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Expected next UK PM Burnham faces defence funding gap

Published by Global Banking & Finance Review

Posted on July 1, 2026

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· Last updated: July 1, 2026

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Burnham Faces Major Defence Funding Challenge as Next UK Prime Minister

UK Defence Funding Gap and Political Response

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, if, as expected, he becomes British prime minister later this month.

Starmer's Defence Plan and Immediate Reactions

Prime Minister Keir Starmer on Tuesday announced a long-delayed defence plan 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 accompanying documents showed that a third of the funding still needed to be found in a budget later this year.

Government's Approach to Defence Funding

"It's not unusual for governments to make announcements saying this is what we'll spend, and then to complete the details of that at the next budget," Luke Pollard, minister of defence procurement, told Sky News on Wednesday.

Political and Fiscal Challenges Ahead

Uncertainty Over Burnham's Position

DIFFICULT CHOICES

Burnham is widely expected to become Britain's prime minister later in July. His view of Starmer's defence plan is not yet known.

"I know that if Andy Burnham becomes the prime minister ... that he will take national security as seriously as Keir has taken it," Pollard said.

Criticism from Opposition and Military Leaders

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's Defence of the Plan

Starmer defended the costings on Tuesday, saying much of the additional funding would come from reallocating spending from other government departments.

The plans have also drawn criticism for cutting funding earmarked for road and energy projects, a sensitive issue for a government elected in 2024 on promises of long-term investment in infrastructure.

Think Tank Analysis and Future Outlook

The Institute for Fiscal Studies, a think tank, said the £1.2 billion per year needed to fund the current plan meant the next prime minister would quickly face difficult choices.

"There will be further impacts on other areas of spending, tax or borrowing on top of those set out in today's announcements – implying one key early decision for the next prime minister," the IFS said.

"Defence spending will likely remain one of the biggest fiscal pressures facing the UK in the medium term," it added, saying that reaching 3.5% in 2035 would require an additional £25 billion a year.

Currency Note and Reporting Credits

($1 = 0.7555 pounds)

(Reporting by Sarah Young. Editing by Elizabeth Piper and Mark Potter)

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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