Exploring the potential
of lithium in geothermal
waters
The deep underground waters at Besore near Threemilestone, Truro, were identified as having potential for lithium extraction. Consequently, exploration drilling and water testing were conducted at the site from November 2024 and completed in April 2025, with the site reinstated shortly after. The results from this project have provided data to add to our understanding of the subsurface in Cornwall.
UK Shared Prosperity Fund Project
This project is part-funded by the UK government through the UK Shared Prosperity Fund.
Frequently asked questions
The Besore area near Threemilstone, Truro was chosen as a promising site to explore for lithium in geothermal waters after reviewing historic mining data for the area, 3D modelling and intensive desk studies.
Following permissions, preparation at this site for the arrival of the drill rigs began in September 2024. Exploration drilling of both wells began at this site in November 2024 and completed in April 2025. Both sites were reinstated shortly after, and are now back to being used as agricultural fields.
The sites have now been reinstated and the exploration project is complete. There are currently no other plans at this site.
The Mineral Planning Authority at Cornwall Council provided temporary permission for exploration work, under the submission number PA24/05731 and permission was sought from the Environment Agency. The landowner and mineral rights owners also provided agreements for this work.
This project was part funded by the UK Government through the UK Shared Prosperity Fund.
