Britain watchdog confronts treasury over chaotic budget leaks

In UK News by Newsroom02-12-2025

Britain watchdog confronts treasury over chaotic budget leaks

Credit: Ben Birchall/PA

Britain’s fiscal watchdog confronted Treasury over chaotic leaks and briefings ahead of Rachel Reeves’ Budget, raising concerns about process transparency.

Officials at the Office of Budget Responsibility (OBR) told the Treasury committee on Tuesday that leaks regarding the fiscal statement - which included recommendations over mansion tax, income tax, ISAs and pensions, as well as briefings about the status of the public finances - were “unhelpful”.

Budget responsibility committee member Professor David Miles faced questions by MPs a day after the watchdog’s boss Richard Hughes quit after an adverse investigation into how the OBR’s evaluation of the chancellor’s strategies was accidentally released online before she had given her speech last Wednesday.

However, it also coincided with Ms. Reeves was questioned about claims that she had misled the nation and the markets prior to the Budget by neglecting to reveal that the OBR had informed her that she had a £4 billion surplus rather than a £20 billion deficit.

The briefings by Ms Reeves and other officials were a key cause of concern for the OBR, Professor Miles told MPs.

“I don’t think there was any formal complaint. We were obviously aware that information seemed to be getting into the press,”

he told the committee.

“There was lots of information appearing in the press which wouldn’t normally be out there and this wasn’t, from our point of view, particularly helpful.”

Asked if the OBR raised it with the Treasury, he said:

“I think it was clear that we didn’t find this helpful. We made that clear.”

Former Bank of England chief economist Andy Haldane has also previously cautioned that the briefings and U-turns on subjects like income tax were “the single biggest reason why [economic] growth has flatlined”.

Speaking on Tuesday, Prof Miles also emphasized that the OBR is not at loggerheads with the government but confessed that he hoped for a “smoother” approach next year.

Two days after the Budget, the OBR submitted a note to the Treasury committee stating the outlook for the economy was brighter than Ms Reeves had predicted. The chancellor and the prime minister also failed to back the watchdog over the Budget paper mishap, with Sir Keir Starmer branding it as a “serious error” and a “massive discourtesy” to parliament, hours before Mr Hughes departed.

In another flashpoint, ministers are reported to be frustrated that the watchdog did not undertake its review of productivity forecasts earlier, while the Conservatives were still in charge, leaving Labour to deal with the hit to expected tax revenues.

Prof Miles said:

“I wouldn’t say we were at war with the Treasury. I mean, we have a very close relationship with the Treasury. In fact, we rely not just on the Treasury but other departments in government for analysis of many sorts of measures.”

He added:

“There are lots of very good – from my point of view – economic analysts in the Treasury and we rely heavily upon them.
I hope we can run a process in the future – and we’ll do everything we can – that is somewhat smoother than the process we’ve just been through.”

According to Prof. Miles, the letter was meant to dispel "misconceptions" in the media that the OBR was either serving as the government's "patsy" or that its predictions had been "all over the shop."

Speculation that Ms. Reeves might violate Labour's election pledge not to raise income tax rates was stoked by her repeated warnings in the run-up to the Budget that the OBR's lowering of productivity would have an effect on the public finances.

In an extraordinary speech on November 4, the chancellor seemed to make the case for income tax rises that would go against the manifesto, claiming that the public finances will be impacted by the OBR's downgrading of productivity.

The chancellor in part blamed the £26bn of tax rises in the Budget on the downgrading, which inflicted a £16bn cut to tax collections.

However, it has subsequently come to light that by the time the speech was delivered, the OBR was predicting that she would stick to her policies of using taxes rather than borrowing to finance daily expenditures by a "very small" margin of £4.2 billion, partly because of the tax effects of rising wages and inflation.

Andy Haldane, a former senior economist at the Bank of England, has also cautioned that the U-turns and briefings on matters such as income tax are "the single biggest reason why [economic] growth has flatlined."

Additionally, Prof. Miles stated that the OBR and the government are "not at war," but he acknowledged that he hoped for a "smoother" procedure the next year.

In the run-up to the Budget, Ms Reeves had frequently warned that the OBR’s lowering of productivity would have an impact on the public finances.

During an extraordinary address on November 4, the chancellor appeared to outline the pitch for manifesto-busting rises in income tax, saying the OBR’s downgrade of productivity would have an impact on the public finances.

The chancellor in part blamed the £26 billion of tax rises in the Budget on the downgrade, which brought a £16 billion cut to tax collections.

However, it has subsequently come to light that by the time the speech was delivered, the OBR was predicting that she would stick to her policies of using taxes rather than borrowing to finance daily expenditures by a "very small" margin of £4.2 billion, partly because of the tax effects of rising wages and inflation.

He said:

“My interpretation was, and others might interpret differently, that the chancellor was saying that this was a very difficult Budget and very difficult choices needed to be made.
And I don’t think that that was in itself inconsistent with the final pre-measures assessment we’d made, which, although it showed a very small positive amount of so-called headroom, it was wafer-thin.”

On 10 November, Ms Reeves told the BBC that keeping to the manifesto vow not to increase income tax rates would only be achievable with “deep cuts” to public spending.

But by the end of the week, the proposal to boost income tax had been withdrawn, with Treasury sources claiming an improvement in the OBR estimates, in a spectacular U-turn which added to the confusion in the run-up to the Budget, even though there had been no change.

Prof Miles said:

It’s certainly true that there wasn’t any immediately good bit of news in that particular window.”

Giving his personal view, he added:

“I don’t think it was misleading for the chancellor to say that the fiscal position was very challenging at the beginning of that week.
Whether a message was then put out to say ‘well, it’s less challenging by the end of the week’, I don’t know, and I don’t know where that message would have come from.
It certainly didn’t reflect anything that was news from the OBR being fed into the government.”

The Organization for Economic Cooperation and Development (OECD) has cautioned that following Ms. Reeves' Budget, forecasts for economic growth are lower and unemployment is likely to rise. This is the day of the evidence session.

What immediate actions did the Treasury take after the leak?

Launching a disquisition in confluence with the National Cyber Security Centre to conduct a forensic examination of publication processes for financial reports, icing no hostile cyber exertion was involved but relating significant procedural failures. 

The Chief Secretary to the Treasury, James Murray, addressed the Commons to admit the soberness of the breach and promised a critical corrective way to catch how sensitive Budget information is published. 

The Office for Budget Responsibility( OBR) leadership was held responsible, climaxing in the abdication of OBR president Richard Hughes, who issued a profound reason and committed to comprehensive publication changes. Plans were outlined to conceivably move OBR report publishing to a more secure government subdomain or transfer responsibility to the Treasury to help unborn leaks.