UK watchdog criticises defence nuclear spending transparency and investment delays

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UK nuclear defence spending scrutiny

Highlights

The Public Accounts Committee reports the Defence Nuclear Enterprise lacked accounting records for over £6bn in assets in the 2024-25 annual report.
Nuclear spending reached £10.9bn, or 18% of the UK defence budget in 2024-25, expected to rise to 25% in coming years with vague cost reporting on the £41bn Dreadnought fleet.
The committee criticises delays in the defence investment plan and questions the £6bn Ajax vehicle programme's viability, warning of further cost escalation with proposed upgrades.

Nuclear costs and oversight concerns

According to the Financial Times, as reported by the Public Accounts Committee, the Ministry of Defence has not provided enough transparency over spending by the Defence Nuclear Enterprise, which covers organisations responsible for operating and maintaining the UK nuclear deterrent.

The committee says the Defence Nuclear Enterprise lacked accounting records to support more than £6bn of assets in its 2024-25 annual report. It adds that nuclear spending reached £10.9bn, or 18 per cent of the UK defence budget, in 2024-25, and is expected to rise to 20 per cent in 2025-26 and 25 per cent in coming years.

Britain's nuclear deterrent consists of submarines carrying U.S.-made Trident nuclear missiles and remains one of the most secretive programmes in the Ministry of Defence. The report says the planned fleet of four Dreadnought submarines, intended to replace the ageing Vanguard class, is expected to cost £41bn, while current reporting is too vague to allow parliament to understand the activities involved, their costs and how those costs have changed over time.

Following the report, the government agrees to create a new House of Commons committee to scrutinise Defence Nuclear Enterprise expenditure and programmes. One government official says this is the first time there will be proper parliamentary oversight of nuclear expenditure, adding that Defence Secretary John Healey strongly supports greater scrutiny.

Broader pressure on defence programmes

The committee also criticises the delay in publishing the government's defence investment plan, which was originally scheduled for last year. It says the UK has gone years without a credible plan for military capability, deepening concerns about how long-term defence priorities are being managed.

The report extends that criticism to the Ajax armoured vehicle programme, which has cost more than £6bn and has been dogged by controversy after soldiers reported hearing loss and vomiting following a training exercise. The committee questions whether Ajax is fit for purpose and warns that proposed upgrades under Ajax 2 could force the Ministry of Defence to spend even more in an attempt to salvage the programme.

Our previous coverage of the Senate call for an ethics investigation into former DHS adviser Corey Lewandowski highlighted lawmakers’ demands for clearer accountability and transparency around alleged misconduct. We noted that senators argued a prompt, formal inquiry was needed to protect public trust and reinforce oversight mechanisms for how agencies handle potential ethical breaches.

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