At the end of each financial year (March 31st.) the Council has to have the accounts audited.
First the accounts, minutes and other records are submitted to an Internal Auditor (appointed by the Council) who examines them, the procedures followed, taxation submissions etc. and prepares a report for the Council.
Following that the Council has to prepare an annual governance statement and a statement of accounts. These, together with supporting documentation, are sent to the External Auditor (appointed nationally).