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.

Lord Hall, who started in the job four months ago, said further steps were needed to ensure the BBC was better run and more efficient.

The breakdown of the costs of the Pollard Review showed that the £2.1m costs (excluding tax and VAT) included £893,500 to lawyers Reed Smith and £492,436 for the BBC's "external legal support".

In addition, witnesses' legal costs totalled £391,120.