 This appointment was revoked in 2007 following the controversy around his travel expenditure.On 25 October 2007 his office announced his retirement in 2008 after 20 years as Comptroller and Auditor General and head of the National Audit Office.Bourn served as a board member of the Financial Reporting Council and as Chair of the Professional Oversight Board of the Council and its predecessor body, the Review Board of the Accountancy Foundation 2000-2008.