Redmoor-Successful Twin Drilling+New Deposit Model

Results confirm reproducibility of historical results and mineralised continuity of the Redmoor SVS high-grade zones, while providing increased detail for the new and more robust SVS deposit model

Strategic Minerals plc (AIM: SML; USOTC: SMCDF), an international mineral exploration and production company, is delighted to announce that its wholly owned subsidiary, Cornwall Resources Limited ("CRL"), has completed its review of historical drill data following the receipt of results of twin drillhole CRD036, drilled at the Redmoor Tungsten-Tin-Copper Project ("Redmoor") in southeast Cornwall.

CRL further confirms the update to its Redmoor Sheeted Vein System ("SVS") deposit model, including significant improvements over the previous model, ahead of the Mineral Resource Estimate ("MRE") update due this quarter.

Continuity of Structure and Grade and Twinning*1 Results

• Results confirm good continuity of high-grade tungsten, tin, and copper mineralised structures within the SVS, both along strike and vertically through the resource, also confirming the presence of previously drilled lode-style mineralised structures, and identifying the presence of domains of high-grade tin mineralisation within the boundaries of the current JORC compliant (2012) Mineral Resource (2019).
• These results also support the reproducibility of historical drilling results from 30 holes drilled by Southwest Minerals ("SWM") between 1979 and 1982, supporting the inclusion of this data into the forthcoming MRE.

Model Updates*2 Ahead of New MRE

• Snowden Optiro has completed a comprehensive re-evaluation and re-modelling of the Redmoor geological and mineralisation model. This work includes the development of a fully integrated geological model, which had not previously been constructed at this level of detail (see Figure 1).
• Previously, high-grade domains within the SVS were modelled using a tin-equivalent (Sn.Eq) approach only, resulting in mixed tin-tungsten zones with lower spatial confidence.
• Crucially the revised model (see Figure 2) separates the high-grade zones into distinct high-grade tungsten-dominant and high-grade tin-dominant domains, providing improved geological resolution and potentially improved modelling outcomes.
• The Company believes these results will positively affect the required spacing and total number of drillholes required for the fully funded infill drilling programme, which was announced on 22 January 2026, designed to convert portions of a future Mineral Resource to an Indicated classification, as part of a planned prefeasibility study ("PFS") work programme, providing significant cost and time efficiencies compared to previous assumptions.

Figure 1 : Oblique view looking northeast showing newly modelled * 2 tin (green) and tungsten (red) high grade domains only, from within the Redmoor SVS, and how these domains sit in relation to the updated granite model (pink). All existing drillholes are shown in black.

Further Model Highlights:

• Tungsten-dominant domains occur at depth and to the east, whilst tin-dominant domains are prevalent at shallower depths and towards the west of the deposit. This distribution supports a metal zonation model related to proximity to the granite contact, with higher-grade tungsten mineralisation proximal to the granite and higher-grade tin mineralisation occurring more distally, as reflected in the updated geological interpretation (see Figure 1).
• In addition to the high-grade domains, the updated model includes a SVS envelope capturing lower-grade mineralisation surrounding the high-grade zones (see Figures 2 and 3). This broader mineralised envelope is intended to more accurately represent the full extent of the SVS and provide an improved framework for resource estimation.
• Modelling updates further indicate that drilling has intersected additional high-grade mineralisation outside the currently modelled SVS domains.

o Notably, drillhole CRD036 returned approximately 30 metres of mineralisation beyond the revised SVS interpretation, which, subject to further drilling and modelling, may represent potential extensions to high-grade mineralised zones.

• Results from remaining 5 holes will feed into model updates ahead of the Q1 2026 MRE.
• The development of a comprehensive geological model provides a robust foundation for future metallurgical testwork, geotechnical studies, and mine planning, enabling improved integration between geological interpretation and downstream technical studies.

Dennis Rowland, CRL Managing Director, said:

"Drillhole results to date from CRD033-036 have highlighted the high-grade nature of the Redmoor SVS deposit and the strong continuity of structure and grade within the deposit. These results, alongside the identification of distinct high-grade tungsten and tin domains, have resulted in increased modelling confidence and the new and improved deposit model.

The positive twinning results from CRD036 mean that the Company also has increased confidence in the inclusion of the data from the 1980s SWM drillholes, providing a significant increase in available data for the MRE update as well as time and cost savings for the planned infill drilling. Alongside the new and significantly improved modelling of the deposit, these outcomes are expected to positively feed into the forthcoming MRE update."

Mark Burnett, Strategic Minerals Executive Director, said:

"The positive results from the twinning drilling and previously reported outcomes of the continuity of structure and grade have provided the possibility for significant time and cost savings as we accelerate towards another phase of drilling operations at Redmoor. For the cost of drilling three twin drillholes, the programme has allowed for the inclusion of data from 30 historical drillholes to the model. The Board applaud the CRL team on delivering these positive results and outcomes.

With the new model taking shape, and the remaining drill results from the 2025 programme expected very soon, we look forward to the production and announcement of the new Redmoor MRE before the end of Q1 2026."

Detail of Model Updates*2

Drillhole CRD036 (Figure 2) was intentionally drilled to twin historical drilling results from holes drilled by SWM in 1980 (drillholes RM80_05B and 05C) and confirm the presence of historically drilled tin- and copper-rich structures along with intersecting the higher-grade, tin-rich section of the resource within the shallower extent of the SVS system.

Figure 2: (top - old model) Plan view of the previously modelled high-grade domains (gold) used in the 2019 Redmoor MRE, showing CRD036 (in red) and other drillhole traces (black). (bottom - new model) Plan view of the deposit including the newly modelled high-grade domains (red-tungsten and green-tin), as well as the lower grade SVS envelope (gold), with the trace of CRD036 (in Red) and other drillholes (black). CRD036 is an infill hole aimed at testing short-spaced continuity of structure and grade.

Following a review of Redmoor's new geological model (see Figure 2, bottom) and subsequent results from CRD036, CRL's geologists consider that CRD036 supports the validity of the historical SWM drillholes (Figure 3), and coupled with the previously drilled twin hole (CRD033) (see: RNS dated 13th October 2025), CRL has a high level of confidence in the reliability of the historical data and its suitability for inclusion in future geological models and the forthcoming Redmoor MRE update. This means the cost of drilling 3 drillholes has created the ability to add 30 drillholes worth of data to the model, representing a significant time and cost saving given these holes would otherwise have required drilling as part of upcoming infill drilling programme.

Figure 3 includes a cross-section of the drillhole, showing CRD036 and proximal CRL and SWM drillholes (coloured on WO₃) against the updated high-grade domains (high-grade tin domains in green and high-grade tungsten domains in red) within the newly modelled SVS lower-grade envelope (yellow and grey) from the new deposit model. Upon final update, following receipt of remaining drillhole sample results from the laboratory, this new model will be used as the basis for the forthcoming MRE update.

Figure 3: Cross-section of CRD036, including WO₃ grades. Zones in red represent the updated tungsten dominant domains and zones in green represent tin dominant domains, with CRD036 intersecting a tin-dominant section of the resource. The SVS envelope is shown in grey and yellow.

NOTES:

Note*1 Twinned drillholes refer to new CRL drillholes which are aimed to intersect SVS mineralisation in close proximity to previous historical drilling undertaken by Southwest Minerals in 1978-1982, in order to verify the robustness of the historical drilling data, as well as test the continuity/reproducibility of grade and structure across the spacing between the drillholes.

Note*2 CRL makes no assumptions, ahead of the MRE update, on the outcomes of the new deposit model and its contribution to the MRE update.

1 Equivalent metal calculation notes; Sn(Eq)% = Sn% x 1 + WO3% x 1.43 + Cu% x 0.40. WO3(EQ)% = Sn% x 0.7 + WO3 + Cu% x 0.28. Commodity price assumptions: WO₃ US$ 33,000/t, Sn US$ 22,000/t, Cu US$ 7,000/t. Recovery assumptions: total WO3 recovery 72%, total Sn recovery 68% & total Cu recovery 85% and payability assumptions of 81%, 90% and 90% respectively

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