The BBC fell short of "high standards of integrity and transparency" over Martin Bashir's 1995 interview with Princess Diana, an inquiry has found.
Mr Bashir acted in a "deceitful" way and faked documents to obtain the interview, the inquiry said.
And the BBC's own internal probe in 1996 into what happened was "woefully ineffective", it added.
The BBC and Mr Bashir have both apologised.
The BBC said the report showed "clear failings", admitting it should have made more effort to get to the bottom of what happened at the time.
The corporation has sent personal apologies to the Prince of Wales, the Dukes of Cambridge and Sussex, and Diana's brother Earl Spencer.
Mr Bashir said mocking up the documents "was a stupid thing to do" and he regretted it, but said they had no bearing on Diana's decision to be interviewed.
https://www.bbc.co.uk/news/uk-57189371
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This will be the tip of the ice berg