Last weekend the thieves used scaffolding on a neighbouring building to enter the commission on the third floor. They removed computer chips from PCs and took other hardware from offices on the third to the fifth floors. The commission has alarms only on the first two floors.
'The Audit Commission takes security very seriously and follows the recommendations it makes to the bodies it audits,' said a spokeswoman. 'Due to unusual circumstances this security was breached, and procedures are being reviewed as a matter of urgency to make sure such a breach does not occur again.'