The Pollard review into the cancelled Newsnight investigation about Jimmy Savile is due to report at noon today.
The fiasco cost former Newsnight editor Peter Rippon his job. He pulled the airing of the report as he did not believe it was credible enough to broadcast, but it is unclear why he stopped BBC journalists from investigating further.
Pollard's review is one of two internal reports at the BBC for journalistic failings on the flagship programme.
A second report, being conducted by BBC Scotland director Ken MacQuarrie, is looking into the circumstances behind a separate story which wrongly implicated former Conservative party treasurer Lord McAlpine in a North Wales paedophile ring.
The BBC ran a series of tribute programs to Savile after his death last year, which has led to speculation of a cover-up.
Meanwhile police carrying out Operation Yewtree, the investigation into the Jimmy Savile sex abuse scandal, have confirmed that they have arrested a man from London in his 70s.