This paper sets out how we constructed a counterfactual to establish how much water customers in England and Wales could have benefited from an alternative charging system between 2010/11 and 2014/15.
This paper sets out how we used an analytical technique called multilevel regression modelling to investigate the factors affecting levels of attendance at accident and emergency (A&E) departments by patients registered at a GP practice.
This series of papers summarises the methodological approaches we have taken in carrying out innovative or novel analysis. Such analysis is conducted under our statutory authority to examine and report to Parliament on the economy, efficiency and effectiveness with which government departments and other bodies have used their resources.
The Audit insights papers are methodological summaries and do not make new observations about value for money.
Insights we have drawn from exploratory analysis of data used by the Environment Agency as part of its regulation of storm overflows.
This paper sets out how we used a modelling technique called ‘discrete event simulation’ to investigate a local maternity service.
This paper sets out how we created look-up files to map between different commissioning geographies. This enabled us, for example, to estimate overall health funding at an area-level despite the different geographical bases of the various commissioners. We provide links to these look-up files.
Treasury expects all departments to evaluate the ex post impacts and costs of all their interventions, including spending, taxation and regulation. This activity should provide valuable information on the cost-effectiveness of government interventions, for the purposes of accountability and to learn lessons to improve current and future policies.
Explore flood defence data by region or local authority with our interactive map tool.
Examining transport accessibility to key local services in England About this tool Local public transport provision influences how people can access the services they need, including healthcare, education, employment, leisure and business facilities. The Department for Transport (DfT) and other organisations have identified that investment in local transport supports economic growth, helps build sustainable communities […]
Inadequate forecasting is an entrenched problem for government departments, leading to poor value for money and increased costs for the taxpayer.
Last updated – 01 February 2021 About this tool Childhood obesity is a worsening problem which successive governments have attempted to address. The childhood obesity data visualisation is an exploratory tool. It should enable users to identify avenues for local exploration, including potentially similar local areas to explore over time. This interactive data visualisation supports the National Audit Office report on Childhood Obesity which was published in September 2020. The data we present […]
This privacy statement explains how the Comptroller and Auditor General (C&AG) and the National Audit Office (NAO) use and protect any data they hold about you. This statement also summarises your rights in relation to that data.
Data visualisation describing changes in English local authorities’ financial circumstances over the last decade.
This impacts case study shows how our review of the use of grants to provide funding was a major catalyst in Cabinet Office’s review of the appropriateness and efficiency of grant funding, and its plans to develop a digital mechanism for improving grant processing.
It is one example of financial or non-financial benefits realised in 2014 as a result of our involvement, all of which are set out in our interactive PDF.
HMRC has met its targets to raise more tax revenue in the short-term; however, an estimated £16 billion is lost to tax fraud each year. HMRC needs to improve the way it uses data and analysis to understand the effect of its actions to tackle fraud.
This report draws together our experience of the main challenges and barriers to better use of data across government.
The National Audit Office (NAO) has undertaken an efficiency review of the Food Standards Agency’s (FSA) delivery of meat hygiene official controls.
Hetan Shah becomes the NAO’s latest non-executive Board member, following approval of his appointment by the Public Accounts Commission.
Our interactive data visualisation lets you explore the changes in the pattern of apprenticeship starts and maps showing where apprenticeships are taking place.
HMRC has improved its approach to tackling error and fraud in tax credits but still lost £2.3 billion in 2010-11.