Change of Nominated Adviser

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

2 June 2026

GREAT WESTERN MINING CORPORATION PLC

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

Change of Nominated Adviser

Great Western Mining Corporation PLC, the exploration and development company focused on mineral projects in Nevada, USA, announces that following an internal restructuring of Davy Group companies, the Company announces that it has changed its Nominated Adviser from Davy Corporate Finance to J&E Davy, with immediate effect.

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 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.