As with previous years, this State of the Statistical System report reflects our views on the performance of the UK statistical system through exploring areas of progress, innovation and challenge. However, unlike previous years, this report is being published during a time of unprecedented scrutiny and challenge for the Office for National Statistics (ONS) and the UK Statistics Authority (the Authority).

Throughout the last year, significant concerns have been raised about the performance of both the ONS and the Authority, with their ability to effectively deliver core functions being called into question. These concerns are explored in both the Devereux Review and the two Public Administration and Constitutional Affairs Committee (PACAC) oral evidence sessions which were held shortly before the publication of this report in response to the inquiry on the work of the Authority.

Whilst PACAC has not yet published its report, it is our view that the concern of the Committee was clear and that there is a considerable challenge ahead for ONS to rebuild quality and confidence in its statistics.

Although there has been much focus on ONS over the last year, it is important to remember that our regulatory work covers the broader statistical system across the UK. This system remains robust and is working hard to meet diverse user needs. We see statisticians across the UK committed to maintaining quality, integrity and trustworthiness of their outputs, ensuring a resilient and effective statistical system, as reflected in this report.

Looking forward to the coming year, OSR will remain consistent in our role of ensuring the trustworthiness, quality and value of official statistical across the UK as these challenges are navigated.

Ed Humpherson

17 July 2025