Cornish Tin & Lithium — formerly Cornish Tin Limited — has announced significant Phase 3 drilling results from its Tregonning project in west Cornwall, confirming that a lithium-bearing rock formation extends 3.27 kilometres from Tregonning North to Tregonning South while simultaneously intersecting a new high-grade tin mineralisation system containing ten lodes identified to date.
The Phase 3 programme, conducted between September 2025 and January 2026, was primarily designed to test lithium-enriched aplite-pegmatite sheets in the newly identified Tregonning South extension area. Results confirmed that the Newall Formation — a lithium-bearing geological unit first identified at Tregonning North, where earlier drilling returned intervals including 0.3 metres grading 1.33% lithium oxide with a peak grade of 1.42% — extends continuously across the full 3.27 kilometre strike length. Multiple lithium-bearing layers at different depths across the project area suggest the total resource potential may be larger than previously assessed.
The tin discovery at Tregonning South adds a second commodity dimension of significant scale. High-grade intersections include 2.69% tin in the Norcross No.1 Lode, 1.68% tin in Rib South Lode and 1.26% tin in Rib North Lode, alongside an associated sheeted vein system extending across the area.
To reflect the project’s dual-commodity evolution, the company has rebranded as Cornish Tin & Lithium. CEO and founder Sally Norcross-Webb said the name change underscored the company’s potential to become a leading domestic source of responsibly produced tin and lithium for electric vehicles, renewable energy systems and advanced electronics. “Tregonning South clearly has spectacular potential. Never before explored systematically, as a combined mining operation, our project areas in West Cornwall could make a very significant and positive contribution to Cornwall’s economy and the critical minerals resilience of the UK and Europe,” she said.
