Hall: BBC report 'grim reading' in places
16 July 2013 Last updated at 12:46 BST
The BBC has spent almost £5m on three inquiries set up in the wake of the Jimmy Savile scandal.
The corporation's annual report revealed the Pollard Review, which looked into Newsnight's dropped investigation into Savile, cost £2.4m.
BBC Trust chairman Chris Patten said the organisation was determined to learn lessons from the past year.
Director general Tony Hall admitted the BBC was not the "steward of public money" it should have been.