Announcement PDF ASX:WCE ANNOUNCEMENT 24th July 2025 AMENDMENT TO ASX ANNOUNCEMENT West Coast Silver Limited (ASX: WCE) (‘West Coast Silver’ or the ‘Company’) advises that it has updated the announcement released on 21 July 2025 title “Significant Silver Fieldwork Assays from Elizabeth Hill”. The attached announcement has been amended to correct and align certain assay units and values, update a highlight result, and clarify data presentation. These changes include adjustments to copper and gold reporting units, rectification of a data alignment issue, and addition of datum references. 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 WEST COAST SILVER LIMITED ASX | WCE ACN: 155 472 834 REGISTERED OFFICE Level 2, 10 Ord Street West Perth, WA 6005 PO Box 1227, West Perth WA 6872, Australia info@westcoastsilver.com.au +61 8 9322 3383 westcoastsilver.com.au ASX:WCE ANNOUNCEMENT 24th July 2025 SIGNIFICANT SILVER FIELDWORK ASSAYS FROM ELIZABETH HILL Highlights • Silver assays of up to 490 g/t silver returned from float and rock chip sampling • Multiple samples also returned elevated copper (up to 0.42% Cu) and gold (up to 0.19 g/t Au) • Distribution of silver-rich float samples indicates potential for additional source areas to the north (~200-500m) and south (~200m) of the historic Elizabeth Hill high-grade silver mine • Follow up works have commenced on site including trenching and additional sampling works • Comprehensive near mine and regional exploration targeting study including definition of high priority targets nearing completion. West Coast Silver Limited (ASX: WCE) (‘West Coast Silver’ or the ‘Company’) is pleased to announce the results of its recently completed reconnaissance rock chip and float sampling program at its Elizabeth Hill Silver Project in Western Australia. The program, which involved the collection of 115 rock chip samples, has returned significant assay results, confirming the presence of anomalous silver, copper, and gold mineralisation in areas both north and south of the historic Elizabeth Hill high-grade silver mine. Notable assay results from the complete results which are detailed in Appendix A of the announcement include: • • • • • 25EW06-062: 490 g/t Ag, 0.03 g/t Au, 0.17% Cu; 25EW06-057: 316 g/t Ag, 0.19 g/t Au, 0.11% Cu; 25EW06-063: 276 g/t Ag, 0.13 g/t Au, 0.14% Cu; 25EW06-025: 179 g/t Ag, 0.42% Cu; and 25EW06-064: 178 g/t Ag, 0.1% Cu; Executive Chairman’s Bruce Garlick commented: “We are very pleased with the results from reconnaissance sampling program at Elizabeth Hill. The high-grade silver results demonstrate the significant potential for expanding the known mineralisation footprint around the historic silver mine.” WEST COAST SILVER LIMITED ASX | WCE ACN: 155 472 834 REGISTERED OFFICE Level 2, 10 Ord Street West Perth, WA 6005 PO Box 1227, West Perth WA 6872, Australia info@westcoastsilver.com.au +61 8 9322 3383 westcoastsilver.com.au ASX:WCE ANNOUNCEMENT 24th July 2025 Figure 1 – Location of float sample assay results north and south of the historic Elizabeth high grade silver mine These significant assay results—up to 490 g/t Ag, 0.19 g/t Au, and 0.42% Cu—occur in two key areas relative to the historic high-grade silver mine. A cluster of samples grading >100 g/t Ag are located over an area 200–500 m north of the mine, while an isolated sample (170 g/t Ag) lies ~200 m to the south. The results suggest potential for additional new mineralised source areas and are possibly related to the north-south trending Munni Munni fault system. Upcoming Works Following on from completion of its inaugural drilling campaign and building on its significant results including 21 metres at 1,047g/t Ag from 10 metres in 25WCDD001 the Company now has commenced a systematic approach to further exploring Elizabeth Hill and the surrounding areas. This includes: • • • Trenching, mapping, and additional rock chip sampling which has already commenced at site; Completion of near mine and regional targeting works including prioritisation of targets (estimated completion 3-4 weeks); and Development of follow-on drill campaigns to the inaugural campaign including consideration for air core, reverse circulation and additional diamond drilling. Lithium Joint Venture Update The Company wishes to update that it terminated its Lithium JV agreement with Alien Metals at the Pinderri Hills Project to align with the Company strategy as a silver focused explorer/developer. WEST COAST SILVER LIMITED ASX | WCE Page 2 ASX:WCE ANNOUNCEMENT 24th July 2025 The Elizabeth Hill Project Elizabeth Hill is one of Australia’s high-grade silver projects and has a proven production history outlined below: • High grades enabled low processing tonnes: 1.2Moz of silver was produced from just 16,830t of ore at a head grade of 2,194g/t (70.5 oz/t Ag)1 • Previous mining operation ceased in 2000: because of low silver prices (US$5)2 • Simplistic historical processing technique: native silver was recovered via low-cost gravity separation techniques • Untapped potential remains in ground with deposit open at depth and recent consolidation of land package offers potential to discover more Elizabeth Hill style deposits. • Tier 1 Mining Jurisdiction located on a mining lease with potential processing option at the nearby Radio Hill site. Figure 2 – Location of Project Combined Tenements Through the consolidation of the surrounding land packages into a single contiguous 180km 2 package significant exploration and growth potential exists both near mine and regionally. The land package holds a significant portion of the Munni Munni fault system which is considered prospective for Elizabeth Hill look-a-like silver deposits. 1 WAMEX Annual Report,1 April 2014 to 31 March 2015, Elizabeth Hill Silver Project, Global Strategic Metals NL, p16 2 www.kitco.com/charts/silver WEST COAST SILVER LIMITED ASX | WCE Page 3 ASX:WCE ANNOUNCEMENT 24th July 2025 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 Competent Person Statement The information in this report that relates to Exploration Results is based on information compiled by Mr Rob Mosig a Competent Person who is a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Mosig is a Director of West Coast Silver. Mr Mosig 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 ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’, and a Specialist under the 2015 Edition of the ‘Australasian Code for Public Reporting of technical assessments and valuations of mineral assets’. Mr Mosig consents to the inclusion in the report of the matters based on his 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. Cautionary Statement This document is confidential and may not be reproduced, redistributed or passed on, directly or indirectly. This document is neither a prospectus nor an offer to subscribe for fully paid ordinary shares. West Coast Silver and its directors, employees and consultants make no representations or warranty as to the accuracy, reliability or completeness of this document, and have no liability, including liability to any person by reason of negligence of, or contained in or derived from, or for any omissions from this document, except liability under statute that cannot be excluded. This document contains reference to certain targets and plans of West Coast Silver which may or may not be achieved. The performance of West Coast Silver may be influenced by a number of factors, uncertainties and contingencies, many of which are outside the control of the Company and its directors, staff and consultants. WEST COAST SILVER LIMITED ASX | WCE Page 4 ASX:WCE ANNOUNCEMENT 24th July 2025 Appendix A – Rock Chip/Float assay results 7669754 Sample Type Float Ag g/t 0.11 Pb ppm 153 Cu % 0.005 Zn ppm 182 Au g/t 0.01 487569 487558 487560 482763 482729 482802 7669767 7666615 7666660 7662997 7663103 7661802 Outcrop Float Subcrop Subcrop Outcrop Outcrop 0.05 0.04 3.37 0.08 0.18 0.22 31 0.9 7.7 1.7 3.9 2.2 0.003 0.005 3.25 0.033 0.032 0.014 49 63 230 43 46 52 0.01 0.01 0.03 0.005 0.005 0.005 25EW03-010 25EW03-011 25EW03-012 25EW03-013 25EW03-014 25EW03-015 481300 482296 482212 482467 482148 482222 7662500 7663790 7663598 7664114 7663888 7663200 Float Outcrop Outcrop Float Float Float 0.04 0.06 0.21 0.28 2.61 0.02 1 2.2 4.4 3.7 0.25 0.5 0.001 0.012 0.038 0.045 0.029 0.002 1 47 35 47 5 8 0.005 0.005 0.005 0.01 0.01 0.005 25EW03-016 25EW03-017 25EW03-018 25EW03-019 25EW03-020 25EW03-021 482105 482220 482972 483903 483900 485297 7663416 7662899 7662401 7662098 7662181 7662397 Float Outcrop Outcrop Outcrop Outcrop Outcrop 0.03 0.09 0.09 0.15 0.11 0.12 0.25 6.5 26.3 2.6 5.7 5.4 0.002 0.016 0.019 0.033 0.02 0.014 7 40 53 104 35 37 0.01 0.005 0.01 0.01 0.005 0.005 25EW03-022 25EW03-023 25EW03-024 25EW03-025 25EW03-026 25EW03-027 484317 484286 483401 483487 484097 483283 7662211 7662896 7662702 7662369 7663109 7661867 Outcrop Outcrop Float Outcrop Outcrop Outcrop 0.01 0.01 0.1 0.02 0.07 0.48 1 0.5 13.4 1.1 1.8 4.5 0.003 0.001 0.001 0.006 0.008 0.041 24 8 4 31 94 216 0.005 0.005 0.005 0.005 0.005 0.005 25EW03-028 25EW03-029 25EW03-030 25EW03-031 25EW03-032 25EW03-033 483286 483286 483330 485800 485723 486038 7661845 7661981 7661909 7663556 7663873 7663878 Outcrop Outcrop Outcrop Outcrop Outcrop Outcrop 0.2 0.02 0.08 0.12 0.05 0.15 1.9 8 13.1 7.9 2.9 3.6 0.045 0.002 0.003 0.024 0.009 0.021 118 9 35 66 39 67 0.005 0.01 0.01 0.01 0.005 0.01 25EW03-034 25EW03-035 25EW03-036 25EW03-037 25EW03-038 25EW03-039 487558 486086 485760 485767 485562 486123 7664918 7664230 7664359 7664697 7664762 7664126 Outcrop Outcrop Outcrop Outcrop Outcrop Outcrop 0.12 0.27 0.05 0.11 0.04 0.69 94.3 4.5 3.4 9 11.8 2.9 0.001 0.054 0.011 0.017 10.002 0.116 125 30 73 34 93 80 0.005 0.01 0.01 0.01 0.005 0.04 25EW03-040 25EW03-041 25EW03-042 25EW03-043 486133 487897 486529 486596 7664281 7666674 7667805 7667719 Float Outcrop Outcrop Float 4.67 0.02 0.02 0.11 8.1 0.6 8.4 19.5 1.17 0.001 0.001 0.004 79 5 2 14 1.53 0.01 0.005 0.01 Sample_No Easting_m Northing_m GDA94z50 GDA94z50 25EW03-001 487575 25EW03-002 25EW03-003 25EW03-004 25EW03-005 25EW03-006 25EW03-009 WEST COAST SILVER LIMITED ASX | WCE Page 5 ASX:WCE ANNOUNCEMENT 24th July 2025 7669402 7671069 7671059 7670438 7670682 7667660 Sample Type Float Outcrop Outcrop Outcrop Outcrop Outcrop Ag g/t 2.94 0.03 0.01 0.02 0.01 0.03 Pb ppm 10 1.1 0.5 0.9 1.1 3.5 Cu % 0.142 0.005 0.000 0.23 0.000 0.000 Zn ppm 1715 2 5 61 1 1 Au g/t 0.01 0.01 0.005 0.01 0.01 0.005 484525 480776 480776 480650 480222 480227 7663210 7664457 7664458 7664483 7664591 7664588 Outcrop Outcrop Outcrop Outcrop Outcrop Outcrop 0.1 0.13 0.14 0.11 0.04 0.04 3.6 2.4 2.3 2.6 2.7 0.9 0.025 0.023 0.025 0.019 0.006 0.007 99 63 64 73 72 64 0.01 0.005 0.01 0.01 0.005 0.005 25EW06-007 25EW06-008 25EW06-009 25EW06-010 25EW06-011 25EW06-012 480168 480161 480162 480040 480241 480202 7664393 7664405 7664395 7664258 7663818 7663759 Float Float Subcrop Float Outcrop Outcrop 0.14 0.02 0.11 2.33 0.08 0.05 5.6 1.9 5 5 13 0.6 0.094 0.002 0.065 0.586 0.011 0.016 92 3 75 76 67 73 0.005 0.005 0.005 0.24 0.01 0.005 25EW06-013 25EW06-014 25EW06-015 25EW06-016 25EW06-017 25EW06-018 480185 488201 488203 488194 489123 489081 7663831 7667842 7667846 7667892 7667641 7667549 Outcrop Outcrop Outcrop Outcrop Float Outcrop 0.05 0.15 0.02 0.01 0.02 0.19 0.8 105 8.8 0.25 0.6 40.5 0.015 0.010 0.001 0.001 0.008 0.001 74 12 5 3 3 65 0.005 0.005 0.01 0.01 0.005 0.005 25EW06-019 25EW06-020 25EW06-021 25EW06-022 25EW06-023 25EW06-024 489091 487263 487886 486539 487141 487100 7667500 7668276 7668774 7669191 7667929 7667886 Outcrop Outcrop Outcrop Float Outcrop Float 0.01 0.18 0.74 0.04 0.33 0.84 0.6 16.5 115.5 49.3 23.2 18.5 0.000 0.001 0.031 0.001 0.003 0.099 13 48 1 14 28 74 0.005 0.01 0.005 0.005 0.01 0.01 25EW06-025 25EW06-026 25EW06-027 25EW06-028 25EW06-029 25EW06-030 486946 487001 487645 487690 486709 487067 7667666 7667706 7666719 7666478 7667414 7667695 Float Float Outcrop Outcrop Subcrop Float 179 0.65 0.32 1.48 0.94 11.85 418 37.4 13.5 18.6 13.6 147 0.423 0.722 0.035 0.284 0.274 0.056 284 31 68 77 25 346 0.02 0.03 0.01 0.02 0.02 0.01 25EW06-031 25EW06-032 25EW06-033 25EW06-034 25EW06-035 25EW06-036 487067 487031 486950 486698 486695 486677 7667695 7667677 7667625 7667508 7667498 7667493 Float Float Float Float Float Float 26.4 0.04 1.08 6.16 0.12 2.6 191.5 1.2 17.6 14.9 33.9 11.4 0.007 0.006 0.001 1.805 0.002 0.997 106 63 7 42 7 123 0.01 0.01 0.01 0.02 0.005 0.01 25EW06-037 486655 7667491 Subcrop 0.49 11 0.398 206 0.01 Sample_No Easting_m Northing_m GDA94z50 GDA94z50 25EW03-044 25EW03-045 25EW03-046 25EW03-047 25EW03-048 25EW03-049 487697 487715 487717 487880 487862 487547 25EW06-001 25EW06-002 25EW06-003 25EW06-004 25EW06-005 25EW06-006 WEST COAST SILVER LIMITED ASX | WCE Page 6 ASX:WCE ANNOUNCEMENT 24th July 2025 7667485 7667401 7667865 7667800 7667563 7667563 Sample Type Outcrop Float Float Outcrop Float Float Ag g/t 8.42 0.39 0.49 0.29 0.92 2.26 Pb ppm 84.6 5.6 22.7 3.9 13 36.4 Cu % 0.164 0.265 0.086 0.070 2.05 1.265 Zn ppm 11 22 89 79 96 57 Au g/t 0.02 0.3 0.01 0.005 0.05 0.01 487060 486962 486967 486948 486942 486964 7667670 7667776 7667735 7667799 7667737 7667737 Float Float Float Float Float Float 0.03 24.5 0.26 33 4.28 0.27 1.4 57.4 309 960 144.5 42.1 0.009 0.002 0.039 0.079 0.004 0.243 64 18 19 89 33 363 0.01 0.01 0.005 0.005 0.005 0.005 25EW06-050 25EW06-051 25EW06-052 25EW06-053 25EW06-054 25EW06-055 486687 486942 486943 486953 487047 487003 7667457 7667735 7667738 7667794 7668141 7668178 Outcrop Outcrop Outcrop Float Float Float 0.22 0.98 7.38 0.61 11.05 73.9 232 139 325 22.7 184.5 3280 0.102 0.003 0.005 0.175 0.057 0.170 708 20 90 129 117 480 0.005 0.005 0.005 0.01 0.005 0.08 25EW06-056 25EW06-057 25EW06-058 25EW06-059 25EW06-060 25EW06-061 487009 486981 487070 486662 486661 487093 7668093 7668042 7668157 7667520 7667511 7668064 Float Float Float Float Subcrop Subcrop 131 316 7.82 2.8 14 112 1610 1245 162.5 23 6.1 650 0.388 0.108 0.021 0.019 3.80 0.255 565 227 170 5 175 99 0.02 0.19 0.01 0.005 0.03 0.02 25EW06-062 25EW06-063 25EW06-064 25EW06-065 25EW06-066 25EW06-067 487071 486985 487117 487151 487167 487153 7668057 7668386 7668272 7668141 7668318 7668280 Float Float Float Float Float Float 490 276 178 7.84 0.18 33.5 1680 574 219 226 151.5 1365 0.174 0.144 0.095 0.002 0.004 0.211 367 348 122 36 56 639 0.03 0.13 0.02 0.01 0.005 0.01 25EW06-068 487195 7668266 Float 74.4 264 0.080 112 0.04 Sample_No Easting_m Northing_m GDA94z50 GDA94z50 25EW06-038 25EW06-039 25EW06-040 25EW06-041 25EW06-042 25EW06-043 486599 486537 486127 486293 486403 486501 25EW06-044 25EW06-045 25EW06-046 25EW06-047 25EW06-048 25EW06-049 WEST COAST SILVER LIMITED ASX | WCE Page 7 ASX:WCE ANNOUNCEMENT 24th July 2025 Appendix 3 JORC Code, 2012 – Table 1 Section 1 Sampling Techniques and Data – Elizabeth Hill Inaugural Drill Program (Criteria in this section apply to all succeeding sections.) Criteria JORC Code explanation Commentary Criteria • JORC Code explanation • Commentary Sampling techniques • Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases, more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information. • • • • • • • • • Drilling techniques • Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). WEST COAST SILVER LIMITED ASX | WCE • Page 8 Samples referred to in this report are rock chips samples obtained from in-situ, subcrop, and float collected by West Coast Silver during field reconnaissance exercises. Rock chip samples collected were selected based on pXRF scans and field observations recognising potentially mineralised rocks Samples are collected from around historic reported gossan locations, Ag soil anomalies, and samples collected while doing regional soil sampling program. Rock chip sample weight was between 0.15kg and 3.6kg Rock chips samples are subject to bias and often unrepresentative for the typical widths and assay grades required for economic consideration. They are by nature difficult to duplicate with any acceptable form of precision or accuracy. Samples were bagged and submitted to ALS Perth for preparation to a fine pulp (85% <75 µm). From that pulp, a 50 g charge was taken for fire assay (Au-AA26) and a 250 mg aliquot for four-acid digestion/ICP-MS–AES multi-element analysis (ME-MS61), ensuring a homogeneous pulp suitable for both high-precision Au assays and ultra-trace multi-element determination. Not applicable as no drilling was undertaken ASX:WCE ANNOUNCEMENT 24th July 2025 Criteria Drill sample recovery JORC Code explanation • • Logging • • • Subsampling techniques and sample preparation • • • • • • Commentary Method of recording and assessing core and chip sample recoveries and results assessed. Measures taken to maximise sample recovery and ensure representative nature of the samples. Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. • Not applicable as no drilling was undertaken Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. The total length and percentage of the relevant intersections logged. • Sampling was undertaken with a Vanta Olympus XRF at an ambient temperature of 27-32 °C Logging and field observations of rock chips are collected using Fulcrum App which has been set up for project geology requirements. Data recorded includes GPS location, lithology, mineralisation, alteration, structure. All data is captured using field note pad – Samsung Active-3. The level of logging detail is sufficient for exploration reconnaissance purposes If core, whether cut or sawn and whether quarter, half or all core taken. If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. For all sample types, the nature, quality and appropriateness of the sample preparation technique. Quality control procedures adopted for all subsampling stages to maximise representivity of samples. Measures taken to ensure that the sampling is representative of the in-situ material collected, including for instance results for field duplicate/second-half sampling. Whether sample sizes are appropriate to the grain size of the material being sampled. • • • • • • • • WEST COAST SILVER LIMITED ASX | WCE Page 9 No field sub-sampling of rock-chip samples was undertaken as part of this program; any single sample exceeding 3 kg was coarsecrushed and riffle-split by the laboratory to a 3 kg subsample for pulverisation (PUL-25a), with the remaining material retained as rejects. Sample Prep: Coarse Crush, ALS method CRU21- entire sample is crushed to >70% passing 2mm screen; Riffle Split (if > 3 kg): any material above 3 kg is riffle‐split down to a 3 kg sub‐sample, with the coarse rejects retained; Fine Crush, ALS method PU25a – pulverise up to 3 kg of crushed material > 85% passing 75µm screen. This follows standard industry practice for rock‐chip preparation and produces a homogeneous pulp for a 50 g fire assay (Au) charge and a four-acid digestion for a 48‐element multi-element suite. All crushing and pulverising steps are subject to ALS’s NATA‐accredited QC checks (85% < 75 µm fineness confirmed by sieve), with pulps routinely checked at a frequency of at least 1:40 samples. ASX:WCE ANNOUNCEMENT 24th July 2025 Criteria JORC Code explanation Quality of assay data and laboratory tests • • • Commentary The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. Nature of quality control procedures adopted (e.g., standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e., lack of bias) and precision have been established. • • • • Verification sampling assaying of and • • • • The verification of significant intersections by either independent or alternative company personnel. The use of twinned holes. Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. Discuss any adjustment to assay data. • • • • • • WEST COAST SILVER LIMITED ASX | WCE Page 10 Rock‐chip samples were dispatched to ALS Global Laboratories in Perth for analysis. Gold was determined by 50 g fire assay with atomic absorption finish (Au-AA26), and a multi-element suite of 48 elements was measured by four-acid digestion with ICP-MS/ICPAES (ME-MS61). Samples exceeding the upper detection limit for Ag or Cu were re-analysed using the ore-grade four-acid digestion default method (ME-OG62). These techniques are considered “total” for the target elements, providing comprehensive dissolution of sulfides and oxides. Rock samples were collected from the prospects and scanned using Vanta Olympus XRF at an ambient temp of 27 to 32 °C on dry samples. The XRF uses the latest 2025 software and is calibrated daily against a CRM and a blank. Analysis method uses 3 beam analysis set to 10 sec per beam for 30 second read time. ALS Perth’s preparation and analytical workflows include internal standards, blanks, and duplicate analyses to monitor accuracy and precision. Control charts and QA/QC metrics are managed via their Webtrieve™ system under NATA accreditation. Although no company-supplied standards or blanks were submitted, ALS’s rigorous internal QC procedures ensure acceptable levels of bias (< ±2% for Au) and precision (relative standard deviation < 3% for most elements). Rock chip sample and geological information is recorded in the field with co-ordinates saved from in built tablet GPS and handheld GPS used in the field. All rock chip samples were inspected and described by West Coast Silver geologists in the field. Field data is entered into Fulcrum App before being loaded into a database. All data has been maintained, validated, and managed by administrative geologist. Analytical results received from the lab have been loaded directly into the database with no manual transcription of these results undertaken, Original lab certificates have been stored electronically. Below detection limit data presented as 1/2 of the lower detection limit of ASX:WCE ANNOUNCEMENT 24th July 2025 Criteria JORC Code explanation Commentary the method and over the detection limit results presented as the upper detection limit of the method Location of data points • • • Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. Specification of the grid system used. Quality and adequacy of topographic control. • • • Data spacing and distribution • • • Orientation of data in relation to geological structure • Sample security Audits or reviews • • • Data spacing for reporting of Exploration Results. Whether the data spacing, and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. Whether sample compositing has been applied. • Sample points were determined by in built tablet GPS and hand held GPS which is considered appropriate for the reconnaissance nature of the sampling. GPS error is approximately 1-5m for Easting & Northing and up to 10m for elevation (m) All sample location coordinates are provided in the Geocentric Datum of Australia (GDA94 Zone 50). Not applicable due to the reconnaissance nature of the sampling. No attempt has been made to demonstrate geological or grade continuity between sample points. No sample compositing is applied to samples • Samples were collected from predominantly outcropping in situ, & lessor subcrop and vein float material around historical soil anomalies and possible gossan locations. • Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. If the relationship between the drilling orientation and the orientation of key mineralized structures is considered to have introduced a sampling bias, this should be assessed and reported if material. The measures taken to ensure sample security. • Sample security is by way of chain of custody. • The results of any audits or reviews of sampling techniques and data. • No review of the sampling techniques has been undertaken. • WEST COAST SILVER LIMITED ASX | WCE Page 11 ASX:WCE ANNOUNCEMENT 24th July 2025 Section 2 Reporting of Exploration Results (Criteria listed in the preceding section also apply to this section.) Criteria Mineral tenement and land tenure status JORC Code explanation • • Exploration done by other parties • Commentary Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. • Acknowledgment and appraisal of exploration by other parties. • • • • • • Geology • Deposit type, geological setting and style of mineralisation. WEST COAST SILVER LIMITED ASX | WCE • Page 12 The Elizabeth Hill Project are is a Joint Venture between West Coast Silver and Alien Metals on a 70%/30% The results reported in this report come from sample collected on tenements M47/342, M47/126, M47/125, M47/124, M47/123, E47/4422, E47/3322, E47/3535, P47/2033, The tenements lie with in the Ngarluma Native Title Claim The Tenements are in good standing with DEMIRS and there are no known impediments for exploration on these tenements The Elizabeth Hill deposit and adjoining area has been explored for Ni, Cu, PGM, base metals, Li and Ag mineralisation since 1968 when US Steel International Inc explored the area for base metals and nickel. Massive silver was discovered in ~1994-1995 by Legend mining NL in a percussion hole drilling program. Further drilling followed and in 1997 and exploration shaft and drive was sunk by East Coast Minerals NL. Underground mining at Elizabet Hill was conducted in 1999-2000 with additional drilling completed by East Coast Minerals NL until the project was sold to Global Strategic Metals NL in 2012. Alien Metals Ltd purchased lease M47/342 in early 2020. The Elizabeth Hills silver mineralisation is structurally controlled and is located on the eastern boundary of the north-south trending Munni Munni Fault. Mineralisation has been intersected over a 100m north-south zone along the boundary of the Munni