UK commits £300 billion to defence over ten years, targeting 3% of GDP by 2030

Summary

Britain's government pledged £300 billion in defence spending over the next decade on June 30, setting a trajectory to 3% of GDP by 2030 and positioning itself as the biggest per-capita defence spender among European NATO allies within two years. Prime Minister Keir Starmer framed the commitment as a direct response to the Iran war's exposure of European readiness gaps, with the spending envelope tied to the Strategic Defence Review. Priority lines include Royal Navy surface combatants built at Scottish and Tyneside yards, a long-range strike arsenal restocked after Operation Epic Fury depleted existing stocks, and a new space domain command. The announcement, eight days before the NATO Alliance summit in Ankara, is calibrated to show Washington that London is leading European Defence Spending Surge rather than waiting for German or French commitment.

The split

The UK government frames the plan as strategic necessity and industrial opportunity, citing tens of thousands of manufacturing jobs in constituencies that returned Labour MPs in 2024. Conservative opposition argues the 3% GDP target is a repackaging of previously announced spending with new borrowing classified as capital investment to sidestep fiscal rules, and accuse Starmer of discovering defence spending only after its polling benefits became obvious. Left-wing Labour backbenchers raised no formal objection but questioned what domestic programmes would be deferred, a tension the Treasury has declined to itemise publicly.

By the numbers

• £300 billion, total ten-year commitment
• 3% of GDP, UK defence spending target by 2030 (up from ~2.3% in 2025)
• £5 billion, allocated annual shipbuilding line in Scotland and north-east England
• 8 days, gap to the NATO Ankara summit that framed the announcement's timing

Why it matters

Britain is the first major European power to publish a fully costed ten-year defence envelope since the Iran war reset threat perceptions. The announcement sets a benchmark that France and Germany will face pressure to match at Ankara, and directly feeds the Defence Spending Surge tracker. It also concentrates a large share of NATO's future industrial output in BAE Systems and Rolls-Royce supply chains, giving UK industry outsize leverage over European readiness for the remainder of the decade.

What to watch

• Whether France and Germany match the 3% target at the Ankara summit on July 7-8
• Parliamentary passage of the borrowing authorisation, and whether Labour rebels force a vote
• First contract awards under the shipbuilding line, expected in late 2026
• US response: Trump has demanded 5% from European allies, so 3% may still draw American pressure