Great Western Mining Corporation PLC / AIM: GWMO / Euronext Growth: 8GW

16 April 2026

GREAT WESTERN MINING CORPORATION PLC

("Great Western", "GWM" or the "Company")

Drilling Contractor Secured for Defender-Pine Crow Tungsten Project

Great Western, the exploration and development company focused on mineral projects in the state of Nevada, USA, is pleased to announce that it has signed a contract with Major Drilling America, Inc. ("Major Drilling America") to undertake a drilling campaign at its 100%-owned Defender-Pine Crow Tungsten Project in Mineral County, Nevada ("Defender-Pine Crow" or the "Project").

Defender-Pine Crow is the Company's primary focus for the coming months, following highly encouraging assay results from a machine-cut channel sampling programme announced in January 2026.  The upcoming reverse circulation ("RC") drilling programme, planned for approximately 7,000 ft, is designed to support progress towards a maiden Mineral Resource Estimate ("MRE"), targeted for Q4 2026. The programme will also test the scale and continuity of the mineralised system between Defender and Pine Crow, including its potential relationship to the broader copper and tungsten mineralised trend extending towards M2, located more than 3 km to the southwest.

Groundworks are scheduled to commence in May 2026 to prepare drill pads, with drilling by Major Drilling America expected to begin in July 2026.

Major Drilling America, based in Salt Lake City, Utah, is part of Major Drilling Group International Inc., a leading provider of specialised drilling services to the global mining industry, with operations across North America, South America, Australia, Asia, Africa and Europe.

Great Western CEO, Ed Loye, commented: "Securing a drilling contractor ensures sustained momentum for our active exploration programme at Defender-Pine Crow as we work towards delineating a maiden tungsten MRE by the end of 2026.

"While drilling is a key component of this programme, we are progressing multiple workstreams in parallel. We are currently analysing detailed geological mapping and geophysical survey data collected in recent weeks to better understand the mineralised trend between Defender and the Company's existing MRE at M2. The results of this work will be reported in due course as will results from further assay results from further channel sampling, which will be incorporated into our evolving exploration model.

"Overall, activity at Defender-Pine Crow is accelerating at a pleasing rate, and we look forward to updating the market as this emerging tungsten discovery continues to develop."

**ENDS**

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

Notes

Great Western Mining Corporation PLC (AIM: GWMO / Euronext Growth: 8GW) 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 flagship 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.