National Audit Office (UK)

National Audit Office (UK)
Agency name	National Audit Office (UK)
Formed	1983
Preceding1	Comptroller and Auditor General
Jurisdiction	United Kingdom
Headquarters	1-4, Horse Guards Road, Whitehall
Employees	~800
Chief1 name	Gareth Davies
Chief1 position	Comptroller and Auditor General
Parent agency	Parliament of the United Kingdom

National Audit Office (UK) The National Audit Office (UK) is the independent public institution charged with auditing public sector accounts and reporting on value for money for Her Majesty's Treasury, Cabinet Office, Ministry of Defence, Department of Health and Social Care and other central departments. It produces evidence-based reports for the House of Commons and supports select committees such as the Public Accounts Committee and the Committee of Public Accounts in scrutinising expenditure, delivering assurance to Parliament and informing accountability for public funds.

History

The origins of modern public audit in the United Kingdom trace to the office of the Comptroller and Auditor General and precedents including the Exchequer and the Comptroller of the Navy. Landmark developments include the Exchequer and Audit Departments Act 1866, reforms following the Public Accounts Committee establishment in the nineteenth century, and major restructuring in the Wright Committee era that influenced the creation of the modern institution in 1983. Subsequent milestones involved engagements with international bodies such as the International Organisation of Supreme Audit Institutions and involvement in audit standard-setting alongside the International Federation of Accountants and International Auditing and Assurance Standards Board.

Roles and Responsibilities

The institution is responsible for statutory financial audit of accounts presented by central government departments and a programme of performance audits covering public expenditure, procurement and delivery of services. Its remit intersects with statutory frameworks including the National Audit Act 1983 and scrutiny mechanisms of the House of Commons, providing Comptroller and Auditor General certifications, investigative reports to the Public Accounts Committee, and evidence used by the National Audit Office (UK) Board and other oversight bodies. It engages with external stakeholders such as the Office for Budget Responsibility, National Audit Office staff associations, and professional bodies like the Institute of Chartered Accountants in England and Wales.

Organisation and Leadership

Leadership is vested in the Comptroller and Auditor General, appointed under statute and accountable to the House of Commons. The office comprises directorates covering financial audit, performance audit, methodology, and corporate services, with senior managers drawn from experience in organisations such as the Institute for Government, Chartered Institute of Public Finance and Accountancy, and Big Four practice. Governance includes an independent board, audit committee and external auditors; the body liaises with parliamentary officials in the House of Commons Commission and operational partners in Her Majesty's Treasury and other departments.

Audit Functions and Methodology

Audit activities include statutory audit of resource accounts, value-for-money studies, and investigations into procurement, contract management and programme delivery. Methodologies blend financial audit standards from the Financial Reporting Council with performance audit techniques used by international peers such as the Government Accountability Office and the Australian National Audit Office. Techniques involve risk assessment, materiality thresholds, forensic accounting, sampling, and impact evaluation; outputs follow quality assurance regimes aligned with guidance from the International Organisation of Supreme Audit Institutions and professional regulators like the Audit Commission’s historical legacy.

Reports and Impact

Reports range from certificates of accounts to comprehensive value-for-money reports that have influenced policy and administrative change across departments such as the Department for Education, Home Office, Ministry of Defence, and the Department for Work and Pensions. High-profile publications have triggered parliamentary inquiries, influenced procurement reform, and led to departmental apologies or restructuring; such reports are frequently cited by the Public Accounts Committee, media outlets including BBC News, The Guardian, and think tanks such as the Institute for Fiscal Studies and the Resolution Foundation. Internationally, its methodologies have been referenced by auditors in the European Court of Auditors and in bilateral programmes with the Commonwealth Secretariat.

Relationship with Parliament and Government

The institution serves Parliament by providing independent assurance to the House of Commons and its select committees, principally supporting the Public Accounts Committee in questioning accounting officers and permanent secretaries from departments such as the Foreign, Commonwealth and Development Office and Department for Transport. Although operationally independent from Her Majesty's Treasury, it engages in formal liaison through memoranda of understanding, and it informs budgetary scrutiny alongside organisations like the Office for Budget Responsibility and the National Audit Office Finance Board.

Controversies and Criticisms

Criticisms have included debates over perceived institutional independence when engaging with Her Majesty's Treasury and ministers, disputes about the scope of performance audits in sensitive policy areas such as Health and Social Care Act 2012 implementation, and challenges concerning timeliness and resourcing during major programmes like the NHS IT programme and Ministry of Defence procurement projects. Academic commentators from institutions including the London School of Economics and watchdogs such as Transparency International UK have at times questioned methodology transparency and follow-up enforcement, while select committees and departments have contested interpretations in specific reports leading to public disputes and parliamentary exchanges.

Category:Public audit Category:Non-ministerial departments of the United Kingdom