UK and Germany's Defence Collaboration: Where It Stands and Where It's Heading

The UK and Germany are, on paper, natural defence partners. They're NATO's two largest European spenders and the two largest European backers of Ukraine in absolute financial terms. But for most of the post-Brexit period, that shared position translated into surprisingly little joint delivery. That's now changing, driven less by sentiment than by necessity: a less predictable United States, a Russia that shows no sign of backing down, and two governments that have concluded they can no longer afford to plan in isolation from each other.

From declaration to treaty

The current phase of cooperation traces back to October 2024, when the UK and German defence ministers signed the Trinity House Agreement, just 111 days after Labour took office. The agreement covers strengthening defence industries, reinforcing Euro-Atlantic security, improving interoperability, and working jointly on future Deep Precision Strike capabilities. It also established "lighthouse projects" as early proof points, including German maritime patrol aircraft now operating from RAF Lossiemouth, and set up new governance structures intended to speed up delivery rather than let it stall in bureaucracy.

Trinity House was designed as a precursor to something bigger: a full bilateral treaty, expected to be signed once Germany's new government took office in May 2025, covering not just defence but foreign policy, justice, economic growth, science and technology, energy and the environment. The scale of that ambition is itself a risk. Cooperation under the widened treaty could touch as many as 13 of the UK's 34 ministerial departments and 10 of Germany's 15 federal ministries, and analysts have warned that spreading political attention across too many policy areas at once could dilute the progress already made specifically on defence.

What the agreement notably left out, at least initially, was export controls, historically a sticking point between the two countries. That matters more now than it did in 2024, because Deep Precision Strike and other joint capability programmes will carry real export potential, particularly toward Ukraine, and confidence in future joint procurement depends on sorting that out.

Two very different starting points

The core tension in the relationship right now isn't political goodwill, which by most accounts is genuinely strong on both sides. It's that the UK and Germany are approaching defence transformation from opposite directions.

The UK's 2025 Strategic Defence Review set out an ambitious vision for how forces need to be reconceived and rebuilt, but the funding to match that vision arrives slowly: little new money before 2027, rising to 2.5% of GDP that year, and 3.5% by 2035. Critics, including some closely involved in writing the review, have argued that the UK is planning with the right ambition but on a timeline roughly twice as long as the threat environment allows for.

Germany is moving in almost the opposite way. Chancellor Friedrich Merz has pledged to build the Bundeswehr into the strongest conventional army in Europe, backed by plans to spend 3.5% of GDP on defence by 2029 and €649 billion over five years, funded by loosening the country's constitutional debt brake. A leaked internal document reportedly details €377 billion of equipment purchases across all domains, most of it already assigned to named contractors, the large majority of them German firms. The concern raised by defence analysts is that this level of spending isn't yet paired with the same conceptual rethink the UK has attempted, meaning Germany risks buying a very large, very expensive conventional force that isn't necessarily built for the digitised, autonomous-enabled warfare both countries agree is coming.

The argument increasingly made in UK and German policy circles is that these gaps are complementary rather than competing: British thinking, German capital. Whether that translates into real joint programmes rather than parallel national efforts is the open question defence policy circles are currently debating.

Where the practical cooperation is heading

Beyond the high-level treaty architecture, specific capability areas have been identified as ripe for deeper joint work: precision deep strike, anti-submarine warfare, and armoured mobility, building on the RBSL joint venture between BAE Systems and Rheinmetall that already underpins the Challenger 3 and Boxer programmes. There's also renewed interest in joint development around future combat air, aligning the UK's Tempest programme with Germany's involvement in FCAS, though the two nations currently sit on different sixth-generation fighter programmes rather than a shared one.

Progress, by most accounts, has been slower than the political rhetoric implies. EU initiatives around joint procurement have proven difficult for the UK to access as a non-member, and regulatory friction, particularly around export controls and differing industrial strategies, continues to complicate what should be straightforward wins. Germany has published its own National Security and Defence Industry Strategy focused on pan-European cooperation, while the UK's parallel Defence Industrial Strategy leans toward onshoring a greater share of its own industrial capacity, a difference in emphasis that will need reconciling if the two countries are serious about joint procurement at scale.

Impact on hiring

For recruiters, the UK-Germany relationship is creating demand in ways that don't always show up in the headline defence budget figures.

The most immediate effect is on roles tied to interoperability and joint programme delivery: officers, civil servants and industry professionals who can operate comfortably across UK and German defence structures, understand both nations' procurement processes, and navigate export control regimes that remain only partially aligned. Trinity House's governance structures, along with the embedding of a German military planner directly within the UK's Strategic Defence Review team, point to a growing need for people who can work as genuine liaisons rather than pure specialists in one national system.

Germany's spending pace, considerably faster than the UK's, is already pulling industry attention and capital away from British and French primes toward German contractors and their supply chains. For recruiters, this means increased demand for engineering and programme management talent within German defence manufacturing, alongside a parallel need in the UK for commercial and finance professionals who can help smaller UK suppliers survive funding gaps while SDR implementation catches up. Analysts have noted that small UK defence firms can't sustain themselves if the nearest order is three years out, which puts pressure on companies to hire experienced business development and contracts specialists capable of bridging that gap.

There's also a specific, narrower opportunity building around the named capability areas: deep precision strike, anti-submarine warfare and armoured mobility. As joint programmes in these areas mature, expect rising demand for munitions and missile systems engineers (an area where Germany has previously sought to reduce reliance on US suppliers), naval warfare specialists, and armoured vehicle engineers who can work across the RBSL joint venture's British and German operations. Given how slowly some of this cooperation has moved to date, recruiters should treat much of this as a medium-term pipeline to build toward now, rather than an immediate hiring surge.