UK defence funding crisis has been a long time coming

What Happened

UK Defence Secretary John Healey resigned on Thursday after Prime Minister Keir Starmer offered an additional £2 billion (0.08% of GDP) for defence by 2030, which Healey deemed 'well short of what is required'. The row centred on the defence investment plan (Dip), covering projects such as the £41 billion Dreadnought nuclear submarine replacement, drone programmes, and the Aukus nuclear-powered submarine partnership with Australia and the US. The funding gap, originally £28 billion and later reduced to £18 billion, saw the Treasury only willing to provide £13.5 billion, with no political appetite for tax increases or spending shifts. Healey refused to release the Dip on Thursday, and a planned press event with Australia's deputy prime minister on Aukus was cancelled. The resignation comes less than a month before a Nato summit in Ankara and ahead of a visit by Japan's prime minister Sanae Takaichi, both contexts in which UK defence commitments are critical.

Key Actors

Why It Matters

The crisis exposes deep deficiencies in UK defence funding, jeopardising flagship programmes like Aukus and the ability to contribute meaningfully to multinational operations, including a proposed UK–France-led force to secure the Strait of Hormuz if an Iran war concludes. It calls into question the UK's reliability as a Nato ally just as Donald Trump threatens renewed bombing of Iran, and as European allies seek a united front on Ukraine and the Middle East.

Watch For

The Nato summit in Ankara in less than a month, where Starmer must address allies' concerns. The upcoming visit by Japan's PM on Sunday, where reassurance on the GCap next-generation fighter programme will be necessary. Any Treasury–MoD negotiations on bridging the remaining funding gap, and signals from Australia on the viability of Aukus timelines.