Bosses at computer giant Hewlett-Packard took a £5.5bn hit after accusing former staff at a Cambridge software company it bought last year of misleading investors.
HP bought Autonomy in a £7.1 billion deal that saw its founder Dr Mike Lynch pocket around £500 million.
The American firm alleges that former members of Autonomy's management fiddled accounts in a bid to "mislead investors and potential buyers" and has referred the matter to the Serious Fraud Office (SFO).
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