The Pollard review into the decision to drop a BBC Newsnight investigation into alleged sexual abuse by Jimmy Savile, is asking BBC staff for documents and is electronically searching archived documents from certain people.
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The Late Late Show host also allowed the singer to take the wheel in a Carpool Karaoke first.
The lender, which is the worst affected by the PPI mis-selling scandal, said it has also set aside £150m for other conduct issues.
Vodafone has been fined £4.6 million by the industry regulator for "serious and sustained" breaches of consumer protection rules.