Auditor general Sir Jon Bourn has qualified the accounts of the National Insurance Fund, which administers £61bn of government revenue.
According to The Daily Telegraph Bourn said he was ‘unable to determine whether proper accounting records had been maintained’ in 2003/2004.
The Department of Work and Pensions was blamed for the problem. Bourn said the department was ‘unable to provide all the evidence considered necessary’ to complete an audit of £6.7bn that was spent on ‘incapacity benefit’.
Bourn was able to approve the rest of the accounts.