Announcement PDF PDMR DEALING 23 October 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 in Cornwall, United Kingdom, makes the following announcement regarding the purchase of shares in the Company carried out by a PDMR of the Company. Following this purchase, Fawzi Hanano holds 180,000 shares representing 0.14% of the current share capital in the Company. The notification below, made in accordance with the requirements of the UK Market Abuse Regulation, provides further detail. 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Fawzi Hanano 2 Reason for the notification a) Position/status Chief Development Officer b) Initial notification /Amendment Initial notification 3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor a) Name Cornish Metals plc b) LEI 213800VU7WVFF4BJFY96 4 Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted a) Description of the financial instrument, type of instrument Ordinary shares Identification code GB00BSLNG492 b) Nature of the transaction On-market share purchase c) Price(s) and volume(s) Price(s) Volume(s) 69.3 pence 55,000 d) Aggregated information - Aggregated volume 55,000 - Price 69.3 pence e) Date of the transaction 22 October 2025 f) Place of the transaction London Stock Exchange, AIM Market 2 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/PdV8ae For additional information please contact: Cornish Metals Fawzi Hanano Emily Allhusen investors@cornishmetals.com info@cornishmetals.com Tel: +44 1209 715 777 SP Angel 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 Said Izagaren cornishmetals@blytheray.com Tel: +44 207 138 3204