Opposition calls for Raider consideration as it opens some exciting doors, if we’re brave enough to knock

In his National Press Club address and subsequent remarks, the opposition defence spokesperson framed the bomber as a possible contingency if the AUKUS submarine timetable slips, and ABC reported that he saw the aircraft as a way to bridge a long-range strike gap until Virginia Class boats and, later, SSN-AUKUS arrive.

That matters because the debate is no longer only about submarines; it is about whether AUKUS partners are willing to think in genuinely integrated terms about deterrence, long-range strike, autonomy and industrial depth. Senator Paterson’s intervention also lands against a backdrop of UK concern about AUKUS delivery risk, which has sharpened the political salience of “Plan B” thinking in Canberra and London.

The B-21 Raider is not simply a replacement for legacy bombers; it is designed as the centrepiece of a future strike ecosystem. Developed by Northrop Grumman for the United States Air Force, the aircraft is built to penetrate advanced air defence systems, deliver both conventional and nuclear payloads, and operate as part of a highly networked force.

What distinguishes the B-21 is its digital-first design philosophy? Its open architecture allows rapid upgrades to software, sensors and mission systems, while its development has leveraged digital engineering to accelerate testing and production. This makes it less of a static platform and more of an adaptable node within a wider system of systems.

For AUKUS partners, this distinction is critical. The opportunity is not merely to “join” a bomber program but to integrate into and help shape the ecosystem that surrounds it.

Accordingly, the B-21 is attractive in this debate because it is not just another aircraft. Northrop Grumman described it as a sixth-generation stealth platform built for penetration of highly defended airspace, able to carry both conventional and nuclear payloads, with an open systems architecture designed for continual upgrades.

VIEW ALL

The company also said multiple B-21s are already in flight test and that the program’s digital engineering environment has reduced software certification time and accelerated production learning. In other words, the Raider is being built not as a one-off exquisite asset, but as the core node of a survivable long-range strike ecosystem.

AUKUS framework opens some doors

That makes it especially relevant to any AUKUS discussion because the alliance’s own language increasingly talks about integrated deterrence, layered capabilities and advanced systems rather than single-platform solutions.

The first and most important point, though, is that “joining the B-21 program” is not the same thing as buying into a normal coalition aircraft project. The B-21 sits at the centre of US strategic air power, and Northrop and the US Air Force both present it as foundational to America’s long-range deterrent.

That does not make foreign cooperation impossible, but it does mean the threshold for any non-US role will be much higher than for a typical export aircraft.

The practical reality is that the most credible AUKUS avenue is probably not Australia or the UK becoming junior co-prime contractors on the bomber itself but rather integrating AUKUS industry and research and development into adjacent areas: mission systems, sensors, autonomy, electronic warfare, software, data architecture, weapons integration and uncrewed adjuncts.

That is where Pillar 2 already points.

That is because AUKUS Pillar 2 is already the institutional home for this kind of work. The 2023 and 2024 defence ministers’ statements make clear that Pillar 2 is about advanced capabilities, joint innovation, co-development, co-production and co-sustainment, as well as the alignment of export and trade rules.

Defence’s AUKUS Advanced Capabilities Division exists specifically to coordinate Australia’s contribution to trilateral advanced capability development.

The UK and Australian governments have also backed trilateral innovation challenge series that run across all three countries, and the UK’s competition documents explicitly say the Pillar 2 innovation challenge is open across Australia, the UK and the United States.

That is a useful precedent: if the B-21 is too sensitive to become a shared bomber in the narrow sense, the alliance can still build a shared strike architecture around it.

A reality check: Limits to direct participation and the CCA opportunity

Any discussion of Australia or the United Kingdom joining the B-21 program must begin with a clear-eyed assessment of constraints. The Raider sits at the heart of US strategic deterrence. Its stealth characteristics, mission systems, and nuclear delivery role make it one of the most sensitive defence programs in the world.

This reality sharply limits the scope for traditional forms of international collaboration. Unlike programs such as the F-35, the B-21 is not designed as a multinational development effort. Accordingly, the likelihood of Australia or the UK becoming full industrial partners in the airframe or its most sensitive systems is low.

However, this does not preclude meaningful collaboration, rather it simply shifts the focus away from the bomber itself and towards adjacent capabilities, areas where AUKUS can add real value without compromising US strategic control.

The clearest near-term opportunity is a jointly developed loyal wingman or collaborative combat aircraft built to complement the Raider. That idea fits the existing AUKUS frameworks extremely well. The 2023 and 2024 ministerial statements already talk about networked autonomy, decision advantage and enhanced strike as Pillar 2 outcomes.

The UK’s Strategic Defence Review said British Defence should become a tech-enabled force that innovates at wartime pace, while the First Sea Lord has publicly argued for precision long-range strikes and uncrewed air, land and sea systems as central to Britain’s future force structure.

Put together, the strategic logic is obvious: a B-21 operating with one or more AUKUS-developed uncrewed escorts, decoys, sensor trucks or electronic attack platforms would be a more scalable, more survivable and more politically exportable capability than trying to replicate the bomber itself.

Operationally, the bomber becomes the manned spearhead; the loyal wingman family becomes the alliance’s mass, persistence and expendability layer. A trilateral AUKUS CCA program would offer several advantages. It would distribute development costs, accelerate innovation through shared expertise, and create a scalable force multiplier for crewed platforms like the B-21.

Australia is particularly well positioned to contribute in this space, building on its experience with autonomous systems and mission software. The United Kingdom, meanwhile, brings strengths in advanced aerospace engineering, AI integration, and complex weapons systems, meanwhile the United States would provide the operational framework and integration with the B-21 itself.

Breaking this down to an even more granular level, Australia could focus on areas such as:

• Autonomous systems and mission software.
• Electronic warfare and spectrum operations.
• Secure communications and networking.
• Sustainment and low-observable maintenance.

The United Kingdom could contribute:

• Advanced sensors and mission systems.
• AI-enabled decision support.
• Weapons integration.
• Broader industrial capacity in Europe.

The United States would remain the lead for:

• The B-21 platform itself.
• Highly classified stealth technologies.
• Core mission systems and nuclear integration.

This model reflects a pragmatic approach: leveraging each nation’s strengths while respecting the constraints imposed by strategic sensitivity.

Together, this could produce a family of systems that significantly enhances allied long-range strike capability without requiring full access to the bomber’s most sensitive technologies.

The strategic logic and practical challenges

For Australia, the idea of acquiring the B-21 is both attractive and fraught. On one hand, the aircraft offers a credible long-range strike capability that could fill a gap left by the retirement of the F-111 and the delayed arrival of nuclear-powered submarines under AUKUS.

A small fleet of Raiders could provide significant deterrence value, particularly in scenarios where Australia needs to project power across vast maritime distances. On the other hand, the challenges are substantial, including, the cost of acquisition and sustainment, the need for specialised infrastructure and basing, training and workforce requirements and integration into Australia’s existing force structure.

For the United Kingdom, the calculus is different. The UK is already investing in long-range precision strike capabilities and next-generation air systems. Its strategic direction emphasises a mix of crewed and uncrewed platforms, supported by advanced technologies.

While a B-21 acquisition could enhance the RAF’s capabilities, it would also compete with existing programs and industrial priorities. A more likely pathway is for the UK to engage through complementary systems, particularly in areas aligned with AUKUS Pillar 2.

This approach would allow Britain to strengthen its role within AUKUS while maintaining its own sovereign capability development.

Final thoughts

Ultimately, the question is not whether Australia or the UK can “join” the B-21 program in a traditional sense. It is whether AUKUS can use the Raider as a foundation for a broader, more integrated approach to deterrence.

This means thinking in terms of ecosystems rather than individual platforms. It means prioritising interoperability, scalability, and adaptability. And it means leveraging the full potential of AUKUS Pillar 2 to deliver advanced capabilities at speed.

Paterson’s intervention is valuable precisely because it pushes the conversation in this direction. By raising the possibility of B-21 collaboration, he has highlighted the need for a more ambitious vision of what AUKUS can achieve.

The B-21 Raider should not be seen as a simple procurement option or a fallback plan for AUKUS. Instead, it represents an opportunity to rethink how the three partners collaborate on long-range strike and advanced military capabilities.

Direct participation in the bomber program may be limited, but the potential for collaboration around it is significant. From loyal wingmen and autonomous systems to digital infrastructure and industrial integration, there are numerous pathways for AUKUS to enhance its collective capability.

If approached strategically, the B-21 could become not just an American asset, but the centrepiece of a broader AUKUS strike ecosystem, one that delivers greater deterrence, resilience and operational flexibility for all three partners.

Get involved with the discussion and let us know your thoughts on Australia’s future role and position in the Indo-Pacific region and what you would like to see from Australia’s political leaders in terms of partisan and bipartisan agenda setting in the comments section below or get in touch at This email address is being protected from spambots. You need JavaScript enabled to view it. or at This email address is being protected from spambots. You need JavaScript enabled to view it..

Stephen Kuper

Steve has an extensive career across government, defence industry and advocacy, having previously worked for cabinet ministers at both Federal and State levels.