
The BBC's former director-general Tony Hall, who was in charge of news and current affairs at the time of the controversy, said Thursday that he was "wrong to give Martin Bashir the benefit of the doubt," according to PA Media news agency
Last week Bashir stepped down from his role as the BBC's religion editor, citing health reasons.
On May 14, Jonathan Munro, the BBC's Deputy Director of News, sent an email to staff confirming that Bashir would leave the corporation.
"He let us know of his decision last month, just before being readmitted to hospital for another surgical procedure on his heart," the email read. "Although he underwent major surgery toward the end of last year, he is facing some ongoing issues and has decided to focus on his health. We wish him a complete and speedy recovery."
The report comes at highly volatile moment for the corporation, which is a giant of public broadcasting but increasingly under pressure from politicians.
Its publicly funded model faces growing scrutiny from the government, including from UK Prime Minister Boris Johnson.
The BBC's investigative current affairs show Panorama — the same program which featured the 1995 interview — will air a documentary on the controversy on Thursday at 7 p.m. (2 p.m. ET).
The program will examine the inside story of how Bashir obtained the interview, and how the BBC responded when it discovered he had faked bank statements and shown them to Earl Spencer.
Photos: Remembering Princess Diana, 1961-1997
Diana Spencer is shown in an undated family album photo at Park House, Sandringham, Norfolk, when she was a toddler. (AP Photo/HO)
Family album picture of Lady Diana Spencer in her baby carriage at Park House, Sandringham, Norfolk in 1962. (AP Photo/ho)
Family album picture of Lady Diana Spencer in Cadogan Place Gardens, London, during summer of 1968. (AP Photo)
Family album picture of Lady Diana Spencer with Souffle, a Shetland pony, at her mother's home in Scotland during the summer of 1974. (AP Photo/ho)
Lady Diana Spencer, near her flat in the Earls Court district of London, around November 1980. (AP Photo)
Lady Diana in an unknown location in 1981. (AP Photo)
Prince Charles and his bride-to-be, Lady Diana Spencer, driving down the course in an open carriage before Royal Ascot in England meeting on June 19, 1981. (AP Photo/Press Association)
The casually clad Prince Charles of Wales and his fiancée Lady Diana Spencer, relaxing on a fence at Balmoral on May 6, 1981, during their Scottish holiday. (AP Photo/Press Association)
Prince Charles and Lady Diana Spencer leave St Paul’s Cathedral followed by Prince Andrew after a rehearsal of their wedding ceremony in London on July 27, 1981. (AP Photo)
Lady Diana Spencer in her wedding gown on the steps of St. Paul's Cathedral in London on her way to the wedding ceremony. Person at left is unidentified. (AP Photo/BIPNA, Pool)
Prince Charles and Lady Diana Spencer are shown on their wedding day at St. Paul's Cathedral in London on July 29, 1981. (AP Photo)
With a 25-foot (7.6 meter) sweeping train, The Princess of Wales, former Lady Diana Spencer, leaves St. Paul's Cathedral arm in arm with Prince Charles at the end of their wedding ceremony in London, July 29, 1981. (AP Photo)
Prince Charles and Lady Diana Spencer are shown on their wedding day at St. Paul's Cathedral in London on July 29, 1981. (AP Photo)
Britain's Prince Charles kisses his bride, the former Diana Spencer, on the balcony of Buckingham Palace in London after their wedding on July 29, 1981 (AP Photo)
The carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London on July 29, 1981. (AP Photo)
Prince Charles and his bride Diana, Princess of Wales, pose in the Throne Room of Buckingham Palace for this picture made after their wedding at St. Paul's Cathedral today. Back row, left to right: Edward van Cutsem, Lord Nicholas Windsor, Sarah Jane Gaselee, Prince Edward, Prince Charles, The Princess of Wales, Prince Andrew and Lady Sarah Armstrong-Jones. Front row, left to right: Catherine Cameron, seated, India Hicks, standing, and Clementine Hambro, seated. (AP Photo, BIPNA, Pool)
The carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London on July 29, 1981. (AP Photo)
Prince Charles and his bride Diana, Princess of Wales, wave from the balcony of Buckingham Palace after their marriage July 29, 1981, at St. Paul's Cathedral. (AP Photo)
Lady Diana Spencer waves to crowds of well-wishers from a horse-drawn carriage en route to St. Paul's Cathedral, London, where she will marry Britain's Prince Charles, heir to the throne, July 29, 1981. (AP Photo/Pool)
Britain's Prince Charles, Prince of Wales, with his wife Princess Diana, holds his newborn son Prince William as they leave St. Mary's Hospital, Paddington, London, June 22, 1982. (AP Photo/Staff/Redman)
Britain's Prince William, the 6-month old son of British Prince Charles and Princess Diana, the Prince and Princess of Wales with his parents during a special picture call at Kensington Palace in London, England on Dec. 22, 1982. (AP Photo/David Caulkin)
This is a 1984 photo of Princess Diana with sons Prince William, foreground, and Prince Harry. (AP Photo)
Princess Diana stoops down to accept flowers from children seated on a log as the royal couple visited Macedon, Australia, Saturday, Nov. 2, 1985. (AP Photo/Jim Bourdier)
Princess Diana, the Princess of Wales, arrives at a charity fashion show wearing a silver dress designed by Bruce Oldfield, in London, in 1985. The charity affair was expected to raise £70,000 ($82,600) for the Dr. Barnado Homes, that take care of orphan children. (AP Photo)
Princess Diana, the Princess of Wales sits cross-legged in a Bedouin tent in the desert about 60-miles from Riyadh, Saudi Arabia on Nov. 18, 1986, and talks with Prince Saod Faisel, son of King Faisal. (AP Photo/John Redman)
The Princess of Wales is pictured during an evening reception given by the West German President Richard von Weizsacker in honour of the British Royal guests in the Godesberg Redoute in Bonn, Germany on Monday, Nov. 2, 1987. Prince Charles and Princes Diana are touring Germany presently in an official state visit. (AP Photo/Herman Knippertz)
Britain's Princess Diana, the Princess of Wales, hugs and plays with an HIV positive baby in Faban Hostel, San Paulo, on April 24, 1991, on the second day of her visit to Brazil. (AP Photo/Caulkin)
Britain's Queen Elizabeth, the Queen Mother, right, talks with Diana, Princess of Wales, at the Royal Ascot horse race meeting near London, England, in this undated photo. (AP Photo)
FILE - In this July 30, 1992 file photo, Britain's Princess Diana, the Princess of Wales, right, meets actor Tom Cruise and his co-star wife actress Nicole Kidman at the Charity Premiere of the film Far and Away in London's West End. (AP Photo/Martin Cleaver, File)
FILE - Princess Diana smiles in the reception line as she greets guests at a fund raiser for breast cancer research at the National Building Museum Tuesday night, Sept. 24, 1996 in Washington. From left are Princess Diana, Washington Post owner Katherine Graham, Vogue Magazine Editor-in-Chief Anna Wintour, designer Ralph Lauren and Georgetown University President Rev. Leo J. O'Donovan. (AP Photo/J. Scott Applewhite, File)
Princess Diana watches the Indiana Jones Stunt Spectacular at MGM Studios in Lake Buena Vista, Florida on August 25, 1993. Diana, Prince Harry, and Prince William are spending a few days of private vacation at Walt Disney World. (AP Photo/Peter Cosgrove)
Mother Teresa, left, says goodbye to Princess Diana after receiving a visit from her Wednesday, June 18, 1997, in New York. Princess Diana met privately for 40 minutes with Mother Teresa at The Missionaries of Charity in the South Bronx section of New York. (AP Photo/Bebeto Matthews)
First lady Hillary Rodham Clinton, left, meets with Princess Diana at the White House Wednesday, June 18, 1997. On Tuesday night the princess attended an American Red Cross fund-raiser in Washington to aid land-mine victims around the world. (AP Photo/White House)
File Photo: From Aug. 9, 1997, Diana, Princess of Wales, poses for photos with two boy land mine victims in Bosnia, in the village of Klokotnica, 60 kms northwest of Tuzla. Both boys had lost legs after stepping on landmines. (AP Photo/Amel Emric)
File Photo: Princess Diana, center, with Mirzeta Gabelic, a 15-year-old landmine victim, in front of Mirzeta's home in Sarajevo, Sunday Aug. 10, 1997. Lady Diana arrived in three days private visit to Bosnia-Herzegovina to focus world attention on the continuing plague of land mines and to call for complete ban on the production, sale and use of land mines. (AP Photo/Hidajet Delic)
FILE - In this Jan. 4, 1993 file photo, Princess Diana and sons Harry and William at Banana Bay Beach, St. Kitts. Harry and William said on Sunday, Jan. 29, 2017, that they plan to build a statue to mark the 20th anniversary of Diana's death in a Paris car crash in 1997. (AP Photo/Richard Drew, File)
FILE - In this Monday, March 17, 1997 file photo, South African President Nelson Mandela, left, shows the way to Princess Diana, during a meeting in Cape Town. (AP Photo/Sasa Kralj, File)
FILE - In this Thursday July 17, 1997 file photo, Britain's Princess Diana rides a personal watercraft with her son Prince Harry, steering, in Saint Tropez, on the French Riviera, where she is spending a few days holidaying. (AP Photo/Lionel Cironneau, File)
FILE - Britain's Diana, Princess of Wales walks on the quay of the residence of Mohamed Al Fayed, in Saint Tropez, French Riviera, Sunday July 20, 1997. It has been nearly 25 years since Princess Diana died in a high-speed car crash in Paris. (AP Photo/Lionel Cironneau, File)
FILE -- In this Aug. 22, 1997 file photo, Diana, Princess of Wales, and her companion Dodi Fayed, walk on a pontoon in the French Riviera resort of St Tropez. (AP Photo/Patrick Bar-Nice Matin, file)

