Announcement PDF ASX:WCE ANNOUNCEMENT 28 October 2025 Silver specialist appointed to new Technical Advisory Board • David Lewis and Ian Stockton appointed to West Coast Silver’s newly formed Technical Advisory Board • Lewis: silver specialists with 20+ years in structurally controlled silver/gold systems; led 2023 grassroots discovery at Campbell-Crawford (Canada) • Appointments bolster structural targeting, drill optimisation and discovery at Elizabeth Hill West Coast Silver Limited (ASX: WCE) (West Coast Silver or the Company) is pleased to announce Mr David Lewis joins Mr Ian Stockton, from ERM Gobal, who is currently engaged in exploration role, to the Company’s newly-formed Technical Advisory Board, effective immediately. About David Lewis Mr David Lewis is a structural and exploration geologist with more than two decades of experience spanning Canada and international projects in Peru, Saudi Arabia, Greenland, the United States and Mali. His senior roles include First Cobalt Corp. (2017–2019) and Kuya Silver Corp. as Vice President Exploration (2021–2025), where he directed the reinterpretation and targeting that led to a new high-grade silver discovery at Campbell-Crawford in the historic Cobalt, Ontario mining camp - considered the district’s first in more than 50 years. Mr Lewis brings deep expertise in structurally controlled precious-metal systems, 3D geological modelling, drill targeting and project-scale structural synthesis. He holds a B.Sc. (Geological Sciences) from the University of Saskatchewan and an M.Sc. (Geology) from Laurentian University, and is a Professional Geoscientist (P.Geo) with Professional Geoscientists Ontario. About Ian Stockton Mr Ian Stockton has been engaged by the Company in an exploration management capacity and will join Mr David Lewis on West Coast Silver’s Technical Advisory Board, further strengthening the Company’s exploration and technical capability. Mr Stockton is an accomplished exploration geologist with more than 30 years’ experience and a track record of contributing to multiple discovery teams across Western Australia, NSW, and QLD as well as international roles in SE Asia, Eastern Europe and South America. He holds a B.Sc. (Geology) from the University of Canberra and is the APAC Geology Manager for the ERM Technical Mining Services Division, based in Perth. His core strengths include exploration Highlights targeting & Strategy, project Management and, integration of geology, geophysics & geochemistry data to sharpen target definition and prioritisation. Strategic Fit with Elizabeth Hill Lewis and Stockton will support West Coast Silver’s near-mine and district-scale programs at Elizabeth Hill by: • Refining structural controls on high-grade shoots and vein sets; • Optimising hole orientation and step-outs for current and follow-up diamond programs; and • Integrating geophysics, geochemistry and historical datasets into a coherent structural model to accelerate discovery along the Munni Munni corridor. Commenting on the appointment, Executive Chairman, Bruce Garlick said: “Adding David and Ian meaningfully deepens our technical bench. David’s recent success in delivering new high-grade silver discoveries in a mature district, paired with Ian’s decades of Australian and international discovery experience, gives us exactly the structural rigour and practical targeting we want embedded at Elizabeth Hill.” This ASX announcement has been authorised for release by the Board of Directors of West Coast Silver Limited. For further information, please contact: Bruce Garlick Executive Director West Coast Silver Limited E: info@westcoastsilver.com.au Dannika Warburton Investor & Media Relations E: westcoastsilver@investability.com.au Competent Person Statement The information in this announcement that relates to Exploration Results is based on information reviewed by Mr Max Nind who is a Member of the Australian Institute of Geoscientists. Mr Nind is a consultant to West Coast Silver and a full time employee of ERM Australia Consultants Pty Ltd. Mr Nind has sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration, and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the Joint Ore Reserves Committee (JORC) ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’, and a Specialist under the VALMIN Code 2015 Edition of the‘Australasian Code for Public Reporting of Technical Assessments and Valuations of Mineral Assets’. Mr Nind consents to the inclusion in the announcement of the matters based on this information and in the form and context in which it appears. Forward-Looking Statements Statements in this announcement which are not statements of historical facts, including but not limited to those relating to the proposed transaction, are forward-looking statements. These statements instead represent management’s current expectations, estimates and projections regarding future events. Although management believes the expectations reflected in such forward-looking statements are reasonable, forward-looking statements are based on the opinions, assumptions and estimates of management at the date the statements are made and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. Accordingly, investors are cautioned not to place undue reliance on such statements.