UK defence funding gap sharpens pressure on Starmer over military priorities

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UK defence funding gap debate

Highlights

Resignations at the Ministry of Defence highlight a £28 billion gap between the UK’s 2025 strategic defence ambitions and current planned spending.
Britain’s defence budget was about £60 billion last year, but priorities set out in the 2025 review may require an additional £68 billion over the coming decade.
Shifting focus from small overseas campaigns to defending maritime routes and undersea cables increases pressure on naval and air forces while straining resources for conventional army units.

Spending plans strain defence strategy

As reported by Financial Times, the latest resignations at the Ministry of Defence have brought into focus a widening gap between the UK’s military ambitions and the funding currently planned to support them. John Healey quit as defence secretary on Thursday, followed by armed forces minister Al Carns and two ministerial aides, after accusing the government of not approving a large enough increase in spending to keep Britain safe.

Starmer says he has already shifted resources from other departments into defence and points to a rise in spending from 2.3 per cent of GDP to 2.6 per cent by 2027. He also says the proposed multiyear Defence Investment Plan includes a significant uplift to help fund fighter jets, drones, naval capabilities and long-range missiles.

The scale of the requirement remains much larger. Britain’s defence budget stood at about 60 billion pounds last year, while the 2025 strategic defence review set out priorities that officials estimate could need roughly 68 billion pounds in extra funding over the next decade or so. Internal Ministry of Defence estimates have suggested a gap of about 28 billion pounds between those ambitions and current spending plans, while the forthcoming Defence Investment Plan is understood to offer only 13.5 billion pounds in additional funds.

Major commitments include up to 12 conventionally armed, nuclear-powered attack submarines under the Aukus programme, each potentially costing between 2 billion pounds and 3 billion pounds, as well as the UK share of the Global Combat Aircraft Programme with Italy and Japan. A further tranche of 27 F-35 stealth fighters, on top of 48 already bought, could add about 100 million pounds per aircraft.

Strategic trade-offs reshape UK military role

The funding dispute is unfolding as Britain rethinks how it fights and what capabilities it most needs. After years of preparing for smaller overseas campaigns such as Iraq and Afghanistan, planners are now focusing more heavily on defending the north Atlantic, protecting undersea cables and securing maritime supply routes following Russia’s invasion of Ukraine.

That shift places greater emphasis on naval and air power and leaves the army facing harder choices. At about 73,000 personnel, it is already at its smallest size since the Napoleonic era, and analysts say it may bear the brunt of future trade-offs as drones, electronic warfare and long-range precision strikes alter the battlefield. Before resigning, Carns said last month that NATO must absorb the lessons from Ukraine and adapt how it fights.

A more distant relationship with the U.S. could further increase costs because Britain and its allies may need to fund capabilities long provided by Washington, including strategic airlift, missile warning, intelligence and satellites. Nuclear spending is another pressure point, with Parliament’s Public Accounts Committee saying earlier this month that the nuclear enterprise consumed about 12 billion pounds of the 60 billion pound defence budget last year, and some estimates suggest that share could approach a quarter within 10 years as Dreadnought submarines replace the Vanguard class.

Critics say that leaves too little room for conventional forces and forces the UK to make harder strategic choices. Paolo Surico, professor of economics at London Business School, says the budget is being spread too thinly across the army, navy, air force and nuclear deterrent, increasing the risk that Britain tries to do too much without enough scale. With Healey gone, newly appointed defence secretary Dan Jarvis now faces the task of deciding where the UK concentrates its military resources.

In our earlier coverage of political disputes over defence budgets in Europe, we noted that investors were reassessing the multi-year rally in defence stocks as doubts grew over whether governments would deliver the spending increases they had signalled. Using the UK as a key example, the article highlighted that John Healey’s push for defence spending to reach 3% of GDP by 2030 was falling short in planned commitments, while procurement delays and softer spending assumptions were starting to feed into company forecasts and valuations across the sector.

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