SubSea Craft's Bold Battery Bet Could Redefine UK Defense Tech

Jan de Vries · 2026-08-14

Here's a story that shows how strategic investments can quietly reshape an entire industry. SubSea Craft, a Portsmouth-based maritime technology company, just made a multi-million-dollar move that's turning heads in defense and clean-energy circles. They've acquired a 40% stake in LORILLION, a Coventry-based engineering firm that specializes in bespoke electrification and clean-energy tech. This isn't just another funding round. It's a calculated play to strengthen the UK's ability to design, build, and manufacture specialized battery systems for defense, marine, and automotive applications. And the timing couldn't be more critical. ### Why This Investment Matters Now The defense sector is undergoing a massive shift toward electrification. From submarines to surveillance drones, everything needs reliable, high-performance power sources. But here's the catch: the UK has been heavily reliant on overseas suppliers for these mission-critical components. That's a vulnerability no nation wants. SubSea Craft's investment directly addresses this gap. By taking a significant equity stake in LORILLION, they're not just securing a supply chain—they're securing the engineering knowledge and manufacturing capability needed to keep strategically important British technology homegrown. Richie Frost, LORILLION's CEO, put it plainly: "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." ### What LORILLION Brings to the Table Founded in 2023, LORILLION might be young, but it's already punching well above its weight. The company provides battery development services across defense, marine, aerospace, and automotive sectors. Their specialty? Rapid development of bespoke battery systems for demanding, highly regulated applications. Here's what they offer: - Initial concept development and product design - Validation and certification for safety-critical use - Full-scale production capabilities - Turnkey solutions from idea to market-ready product With this fresh capital, LORILLION plans to expand its engineering team to over 70 people. They're also accelerating development of their proprietary battery-management technology and supporting a new production facility in the Midlands, slated to open next year. ### The VICTA Platform Connection Now, here's where things get really interesting. SubSea Craft's flagship product is the VICTA Class vessel—a dual-domain maritime platform that can zip across the surface at high speed, then transition to a wet, subsurface mode for covert operations. Think James Bond meets modern naval warfare. But here's the challenge: operating at depths exceeding 160 feet requires batteries that can withstand immense pressure. That's no small feat. LORILLION is now developing a bespoke pressure-tolerant battery system specifically for VICTA. This isn't a commodity component; it's a mission-critical system that could determine mission success or failure. ### A Strategic Vision Beyond Batteries Camilla Martin, SubSea Craft's CEO, summed up the philosophy behind this move: "Modern defense capability is only as resilient as the industrial base behind it. Our investment in LORILLION is about more than securing batteries. It's about securing the engineering knowledge, manufacturing capability, and freedom of action required to develop and sustain strategically important British technology." That's a powerful statement. In an era where global supply chains can be disrupted by geopolitics, pandemics, or natural disasters, having sovereign capability isn't just nice-to-have—it's essential. ### What This Means for the Industry For professionals watching the European startup and defense tech space, this deal sends a clear signal: vertical integration is back in vogue. Companies aren't just looking for suppliers; they're looking for partners who can grow with them and share the risk. It also highlights the growing importance of energy storage technology in defense. As militaries worldwide move toward electric and hybrid platforms, the ability to design and manufacture advanced battery systems will become a strategic advantage. For LORILLION, this investment provides the runway to scale. For SubSea Craft, it ensures they have a reliable, innovative partner for their most critical component. And for the UK, it's a step toward true industrial resilience in a rapidly changing world. The deal is a win-win-win—and a fascinating case study in how strategic investment can create value across an entire ecosystem.