A British Battery Startup Just Got a Game-Changing Investor

Jan de Vries · 2026-08-14

When you think about the backbone of modern defense, batteries probably aren't the first thing that comes to mind. But they should be. A Coventry-based engineering firm, LORILLION, just landed a multi-million-dollar investment from SubSea Craft, a Portsmouth-based maritime technology company. The deal gives SubSea Craft a 40% stake in LORILLION, and it's a move that could reshape how the UK builds critical battery systems for defense, marine, and automotive use. This isn't just about money changing hands. It's about building a sovereign capability—the ability to design, industrialize, and manufacture specialist battery packs entirely within the UK. For an industry that often relies on overseas supply chains, that's a big deal. Let's break down what this partnership means and why it matters. ### Why This Investment Matters The UK has long been a leader in engineering and innovation, but when it comes to advanced battery systems, it's often had to look abroad. That's a vulnerability, especially in defense. SubSea Craft's investment is a direct response to that gap. By taking a 40% equity stake in LORILLION, they're not just buying a product—they're securing the engineering knowledge, manufacturing capability, and freedom of action needed to sustain strategically important British technology. Richie Frost, CEO of LORILLION, put it simply: "Our strategic partnership with SubSea Craft will accelerate the development of key battery technologies and a dedicated battery-pack manufacturing capability, enabling a vital end-to-end sovereign capability in the UK." That's not just corporate speak. It means LORILLION can now offer a complete route from initial concept through design, development, and testing, all the way to certified production. ### What LORILLION Brings to the Table Founded in 2023, LORILLION is young but already making waves. The company specializes in rapid development of bespoke battery systems for demanding, highly regulated applications. They work across defense, marine, aerospace, and automotive sectors, offering turnkey services that span everything from concept development to production. With this fresh capital, here's what LORILLION plans to do: - Expand its engineering team to over 70 people - Accelerate development of its proprietary battery-management technology - Support a new production facility in the Midlands, set to open next year That's a significant scaling up for a company that's only been around for a couple of years. It shows confidence in their technology and their team. ### The VICTA Connection SubSea Craft isn't just an investor—they're also a customer. Their advanced maritime platform, VICTA, is a dual-domain vessel capable of high-speed surface transit before transitioning to a wet, subsurface mode for covert operations. It's designed for militaries that need to deliver operators or equipment discreetly. For VICTA to work, it needs a battery system that can handle the pressure of operating at depths exceeding 165 feet. That's where LORILLION comes in. They're developing a bespoke pressure-tolerant battery system specifically for the vessel. It's a mission-critical component, not a commodity part. Camilla Martin, CEO of SubSea Craft, emphasized this point: "For VICTA, the battery is not a commodity component. It is a mission-critical system. Having a UK design and manufacturing partner working directly alongside our engineering teams will allow us to accelerate development, maintain control of performance and strengthen the resilience of our supply chain." ### A Strategic Shift for UK Defense This investment is part of a broader trend. Governments and companies are realizing that supply chains are fragile. Relying on foreign suppliers for critical technology is a risk. By building domestic capability, the UK is positioning itself to be more resilient and more self-sufficient. For SubSea Craft, this is about more than just securing batteries. It's about securing the freedom to act. As Martin noted, "Modern defence capability is only as resilient as the industrial base behind it." That's a powerful statement, and it's one that resonates far beyond the maritime sector. ### The Bottom Line This deal is a win-win. LORILLION gets the capital it needs to grow, and SubSea Craft gets a reliable, sovereign partner for its most critical component. It's a reminder that sometimes the most important investments aren't the flashiest—they're the ones that build the foundation for everything else. If you're watching the defense or battery technology space, this is a story worth following. The UK is betting big on its own capabilities, and companies like LORILLION and SubSea Craft are leading the charge.