Dr. Mark Thorpe appointed to the Board

About this update from Guardian Metal Resources Plc

21 May 2026 Guardian Metal Resources plc ('Guardian Metal' or the 'Company') Dr. Mark Thorpe appointed to the Board Guardian Metal Resources plc (NYSE.A: GMTL, LON:GMET, OTCQB:GMTLF), a strategic exploration company focused on tungsten in Nevada, USA, is pleased to announce that Dr. Mark Thorpe is to be appointed to the Board as an Independent Non-Executive Director, subject to completion of the required AIM due diligence process. Dr. Thorpe brings to Guardian Metal decades of experience as a senior mining executive. He is a sustainability specialist with more than 30 years of experience working for major mining companies, focussed on environmental, permitting and community engagement initiatives, across the global mining sector. His experience covers the entire mine life cycle from greenfield exploration through to mine closure and post-closure management, which makes him well qualified to support Guardian Metal as it advances its Nevada-based tungsten projects through key development phases and into production. He holds a Ph.D. in mine land rehabilitation from the University of Saskatchewan and was the Chair of the Board of Directors of the Canada Mining Innovation Council. Dr. Thorpe is replacing Mr. Mark Burnett, who steps down from his role as Non-Executive Director on 21 May 2026. The Board would like to thank Mark Burnett for his significant contribution as an original director of Guardian Metal and for helping to build the Company from a small private company into a notable dual-listed business in London and New York over the past five years. He steps down to focus on other business interests. J.T. Starzecki, Executive Chairman of Guardian Metal, commented:  "Dr. Mark Thorpe's appointment to the Board as Independent Non-Executive Director is an exciting and important step in Guardian Metal's evolution as we look to reshore U.S. mined tungsten supply for the first time in over a decade. Mark is widely recognised as a leader in his field, setting best practice industry standards for global mining companies in responsible mining, environmental, permitting and stakeholder relations. We are delighted to appoint someone of his calibre and welcome his leadership and expertise as we approach important development milestones to deliver on our strategy of establishing our tungsten projects as cornerstones of U.S. tungsten supply. "I would like to thank...

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