Significant Channel Sample Results from Tirzzit

Talisman Metals PLC

07 August 2026

RNS Number: 6681P

Talisman Metals PLC

7 August 2026

Talisman Metals PLC

("Talisman" or the "Company")

Significant Channel Sample Results from the Tirzzit Project, Morocco

Talisman Metals PLC ("Talisman" or the "Company") announces assay results from recent channel sampling and surface exploration activities completed at the Tirzzit Project in July 2026 following the identification of a new zone of outcropping copper mineralisation (see press release of 23 July 2026).

Tim McCutcheon, Talisman's CEO stated, "The new target outcrop at Tirzzit has produced exciting grades and is a key focus for Talisman's planned drill campaign. Given that the outcrop is about half a kilometre away from the exposed known mineralisation to the south, and that the total strike length is at least four kilometres, I am encouraged that we indeed have a large area of interest."

Highlights

·    Channel TZ-CH008: 1.47m@1.05% Cu and 22.96ppm Ag

·    Channel TZ-CH009: 1.69m@2.62% Cu and 41.54ppm Ag

·    Channel TZ-CH010: 0.90m@1.36% Cu and 29.00ppm Ag

·    Channel TZ-CH012: 1.97m@0.60% Cu and 44.47ppm Ag

·    Channel TZ-CH013: 1.80m@2.26% Cu and 11.95ppm Ag

·   Channel TZ-CH014: 2.78m@2.16% Cu and 41.76ppm Ag including 0.75m @0.24% Cu and 0 ppm Ag of internal dilution

Results confirm that mineralised horizon in the "basal series" identified during historical mapping shows:

·    Added 70m of lateral continuity, with values above cut-off grade in 6 of 7 channels over a strike length of 300m;

·    Copper (Cu) grades ranging from 0.60% to 2.62% and silver (Ag) grades ranging from 12 to 44 ppm;

·    True thicknesses, measured using a Jacob Staff, with intercepts above cut-off grade (Cu Cut-Off Grade ≥0.3%) ranging from 0.90 m to 2.78 m;

·    Copper oxides such as malachite Cu₂CO₃ (OH)₂ and argentian chalcocite (Ag substituting for Cu in Cu₂S).

Figure 1: Pictures showing outcropping mineralisation and malachite within the siltstones of the basal series

Figure 2: Tirzzit map of 2026 channel sample results and site of discovered outcropping copper mineralisation

Results

Horizons exhibiting malachite mineralisation at surface within the Basal Series (see Figures 1) were channel sampled along strike over approximately 70m of the interpreted 300m Northwest trend, with approximately one channel sample collected every 5m to 30m (see Figure 2 and 3). Results are summarised in Tables 1.

Figure 3: New Target area map showing 2026 channel sample results

Intercepts presented in Table 1 were defined using a cut-off grade of Cu > 0.30% and average grade for the full interval length was calculated, note that all the intervals are reported as true width.

Table 1: Intercepts and Anomalous interval Summary Table

Note: Coordinates were collected with a Hand GPS using the datum UTM WGS84 Zone 29.

Multi-element assay results (30 elements analysed) indicate that Cu-Ag mineralisation is associated with anomalous barium (Ba), lead (Pb), zinc (Zn), cobalt (Co), and manganese (Mn). This association is characteristic of sediment-hosted stratiform Cu-Ag systems.

Methodology and QAQC

The sampling was done using channel sampling, with sub-vertical groves against outcrops dipping 20 to 30 Degrees to the North-North-West, cut with a circular saw on 63.5mm wide grove (HQ Core Diameter). True thickness of the sampling intervals where measure with a Jacob Staff.

A total of three QA/QC samples were inserted into the original samples, comprising approximately 5% blanks, 5% field duplicates, and 5% certified reference materials ("CRMs").

Samples were submitted to the Labomine laboratory (Certified under ISO/IEC 17025 in 2025) for sample preparation (crushing at 2mm 85% pass and pulverised at 75 microns) and multi-element analysis using a four-acid digestion (HCl-HClO₄-HNO₃-HF) with ICP-AES finish. The analytical method has a lower detection limit ("LOD") of 11 ppm for copper (Cu) and 6 ppm for silver (Ag).

Blank samples showed no evidence of contamination above three times the detection limit for Cu or Ag. Certified reference materials returned copper values approximately 6.37% above certified values, Field duplicates where insufficient in numbers to confirm repeatability and the Company is reviewing the potential analytical bias; however, the Company does not currently consider this issue to materially impact the interpretation of the results.

For the reporting of each intercept stated comprised of more than one sample and samples are of differing lengths. In this case the average grade for the full interval length was calculated by length-weighted averaging, a standard method for determining average grades.

About The Tirzzit Project

The Tirzzit Project is a sediment-hosted stratiform Cu-Ag system, located 225km east of the city of Agadir, Morocco. The acquisition transaction of the Project was announced February 16, 2026 (see press release) from a wholly owned subsidiary of Aya Silver & Gold Inc. (TSX: AYA; OTCQX: AYASF) ("Aya"), the Company's 4.7% shareholder. The Project consists of two mining licenses covering a surface area of 16.5km². Historic drilling results, as reported by Moroccan Government agency Bureau of Research and Mining Participations (BRPM) between 1972 and 1976 ("BRPM Reports"), include drill intersections of 3.16% Cu over 2.5m and 0.60% Cu over 11.4m. Presently the Company is reviewing the extensive BRPM Reports and past collected geophysical data for exploration planning slated to commence in 3Q2026. Talisman continues to process with Aya the formal transfer of the Tirzzit licences on the back of the sale agreement announced February 16, 2026.

Qualified Person

The technical disclosure in this news release has been approved by Fabien Linares, MSc, MAusIMM, a Qualified Person as defined in JORC 2012. The scientific and technical information summarized in this disclosure and related to historic exploration was reviewed by Mr. Linares and he has visited the Project area. Mr. Linares is Head Geologist of Talisman Metals PLC and has sufficient experience that is relevant to the commodity, style of mineralisation or type of deposit under consideration and activity which he is undertaking to qualify as a Competent Person under the JORC code (2012 Edition).

End

For further information:

Talisman Metals PLC

Tim McCutcheon (Chief Executive Officer and Director)

Tel +353 (0) 1 525 6710

contactus@talismanmetalsplc.com

Beaumont Cornish Limited (Nominated Adviser)

James Biddle / Roland Cornish

Tel: +44 (0) 207 628 3396

CMC Markets UK Plc (Broker)

Thomas Smith / Thomas Curran

Tel: +44 (0) 20 3003 8255

BlytheRay (Financial PR)

Megan Ray / Said Izagaren

Tel: +44 (0) 20 7138 3204

talismanmetals@blytheray.com

JORC Code (2012) - Historical Exploration Results Disclaimer

The information in this announcement that relates to historical reported exploration results is based on, and fairly represents, information and supporting documentation prepared by previous operators and/or extracted from historical reports.

The historical exploration results referred to in this announcement were reported prior to the introduction of the JORC Code (2012) and have not been reported in accordance with the JORC Code (2012).

A Competent Person has not done sufficient work to disclose the historical exploration results in accordance with the JORC Code (2012). It is possible that following further evaluation and/or exploration work, the accuracy and reliability of the historical exploration results may not be confirmed.

The Company has not independently verified the historical exploration results, and no assurance can be given that future exploration work will result in the confirmation or upgrade of the historical results to JORC Code (2012) compliant Mineral Resources or Ore Reserves.

The Company considers the historical exploration results to be relevant as they provide an indication of the potential of the project. However, the information should not be relied upon as a representation of the current mineral resource or exploration potential.

Technical Glossary

Ag	Silver
Argentian chalcocite	Argentian chalcocite is a silver-bearing variety of chalcocite (Cu₂S) in which minor Ag substitutes for Cu in the crystal structure. It typically forms in Cu-Ag sulfide systems, particularly under reducing conditions and during supergene enrichment or low-temperature hydrothermal alteration.
Basel Series	A stratigraphic layer within a sediment basin that has properties conducive to hosting mineralisation.
Cu	Copper
Channel sampling	A systematic sampling method in which a continuous, linear sample is collected across an exposed rock face or outcrop, typically perpendicular to the mineralised structure, to obtain a representative measure of grade over a defined width. The sample is usually cut or chipped along a uniform channel to reflect the true thickness and composition of the mineralised interval.
HCl-HClO₄-HNO₃-HF	HCl - hydrochloric acid HClO₄-perchloric acid HNO₃ - nitric acid HF - hydrofluoric acid Dissolving silicate and sulfide minerals in a near-total or total digestion of rock samples and usually used to prepare samples for ICP-OES / ICP-MS analysis.
ICP-AES	Inductively Coupled Plasma Atomic Emission Spectrometer is a type of elemental analysis used in laboratories.
Jacob staff	A graduated measuring rod, commonly used with a compass or clinometer, to determine the true thickness of geological units and to measure stratigraphic sections, particularly on inclined or uneven outcrop surfaces.
Malachite	A secondary copper carbonate hydroxide mineral (Cu₂CO₃(OH)₂), typically bright green in colour, formed by the weathering and oxidation of primary copper sulphides. It commonly occurs as coatings, vein fillings, or disseminations in the oxidised zones of copper deposits and is widely used as an indicator of near-surface copper mineralisation.
Ppm	Parts per million
R² value	A statistical measure regarding how well a data set forms a trend.

Nominated Adviser Statement

Beaumont Cornish Limited ("Beaumont Cornish"), is the Company's Nominated Adviser and is authorised and regulated in the United Kingdom by the Financial Conduct Authority. Beaumont Cornish's responsibilities as the Company's Nominated Adviser, including a responsibility to advise and guide the Company on its responsibilities under the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed solely to the London Stock Exchange. Beaumont Cornish is not acting for and will not be responsible to any other person for providing the protections afforded to customers of Beaumont Cornish nor for advising them in relation to the transaction and arrangements described in the announcement or any matter referred to in it.

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