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 9 October 2025 Accelerated Phase 2 Drilling campaign commences at Elizabeth Hill • Phase 2 diamond drilling to commence on 10 October 2025 at the high-grade Elizabeth Hill Silver Project (Pilbara, WA) • Follows multiple bonanza-grade intercepts from Phase 1 (Aug–Sep 2025) • Program aims to test near-surface high-grade mineralisation, and prospective areas down plunge of the historical workings with mineralisation open at depth • Additional ~3,000m air core program scheduled to begin early November, targeting near-mine anomalies defined by recent geophysics • Geophysics in progress: Transient Electromagnetic (TEM) and drone magnetic surveys continuing to refine targets along the Munni Munni Fault and parallel structures • Drilling Contractor and WCE personnel have commenced mobilisation activities to site West Coast Silver Limited (ASX: WCE) (West Coast Silver or the Company) is pleased to advise that the second phase of diamond drilling will commence ahead of schedule, on 10 October 2025, at the high-grade Elizabeth Hill Silver Project in the Pilbara region of Western Australia (Elizabeth Hill) (Figure 1, Figure 2, Figure 6). The program has a dual focus: (1) to confirm and define the shallow, very high-grade silver immediately adjacent to the historic workings; and (2) to test a potential for deeper continuation to the south where the mineralisation remains open at depth. The Phase 2 drilling program will consist of approximately 14 diamond drill holes (~1,300 metres). This will be expanded as required based on the success of the program. Drilling will be undertaken by Wallis Drilling Pty Ltd. In addition, geophysical surveys have commenced to provideadditionalhigh-quality dataforrefinement of the proposed aircore programs commencing in November (Figure 3, Figure 4, Figure 5). Highlights ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 2 Commenting, Executive Chairman Bruce Garlick said: “We’re back on the ground and moving quickly to build on the outstanding grades from our initial campaign. Phase 2 is designed to do two things: demonstrate near-surface continuity in the oxide zone and test a deeper target that could represent a down-plunge repeat of the Elizabeth Hill system. Figure 1: Location of proposed diamond drill holes at Elizabeth Hill mine site and drill results ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 3 Down Plunge Exploration Targets Further evaluation of historical underground and surface drilling geology logs and geochemistry has reinforced the prospectivity of the down plunge target as a potential extension of the Elizabeth Hill Mine sequence (Figure 2). Underground diamond drill hole UGD084 intersected 2m@ 1,995g/t Ag withinan interval of 6m@ 705g/t Ag (Figure 1 ,Figure 2, Appendices 1-2). Drill logs at the time also describe native silver mineralisation within the 2m high grade interval, similar to that recorded in the Elizabeth Hill Deposit (WAMEX Report A62365). Underground diamonddrill hole UGD085 intersected 23,304ppm Ni, 6,013ppm Cu, 1,078ppm Pb, 4,104 ppm Zn and 50ppm Ag (Figure 1, Figure 2). The drill log describes complex textures with calcite brecciation reflecting similar geology to the Elizabeth Hill mine sequence (WAMEX Report A62365). These drill holes combined with drill hole AG33 (Figure 1, Figure 2), previously reported, provide confidence in targeting the down plunge extension of the Elizabeth Hill mineralisation. Figure 2: Long section A-A’ showing location of proposed diamond and aircore drill holes at Elizabeth Hill mine site1 1 Please refer ASXannouncements dated 24 September 2025; 2 September: 2025; 29 August 2025; and 22 August 2025. Reference: East Coast Minerals NL & Legend Mining NL, 2001. Annual Report for the period 1 April 2000 to 31 March 2001. Munni Munni Joint Venture Project also known as Elizabeth Hill. ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 4 Geophysical Programs Drone magnetic and Loupe TEM programs are currently being conducted on site. The Drone Magnetic survey is being flown at 20m line spacing to refine the targeting for planned aircore programs, as well as defining further potential Elizabeth Hill style targets on the Munni Munni fault (Figure 3, Figure 4). Figure 3: Drone magnetic survey ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 5 Figure 4: Location of drone magnetic survey ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 6 The Loupe TEM survey is being undertaken to test for near surface conductors that may support targeting along the Munni Munni fault, as well as other prospective structures (Figure 5). Figure 5: Location of Loupe TEM survey ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 7 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)2 . • Previous mining operation ceased in 2000: because of low silver prices (US$5)3 . • 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 6: Tenement Location Through the consolidation of the surrounding land packages into a single contiguous 180km2 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, and other fault systems subparallel to the 2 WAMEX Annual Report,1 April 2014 to 31 March 2015, Elizabeth Hill Silver Project, Global Strategic Metals NL, p16 3 www.kitco.com/charts/silver ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 8 Munni Munni fault system, which are considered prospective for Elizabeth Hill look-a-like silver deposits. The upcoming Phase 2 program represents the next step in defining near-surface continuity and testing deeper repeat potential within this proven high-grade system. 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. ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 9 Appendix 1 – Collar Details for Historical Underground Diamond Drill Holes, Elizabeth Hill Silver Mine Hole ID Easting (m) Northing (m) RL (m) Azi (°) Dip (°) EOH (m) UGD001 487013 7667873 6.2 184.0 1.5 25.7 UGD019 487022 7667865 -12.6 208.5 35.0 33.0 UGD021 487015 7667865 -13.7 230.0 -1.6 12.2 UGD022 487016 7667865 -13.7 212.0 0.0 16.5 UGD082 487029 7667865 -14.5 234.0 -46.0 36.7 UGD083 487029 7667865 -15.0 219.0 -56.0 60.0 UGD084 487029 7667865 -15.3 217.0 -73.5 69.0 UGD085 487030 7667865 -15.1 205.0 -65.0 77.9 UGD086 487029 7667865 -15.2 222.0 -67.0 59.2 UGD087 487029 7667865 -15.1 235.0 -66.0 47.8 Note: Coordinate system GDA94 Z50 Appendix 2 – Assay Results for Historical Underground Diamond Drill Holes, Elizabeth Hill Silver Mine Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD001 0 0.75 28,740 800 575 89 150 UGD001 0.75 1.5 6,855 372 362 58 105 UGD001 1.5 2.25 540 497 464 37 168 UGD001 2.25 3 410 498 681 125 97 UGD001 3 3.75 8,480 1,060 722 192 302 UGD001 3.75 4.5 375 1,425 884 280 284 UGD001 4.5 5.25 1,700 894 692 177 233 UGD001 5.25 6 1,530 2,680 683 830 319 UGD001 6 6.75 400 1,220 824 423 450 UGD001 6.75 7.5 60 316 433 439 178 UGD001 7.5 8.2 465 1,910 681 1,905 228 UGD001 8.2 9.1 500 1,185 626 1,460 349 UGD001 9.1 10 5 148 136 3,070 647 UGD001 10 10.8 6 385 111 6,040 284 UGD001 10.8 11.6 7 29 134 6,050 115 UGD001 11.6 12.5 4 33 126 5,090 83 UGD001 12.5 13.3 3 60 121 399 51 UGD001 13.3 14.1 12 15 65 939 30 UGD001 14.1 14.8 2 37 78 152 44 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 10 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD001 14.8 15.6 BD 33 51 283 20 UGD001 15.6 16.5 3 80 149 1,330 143 UGD001 16.5 17.6 5 19 85 8,940 40 UGD001 17.6 18.3 BD 148 314 6,160 160 UGD001 18.3 19 5 104 174 7,900 79 UGD001 19 19.6 13 520 244 796 70 UGD001 19.6 20.4 10 40 179 3,920 115 UGD001 20.4 21.2 5 166 128 1,460 84 UGD001 21.2 22 BD 186 194 230 82 UGD001 22 22.7 2 197 227 226 110 UGD001 22.7 23.3 BD 188 309 66 97 UGD001 23.3 24 BD 61 84 79 56 UGD001 24 24.7 BD 12 65 3,340 30 UGD001 24.7 25.4 BD 69 64 74 44 UGD001 25.4 25.7 BD 119 7 40 2 UGD019 0 1.2 BD 554 773 32 109 UGD019 1.2 2.4 BD 1,525 1,125 50 165 UGD019 2.4 3.6 BD 2,170 1,245 337 315 UGD019 3.6 4.8 BD 2,630 1,490 339 1,455 UGD019 4.8 5 BD 1,545 874 3,870 2,540 UGD019 5 7.2 BD 1,145 1,040 346 485 UGD019 7.2 8.4 BD 1,090 700 83 154 UGD019 8.4 9.6 BD 639 635 129 250 UGD019 9.6 10.8 BD 162 610 85 126 UGD019 10.8 12 BD 913 728 272 590 UGD019 12 13 BD 809 499 362 701 UGD019 13 14 BD 507 562 88 503 UGD019 14 15 BD 348 513 93 327 UGD019 15 16 BD 331 170 34 117 UGD019 16 17 BD 245 165 48 56 UGD019 17 18 BD 747 473 150 290 UGD019 18 19 BD 784 381 81 174 UGD019 19 20 BD 899 651 209 436 UGD019 20 21 BD 644 630 121 377 UGD019 21 21.7 BD 1,795 988 93 536 UGD019 21.7 23 BD 691 383 337 229 UGD019 23 24 BD 316 284 205 520 UGD019 24 25 BD 237 246 42 83 UGD019 25 26 BD 503 416 74 165 UGD019 26 27 BD 446 301 17 130 UGD019 27 28 BD 447 411 159 132 UGD019 28 29 BD 346 334 30 95 UGD019 29 30 BD 162 209 1,600 60 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 11 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD019 30 31 BD 99 226 1,820 66 UGD019 31 32 BD 500 343 346 255 UGD019 32 33 BD 83 235 46 71 UGD021 0 0.75 BD 1,240 791 200 773 UGD021 0.75 2 BD 1,365 707 579 1,950 UGD021 2 3 BD 918 525 698 911 UGD021 3 4 BD 450 470 260 276 UGD021 4 5.4 BD 606 478 100 194 UGD021 5.4 6.2 BD 1,030 642 99 198 UGD021 6.2 7.1 BD 92 122 568 69 UGD021 7.1 8.1 BD 77 173 9,410 38 UGD021 8.1 8.4 BD 80 62 3,120 38 UGD021 8.4 9.1 BD 8 11 1,655 25 UGD021 9.1 10 BD 9 10 57 38 UGD021 10 11 BD 27 10 1,995 41 UGD021 11 12.2 BD 19 9 69 26 UGD022 0 1.3 BD 950 677 100 191 UGD022 1.3 2.5 BD 669 517 283 876 UGD022 2.5 3.7 BD 831 497 340 1,290 UGD022 3.7 4.7 BD 1,765 842 324 1,435 UGD022 4.7 5.7 BD 983 464 549 472 UGD022 5.7 6.8 BD 963 527 484 673 UGD022 6.8 7.9 BD 1,280 593 1,095 162 UGD022 7.9 9.05 BD 882 310 1,040 108 UGD022 9.05 9.9 BD 63 111 606 73 UGD022 9.9 11 BD 25 140 1,815 40 UGD022 11 11.9 BD 9 38 10,000 31 UGD022 11.9 12.9 BD 5 8 10,000 BD UGD022 12.9 13.35 BD 33 32 10,000 551 UGD022 13.35 14.05 BD 24 9 1,205 136 UGD022 14.05 14.6 BD 10 6 120 19 UGD022 14.6 15.6 BD 5 9 3,170 24 UGD022 15.6 16.5 BD 16 10 45 22 UGD082 0 36.7 NA NA NA NA NA UGD083 0 2 0 261 687 15 76 UGD083 2 4 20 1,896 1,147 31 134 UGD083 4 6 0 476 666 33 116 UGD083 6 8 50 878 803 301 225 UGD083 8 10 0 642 607 20 95 UGD083 10 12 0 1,275 857 26 114 UGD083 12 14 20 2,276 1,248 23 136 UGD083 14 16 0 312 582 398 501 UGD083 16 18 0 648 509 30 115 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 12 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD083 18 20 0 348 620 10 86 UGD083 20 22 0 1,043 953 585 1,214 UGD083 22 24 0 1,196 900 18 103 UGD083 24 26 0 1,397 809 49 233 UGD083 26 28 0 1,052 776 519 636 UGD083 28 30 20 1,615 1,134 43 354 UGD083 30 32 0 1,174 931 40 127 UGD083 32 34 0 1,660 943 55 891 UGD083 34 36 0 581 933 50 115 UGD083 36 38 0 373 716 10 100 UGD083 38 40 0 109 479 31 131 UGD083 40 41 0 102 492 16 130 UGD083 41 42 0 96 498 16 97 UGD083 42 43 0 115 519 12 109 UGD083 43 44 0 84 482 16 93 UGD083 44 45 0 88 492 18 91 UGD083 45 46 0 152 516 48 128 UGD083 46 47 0 172 523 32 257 UGD083 47 48 0 650 1,142 199 432 UGD083 48 49 0 661 304 4,312 201 UGD083 49 50 0 181 426 129 381 UGD083 50 51 0 599 416 108 158 UGD083 51 52 10 707 323 116 221 UGD083 52 53 0 651 408 182 260 UGD083 53 54 0 190 305 1,827 86 UGD083 54 55 0 241 439 30 118 UGD083 55 56 0 31 60 438 158 UGD083 56 57 0 8 8 922 57 UGD083 57 58 0 12 7 94 47 UGD083 58 59 0 20 7 55 56 UGD083 59 60 0 15 6 51 84 UGD084 0 2 0 453 687 10 73 UGD084 2 4 0 349 567 14 86 UGD084 4 6 0 517 623 15 88 UGD084 6 8 0 657 665 129 129 UGD084 8 10 20 1,290 749 31 90 UGD084 10 12 0 560 716 43 190 UGD084 12 14 0 286 391 282 277 UGD084 14 16 0 384 576 61 113 UGD084 16 18 0 379 583 13 87 UGD084 18 20 0 415 549 55 91 UGD084 20 22 0 336 606 145 179 UGD084 22 24 0 902 627 382 833 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 13 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD084 24 26 0 609 783 104 221 UGD084 26 28 0 650 430 130 167 UGD084 28 30 0 279 430 210 353 UGD084 30 32 0 175 487 74 183 UGD084 32 34 0 153 490 10 82 UGD084 34 36 0 206 455 24 151 UGD084 36 38 0 380 463 16 118 UGD084 38 40 0 153 441 29 165 UGD084 40 41 0 216 446 16 162 UGD084 41 42 0 153 481 25 185 UGD084 42 43 0 156 414 63 189 UGD084 43 44 0 163 448 18 143 UGD084 44 45 0 227 489 50 178 UGD084 45 46 0 206 519 23 126 UGD084 46 47 0 220 514 45 170 UGD084 47 48 0 143 548 13 126 UGD084 48 49 0 69 425 29 82 UGD084 49 50 0 118 433 30 86 UGD084 50 51 0 138 528 18 90 UGD084 51 52 0 116 459 26 135 UGD084 52 53 0 108 545 85 274 UGD084 53 54 10 87 312 406 886 UGD084 54 55 0 22 41 646 380 UGD084 55 56 0 12 19 130 808 UGD084 56 57 0 11 8 101 383 UGD084 57 58 30 20 16 36 92 UGD084 58 59 70 15 12 802 108 UGD084 59 60 60 11 9 38 80 UGD084 60 61 80 31 19 170 87 UGD084 61 62 3,340 133 41 676 165 UGD084 62 63 650 9 247 107 412 UGD084 63 64 20 5 26 75 74 UGD084 64 65 0 5 17 40 44 UGD084 65 66 0 9 37 26 50 UGD084 66 67 0 6 16 30 34 UGD084 67 68 0 21 5 20 22 UGD084 68 69 0 11 9 36 19 UGD085 0 2 0 454 730 17 73 UGD085 2 4 0 366 620 11 74 UGD085 4 6 0 417 619 13 77 UGD085 6 8 0 225 483 18 125 UGD085 8 10 0 465 675 85 236 UGD085 10 12 0 1,256 1,762 24 146 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 14 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD085 12 14 0 579 664 21 95 UGD085 14 16 0 390 654 11 94 UGD085 16 18 0 475 632 35 130 UGD085 18 20 0 547 654 18 125 UGD085 20 22 0 906 794 10 111 UGD085 22 24 0 1,316 915 50 140 UGD085 24 26 0 862 837 145 431 UGD085 26 28 0 131 474 26 104 UGD085 28 30 0 121 458 35 113 UGD085 30 32 0 117 486 19 123 UGD085 32 34 0 241 500 15 81 UGD085 34 36 0 605 634 43 152 UGD085 36 38 0 1,623 917 26 116 UGD085 38 40 0 983 737 74 101 UGD085 40 41 0 817 639 77 429 UGD085 41 42 0 863 789 9 93 UGD085 42 43 0 176 554 7 82 UGD085 43 44 0 151 513 8 84 UGD085 44 45 0 138 505 6 75 UGD085 45 46 0 132 493 9 77 UGD085 46 47 0 146 503 18 75 UGD085 47 48 0 800 687 9 100 UGD085 48 49 0 2,582 1,199 25 150 UGD085 49 50 30 6,001 1,105 97 190 UGD085 50 51 0 156 543 7 72 UGD085 51 52 0 87 550 16 70 UGD085 52 53 50 6,013 23,304 1,078 4,104 UGD085 53 54 0 1,783 1,042 140 102 UGD085 54 55 0 167 670 7 45 UGD085 55 56 0 335 797 8 42 UGD085 56 57 0 1,100 950 11 83 UGD085 57 58 0 883 808 12 93 UGD085 58 59 20 1,032 483 42 125 UGD085 59 60 0 231 624 69 140 UGD085 60 61 0 263 310 91 303 UGD085 61 62 0 16 14 27 53 UGD085 62 63 0 13 6 21 52 UGD085 63 64 0 13 9 26 40 UGD085 64 65 0 13 62 30 83 UGD085 65 66 0 29 238 30 191 UGD085 66 67 0 23 61 31 87 UGD085 67 68 0 14 8 22 33 UGD085 68 69 0 16 8 23 48 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 15 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD085 69 70 0 39 8 53 45 UGD085 70 71 0 25 9 28 51 UGD085 71 72 0 24 9 30 36 UGD085 72 73 0 20 10 56 34 UGD085 73 74 0 27 9 63 39 UGD085 74 75 0 18 8 54 27 UGD085 75 76 0 130 28 40 51 UGD085 76 77 0 55 34 80 88 UGD085 77 77.9 0 121 30 253 78 UGD086 0 2 0 291 726 10 64 UGD086 2 4 0 566 694 10 87 UGD086 4 6 0 1,258 1,030 30 91 UGD086 6 8 0 554 736 71 190 UGD086 8 10 0 263 481 31 115 UGD086 10 12 0 1,082 659 127 108 UGD086 12 14 0 420 595 41 134 UGD086 14 16 0 376 649 23 121 UGD086 16 18 0 179 759 20 82 UGD086 18 20 0 430 606 18 102 UGD086 20 22 0 237 645 28 106 UGD086 22 24 0 137 687 53 121 UGD086 24 26 0 216 487 86 275 UGD086 26 28 0 222 443 26 188 UGD086 28 30 0 189 454 53 132 UGD086 30 32 0 182 457 37 99 UGD086 32 34 0 205 525 25 105 UGD086 34 36 0 195 539 11 93 UGD086 36 38 0 189 476 9 85 UGD086 38 40 0 151 440 11 103 UGD086 40 42 0 505 503 8 104 UGD086 42 44 0 375 549 24 112 UGD086 44 46 0 417 799 9 73 UGD086 46 48 0 532 575 17 118 UGD086 48 50 0 1,055 579 28 277 UGD086 50 51 0 333 522 17 165 UGD086 51 52 0 207 465 16 106 UGD086 52 53 0 231 473 54 463 UGD086 53 54 0 774 1,994 84 548 UGD086 54 55 0 738 871 110 186 UGD086 55 56 0 434 566 31 123 UGD086 56 57 0 329 518 92 343 UGD086 57 58 0 244 353 296 423 UGD086 58 59.2 0 102 168 79 170 ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 16 Hole_ID From (m) To (m) Ag (g/t) Cu (ppm) Ni (ppm) Pb (ppm) Zn (ppm) UGD087 0 2 0 175 657 8 59 UGD087 2 4 0 801 740 14 98 UGD087 4 6 0 1,121 831 14 159 UGD087 6 8 0 677 688 331 551 UGD087 8 10 0 227 568 23 82 UGD087 10 12 0 453 1,005 44 200 UGD087 12 14 0 388 857 8 95 UGD087 14 16 0 327 721 10 93 UGD087 16 18 0 162 606 19 80 UGD087 18 20 0 181 696 61 361 UGD087 20 22 0 157 446 123 461 UGD087 22 24 0 358 788 19 363 UGD087 24 26 0 81 778 10 76 UGD087 26 28 0 247 524 47 134 UGD087 28 30 0 121 407 65 166 UGD087 30 32 0 127 366 47 97 UGD087 32 34 0 170 483 90 254 UGD087 34 36 0 421 604 55 226 UGD087 36 38 0 197 525 18 331 UGD087 38 40 0 550 664 14 130 UGD087 40 41 0 269 564 18 139 UGD087 41 42 0 458 583 58 166 UGD087 42 43 0 387 593 127 169 UGD087 43 44 0 452 674 38 223 UGD087 44 45 0 546 649 53 240 UGD087 45 46 0 320 523 49 277 UGD087 46 47.8 NA NA NA NA NA Notes: NA = not assayed, BD = below detection limit UGD001 was drilled in mineralisation within the underground stope and has been mined out 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 Appendix 3 JORC Code (2012) – Table 1 - Elizabeth Hill Silver Project, Western Australia Section 1 Sampling Techniques and Data (Criteria in this section apply to all succeeding sections.) Criteria JORC Code explanation Commentary Sampling techniques • Nature and quality of sampling (eg 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 (eg ‘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 (eg submarine nodules) may warrant disclosure of detailed information. • The historical exploration activities mentioned in this release have been obtained from open file data (WAMEX reports) extracted by Alien Metals, and other historical databases that Alien Metals has used to compile a master database. • The Competent Person (CP) confirms that sufficient spot checks of data in the Alien Metals master database, for selected historical drill holes, have been performed with the original WAMEX reports to verify the data extracted or captured in digital format, is as presented. The CP considers the data is fit for purpose for planning further exploration. • Data including procedure documentation have been obtained from Alien Metals. • West Coast Silver is undertaking a full validation of the nature and quality of the historical drilling and sampling undertaken. • West Coast Silver has however done sufficient verification of the sampling techniques, and in the CP’s opinion it provides sufficient confidence that sampling was performed to adequate industry standards and is fit for the purpose of planning exploration programmes and generating targets for further investigation. • All references to historical mineralisation are taken from reports and documents prepared by previous explorers that have been reviewed by West Coast Silver and considered to be fit for purpose. • The CP concludes the results highlighted by West Coast Silver are anomalous and warrant further investigation, based on his experience in the areas of the Company’s Project. Drilling: Pre-2002 Historical Underground Diamond Drilling ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 18 Criteria JORC Code explanation Commentary • Underground extensional exploration drilling consisted of diamond core drilling. Very limited information on sampling of underground holes (UGD001, 019, 021-22, 082-087) mentioned in the announcement and drilled by East Coast Minerals NL and Legend Mining Ltd in the early 2000’s, is documented in the historical reports. However, sampling was undertaken on one or two metre intervals. • Laboratory protocols are not available to determine the laboratory sample size. • The historical reports mention a variety of methods and techniques for analysing the drill core. • The CP is unable to verify historical sampling work but considers they provide an indication of mineralisation and are sufficient to plan further exploration. 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). Pre-2002 Historical Underground Diamond Drilling • Underground diamond drilling used either a Kempe Bazooka rig or LTK TT46 rig (~35mm core diameter). • The historical reports contain very limited information on drilling details and are not considered material to supporting the assessment of prospectivity and further exploration. Drill sample recovery • 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. Pre-2002 Historical Underground Diamond Drilling • West Coast Silver is undertaking validation of the historical data to determine whether this information has been collected in full. Only limited information is available in the open file reports addressing this criterion. However, for further exploration purposes, the CP regards this lack of information is not considered material. • These criteria will be partially validated within the Elizabeth Hill historical mine environment with twinning of some historical drill holes. Logging • 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. Pre-2002 Historical Underground Diamond Drilling • Underground historical drill holes were geologically logged to various degrees of detail. • West Coast Silver is undertaking verification of the quality and level of detail of the geological logging data. ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 19 Criteria JORC Code explanation Commentary • The total length and percentage of the relevant intersections logged. • The historical reports show very limited and selective core photos of variable quality. No other details are known about the core photography. • West Coast Silver has done sufficient verification of the data, in the CP’s opinion to provide sufficient confidence the logging was performed to adequate industry standards and is fit for the purpose of planning exploration programmes and generating targets for investigation. Sub-sampling techniques and sample preparation • 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 sub-sampling 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. Pre-2002 Historical Underground Diamond Drilling • The CP can confirm the diamond core for UGD001 was cut and a quarter core sample was collected for assaying, while UGD019, 021- 22, 082-087 were cut and half core samples taken for assaying. • Information on sample preparation is not available in historical reports. • Information for quality control procedures is not available in the historical reports. • Information on duplicates is available in the historical reports. • Sample sizes have not been described in the historical reports, except for UGD001 were it was mentioned “the small sample size may have been a contributing factor to problems recorded in obtaining correlation between lab results and core logging.” • The CP can’t verify if all the sample sizes were appropriate for the geology and style of mineralisation being investigated. However, the CP notes that for this style of mineralisation it is general industry standard to cut and collect half core drill samples for assaying. Quality of assay data and laboratory tests • 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 (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels Pre-2002 Historical Underground Diamond Drilling • Assaying and laboratory procedures are not available for most historical drilling. However, where available this information is described as below. • Underground samples submitted to Analabs were analysed by A103, Al04, A140 A119, F641W, F660, GA101 and Screen methods. Those submitted to Genalysis were analysed by AX/AAS, FA/AAS, FA/GRA and SFA/GRA methods. Intervals with visible silver were generally analysed by screen fire methods. ASX:WCE ANNOUNCEMENT 9 October 2025 WEST COAST SILVER LIMITED ASX | WCE Page 20 Criteria JORC Code explanation Commentary of accuracy (ie lack of bias) and precision have been established. • The CP cannot independently verify the QAQC of these analyses. • West Coast Silver has done sufficient verification of the assay data, and in th