RESULTS OF 2026 ANNUAL GENERAL MEETING

4 June 2026

Cornish Metals plc (AIM: TIN) (“Cornish Metals” or the “Company”), a mineral exploration and development company focused on advancing its wholly owned and permitted South Crofty tin project (“South Crofty”) in Cornwall, United Kingdom, is pleased to announce the results of its 2026 Annual General Meeting held on 4 June 2026 (the “Meeting”). A total of approximately 83.5 million ordinary shares of the Company were voted at the Meeting, representing approximately 66.5% of the issued and outstanding ordinary shares as at the record date of the Meeting.

Meeting Results

All resolutions were duly passed. The full text of the resolutions proposed at the Meeting is contained in the Notice of Annual General Meeting, which is available on the Company’s website.

The voting results of the business of the Meeting are summarised as follows:

Mr. Ken Armstrong

Ken Armstrong, who has served as a Board member of the Company for 20 years, did not stand for re-election to the Board. The Board wishes to record its sincere thanks to Ken for his significant contribution and the valuable insight he has provided during his tenure, and to extend its best wishes for the future.

ABOUT CORNISH METALS

Cornish Metals is a mineral exploration and development company that is advancing the South Crofty critical mineral project towards production. South Crofty:

• is a historical underground tin mine located in Cornwall, United Kingdom and benefits from existing mine infrastructure including multiple shafts that can be used for future operations;
• is the highest grade known tin Mineral Resource not in production with significant near-mine and regional Mineral Resource potential;
• is permitted to commence underground mining (valid to 2071), construct a new processing facility and for all necessary site infrastructure;
• is expected to produce approximately 4,700 tonnes of tin-in-concentrate annually in the first five years of full production at lowest-quartile all-in sustaining costs over an initial 14-year mine life;
• will be a low environmental impact underground mine with zero surface tailings;
• would be potentially the first primary producer of tin in Europe or North America. Tin is a Critical Mineral as defined by the UK, American, and Canadian governments as it is used in almost all electronic devices and electrical infrastructure. Approximately two-thirds of the tin mined today comes from China, Myanmar and Indonesia;
• benefits from strong local community, regional and national government support with a growing team of skilled people, local to Cornwall, and could generate over 300 direct jobs;
• is an opportunity for a secure domestic supply of tin in the UK supporting a low carbon economy.

ENDS

Engage with us directly at our investor hub. Sign up at: https://investors.cornishmetals.com/link/PZ2jEP

For additional information please contact: