New Corporate Presentation

REACH

16^th September 2025

GREAT WESTERN MINING CORPORATION PLC

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

New Corporate Presentation

Great Western Mining Corporation PLC (AIM - GWMO, Euronext Growth - 8GW) is pleased to announce that a new Corporate Presentation can be viewed on its website at https://www.greatwesternmining.com/investors/company-presentations/.  No material new financial or other information has been disclosed.  

The presentation outlines Great Western's investment proposition which is built on four key pillars:

• Advance the Huntoon Copper Project - expand the JORC resource and test high-impact porphyry targets.
• Fast-Track Critical Minerals - advance tungsten and other assets aligned with U.S. strategic supply priorities
• Unlock Value via Partnerships - use JVs and farm-outs to fund growth and minimise dilution.
• Monetise Precious Metals - reprocess historic mine material and progress gold/silver discoveries toward commercial scale.

**ENDS**

For further information:

Great Western Mining Corporation PLC (AIM: GWMO / Euronext Growth: 8GW) is a diversified exploration and development company focused on strategic metals across eight 100%-owned claim groups in Mineral County, Nevada - one of the world's most prolific and mining-friendly jurisdictions. Backed by an experienced team, the Company is pursuing a multi-commodity strategy targeting near-term development and longer term exploration while assessing farm-out and joint venture opportunities to unlock broader portfolio value. As well as its flagship Huntoon Copper Project, which hosts a JORC-compliant resource of 4.3 Mt at 0.45% Cu, with upside from undrilled porphyry targets, it has a pipeline of gold, silver, and early-stage tungsten assets aligned with US critical minerals priorities.