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).
More top news
Dry and fine overnight, but not as cold as last night
The Queen Elizabeth Hospital in King's Lynn is already in special measures and today directors agreed steps to address a shortfall in staff
Police are appealing for information after 8 sheep were killed and two others had to be put to sleep.