At least one in 10 large UK businesses have had their computer systems broken into by cybercriminals looking to steal confidential information, according to a British government report.

About 13 per cent of large companies have detected unauthorised outsiders in their networks, a dramatic rise from just 1 per cent two years ago, according to the study by the Department for Business, Enterprise and Regulatory Reform, which will be published today at the Info-security Europe show in London.