The UK Statistics Authority has ruled that Sir Keir Starmer, the Wales Office and the Ministry of Defence used misleading figures about UK defence spending. A £270bn figure was presented as an increase in spending when it is actually the total amount the government plans to spend on defence over the current Parliament. BBC News

Penny Young, the Authority's interim chair, wrote to Conservative shadow defence secretary James Cartlidge on 5 August 2026. The Office for Statistics Regulation, the Authority's regulatory arm, agreed that it is "incorrect and misleading to describe the £270 billion as an increase in defence spending over the course of this Parliament." OSR

The £270bn represents the total the government plans to spend on defence from 2025-26 to 2028-29. In March, Starmer told a committee of senior MPs that the government would spend "£270bn more on defence than we would otherwise have done," according to The Telegraph. The same figure was repeated in June by a Ministry of Defence spokesman. The Telegraph

On 3 June, the Wales Office posted on X: "The UK government is increasing defence spending by £270bn over this Parliament to strengthen our national security." That post has since been deleted. BBC Wales reported that the figure originated in the Ministry of Defence rather than the Wales Office.

The Wales Office told the UK Statistics Authority the £270bn figure "was a mistake and was amended as soon as it was noticed." The department, then led by Welsh Secretary Jo Stevens, reviewed its press office lines and quality checks to stop the mistake happening again. The Ministry of Defence separately took steps to ensure future communications use "precise and consistent language" when presenting defence spending figures.

Conservative shadow Wales secretary Mims Davies criticised Labour ministers and civil servants for presenting defence figures in a way that risks misleading the public. The Telegraph reported on 5 August that Starmer "misled MPs" over his defence spending claim, in line with the Authority's ruling.

The distinction at the heart of the ruling is between a total and an increase. Imagine you tell your family you will spend £270 on food this year. That is a total budget. If you then say you will spend £270 more than you would have done, that sounds like extra money on top of your usual shopping. The first statement describes a budget. The second suggests an addition to it. The OSR's finding turns on that difference.

For Starmer personally, the ruling matters because the misleading phrasing came not in a press release or a social media post but in evidence to a committee of MPs. Ministers who mislead Parliament, even by accident, are expected to correct the record at the earliest opportunity. The committee appearance in March was the first time the £270bn figure was expressed in the "more on defence than we would otherwise have done" wording that the OSR has now ruled misleading.

For the Wales Office, the consequences have been procedural: a deleted social media post, a review of press lines, and an admission of error to the statistics regulator. For the Ministry of Defence, which BBC Wales identified as the origin of the figure, the commitment to tighter language in future communications is the visible outcome.

The broader context here is the role the UK Statistics Authority has built for itself as a referee of political claims that use official numbers. The OSR does not police what ministers say in Parliament in the way the Commons Speaker or the Privileges Committee might. Its remit covers how statistics and numbers are presented in public. A letter from the interim chair to a shadow secretary of state, published on the regulator's website, is how it does that job. The ruling carries no penalty beyond the public record it creates.

Defence spending is reserved to Westminster, meaning decisions are made by the UK government rather than the devolved governments in Scotland, Wales and Northern Ireland. But the effects of those decisions spread across all four nations through defence contracts, military bases and the defence industry. The Wales Office's involvement in this episode shows that the political messaging around defence spending is not confined to the Ministry of Defence.