Maiden S-K 1300 Technical Summary Report Delivers 16% Increase in Open Pit Constrained Indicated Mineral Resources vs 2018 Scoping Study; Drilling Ongoing LONDON, UK / ACCESS Newswire / December 19, 2025 / Guardian Metal Resources plc ('Guardian Metal' or the 'Company') (LON:GMET)(OTCQB:GMTLF), a strategic exploration company focused on tungsten in Nevada, USA, is pleased to announce the submission to the SEC of a S-K 1300 Technical Summary Report ("TRS") and updated Mineral Resource Estimate ("Resource" or ...