The long-running investigation into collapsed car giant MG Rover has so far cost £12.2m.

The inquiry hit the figure in April, and includes £437,000 in disbursements.

The Department of Business refused to reveal how much of the disbursements related to expenses and other costs for the investigation team, led by Guy Newey QC and BDO Stoy Hayward's Gervase MacGregor.

'My real concern now is not just that it is taking so long – but that there is an absolute silence on why it is taking so long,' said Labour MP Richard Burden.

An official for the department said the investigation was being concluded as quickly and thoroughly as possible.

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