The UK’s recent commitment to Small Modular Reactors (SMRs) – backed by up to £20bn (US$26.5bn) through June’s government spending review – marks a pivotal and highly encouraging shift in national energy and industrial policy.
This is more than a funding announcement; it represents a stage gate, signalling renewed confidence in nuclear as a cornerstone of the UK’s long-term energy future. It also reflects a broader recognition that nuclear power, built in a modular way, can play a critical role in achieving net-zero targets, enhancing energy security, and enhancing industry.
As the global energy landscape pivots toward decarbonisation and resilience, SMRs and Advanced Modular Reactors (AMRs) offer the UK a unique opportunity to reassert leadership in nuclear innovation. These technologies can help re-shore advanced manufacturing capabilities, stimulate regional economic development, and create tens of thousands of high-quality, long-term jobs. In doing so, a revitalised nuclear sector could become the backbone of a new industrial ecosystem – one that is clean, resilient, and globally competitive.
The strategic importance of SMRs
SMRs represent a transformative approach to nuclear deployment. By combining modular design principles with flexible manufacturing processes, they enable faster, more scalable, and cost-effective deployment compared to traditional large-scale nuclear plants.
The UK is uniquely positioned to become a global hub for SMR technology, particularly in areas such as modular construction, digital engineering, and advanced manufacturing techniques. While Rolls-Royce remains the only UK-based SMR developer, the government’s openness to foreign technology vendors – including Holtec, GE-Hitachi and others – signals a broader commitment to fostering a competitive and diverse nuclear ecosystem.
This approach not only encourages innovation but also ensures that the UK is not overly reliant on a single technology platform. Importantly, the flexible manufacturing methodologies being developed are not exclusive to SMRs; they can be adapted across AMRs and potentially even fusion systems, enhancing the UK’s strategic versatility and export potential.
Unlocking economies of scale
The UK possesses a foundational nuclear supply chain, but its current scale and capability are insufficient to meet the demands of a high-throughput SMR programme. A consistent, long-term policy framework is essential to incentivise investment and capacity expansion. Without clear visibility into future demand, suppliers are unlikely to commit to the capital-intensive upgrades required to support a new generation of nuclear deployment.
For the first time in decades, the UK has multiple active strands in civil nuclear: Sizewell C has final investment approval, Rolls-Royce’s SMR programme has received an initial commitment for three reactors, and fusion technology is emerging as a serious contender. However, to realise the benefits, SMR orders must scale into the double digits to justify the ramp-up in manufacturing capacity and unlock economies of scale.
These projects represent a pipeline of opportunity for a diverse range of companies from within the supply chain, from component manufacturers to those who specialise in digital engineering. But, beyond these flagship initiatives, future visibility remains limited. Suppliers are unlikely to commit to large-scale investments for projects that may not materialise for another decade. While modest capacity increases may be feasible, significant scaling demands a critical mass of orders and a clearly articulated roadmap encompassing SMRs, large-scale reactors, and fusion. Without this, the economic case for supply chain investment remains in question.
Consistency is key to supply chain success
The UK’s nuclear policy has historically been characterised by a stop-start approach, which has undermined confidence and continuity in the supply chain. To reverse this trend, a clear and predictable cadence of project announcements is needed. More important than fixed targets is the regularity of opportunity – a steady drumbeat of projects that allows suppliers to plan, invest, and grow with confidence.
A well-defined civil nuclear roadmap, underpinned by the government recommitting to the 24 GW target, must outline the next steps. This includes clarity on where Rolls-Royce SMRs will be built, how future awards will be structured, and what role international vendors will play. Modularisation holds significant promise, but its benefits will only be realised through optimisation and standardisation – both of which require long-term planning and coordination.
Innovation beyond technology
Innovation in the nuclear sector must extend beyond reactor design. Market structures, skills development, and regulatory frameworks all require modernisation. The UK can draw valuable lessons from sectors such as aerospace and automotive, in adopting lean manufacturing, digital integration, and supply chain agility.
Reducing design complexity and avoiding bespoke, one-off solutions will be critical to building a resilient and scalable supply chain. A dynamic, standardised approach to SMR deployment will enable broader participation and reduce barriers to entry for suppliers. When designs are standardised, significant time, cost, and design savings can be achieved.
This standardisation also fosters a more competitive and dynamic supplier environment. New entrants can more easily participate, offering more cost-effective solutions. In contrast, bespoke and highly complex designs tend to concentrate supply within a narrow group of providers, limiting flexibility and scalability.
Moreover, a coordinated approach to standardisation can expand the supply chain’s overall capacity without requiring each individual supplier to scale up independently. Simply broadening the pool of qualified suppliers increases national capacity and resilience. To fully realise this opportunity, the UK must prioritise not just technological innovation, but also systemic innovation in how nuclear projects are designed, procured, and delivered.
Regulatory reform as an enabler
The regulatory environment must evolve to support innovation while maintaining the highest safety standards. By collaborating more closely with industry and subject matter experts, the UK’s regulator’s pro-innovation stance can be realised. The British regulatory system, while robust, operates differently from many international counterparts, which can introduce delays, particularly when evaluating technologies not previously deployed in the UK.
For example, the UK has never built a boiling water reactor (BWR), which may have influenced the government’s decision to prioritise proven technologies like pressurised water reactors (PWRs) for early SMR deployment. While this de-risks delivery, it also highlights the need for more agile regulatory processes. GE Hitachi’s BWR-based SMR has already been approved in Canada – a country with a long-standing, highly qualified nuclear regulatory framework. This raises the question: if a design is approved by a credible international regulator, can the UK adopt a translational regulatory approach to accelerate its own approval process?
Efforts are underway to explore such harmonisation, but more must be done to formalise pathways for recognising international certifications and accepting components manufactured for use in other regulatory environments. This would not only reduce duplication but also enable a broader, more flexible supply chain.
Ultimately, reform should focus on enabling adaptive licensing processes, harmonising international standards, and facilitating the deployment of novel technologies without compromising safety. Bridging the gap between the regulator’s openness to innovation and the industry’s need for risk mitigation will require coordinated action across all stakeholders. A clear mechanism is needed to translate regulatory flexibility into tangible supply chain opportunities, ensuring that innovation is not just permitted, but actively enabled.
Looking ahead
The UK is now in a strong position, politically, financially, and technologically, to lead in the next generation of nuclear energy. With a clear commitment to SMRs and a growing appetite for innovation, the country has the tools to transform its energy landscape and industrial base.
This is a moment of strategic opportunity. With the right follow-through, clear policy signals, regulatory reform, and industrial coordination, the UK can not only meet its energy goals but also lay the foundation for a new era of economic and technological leadership.
