Announcement PDF APPOINTMENT OF NON-EXECUTIVE DIRECTOR 22 July 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 appointment of Andrew Quinn as an independent Non- Executive Director of the Company with effect from 22 July 2026. Andrew Quinn is a chartered engineer and former investment banking managing director with over 50 years’ experience across the global mining, metals and natural resources sector. He is a recognised industry leader in gold and precious metals governance, and brings extensive board, capital markets, M&A and responsible sourcing experience across companies listed in London and internationally. Mr Quinn currently serves as Non-Executive Chairman of Alkane Resources Ltd, an ASX-listed gold producer with operations in Australia and Sweden. He has previously served as a Non-Executive Director of Barrick Mining Corporation, one of the world’s largest gold and copper producers, and of the London Bullion Market Association (LBMA), where he chaired the Remuneration Committee. Earlier in his career he was Senior Independent Director of FTSE 100-listed Randgold Resources, and held senior mining investment banking roles, lastly as head of Mining Investment Banking for Europe and Africa at CIBC World Markets for 15 years prior to his retirement, advising on a number of major global mining transactions. He holds an undergraduate degree in Mineral Exploitation (Mining Engineering) from Cardiff University, is a Member of the Institute of Materials, Minerals & Mining, and is a registered Chartered Engineer. In addition to being appointed to the Board as an independent Non-Executive Director, Mr Quinn will also be joining the Audit Committee with immediate effect. The appointment further strengthens the Board as Cornish Metals continues to advance the South Crofty tin project towards production. Patrick Anderson, Chairman of Cornish Metals, commented: “We are pleased to welcome Andrew to the Board, as we continue to strengthen the senior team. He has an exceptional depth of experience across the global mining and metals sector, and a strong track record in capital markets, governance and M&A. Andrew will provide a key role as the Company transitions from developer to the first primary producer of tin in Europe and North America.” Andrew Quinn, incoming Non-Executive Director, added: “I am delighted to be joining the Board of Cornish Metals at such an important stage in the Company’s development. South Crofty is a high-grade, strategically important critical minerals project, and I look forward to working with the Board and management team to help deliver its considerable potential for shareholders and for Cornwall.” The following disclosures are required regarding Andrew Quinn’s appointment pursuant to Schedule Two paragraph (g) of the AIM Rules for Companies (the "AIM Rules"). Andrew James Quinn (aged 72) is currently, or has during the past five years been, a director of the following companies: Current directorships and/or partnerships: Former directorships and/or partnerships (within the last five years): Alfred Mews Limited Alkane Resources Ltd Inside Track 2 LLP London Bullion Market Association (LBMA) Barrick Mining Corporation Libra Environmental LLP Inside Track 1 LLP Inside Track Productions LLP Mr. Quinn does not currently hold any shares in the Company. 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/ya21le For additional information please contact: Cornish Metals Fawzi Hanano Emily Allhusen investors@cornishmetals.com info@cornishmetals.com Tel: +44 1209 715 777 SPAngel Corporate Finance LLP (Nominated Adviser) Charlie Bouverat Adam Cowl Ewan Leggat Tel: +44 203 470 0470 Berenberg (Joint Broker) Jennifer Lee Ivan Briechle Tel: +44 20 3753 3040 Peel Hunt (Joint Broker) Ross Allister David McKeown Tel: +44 20 7418 8900 BlytheRay (Financial PR) Tim Blythe Megan Ray cornishmetals@blytheray.com Tel: +44 207 138 3204 Said Izagaren Image Attachments image1