Tamar Minerals Plc is a mineral exploration and development company focused on the identification, evaluation, and advancement of critical metal assets, primarily high-grade tin and copper deposits in the South West of England. The company's core operations and services encompass the exploration and appraisal of historical base metal mining districts; the identification and acquisition of mineral rights and lease options; exploratory diamond drilling and underground mineral resource sampling programs; proprietary 3D geological modeling and historical mine archive digitisation covering over 300 legacy underground workings; and the management of legacy resource interests. Its primary project portfolio includes the Great Wheal Vor tin project located in Cornwall and the Devon Great Consols copper-arsenic project situated near Tavistock in Devon, alongside a 49% minority interest in the Specimen Hill copper-gold exploration project in Queensland, Australia.
Originally incorporated in 2004, the company is headquartered in Scorrier, Redruth, United Kingdom, and trades on the Aquis Stock Exchange under the ticker symbol TMR. The company has undergone significant strategic and operational transformations, completing a reverse takeover of Godolphin Exploration Limited in May 2025 that shifted its corporate focus from Australian precious metals to domestic UK critical minerals and prompted its name change from Tectonic Gold plc to Tamar Minerals Plc. In March 2026, the company completed a £2.04 million fundraising and acquisition package, consisting of a £1.7 million equity placing and subscription alongside the £350,000 acquisition of Godolphin Mining (UK) Limited to finance exploration activities and corporate operations. Subsequent operational milestones in 2026 include the launch of an extensive deep drilling program at the Great Wheal Vor project to test high-grade tin extensions at depth, supported by executive leadership appointments that established Dominic Claridge as Chief Executive Officer and transitioned Mark Thompson to Non-Executive Chairman.