The European Union’s rearmament drive is delivering visible results on the ground, with new factories opening and national defence champions emerging across member states, but the bloc is struggling to resolve a more basic question: who gets to take part. Britain has been effectively priced out of the EU’s flagship defence fund after negotiations over a participation fee collapsed, even as Brussels has shown flexibility on eligibility rules for other partners.
The dispute centers on the Security Action for Europe program, known as SAFE, a joint borrowing instrument designed to fund defence procurement across the bloc. The Council authorized the European Commission in September 2025 to begin negotiations on allowing the United Kingdom and Canada into the instrument, and London appeared to have secured a defence cooperation agreement with the EU last year. Talks over the actual cost of participation then broke down, with France pushing the Commission to demand more than 6 billion euros from Britain for access to the fund.
British officials balked at the price tag. Nick Thomas-Symonds, the UK’s EU relations minister, said negotiations “were carried out in good faith, but our position was always clear: we will only sign agreements that are in the national interest and provide value for money,” according to reporting on the talks. The collapse, which came at the end of November, means British defence firms will now be limited to participating in SAFE projects on third country terms, capped at a maximum of 35 percent of the value of any given contract, rather than the fuller access London had hoped to negotiate.
The breakdown is a setback for both sides. Analysts note that excluding a major European defence manufacturer like the UK from full participation undercuts the credibility of SAFE as a genuinely continental rearmament effort, while also limiting the pool of suppliers available to EU governments racing to rebuild depleted munitions stockpiles and modernize their militaries. The dispute has also strained the broader post Brexit security relationship between London and Brussels, which had shown signs of warming amid shared concerns over Russia’s war in Ukraine and shifting American security priorities under the Trump administration.
The SAFE program itself, accelerated by the war in Ukraine and doubts about the reliability of U.S. defence commitments, is intended to boost domestic production capacity across the EU and reduce dependency on non European suppliers, including American arms manufacturers. Supporters argue the fund has already succeeded in spurring new investment in manufacturing capabilities in several member states, even as the broader question of third country access remains unsettled.
The tension between strategic autonomy and the practical need to work with capable outside partners has not been resolved by the UK dispute, and observers expect similar disagreements to resurface as the EU negotiates terms for other non member states seeking access to its defence procurement instruments. For now, Britain’s defence industry finds itself on the outside of a fund it helped inspire, watching as EU based rivals gain preferential access to billions of euros in joint financing.
Sources: Chatham House, UK in a Changing Europe, ClashReport.
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