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Great Western Mining Corporation PLC Announces Drilling Commences at Defender Tungsten Project

(Very Positive)
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Great Western Mining (OTCQB:GWMOF) has commenced drilling at its Defender Tungsten Project in Mineral County, Nevada, targeting an initial 600–1,000 metre corridor covering the Pine Crow, Dough God and Defender historic mines. The fully funded 2026 programme comprises a minimum 7,000 feet (2,135 metres) of drilling in up to 22 holes to test tungsten grade and continuity and to generate data for a maiden JORC-compliant Mineral Resource Estimate by the end of 2026.

Addison Mining Services has been appointed independent Competent Person, with Director Lewis Harvey on site overseeing logging, sampling and QA/QC. Assay results are expected through September–October 2026, while metallurgical flotation test results from a 750 kg bulk sample are anticipated in August 2026.

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Positive

  • 7,000 feet drilling programme to support maiden tungsten MRE by end-2026
  • Fully funded 2026 exploration programme, reducing near-term financing risk
  • Up to 22 drill holes planned along >2 km mineralised corridor
  • Independent Competent Person Addison Mining Services engaged for JORC MRE
  • Multiple near-term catalysts: 750 kg bulk metallurgical results and drill assays in 2026

Negative

  • None.

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DUBLIN, IE / ACCESS Newswire / August 18, 2026 / Great Western Mining Corporation PLC (AIM:GWMO)(OTCQB:GWMOF), a strategic minerals exploration and development company, is pleased to announce that drilling has commenced at its Defender Tungsten Project in Mineral County, Nevada, USA ("Defender" or the "Project").

HIGHLIGHTS

  • Drilling underway to test grade an initial 600-1,000 metre corridor encompassing the Pine Crow, Dough God and Defender tungsten mines, collectively components of the Defender Tungsten Project.

  • Fully funded and on track to deliver a maiden Mineral Resource Estimate ("MRE") by the end of 2026, incorporating results from a minimum 7,000 feet (2,135 metre) drilling programme.

  • CEO Ed Loye and Lewis Harvey of Addison Mining Services ("Addison"), the independent Competent Person for the maiden JORC MRE, are on site for the start of drilling.

  • Drill assay results expected through September and October 2026.

  • Q2 2026 bulk sample metallurgical results expected in August 2026.

Great Western CEO, Ed Loye, commented: "It is great to see drilling now underway at Defender following a significant amount of preparatory work. From geophysics and geological mapping through to channel sampling and drill pad construction, a great deal of work has gone into reaching this stage and it is very satisfying to see it all come together.

"Lewis Harvey of Addison and I are both on site for the start of the programme, with Lewis overseeing the logging, sampling, data capture and quality control required for the maiden MRE. Having that oversight in place from the outset will help ensure an efficient transition from drilling through to resource estimation.

"Investors can look forward to a busy period of news flow, with results from the bulk sample metallurgical programme expected in the coming weeks, followed by drill assays through September and October. Taken together, this work keeps us firmly on track to deliver a maiden MRE by the end of 2026."

DETAILS

The Defender Tungsten Project comprises the historic Widowmaker, Pine Crow, Dough God and Defender tungsten mines, located along a >2km mineralised corridor in Mineral County, Nevada. Great Western's exploration work to date, including geophysics, geological mapping, trenching and surface sampling, has identified tungsten mineralisation across the Project and provided the basis for a resource drilling programme.

The minimum 7,000 feet (2,135 metre) programme commenced yesterday, 17 August 2026, and will comprise up to 22 drill holes. It is designed to test the continuity and grade of tungsten mineralisation across part of the Defender corridor and generate the geological data required to support a maiden Mineral Resource Estimate ("MRE").

As announced on 4 August 2026, the Company has engaged Addison Mining Services as the independent Competent Person responsible for the development of the maiden MRE. Lewis Harvey, Director Exploration Services & Principal Geologist of Addison, is on site overseeing core logging, sampling protocols, data capture and quality assurance throughout the drilling programme.

CEO Ed Loye is also on site for the commencement of drilling. Assay results from the programme are anticipated through September and October 2026.

In parallel, the Company is awaiting results from the 750 kg representative metallurgical bulk sample sent to Eriez in Pennsylvania for flotation test work, as announced on 1 June 2026. Results are expected in August 2026.

The Company remains fully funded for its 2026 exploration programme and on target to deliver a maiden MRE by the end of 2026.

For further information visit www.greatwesternmining.com or contact:

Great Western Mining Corporation PLC

Brian Hall, Chairman

c/o St Brides

Ed Loye, CEO

greatwesternmining@stbridespartners.co.uk

Davy

Nominated Adviser, Euronext Growth Adviser & Joint Broker

Brian Garrahy

+353 (0)1 679 6363

Shard Capital Partners

Joint Broker

Andrew Gutmann / Erik Woolgar

+44 (0)20 7186 9008

St Brides Partners

Financial PR

Susie Geliher / Isabel de Salis

greatwesternmining@stbridespartners.co.uk

Notes

Great Western Mining Corporation PLC (AIM:GWMO)(OTCQB:GWMOF) is an exploration and development company focused on strategic minerals across several 100%-owned claim groups in Mineral County, Nevada, a highly prospective and mining-friendly jurisdiction. The Company has an increasing strategic emphasis on tungsten as a critical mineral, while continuing to advance its Huntoon Copper Project, which hosts a JORC-compliant resource of 4.3 Mt at 0.45% Cu with further porphyry upside. It also maintains exposure to gold and silver through exploration and tailings reprocessing opportunities, alongside evaluating farm-out and joint venture options to unlock wider portfolio value.

Forward Looking Statements

This announcement contains forward looking statements relating to the plans, activities and expectations of Great Western Mining Corporation PLC. Such statements include, but are not limited to, those concerning planned exploration programmes, anticipated timelines and potential mineral resource outcomes. Forward looking statements are typically identified by words such as "plan", "expect", "anticipate", "intend", "may", "could", "potential" or similar expressions.

These statements are based on current expectations and assumptions and involve risks and uncertainties that could cause actual results to differ materially. Factors include geological risk, exploration and drilling results, permitting and regulatory approvals, funding availability, operational challenges, commodity price movements and general market conditions. No assurance can be given that any forward looking statements will prove to be accurate, and shareholders are cautioned not to place undue reliance on them.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

SOURCE: Great Western Mining Corporation PLC



View the original press release on ACCESS Newswire

FAQ

What did Great Western Mining (GWMOF) announce about the Defender Tungsten Project on 18 August 2026?

Great Western Mining announced that drilling has started at the Defender Tungsten Project in Nevada. According to Great Western Mining, the programme will feed into a maiden JORC Mineral Resource Estimate targeted for completion by the end of 2026, subject to successful data collection.

How large is the drilling programme at Great Western Mining’s Defender Tungsten Project (GWMOF)?

The Defender drilling programme covers a minimum of 7,000 feet (2,135 metres) in up to 22 holes. According to Great Western Mining, it will test tungsten continuity and grade across part of a more than 2 km mineralised corridor hosting several historic mines.

When will GWMOF expect assay and metallurgical results from the Defender Tungsten Project?

Great Western Mining expects drill assay results during September and October 2026. According to Great Western Mining, metallurgical flotation test results from a 750 kg bulk sample sent to Eriez in Pennsylvania are anticipated in August 2026, providing important processing information.

Who is the Competent Person for Great Western Mining’s maiden MRE at Defender (GWMOF)?

Addison Mining Services is the independent Competent Person for the maiden JORC Mineral Resource Estimate. According to Great Western Mining, Addison’s Director Exploration Services, Lewis Harvey, is on site overseeing core logging, sampling protocols, data capture and quality assurance during the Defender drilling programme.

Is Great Western Mining (GWMOF) fully funded to complete the 2026 exploration at Defender?

Yes, the company reports that it is fully funded for its 2026 exploration programme. According to Great Western Mining, this funding position supports completion of the Defender drilling, metallurgical test work and the targeted maiden JORC Mineral Resource Estimate by the end of 2026.

What other projects does Great Western Mining (GWMOF) hold alongside the Defender Tungsten Project?

Great Western Mining also advances the Huntoon Copper Project, hosting a JORC resource of 4.3 Mt at 0.45% Cu. According to Great Western Mining, it maintains exposure to gold and silver and is evaluating farm-out and joint venture options across its Nevada claim groups.