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Expected next UK PM Burnham faces defence funding gap - Finance news and analysis from Global Banking & Finance Review
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Expected next UK PM Burnham faces defence funding gap

Published by Global Banking & Finance Review

Posted on July 1, 2026

3 min read

· Last updated: July 1, 2026

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UK's Starmer leaves successor-in-waiting Burnham with defence funding gap

Defence Funding Challenges for Incoming Prime Minister Andy Burnham

By Sarah Young

LONDON, July 1 (Reuters) - Andy Burnham will have to find an additional £4.7 billion ($6.2 billion) to close a defence funding gap, either through deeper spending cuts or higher taxes, when he takes over as British prime minister in a handover expected later this month.

Keir Starmer has said he will step down as prime minister once his Labour Party picks his successor, and no other candidates have challenged Burnham, a former mayor of Manchester elected to parliament last month.

Starmer's Final Defence Plan

As one of his final acts in office, Starmer announced a long-delayed defence plan on Tuesday aimed at making Britain's depleted armed forces war-ready amid rising security threats and warnings that Russia could attack a NATO member as soon as 2030.

However, the plan's commitment to spend an additional £15 billion came under scrutiny within hours of its release, after documents showed that a third of that funding still needed to be found in a budget later this year.

Difficult Choices for Burnham

DIFFICULT CHOICES

Burnham has not spoken publicly about the defence spending plan, although Dan Jarvis, the defence secretary in the outgoing cabinet, suggested the leader-in-waiting supported it.

"I absolutely have the assurance that, as prime minister, Andy Burnham will make sure that we've got the investment coming into defence that's good for our nation, good for our national security," Jarvis told reporters.

Shortfall and Efficiency Targets

Adding to the potential future headache for Burnham, the £15 billion in extra funding was well below the £28 billion military chiefs had said they needed over the next four years. The plan also relies on defence efficiencies of £10.7 billion being found by 2030.

Starmer defended it, calling it the biggest sustained increase in defence funding for 45 years, and saying it was usual for governments to expect some proportion of funding for long-term plans to come from future budgets.

Public Finances and Criticism

He also highlighted work by his government to stabilise the public finances, noting that the budget includes £22 billion of "headroom" that could be used for future needs. Economists have said that inflation and slowing economic growth will have reduced that figure markedly.

"The very reason for the headroom is to have the credibility to take decisions outside the budget and outside the spending review," he said.

Opposition and Military Response

The plan was also criticised by opposition politicians and former military chiefs for failing to set out when defence spending would reach 3% of GDP, on the way to meeting Britain's NATO commitment to spend 3.5% of GDP by 2035.

Starmer had already said that much of the £15 billion would come from reallocating spending from other government departments, drawing criticism from local politicians as funding was cut for road and energy projects.

"Defence spending will likely remain one of the biggest fiscal pressures facing the UK in the medium term," the Institute for Fiscal Studies think tank said, adding that reaching 3.5% in 2035 would require an additional £25 billion a year.

Financial Context

($1 = 0.7555 pounds)

(Reporting by Sarah YoungEditing by Elizabeth Piper, Mark Potter, Peter Graff)

Key Takeaways

  • The June 30 Defence Investment Plan commits £15 billion over four years but leaves £1.2 billion per year (≈£4.7 billion total) unfunded until the autumn Budget (ifs.org.uk)
  • Defence spending projected to reach only ~2.7% of GDP through 2029‑30—short of the 3.5% NATO target—requiring an additional ~£25 billion per year by 2035 (ifs.org.uk)
  • Burnham, expected to become PM by mid‑July, will face significant fiscal pressure early in his term to reconcile defence needs with infrastructure priorities and broader public services (theweek.com)

References

Frequently Asked Questions

How much is the UK defence funding gap?
The current UK defence funding gap is estimated at £4.7 billion, which must be addressed by the next prime minister through spending cuts, higher taxes, or reallocations.
What is Andy Burnham's position on the UK defence plan?
Andy Burnham's view on the current defence plan is not yet known, but he is expected to take national security seriously if elected prime minister.
How does the new defence plan impact other government spending?
The plan reallocates funds from other government departments, including cuts to road and energy projects, prompting criticism for affecting infrastructure investments.
What is the UK’s NATO defence spending commitment?
The UK has committed to spending 3% of its GDP on defence, aiming to reach 3.5% by 2035 in line with NATO requirements.
What are the future fiscal challenges for the UK regarding defence?
Reaching the NATO target will require an additional £25 billion per year by 2035, making defence spending one of the UK's biggest fiscal pressures.

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