The United Kingdom’s ambitions to secure a domestic supply of critical minerals have received a significant boost following the announcement of a £43 million investment pledge aimed at scaling lithium extraction in Cornwall. The investment, led by Geothermal Engineering Limited (GEL), is set to support more than 100 high-skilled jobs in the region and marks a pivotal moment in the nation’s transition toward a self-sustaining green energy economy.
Central to this financial package is an "Offer in Principle" worth nearly £10 million from the British government’s DRIVE35 Automotive Transformation Fund. This state backing underscores the strategic importance of Cornish lithium to the UK’s automotive sector, particularly as the global race to secure battery materials intensifies. The news comes during a landmark month for the domestic car industry, which has seen more than £1 billion in secured investment, signaling a robust period of growth and industrial restructuring.
The investment is specifically targeted at the United Downs site, located near Redruth. This facility, which commenced operations in February 2026, represents a frontier in sustainable resource management by producing geothermal electricity and lithium carbonate simultaneously. By utilizing the natural heat and mineral-rich waters found deep beneath the Cornish landscape, GEL is demonstrating a co-production model that could serve as a blueprint for future industrial projects worldwide.
UK Business Secretary Jonathan Reynolds hailed the development as a cornerstone of the country’s broader industrial strategy. Speaking on the announcement, Reynolds noted that the investment follows closely on the heels of the significant automotive capital secured earlier this month. He described the move as a "big step towards building our industrial resilience," emphasizing that domestic mineral security is no longer just an environmental goal but a national economic necessity.
The primary driver behind the surging interest in lithium is the exponential rise in demand for electric vehicles (EVs). Lithium is a foundational component of the high-capacity batteries that power modern EVs, and as the global transition away from internal combustion engines accelerates, the pressure on global supply chains has reached unprecedented levels. Market analysts and industry experts forecast that the demand for lithium will increase by a staggering 1,100% by 2035. For the UK, which is home to a major automotive manufacturing base, securing a "home-grown" source of this "white gold" is essential to protecting thousands of manufacturing jobs and ensuring the long-term viability of its car plants.
The United Downs facility is currently producing approximately 100 tonnes of lithium carbonate per year alongside its geothermal power output. However, the newly pledged £43 million investment is designed to facilitate a rapid scaling of these operations. The roadmap for the site aims to increase production to approximately 1,500 tonnes per year by 2029. While this represents a significant increase in output, it is part of a much larger vision for Cornwall, which is rapidly transforming into a centralized hub for lithium extraction and processing.
Cornwall’s unique geology, characterized by heat-generating granite, makes it one of the few places in Europe where both geothermal energy and lithium extraction are commercially viable in tandem. The region is currently playing host to two major lithium projects that utilize different technological approaches to reach the same goal. While GEL’s operation at United Downs focuses on scaling geothermal lithium extraction—pulling the mineral from hot, deep-seated underground waters—another major project, Trelavour, is pursuing a different path.
The Trelavour project, which was a subject of parliamentary discussion as recently as May, is currently in its pre-planning stages. Unlike the United Downs site, Trelavour intends to extract lithium directly from the region’s granite rock. Evidence presented to Parliament suggests that the scale of the Trelavour operation could be transformative for the UK’s mineral independence. Cornish Lithium, the company behind Trelavour, expects to produce 10,000 tonnes of lithium per year once the site is fully operational. Construction at Trelavour is currently slated to begin in 2028.
When combined, these Cornish projects represent a formidable portion of the UK’s future mineral requirements. It is estimated that the 10,000 tonnes per year projected from Trelavour alone could meet roughly 20% of the UK’s total lithium production target for 2035. When added to the scaled-up production from GEL’s United Downs site and other potential satellite operations, Cornwall is positioned to become the engine room of the UK’s battery supply chain.
The environmental benefits of the geothermal extraction method used at United Downs are a key factor in the government’s decision to provide funding through the Automotive Transformation Fund. Traditional lithium mining, often associated with vast evaporation ponds in South America or intensive hard-rock mining in Australia, can have a significant environmental footprint. In contrast, the geothermal method used in Cornwall is relatively low-impact. By extracting lithium from the brine that is already being pumped to the surface for heat and power generation, the process maximizes resource efficiency and minimizes land use.
This synergy between renewable energy and mineral extraction is a critical component of the UK’s "green industrial revolution." The ability to produce the raw materials for EV batteries using the very renewable energy that those vehicles aim to promote creates a virtuous cycle of sustainability. This aligns with broader scientific efforts within the industry to refine the "green recipe" for the entire lifecycle of lithium-ion batteries, from sustainable extraction to innovative recycling methods.
The creation of more than 100 jobs at the United Downs site is also a major win for the local economy in Redruth and the wider Cornwall area. These roles are expected to span a variety of sectors, including chemical engineering, site management, geological research, and high-tech maintenance. The influx of investment is seen as a way to revitalize a region with a deep-seated mining heritage, transitioning from the tin and copper mines of the 19th and 20th centuries to the high-tech mineral extraction of the 21st.
The DRIVE35 Automotive Transformation Fund, which provided the £10 million "Offer in Principle," is a dedicated government program designed to support the late-stage R&D and industrialization of a high-value UK electrified automotive supply chain. By de-risking large-scale private investments like the one from GEL, the fund helps ensure that the UK remains a competitive destination for automotive manufacturers who are increasingly looking for localized supply chains to reduce logistics costs and carbon footprints.
As the United Downs site moves toward its 2029 production goal of 1,500 tonnes, the focus will remain on the technical challenges of scaling geothermal extraction. While the technology has been proven at the current output of 100 tonnes per year, the jump to 1,500 tonnes requires significant infrastructure expansion and the refinement of chemical processing techniques to ensure the lithium carbonate produced meets the high-purity standards required by battery manufacturers.
The broader context of this investment cannot be overstated. With global geopolitical shifts making international supply chains more volatile, the concept of "industrial resilience" has become a priority for the UK government. By fostering a domestic lithium industry in Cornwall, the UK is taking proactive steps to shield its automotive sector from potential supply shocks and price volatility in the global minerals market.
The timeline for these developments suggests a decade of intense activity for the Cornish mining sector. With United Downs already operational and looking to scale, and Trelavour expected to break ground in 2028, the next few years will be critical in determining whether the UK can meet its ambitious 2035 production targets. The success of these projects will likely influence future government policy regarding mineral rights, environmental regulations, and further industrial subsidies for the green sector.
For now, the £43 million investment into GEL serves as a clear signal of confidence in Cornwall’s geological potential and the UK’s ability to innovate within the green energy space. As the demand for electric vehicles continues to climb, the quiet corner of United Downs near Redruth is set to play a noisy and vital role in the future of British industry.
