Andersen was called in last week on the heels of the arrest in Hong Kong of BBC Worldwide director of global marketing Jeff Taylor, a member of the board of BBC Worldwide. He was arrested after a series of commission payments were made to a children's toy broker in the region.
Commission of around £650,000 was paid to EMS, which acts as an intermediary between toy manufacturers and retailers for toys depicting characters from the BBC's hit children's TV programme Tweenies.
Earlier this year, Rupert Gavin, BBC Worldwide's chief executive, is said to have received a letter warning him of possible problems in Hong Kong. The letter is understood to have been passed to a Worldwide executive, Mark Johnstone, who reports to Taylor, although it is not clear if Johnstone raised the issue with Taylor.
Dame Pauline Neville-Jones, chairwoman of the audit committee of the BBC board of governors, insisted that an external accountant investigate the matter, a move that was approved by director general Greg Dyke.
Taylor has not been charged but is in Hong Kong helping the territory's Independent Commission Against Corruption with its inquiries. He has been suspended from the corporation.
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