Britain has decided not to join a global defence bank led by Canada, opting instead to support a separate UK-driven financing initiative aimed at addressing significant shortfalls in its defence budget. Chancellor John Healey is expected to announce his backing for this alternative plan in the upcoming Budget.

Discussions between British Prime Minister Andy Burnham and Canadian Prime Minister Mark Carney last month had explored the possibility of Britain joining the Ottawa-led Defence, Security and Resilience Bank (DSRB). However, talks between London and Ottawa failed to produce an agreement on merging the two ventures. British officials said the inability to reconcile differences, including the issue of dual headquarters in Canada and Europe, contributed to the decision.

The British government emphasized that its relationship with Canada remains strong and characterized the decision not to proceed with a merger as mutual. A joint statement from both finance ministries indicated they would work towards a cooperative framework supporting two distinct but complementary defence financing institutions.

Instead of joining the DSRB, Britain will back the Multilateral Defence Mechanism (MDM), an initiative initially promoted by former chancellor Rachel Reeves. The UK has already pledged £400 million towards the MDM, which also counts the Netherlands, Poland, and Finland as members. The mechanism aims to enhance procurement and stockpiling capabilities by leveraging low-cost borrowing to finance defence spending more effectively.

Increasing the defence budget is a stated priority for Healey, who previously served as defence secretary. The UK’s defence investment programme currently faces a £4.7 billion funding gap following a lack of upfront financing from Reeves, who resigned from the Treasury in June amid disagreements with Healey. Central to their dispute was the failure to secure funds to raise UK defence spending to 3 percent of GDP by 2030, a target Healey deemed essential.

While additional defence funding is not expected until a full spending review next year, Healey is anticipated to signal his commitment to closing the funding gap in his forthcoming Budget speech.

The Canadian-led DSRB had promised to offer long-term, low-cost financing to support Canada and European countries in meeting their combined pledge to increase defence spending by €850 billion annually under NATO commitments. However, objections from European members related to the proposed joint headquarters location and divergent priorities on procurement complicated efforts to unify the initiatives.

European members favored a focus on joint procurement, a feature emphasized by the MDM but less so by the DSRB. Differences also emerged over the criteria for future membership in a combined institution.

Despite the split, officials from both sides have pledged to develop cooperative measures to promote shared objectives in defence financing, underpinning their commitment to maintaining close collaboration amid ongoing geopolitical challenges.