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Great Western Mining Corporation PLC Announces Defender Tungsten Project Drilling Update

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Great Western Mining (OTCQB:GWMOF) announced that drilling at the Defender Tungsten Project in Mineral County, Nevada is expected to begin in the first half of August 2026, with all preparatory fieldwork and drill pad construction completed. Addison Mining Services has been appointed as independent Competent Person to develop a maiden JORC Mineral Resource Estimate, targeted for Q4 2026. Lewis Harvey of Addison will be on site throughout drilling to oversee core logging, sampling, data capture and quality assurance. Assay results from the drilling programme are anticipated through September and October 2026, alongside metallurgical results from a 750 kg bulk sample. According to Great Western, the company is fully funded for its 2026 exploration programme and remains on track to deliver the maiden MRE by the end of Q4 2026.

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Positive

  • Drilling start scheduled for Defender in first half of August 2026
  • Maiden JORC Mineral Resource Estimate targeted for delivery in Q4 2026
  • Addison Mining Services engaged as independent Competent Person for Defender MRE
  • Fully funded for the 2026 exploration programme, according to Great Western

Negative

  • None.

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Addison Mining Services Engaged as Competent Person Ahead of Imminent Drilling

DUBLIN, IRELAND / ACCESS Newswire / August 4, 2026 / Great Western Mining Corporation PLC (AIM:GWMO)(Euronext Growth:8GW)(OTCQB:GWMOF), a strategic minerals exploration and development company, is pleased to provide an update on the upcoming drilling programme at the Defender Tungsten Project ("Defender" or the "Project") in Mineral County, Nevada, USA.

HIGHLIGHTS

  • Drilling at Defender is expected to commence in the next two weeks, with all preparatory fieldwork now complete and drill pads constructed.

  • Addison Mining Services ("Addison") has been engaged as the independent Competent Person for the development of a maiden JORC Mineral Resource Estimate ("MRE") at Defender.

  • Lewis Harvey, Director Exploration Services & Principal Geologist of Addison, will be on site throughout the entire drilling programme to oversee data capture and quality control, streamlining the resource evaluation process and ensuring an efficient path to resource definition in Q4 2026.

  • Assay results from the drilling programme are expected through September and October 2026, in addition to results from the bulk sample metallurgical work conducted in Q2 2026.

Great Western CEO, Ed Loye, commented: "I am delighted to confirm that drilling at Defender is about to get under way. The preparatory work completed over recent months, including geophysics, geological mapping, trenching and drill pad construction, has given us invaluable information and the team is eager to build on this through drilling.

"The appointment of Addison as Competent Person is a significant step for the programme. I will be arriving on site this week to oversee the start of drilling and will be joined by Lewis Harvey of Addison, who will remain on site throughout the entire programme to ensure that data capture and quality control are embedded in the process from day one, rather than applied retrospectively. This is a more rigorous approach that we expect will result in a smoother, faster path to resource definition.

"The schedule for delivering a maiden MRE in Q4 2026 remains firmly on track. Looking ahead, investors can expect a steady flow of news over the coming months, with drilling assay results due through September and October alongside results from our Q2 bulk sample metallurgical programme. This will be a busy and high-impact period for the Company."

DETAILS
As previously announced, the Company has completed a comprehensive programme of preparatory fieldwork at Defender, including a detailed gravity geophysical survey, geological mapping and grab sampling across the mineralised corridor, and four machine-cut trenches at locations between the Defender, Pine Crow and Widowmaker Mines. Drill pad locations have been finalised and access roads between the Dough God Mine and Defender Mine have been prepared.

The Company has now engaged Addison Mining Services as the independent Competent Person responsible for development of the maiden MRE. Addison is a geological and mining consultancy providing high-quality consulting and contractor services to the global minerals industry. Its expertise spans a wide range of mineral projects including base and precious metals, industrial minerals and energy resources. Addison specialises in mineral resource and reserve estimation, exploration programme design and implementation, procedural audits and best practice operating procedure development, Competent Persons studies and reporting to JORC2012 and NI43-101 standards.

Lewis Harvey, Director Exploration Services & Principal Geologist of Addison, will be present on site throughout the drilling programme to oversee core logging, sampling protocols, data capture and quality assurance. This integrated approach is designed to ensure that all geological data meets the standards required for JORC-compliant resource estimation, reducing the risk of delays or data gaps during the resource evaluation phase.

Drilling is expected to commence in the first half of August. Assay results from the programme are anticipated through September and October 2026. These will be reported alongside results from the 750 kg representative metallurgical bulk sample previously sent to Eriez in Pennsylvania for flotation test work, as reported on 1 June 2026.

The Company remains fully funded for its 2026 exploration programme and on target to deliver a maiden MRE by the end of Q4 2026.

ENDS

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)(Euronext Growth:8GW)(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 August 4, 2026?

Great Western Mining announced imminent drilling at the Defender Tungsten Project and engagement of Addison Mining Services as Competent Person. According to Great Western, preparatory fieldwork and drill pad construction are complete, with a maiden JORC Mineral Resource Estimate targeted for delivery in Q4 2026.

When will drilling start at Great Western Mining’s Defender Tungsten Project (GWMOF) in Nevada?

Drilling at the Defender Tungsten Project is expected to commence in the first half of August 2026. According to Great Western, all preparatory fieldwork is complete and drill pads are constructed, enabling drilling to proceed on schedule as part of the company’s 2026 exploration programme.

When is Great Western Mining (GWMOF) expecting a maiden JORC Mineral Resource Estimate for Defender?

Great Western Mining is targeting delivery of a maiden JORC Mineral Resource Estimate for Defender in Q4 2026. According to Great Western, Addison Mining Services has been engaged as independent Competent Person to oversee data quality and streamline the resource evaluation process toward that timeline.

Is Great Western Mining (GWMOF) fully funded for its 2026 exploration programme at Defender?

Yes, Great Western Mining states it is fully funded for its 2026 exploration programme. According to Great Western, this funding underpins drilling at Defender, ongoing metallurgical test work, and the planned delivery of a maiden JORC Mineral Resource Estimate by the end of Q4 2026.

What is the role of Addison Mining Services in Great Western Mining’s Defender project (GWMOF)?

Addison Mining Services has been engaged as the independent Competent Person for Defender’s maiden JORC Mineral Resource Estimate. According to Great Western, Addison’s Lewis Harvey will be on site throughout drilling to oversee core logging, sampling protocols, data capture, and quality assurance for JORC compliance.

When will Great Western Mining (GWMOF) report drilling assay and metallurgical results for Defender?

Drilling assay results for Defender are expected through September and October 2026, with metallurgical results reported alongside. According to Great Western, these will include outcomes from a 750 kg representative bulk sample sent to Eriez in Pennsylvania for flotation test work.