It has been discovered that cost cutting at the Inland Revenue played a huge part in the UK's biggest data security breach. 25 million people across the UK are at risk of serious fraud because disks containing the personal details of every parent and child who receive Child Benefit were lost in transit to the National Audit Office. The NAO has said that it did not request the recipients' bank details but only names and national insurance numbers to check for fraud. A senior manager is believed to have said it was too 'burdensome' to separate the highly personal data so every bit of information was transferred onto the disks. A junior official has resigned. The breach has put in doubt the government's ability to protect the confidential data it holds on British citizens.