Defence in the High North (Parliamentary evidence)
Overton Advisory submitted written evidence to the Defence Committee’s inquiry into Defence in the High North. The original is available here
Summary
The High North is rapidly shifting from a peripheral region to a strategically contested theatre, central to NATO’s northern flank, critical infrastructure security, and North Atlantic sea lines of communication. While the UK’s strategic intent is broadly clear and aligned with NATO, delivery remains inconsistent. The current posture is better suited to episodic deployment than sustained presence, with gaps in logistics, infrastructure, and Arctic-optimised capability. At the same time, the threat environment is intensifying, driven by Russian military activity, increasing sub-threshold operations, and a growing, though secondary, Chinese presence, all compounded by challenging environmental conditions.
The UK’s approach remains heavily reliant on allies, particularly the United States, which supports deterrence but limits independent or lead-nation capability. Although the High North offers a valuable testbed for transferable, next-generation capabilities, this is not yet fully aligned with the UK’s growth and export agenda. Strong industry demand is not being matched by procurement speed or delivery. Overall, the UK’s strategy is sound, but execution remains the central challenge, requiring faster procurement, stronger industry integration, and sustained investment in Arctic-capable force design.
1. What are the UK’s defence and security interests in the High North, and what are the current and emerging threats relating to the region?
The UK’s defence and security interests in the High North are driven by its role as a leading NATO member and a North Atlantic power. The region is central to the defence of NATO’s northern flank, particularly the GIUK gap and the wider Nordic and Baltic regions, and to maintaining secure lines of communication and shipping across the North Atlantic. It is also critical to the protection of undersea infrastructure, including cables and energy pipelines, which underpin both national security and economic resilience. As ice coverage recedes, the growing accessibility of Arctic maritime routes further elevates the importance of freedom of navigation and strategic presence.
The threat environment is intensifying. Russia remains the principal actor, with sustained military investment and activity in the Arctic, including submarine and autonomous operations and forward basing, enhancing its ability to project power into the North Atlantic. Alongside this, there is a rise in sub-threshold activity, including infrastructure surveillance and seabed operations, which are difficult to detect, attribute, and deter. The vulnerability of undersea infrastructure presents a particular and acute risk. China’s presence is more limited but growing, with increasing economic and dual-use engagement that may translate into longer-term strategic influence. Environmental conditions also act as a force multiplier, placing strain on forces and complicating sustained operations. Taken together, the High North is shifting from a peripheral region to a strategically contested theatre, requiring credible deterrence, resilient infrastructure, and sustained allied capability and coordination.
2. Does the UK have clear and achievable defence and security policies for the region, including their relationship with those for adjacent regions – such as the Royal Navy’s Atlantic Bastion, Atlantic Shield and Atlantic Strike concepts?
The UK’s defence and security policies for the High North are directionally clear and broadly aligned with NATO, particularly in their emphasis on deterrence, North Atlantic security, and integration with allied frameworks, as well as ongoing joint initiatives with other NATO allies, such as the recently announced joint statement between the UK, Finland, and the Netherlands on defence financing and procurement. Concepts such as the Royal Navy’s Atlantic Bastion, Atlantic Shield, and Atlantic Strike provide a coherent strategic intent centred on protecting critical infrastructure, securing sea lines of communication, and countering submarine threats across the North Atlantic and Arctic approaches.
However, while the strategic direction is credible, delivery can often be less consistent, undermining credibility amongst industry. 41% of respondents to the Overton Defence Sentiment Index believe the Government’s defence industrial strategy is unclear or very unclear. Worryingly, only 1% of respondents found the strategy very clear. That being said, nearly a fifth of respondents (19%) believe that procurement contract decisions and delivery have improved over the past year.
The relationship between these concepts and wider regional operations is not always clearly defined at the operational level, and there is limited visibility on how they translate into sustained presence or capability in the High North itself, especially during a time of stretched public finances and increasingly thinly spread force deployment. In practice, the UK’s posture is often described as more episodic than persistent, with deployments and exercises not yet matched by the permanent infrastructure, logistics, and force design required for long-duration operations in Arctic conditions.
There is also a broader issue of prioritisation. It remains unclear whether the High North is being treated as a primary operational theatre or as one of many equally important theaters. This ambiguity risks weakening both planning and industrial alignment, particularly in areas such as procurement and capability development.
Overall, the UK has a clear strategic framework, but its achievability will depend on greater integration between concepts, clearer operational prioritisation, and a shift from episodic engagement towards sustained, credible capability in the region.
3. How will the UK work with, and without, key allies and partners in the region, both within and outside NATO, including through the JEF, and how does this support or undermine the UK’s policies set out in ‘b’?
The UK’s approach to the High North is inherently alliance-dependent and will continue to be delivered primarily through NATO, the Joint Expeditionary Force (JEF), and close bilateral relationships with Nordic and North Atlantic partners. Within NATO, the UK contributes to deterrence, maritime security, and ISR, while the JEF provides a more flexible, regionally focused framework that is particularly well suited to High North operations. The UK’s leadership role within the JEF, alongside countries such as Norway, Denmark, Finland, and Sweden, offers a credible platform for rapid coordination, interoperability, burden-sharing, and decision-making in northern Europe.
However, reliance on allies, particularly the United States, remains a structural feature of the UK’s posture. Critical enablers such as ISR, logistics, and undersea capabilities are still heavily dependent on US support and integration. While this enhances overall deterrence, it also creates vulnerabilities if US priorities shift or if operations need to be conducted at a sub-alliance level.
The ability to operate “with and without” allies will therefore depend on strengthening European and JEF-led capability. This includes deeper integration with Nordic partners, pre-positioning of equipment, shared infrastructure, and greater alignment of procurement and force design. The JEF in particular offers a credible mechanism for operating below the NATO threshold, enabling faster and more politically agile responses in the region, with a clear NATO backstop.
This approach broadly supports the UK’s policies, particularly in terms of interoperability and allied alignment. However, it also exposes some of their limitations. The lack of clear operational prioritisation and limited investment in persistent capability mean that the UK’s ability to act independently or as a leading partner within smaller coalitions could remain constrained without further government support. Nearly half (44%) of respondents to a recent Overton Defence Sentiment Index survey think that there is a significant gap between the Government’s strategy and its delivery, while just over a third (38%) do not view the Government’s strategy as coherent.
In practice, the UK’s effectiveness in the High North will depend on its ability to move beyond reliance on large-scale NATO structures and towards more flexible, regionally integrated operating models, while retaining the credibility and deterrent value that NATO provides.
4. Do UK Armed Forces have appropriate capabilities for sustained operations in the region now; and are appropriate plans in place to meet the needs of the future?
UK Armed Forces have a credible base for operating in the High North, but do not yet possess the full capability or posture required for sustained operations. The UK retains particular strengths in anti-submarine warfare, maritime patrol aircraft, carrier strike, and Royal Marines’ cold-weather expertise, and continues to contribute meaningfully through NATO and the Joint Expeditionary Force.
There remain gaps in sustainment, logistics, and force design for long-duration operations, as well as autonomous integration, although the UK is seeking to remedy this deficit through programmes like Atlantic Bastion. The UK does not maintain forces specifically configured for the High North, instead drawing on general-purpose capabilities, which limits specialisation and continuity. Extended periods of reduced operational focus in the region have also affected familiarity with Arctic conditions, including the performance of equipment and the maintenance of specialist skills.
The Government’s direction of travel is broadly appropriate. Recent policy frameworks, including the Strategic Defence Review and associated North Atlantic concepts, recognise the growing importance of the region and emphasise maritime security, undersea infrastructure protection, and the development of autonomous and surveillance capabilities of both long-range and oxygen-deprived environments. However, many of these initiatives need to be delivered much faster and at greater scale, with industry’s ability to deliver dependent on forthcoming investment decisions and procurement timelines. Just over a majority (53%) of respondents to the Overton Defence Sentiment Index rated Government delivery as weak, compared to 10% who rated it as strong. However, over two-thirds (68%) of respondents plan to increase investment over the coming year, indicating a belief that procurement decisions will hopefully increase in volume and pace.
In practice, the UK has sufficient capability to contribute credibly to allied operations today, but not yet the depth, persistence, or Arctic-specific capacity required for sustained independent or lead-nation operations, especially for prolonged periods of time or if spread over large theatres and across multiple domains. Plans to address these gaps are in place, but their effectiveness will depend on timely execution, sustained funding, and closer alignment between strategy, industry, procurement, and operational requirements and delivery.
5. To what degree can military capabilities developed for the High North be re-deployed for operations in other theatres, and vice versa?
Military capabilities developed for the High North are, to a significant degree, transferable across other theatres, particularly where they are designed for resilience, autonomy, and operation in contested or degraded environments. Capabilities such as autonomous systems, secure communications, intelligence, surveillance and reconnaissance (ISR), and low-signature platforms are inherently adaptable and can be deployed across maritime, land, and multi-domain contexts. In this sense, the High North acts as a demanding test environment, where systems proven under extreme conditions are likely to perform effectively elsewhere.
Capabilities developed for Arctic operations, particularly those relating to logistics, energy resilience, and platform durability, also have wider application in austere or remote environments, including expeditionary operations and contested supply chains. Investment in these areas therefore delivers cross-theatre value and supports broader force readiness.
However, there are limits to this transferability. Certain capabilities are highly environment-specific, including cold-weather equipment, ice-capable platforms, and specialised training. These may have reduced utility outside Arctic conditions and can carry additional cost or complexity when deployed elsewhere.
Conversely, many existing UK capabilities developed for other theatres can be adapted for the High North, but often require modification. Platforms, personnel, and systems not designed for Arctic conditions may face reduced effectiveness without appropriate adaptation, particularly in areas such as sustainment, endurance, and environmental resilience.
Overall, the majority of capabilities relevant to the High North are dual-use across theatres, particularly in the context of modern, multi-domain operations. The key consideration is ensuring that capability development is approached in a way that maximises transferability while recognising the need for targeted investment in Arctic-specific requirements.
6. How does the UK’s defence and security strategy for the region align with the Government’s wider growth and defence exports agenda?
The UK’s defence and security strategy for the High North is, in principle, well aligned with the Government’s wider growth and defence exports agenda. The region presents a clear opportunity to develop and demonstrate capabilities, particularly in areas such as maritime security, undersea infrastructure protection, autonomous systems, and ISR, that are both operationally relevant and commercially exportable. As Arctic and sub-Arctic conditions become more strategically significant, demand for such capabilities is likely to increase among NATO allies and partner states, positioning the UK to play a leading role. Four out of ten respondents (41%) to the Overton Defence Sentiment Index believe the UK’s defence sector is growing strongly and will continue to grow over the next year.
However, this alignment is not yet being fully realised in practice. A key constraint is the gap between strategy and delivery. While industry confidence in defence sector growth and investment remains strong, domestic procurement and deployment have not consistently kept pace. This limits the UK’s ability to validate and showcase capability at home, which is often a prerequisite for export credibility in allied markets. The two most prominent demands from the respondents of the Overton Defence Sentiment index are for faster procurement cycles (55%) and multi-year funding commitments (60%), and the single largest constraint on growth in the sector is overly lengthy procurement timelines (53%).
There is also insufficient integration between defence policy, procurement, and export strategy. Capabilities developed for the High North are not always systematically linked to export pathways or supported through coordinated government engagement. This is particularly challenging for SMEs and dual-use firms, which often lead in innovation but face barriers in accessing defence frameworks and scaling internationally.
Greater alignment would require a more deliberate approach to using the High North as a platform for industrial growth. This includes faster procurement of emerging capabilities, clearer pathways from demonstration to deployment, and closer coordination between defence, trade, and industrial policy. If addressed, the High North could serve not only as a strategic priority for national security, but also as a proving ground for exportable UK capability and long-term sector growth.
7. Conclusion
The High North is no longer a peripheral concern. It is an emerging strategic theatre with direct implications for UK and NATO security.
The UK does not have a problem of strategy in the High North; it has twin problems of focus and delivery. Without faster procurement, sustained capability investment, and clearer operational prioritisation, the UK risks strategic overreach in a region where credibility depends on presence and capacity, rather than solely intent.