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ROSKEAR EXPLORATION DRILLING UPDATE
Cornish Metals plc has provided an update on its surface diamond drilling program at the South Crofty tin project, with drillhole SDD26_001A reaching its final depth of 1,199.1 metres and intersecting zones of veining with visible cassiterite and sulphide mineralisation. This drillhole has intersected mineralised structures west of current Mineral Resource estimate envelopes, indicating potential for resource growth, and the second drillhole, SDD26_002, will target the same structures approximately 100 metres further west. Assay results from SDD26_001A are expected in June 2026, and the programme aims to test extensions to known mineralisation and evaluate exploration targets. Disclaimer*
About this update from Cornish Metals Plc
ROSKEAR EXPLORATION DRILLING UPDATE1 June 2026Cornish Metals plc (AIM: TIN) (“Cornish Metals” or the “Company”), a mineral exploration and development company focused on advancing its wholly owned and permitted South Crofty tin project (“South Crofty”) in Cornwall, United Kingdom, is pleased to provide an update on the ongoing surface diamond drilling programme in the Roskear area of the South Crofty mine.The programme comprises approximately 2,400 metres of drilling designed to test extensions to known mineralisation and evaluate several priority exploration targets identified through historic drilling and recent geological interpretation.Drillhole SDD26_001A has reached its final depth of 1,199.1 metres and has intersected zones of quartz-tourmaline veining with visible cassiterite, sulphide mineralisation, and alteration consistent with the target mineralised system.HighlightsDrillhole SDD26_001A completed to a final depth of 1,199.1 metresMultiple target mineralised structures intersected, including mineralised structures which host existing Mineral ResourcesMineralised structures intercepted west of current Mineral Resource estimate (“MRE”) envelopes, highlighting potential opportunities for resource growthSecond drillhole, SDD26_002, to commence targeting the same structures approximately 100 metres west of SDD26_001ASamples currently being prepared for shipment to ALS Laboratories in Loughrea, Ireland, with assay results expected in June 2026Don Turvey, CEO of Cornish Metals commented:“The completion of drillhole SDD26_001A marks an important milestone in this targeted exploration drilling programme at South Crofty. The drillhole has successfully intersected multiple projected mineralised structures, including extensions to known resource areas beyond the current Mineral Resource estimate envelopes.While assay results are still pending, the visual indications of mineralisation encountered are encouraging and support our geological interpretation of continued mineralisation to the west of the existing Mineral Resource areas. This programme is designed not only to assess opportunities for future Mineral Resource growth, but also to sterilise key infrastructure areas incorporated within the current mine design. We look forward to commencing the second hole in the programme and reporting assay results in due course.”Figure 1: Quartz chlorite tourmaline...
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