UK defence plan delays spark credibility warning

Delays in publishing the UK government’s Defence Investment Plan have raised serious concerns about the country’s military readiness and international credibility, according to a parliamentary watchdog report.

The Defence Investment Plan, which sets out how defence spending will be allocated over the coming decade, was originally expected in the autumn but is now scheduled for release ahead of a NATO summit next month. Lawmakers say the delay is creating uncertainty at a critical time for military planning.

The Public Accounts Committee (PAC) said the postponement is damaging confidence among allies and could increase long-term costs for military procurement. It warned that delayed decisions on equipment purchases are already making defence projects more expensive due to rising global prices.

The committee’s chair, Sir Geoffrey Clifton-Brown MP, said the UK has effectively gone years without a fully credible long-term defence capability plan. He argued that repeated delays cannot be justified by claims of “getting the details right,” and said the situation risks weakening both deterrence and trust.

The report also said the lack of a clear plan is affecting relationships with defence suppliers, who are adjusting prices in response to global instability. This, it said, could further strain an already pressured defence budget.

The Ministry of Defence responded by saying the government is working to fix what it described as an “outdated, overcommitted and underfunded programme” inherited from previous administrations. Officials said more than 1,400 major defence contracts have been signed since July 2024.

Defence Secretary John Healey told Parliament that Prime Minister Keir Starmer is committed to publishing the plan as soon as possible, emphasizing its importance for modernising the armed forces.

The Defence Investment Plan follows the Strategic Defence Review published in June 2025 and is intended to guide spending on equipment, infrastructure, and personnel to ensure the armed forces are prepared for future conflicts.

The PAC report also highlighted specific concerns about existing military equipment programmes, including the troubled Ajax armoured vehicle project. Soldiers reported health issues linked to noise and vibration problems, prompting temporary operational pauses.

According to the committee, at least 33 soldiers have been affected, with some still under medical review. It said the current requirement for frequent maintenance checks during operations is unrealistic in combat conditions.

The report added that upgrades to the Ajax system are still being developed, with costs yet to be confirmed, raising further uncertainty about the programme’s future readiness.

The committee also raised concerns about transparency in nuclear spending. It said a significant portion of the defence budget is being directed toward the UK’s nuclear deterrent, with costs expected to rise in the coming years.

The UK is currently building new Dreadnought-class submarines to maintain its nuclear deterrent, but lawmakers said there is insufficient clarity over long-term costs and performance reporting.

The Ministry of Defence said protecting and modernising submarine capability remains a top priority and that steps are being taken to ensure long-term resilience of the fleet.

The PAC made several recommendations, including clearer timelines for equipment readiness, improved transparency on nuclear spending, and better communication with defence suppliers affected by the delay.

It also called for improvements in recruitment and accounting practices, noting that gaps in financial records covering billions of pounds of assets remain unresolved.

The report warned that without a clear and timely defence investment strategy, the UK risks weakening its military readiness and its standing among allies, particularly within NATO.

Officials say the Defence Investment Plan will ultimately provide the framework needed to modernise the armed forces, but pressure is mounting for its publication to avoid further uncertainty and cost escalation.