Announcement PDF 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 11 November 2026 Elizabeth Hill Silver Resource Grows 20% to 3.36Moz; 77% in Indicated Category with further upside potential Watch CEO and Executive Director Sergei Smolonogov discuss today's results: https://westcoastsilver.com.au/link/eN1kly Highlights: • Updated JORC 2012 Mineral Resource of 3.36 Moz Ag at 446 g/t Ag in 234.7 kt (20 g/t Ag cut-off; 100% basis). • Contained silver up 20.3% (+568 koz) on the April 2026 MRE. • Mineral Resource tonnage increased 66.5% (+93.7 kt) to 234.7 kt. The inclusion of additional lower-grade material reduced the average silver grade by 27.7%, from 617 g/t Ag to 446 g/t Ag. • Resource confidence lifted with 2.59 Moz Ag (77%) of contained silver now at Indicated level of confidence, up from 369 koz (13%) in April 2026. • High-grade core contains approximately 95% of the reported silver. At a 60 g/t Ag sensitivity cut-off, the combined Indicated and Inferred Mineral Resource is 74.7 kt at 1,333 g/t Ag for 3.20 Moz Ag (Table 3). • Growth reflects a revised geological interpretation and updated estimation incorporating 2026 drilling. • Follow-up drilling1 to test extensions on the north-west of the mineralised system and at Elizabeth Hill Deeps has commenced, targeting potential resource growth. • Targeted infill drilling, geotechnical, engineering, metallurgy and scoping-level studies have commenced as the next technical priorities. West Coast Silver Limited (ASX: WCE) (‘West Coast Silver’ or the ‘Company’) announces an updated Mineral Resource Estimate (MRE) for its Elizabeth Hill Silver Project, located south of Karratha in Western Australia. The estimate was prepared by Dmitry Pertel, MAIG, in accordance with the JORC Code (2012). 1 Refer ASX Announcement “Diamond Drilling to Follow-Up Elizabeth Hill Silver Growth” dated 29 September 2026 ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 2 The updated estimate provides a materially increased silver inventory and a substantially greater proportion of Indicated Mineral Resources, establishing a stronger technical basis for further exploration and development evaluation2 . Commenting on the updated MRE, Chief Executive Officer Sergei Smolonogov said: “The updated Elizabeth Hill Resource estimate is a significant milestone for West Coast Silver, with the Elizabeth Hill silver system increasing to 3.36 million ounces of silver, with approximately 77% of contained silver now classified as Indicated. The increased level of confidence supports West Coast Silver advancing to a Scoping Study that will provide shareholders and the market the first snapshot of potential Project economics and development options. West Coast Silver has already commenced metallurgical, geotechnical and engineering studies that will be part of the baseline of the Scoping-level assessment. The new MRE block model highlights not only existing growth, but areas for further potential mineralisation expansion. The north-west extension is included in the updated Mineral Resource as Inferred, and follow-up drilling is underway to test its continuity and extent. Elizabeth Hill Deeps remains unclassified and is excluded from the current estimate. Follow-up drilling has also commenced at Deeps to assess its potential for future resource growth. We aim to further improve resource confidence and add silver ounces, with a further MRE update targeted for March 2027 ahead of the maiden Elizabeth Hill Scoping Study.” Mineral Resource Estimate Grows 20% to 3.36Moz The updated Mineral Resource totals 234.7 kt at 446 g/t Ag for 3.36 Moz of contained silver at a 20 g/t Ag reporting cut-off (100% basis). The estimate is constrained by a conceptual open-pit shell and depleted for historically mined underground workings and stopes. The resource is reported on a dry-tonnage basis3 . Table 1. Elizabeth Hill Mineral Resource Estimate at a > 20 g/t Ag cut-off grade. JORC classification Tonnes (kt) Ag grade (g/t) Contained Ag (koz) Indicated 195.9 411 2,587 Inferred 38.8 622 776 TOTAL 234.7 446 3,363 Notes: (1) Mineral Resources are classified according to JORC 2012. (2) Open-pit constrained above 20 g/t Ag and depleted for historical stopes and development. (3) No Measured Mineral Resource or Ore Reserve is reported. (4) Competent Person: Dmitry Pertel, MAIG. (5) Small discrepancies can occur through rounding. (6) Figures are reported on a 100% basis; WCE holds a 70% interest in M47/342 (see Ownership and attributable metal). Resource Growth and Increased Geological Confidence The updated MRE increases contained silver by approximately 568 koz, or 20.3%, from the April 2026 estimate of 2.795 Moz. The resource tonnage rises by approximately 93.7 kt (+66.5%). Average grade declines from 617 g/t Ag to 446g/t Ag,reflecting theinclusion of lower-grademineralised material within 2 The estimate is not an Ore Reserve and does not demonstrate economic viability. 3 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 3 the revised interpretation. Material grading 20 to 30 g/t Ag accounts for most of the additional tonnes but only around 76 koz of contained silver. At a 30 g/t Ag cut-off the model reports 140.9 kt at 726 g/t Ag for 3.29 Moz (Table 3). Increased geological confidence is reflected in the increase in Indicated resources from 13% in April 2026 to 77% in November 2026. The Indicated resource represents mineralisation and geology drilled on a tight spacing of ~5m x 5m. The close-spaced drilling provides grade continuity in a mineralised system where resource estimation statistics indicate there is high variability. The silver nugget effect is close to 50% of the total sill in semi-variograms. At this Indicated resource definition spacing, there is sufficient confidence to assume geological and grade continuity4 . Table 2. Comparison with the published April 2026 Mineral Resource Metric April 2026 MRE Updated MRE Change Total resource (kt) 141.0 234.7 +66.5% Ag grade (g/t) 617 446 −27.7% Contained Ag (Moz) 2.795 3.363 +20.3% / +568 koz Indicated Ag (Moz) 0.369 2.587 +2.218 Moz Indicated share of ounces 13.2% 76.9% +63.7 pp Inferred Ag (Moz) 2.426 0.776 −1.650 Moz April 2026 comparator: West Coast Silver ASX announcement, 22 April 2026, 20 g/t Ag cut-off. The Indicated Mineral Resource category increase is mostly a resource-classification change and is not in itself an increase in total contained metal. Figure 1. Indicated and Inferred contained silver, April 2026 versus updated MRE (Moz)5. The increase in Indicated Mineral Resources reflects improved confidence in the Mineral Resource estimate and reduced geological and resource estimation risk. 4 Source: Dmitry Pertel’s internal November 2026 Elizabeth Hill technical report. 5 Refer WCE ASX Announcement “Elizabeth Hill - 2.8Moz Silver Mineral Resource Estimate”dated 22 April 2026 0.369 2.587 2.426 0.776 2.795 Moz 3.363 Moz 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 April 2026 MRE November 2026 MRE Contained Silver (Moz) Indicated Inferred 77% 23% 87% (13%) ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 4 High-Grade Core Within a Larger Resource The silver resource comprises a high-grade lower tonnage core (95% of ounces within 74.7 kt grading 1,333 g/t Ag at a 60 g/t Ag sensitivity cut-off (Table 3) surrounded by a lower grade larger tonnage. This grade-tonnage configuration provides optionality in assessing potential development pathways. The lower grade, larger tonnage sits around a higher grade, lower tonnage centre. This may increase the range of options available for technical assessment, but it does not establish mine life, processing rates, recoveries or project value. Importantly, the updated Mineral Resource has been reported using consistent pit optimisation assumptions to the April 2026 estimate, providing a comparable economic basis for assessing the 20% increase in contained silver. The difference could be explained by the updated modelling techniques (implicit that was used by ERM vs explicit manual interpretation), and additional drilling that was completed between April and September 2026. The updated Mineral Resource Estimate incorporated 46 additional drillholes (4,728 m) and 3,952 additional silver assays. Geotechnical and engineering studies are in progress for Elizabeth Hill specific pit slope parameters that will optimise future pit designs constraining MREs. Figure 2. Changes in reported resource tonnage and weighted silver grade at a 20 g/t Ag cut-off. Drop in grade attributable to increased lower grade tonnes at >20g/t Ag. Silver grades remain high with 95.2% of ounces within 74.7kt grading 1,333 g/t Ag at >60g/t Ag cut-off. 141.0 234.7 0.0 50.0 100.0 150.0 200.0 250.0 April 2026 MRE November 2026 MRE kt Resource Tonnes (+66.5%) 617.0 445.6 0.0 100.0 200.0 300.0 400.0 500.0 600.0 700.0 April 2026 MRE November 2026 MRE g/t Weighted Ag Grade (-27.7%) ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 5 What Has Changed in the Geological Model An additional 46drill holes totalling 4,725.7 m of reverse circulation (RC) anddiamond core drilling were added since the reporting of the April 2026 MRE. RC drilling contributed 32 holes for 2,710 m. Diamond coring contributed 14 holes for 2,015.7 m. Drilling added new assay data and geological data to the north and northwest, as well as new data from above and below the April 2026 MRE. A number of infill holes pierced the April 2026 MRE adding new resource ounces and converting existing Inferred to Indicated resources within and external to the previous MRE block model6 . Drilling included the discovery of the new Elizabeth Hill Deeps mineralised zone which is not included in this resource estimate as requires further drilling to be included as an Inferred resource7 . The updated November Mineral Resource incorporates a revised mineralisation interpretation and estimation domains. The updated wireframe volume increased from approximately 85,673 m³ to 117,114 m³ (+36.7%), with material previously outside the April mineralisation wireframes now captured by the new geological interpretation. Revised compositing, domain selection, ordinary kriging estimation and a slightly different conceptual pit constraint also affect the comparison. The 568 koz silver resource increase is attributable to a combination of new 2026 drilling results, geological interpretation changes and refinements in estimation methodology. The new resource classification incorporates historical underground drilling information. There has been no change in depleted volumes between April and November 2026 MRE updates. The increased Indicated resource estimate reflects the geological and data-confidence assessment adopted for the updated estimate, as described in JORC Table 1 (Appendix A). Figure 3. Long-section view showing silver sample composites (red traces) outside the historical ERM silver mineralisation wireframe (green), supporting the expanded interpretation used in the November MRE update8 . 6 Refer WCE ASX announcement dated 27 August 2026, “Correction - Bonanza Silver Grades at Elizabeth Hill” 7 Refer WCE ASX announcement “Elizabeth Hill New High Grade Silver Discovery”, 9 July 2026 8 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 6 The previous wireframe model for mineralisation did not include a considerable number of grades above the selected cut-off grade of > 20 g/t Ag. The current model was updated by creating a manual interpretation and wireframe models that captured all grade composites. This increased the modelled tonnage within the mineralised zones. Average grades as a consequence were reduced because the new wireframes captured low grades that were not included in the previous April 2026 model. Silver Grade–Tonnage Sensitivity The resource is reported at a 20 g/t Ag cut-off. At a sensitivity of 60 g/t Ag, the depleted and open-pit- constrained model contains approximately 3.201 Moz silver in 74.7 kt grading 1,333 g/t Ag. This corresponds to approximately 95.2% of the total contained ounces in 31.8% of the tonnes reported at the 20 g/t cut-off. Table 3. Grade–tonnage sensitivity: total resource, depleted and conceptual pit-constrained9 Cut-off (g/t Ag) Tonnes (kt) Average grade (g/t Ag) Silver (koz) 0 249.0 421 3,370 20 234.7 446 3,363 30 140.9 726 3,287 40 104.3 968 3,247 50 86.8 1,155 3,222 60 74.7 1,333 3,201 80 63.3 1,559 3,175 100 58.5 1,680 3,161 The 60 g/t figure is a model sensitivity only and is not a separate economically established mining cut-off or Ore Reserve. Grades and ounces at different cut-offs relate to the same block model and must not be added. 9 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 7 Figure 4A. Sensitivity of tonnes and silver grade to reporting cut-off (0–100 g/t Ag). Figure 4B. Sensitivity of tonnes and contained Ag ounces to reporting cut-off (0–100 g/t Ag). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 8 Conceptual Open-pit Constraint and RPEEE The Mineral Resource is constrained by an optimised conceptual pit shell to support the assessment of reasonable prospects for eventual economic extraction (RPEEE). The modelled shell is approximately 220 m long, 210 m wide and 105 m deep. It is not a designed pit, a mine plan, a reserve estimate or a demonstration of economic extraction. The pit optimisation uses an indicative A$86/oz silver price, a 46° overall pit slope, 5% dilution, 5% mining loss and a nominal processing-cost assumption of A$45.57/t. The 90% recovery assumption was informed by historical AMMTEC testwork on mine production samples undertaken between 1998 and 2000, which reported recoveries above 90%. The overall pit slope of 46° was retained for conceptual optimisation in the absence of site-specific geotechnical data. Processing assumptions, including recovery, remain subject to metallurgical validation. The November 2026 pit optimisation was completed using the industry-standard Lerchs–Grossmann algorithm, applying substantially the same economic assumptions as ERM’s April 2026 estimate (see the Company’s ASX announcement dated 22 April 2026). These include an A$86/oz silver price, 90% assumed metallurgical recovery, A$4.50/t mining cost, A$45.57/t processing cost and an overall pit slope of 46°. The updated block model incorporates smaller parent cells and an expanded mineralisation interpretation, resulting in a smoother conceptual pit shell that captures additional mineralised material. The revised pit shell remains broadly comparable to the April 2026 optimisation. Table 4. Principal conceptual pit-optimisation assumptions (not development forecasts)10 Parameter Assumption Parameter Assumption Silver price A$86/oz Overall pit slope 46° Ore mining cost A$4.50/t Waste mining cost A$4.50/t Processing cost A$45.57/t G&A cost A$3.00/t Dilution 5% Mining losses 5% Payability 99% Royalty / sales charges 5% Fresh rock density 2.75 t/m³ Oxide density 2.63 t/m³ Processing recovery 90%* Pit-optimisation method Lerchs–Grossmann * Metallurgical recovery of 90% is an assumption used for pit optimisation and assessment of reasonable prospects for eventual economic extraction. It does not represent demonstrated metallurgical recovery and remains subject to validation through further testwork. 10 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 9 Figure 5. Conceptual resource-constraining pit shell, looking east (Source: Dmitry Pertel). RPEEE reporting constraint, not an engineered pit design. Elizabeth Hill Silver Project and Deposit Geology Elizabeth Hill is located approximately 45 km south of Karratha on granted Mining Lease M47/342 in the West Pilbara. WCE holds a 70% interest in M47/342, with Alien Metals Limited holding the remaining 30% (see Ownership and attributable metal). Figure 6. Elizabeth Hill locality within the West Pilbara. Regional holdings shown are contextual. ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 10 High-grade native silver occurs with silica-carbonate veining and alteration. Historical production was approximately 1.19 Moz silver from 16,830 tonnes grading 2,194 g/t Ag, with underground production ceasing in 200011 . The project is located in the Archaean granite-greenstone terrane of the North Pilbara. It is part of the Mesoarchaean West Pilbara Superterrane (WPS; ca. 3.2 Ga to ca. 2.93 Ga). The WPS is exposed from the Mallina Basin in the east to the unconformity to the Fortescue Group to the southwest. Within the WPS, the project is located within and adjacent to the layered mafic-ultramafic intrusion of the Munni Munni Complex (MMC – ca. 2,925 Ma). The MMC intruded into 3,130 Ma to 2,944 Ma granitic crust (Cherrata Granite Complex) during late stages of terrane amalgamation. Figure 7. West Pilbara Regional Geology. 11 Refer WCE ASX Announcement “2026 Annual Report” dated 30 September 2026 ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 11 The Munni Munni Fault (MMF) offsets the contact between the MMC and the footwall granites with approximately 600m of sinistral offset at surface. The MMF and other north-northeast trending faults do not offset the unconformity and basal unit of the Fortescue Group (Hardey Formation ca. 2,766Ma- 2,749Ma) overlying the WPS. This places a minimum age on the structural formation of the Elizabeth Hill deposit within the fault zone. The Elizabeth Hill silver mineralisation is structurally controlled and is located on the north-south trending MMF within a zone around and along the structural contact between the MMC and the granite footwall to the MMC. Figure 8. Local Geology Map of M47/342.12 Mineralisation has been intersected over a 160m north-south zone along the boundary of the MMF, plunging south along the MMC-granite contact. The zone has an east-west width of 70-75m with the 12 Refer WCE ASX announcement “Silver Mineralisation in Air Core Drilling”dated 24 February 2026. ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 12 high-grade core centred on the granite-ultramafic contact within the Munni Munni Fault zone (MMFZ). The Elizabeth Hill silver mineralisation is a distinctive deposit style in the Pilbara, comprising high-grade structurally controlled hydrothermal native silver and silver-sulphide mineralisation. The mineralised zone is separated into several discrete zones and occurs within a quartz carbonate chalcedonic silica alteration that locally shows veining, brecciation and fracture fill. The silver occurs in fine disseminations, needles, veins, nuggets and platelets up to several centimetres in diameter. Analogues have been drawn between Elizabeth Hill and such mineralised systems as the hydrothermal Co-Ni-Ag-Au-Cu systems in the Bou Azzer Inlier of the Anti-Atlas in Morocco and the hydrothermal Ag- Co-Ni vein systems of Cobalt, Ontario, Canada. These systems comprise many contemporaneous and cogenetic, yet individual ore systems in clusters within areas comparable in scale to the North Pilbara region. At Elizabeth Hill there are other metallic mineral intersections in drilling peripheral and within the native silver dominant system with structurally controlled hydrothermal veins of Ni, Cu, Pb and Zn mineralisation. The relationship of the native silver mineralisation to these other hydrothermal systems is a matter of ongoing exploration. Figure 9. 3D Elizabeth Hill Geological Model, oblique view to the NE, as used in November 2026 MRE. Blue dots and line are drill collars and traces. Granite–gneiss is pink; ultramafic is green; Munni Munni fault zone is red. Resource Model Inputs and Classification The updated Mineral Resource estimate was built from interpreted silver mineralisation wireframes and a three-dimensional block model with 2.5 m × 2.5 m × 5 m parent cells and sub-celling. Forty-four (44) silver mineralisation zones were modelled at a nominal 20 g/t Ag interpretation threshold. Drillhole and underground channel samples were composited to onemetre, and ordinarykriging estimation methods were applied with high-grade indicator domains and capping. Block-model estimates underwent visual ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 13 and statistical validation. The technical report records 353 drillholes and 314 underground channels defining the deposit area, of which 212 drillholes and 197 underground channels were used in the updated estimation; not all database holes intersect the mineralised zones. Resource classification considered drill spacing, geological interpretation, estimation confidence and the historical underground datasets. The Competent Person’s full methodology and QA/QC assessment are summarised in the accompanying JORC Table 1. Bulk densities of 2.75 t/m³ for fresh rock and 2.63 t/m³ for oxide zones were assigned. The Technical Report recommends additional density sampling and continuation of routine assay QA/QC programmes, including selected independent laboratory checks13 . Further Resource Growth and Exploration Opportunities Granite-Hosted Silver – North-West Extension A mineralised zone on the north-west extension of the deposit is supported by one exploration line and remains in the Inferred category. Follow-up drilling has commenced to test continuity, potential extension and whether further material can ultimately be upgraded in classification (Figure 10). Figure 10. Three-dimensional view of the Elizabeth Hill mineralised bodies and drill traces, highlighting the NW extension (purple) relative to the main mineralised bodies (green) and Elizabeth Hill Deeps (red). Source: Dmitry Pertel’s internal November 2026 Elizabeth Hill technical report. The NW extension is included in the November 2026 Mineral Resource Estimate as Inferred material and represents an opportunity for further resource definition and potential growth. Additional drilling is required to improve geological confidence, support potential conversion to the Indicated category and 13 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 14 test extensions to the mineralisation. Drilling has commenced in H2 2026 to extend and infill drill the identified area of the NW extension. Elizabeth Hill Deeps Additional mineralisation referred to as Elizabeth Hill Deeps is interpreted at approximately −68 m RL beneath the main deposit, based on three intersections (Figure 11). The new zone of mineralisation lies below and south of historically mined areas. The area is currently unclassified and excluded from the 3.363 Moz Ag Mineral Resource. Additional drilling is required to test continuity and establish whether any Mineral Resource can be defined. No underground mining scenario or additional ounces are reported for Elizabeth Hill Deeps. Drilling has commenced in H2 2026 to test and extend the Elizabeth Hill Deeps mineralisation. Figure 11. Elizabeth Hill Deeps interpreted mineralised body relative to the model and drill traces. Elizabeth Hill Deeps remains unclassified and is excluded from the resource estimate. Further drilling is underway to test for and define further mineralisation14. Additional Technical Evaluation The Competent Person recommends focused north-west infill drilling; verification of historical working voids and underground data; further bulk-density measurements; additional umpire laboratory QA/QC; metallurgical testing; oxide zone domain definition; and a scoping-level mining assessment. Timing, scope and budgets for these programmes remain subject to technical planning and Board approval where not already included as part of existing Scoping Study test work. 14 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 15 ASX Listing Rule 5.8 Disclosure - Summary Geology and Geological Interpretation Mineralisation is hosted along the Munni Munni Fault, at its contact with altered ultramafic and granitoid units. The great majority of mineralisation is localised in a structure that juxtaposes ultramafic against granite. Granite-granite juxtaposition on either side of the fault has only relatively minor silver mineralisation. However, this remains an area of active current exploration and previous conclusions may be influenced by exploration that has concentrated solely on that granite ultramafic association, without examining possibilities beyond that relationship. Within the mineralised zone, silver is intimately associated with silica-carbonate veining and alteration. High grade silver mineralisation often forms nuggetty networks of native silver adjacent to areas of intense carbonate veining in both ultramafic (dominantly) and granite (subordinately). Greater geological detail is provided in the prior sections –‘Elizabeth Hill Silver Project and Deposit Geology’; ‘WhatHas Changed intheGeological Model’; ‘Further Resource Growth and Exploration Opportunities’; and ‘Appendix A – JORC Table 1’. The updated resource model comprises 44 interpreted silver wireframes that account for the structurally controlled, locally very high-grade and nuggetty style of native silver mineralisation. Substantial local variation in grade requires appropriate treatment of high-grade populations. The interpretation and wireframes were generated interactively for 28 west-east orientated cross sections using 20 g/t Ag cut-off grade. Examples of four (4) resource sections (Figures 13 to 16), referenced to plan view (Figure 12) follow. Figure 12. Plan view showing the interpretation section lines for the November 2026 Elizabeth Hill Mineral Resource Estimate. North is at the top of the figure15 . 15 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 16 Figure 13. Section 4 (7951N) – Elizabeth Hill November 2026 MRE interpretation. W-E section looking N, with interpreted mineralisation wireframes (>20g/t Ag), drill holes and estimated resource blocks. Figure 14. Section 10 (7921N) – Elizabeth Hill November 2026 MRE interpretation. W-E section looking N, with interpreted mineralisation wireframes (>20g/t Ag), drill holes and estimated resource blocks. 2026 Drilling 2026 Drilling ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 17 Figure 15. Section 15 (7891N) – Elizabeth Hill November 2026 MRE interpretation. W-E section looking N, with interpreted mineralisation wireframes (>20g/t Ag), drill holes and estimated resource blocks. Figure 16. Section 20 (7868N) – Elizabeth Hill November 2026 MRE interpretation. W-E section looking N, with interpreted mineralisation wireframes (>20g/t Ag), drill holes and estimated resource blocks. Lack of Drilling Near Surface ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 18 Sampling, Drilling and Estimation The source dataset includes modern and historical RC, diamond drilling and underground channel sampling. Reverse circulation (RC) drilling was used to obtain 1 m samples. Diamond core (DC) drilling was also undertaken, with half-core samples collected under geological supervision. Sample intervals were determined by geological contacts, up to a maximum length of 1 m. Sample Analysis Method Samples were analysed at ALS Perth for 48 elements using four-acid digestion with an ICP-MS finish. Samples exceeding the upper silver detection limit (>100 g/t Ag) were reanalysed at ALS Perth using ore- grade four-acid methods Ag-OG62, ME-OG62, Pb-OG62 and Zn-OG62. Samples grading >1,500 g/t Ag were analysed at ALS Langley, Canada, by 30 g fire assay with a gravimetric finish (Ag-GRA21). Samples grading >10,000 g/t Ag were further analysed at ALS Langley using the silver concentrate method (Ag- CON01). Silver grades were interpolated into the block model using ordinary kriging (OK) within the indicator grade domains defined at 100 g/t and 2,000 g/t Ag cut-offs. Silver grades were interpolated with application of a top-cut to the grades following statistical analysis. Based on statistical analysis, a top- cut of 53,000 g/t Ag was applied to all composites to reduce the influence of outlier grades on local estimates. Figure 17. Histogram of silver grades. Three grade populations can be distinguished - below 100g/t Ag; between 100g/t Ag and 2,000g/t Ag; >2,000g/t Ag16 . 16 Dmitry Pertel, Elizabeth Hill Technical Report, November 2026 (internal report). ASX: WCE ANNOUNCEMENT 11 November 2026 WEST COAST SILVER LIMITED ASX | WCE Page 19 Each modelled grade domain was estimated separately using corresponding sample composites. Hard boundaries were used between the domains. A ‘parent block’ estimation technique was used where sub-cells within each parent block were informed with the same grade. Each modelled mineralised body was estimated separately using corresponding sample composites. The OK interpolation method was performed at consecutive expanded anisotropic search radii until all cells were interpolated. The search radii were determined by means of evaluation of the modelled variograms and the general strike of the deposit. Sample processing, assa