Cornish Lithium has announced a 50% increase in its JORC-compliant Mineral Resource for the Trelavour Lithium Project in Cornwall, following 12 months of additional drilling, sampling, testing, and modelling. The upgrade underpins plans to produce ~10,000 tonnes per year of battery-grade lithium hydroxide for at least 20 years and provides the platform for a Feasibility Study due by end-2025.
The updated Mineral Resource stands at 88.5 Mt @ 0.21% Li₂O (equivalent to 183.5 kt Li₂O or 454.5 kt LCE), comprising 63.0 Mt Measured & Indicated and 25.5 Mt Inferred—a 50% increase versus the 2022 estimate. The resource extends from surface within a former china clay pit, implying a very low strip ratio.
The update incorporates 18,616 m of Mineral Resource drilling (56 diamond, 88 RC holes), with more than 20,000 m completed across resource, exploration, and geotechnical programs. Cornish Lithium says the project is fully integrated, producing refined battery-grade lithium hydroxide domestically with no reliance on overseas refineries, utilising proprietary low-carbon processing technology now fully owned by the company.
CEO Jamie Airnes welcomed the milestone as “one more step” toward securing UK critical minerals, jobs, and industrial capacity, noting the upgrade’s role in supporting the Development Consent Order (DCO) application and the path to commercial production from 2029. Planned next steps include completing the Feasibility Study and advancing permitting to keep the project on its targeted timeline.
