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13 July 2023

Great Southern Copper plc

("GSC" or the "Company")

Appointment of CFO

Great Southern Copper plc (LSE: GSCU), the company focused on copper-gold exploration in Chile, is pleased to announce the appointment of Martin Page as Chief Financial Officer ("CFO") and as a member of the Board, effective from 1 August. Paul Williams will be retiring from his position as CFO on 1 August.

Mr Page, (46), is an experienced CFO, predominantly in the natural resources sector, with exposure to all elements of the value cycle including exploration and operating assets. He has extensive experience of capital and debt markets, statutory and management reporting requirements and detailed tax and treasury planning.

Mr Page joins having previously been CFO at Trident Royalties plc, an AIM quoted junior mining royalty company, where he presided over an increase in the company's market cap from c.$40 million to c.$200m. In this role, Mr Page was responsible for oversight and management of the Group's finances, negotiation of debt financing and the deployment of over US$100m in capital across several large deals. Prior to that he held the position of CFO at Toro Gold, a group that owned and operated the Mako Gold mine in Senegal, which was sold to Resolute Mining for in excess of US$300m in 2019.

Charles Bond, Chairman of Great Southern Copper, said: "We are thrilled to welcome Martin as our new CFO. Martin brings with him more than a decade of experience in finance within the natural resources sector. We look forward to him leveraging his extensive expertise within capital markets and corporate finance at this very exciting time for the Company. I would also like to thank Paul for all of his excellent work for the Company and we wish him the best in his retirement."

Martin Page, incoming CFO of Great Southern Copper, said: "I am delighted to be joining Great Southern Copper and excited to help progress their very promising early-stage exploration assets in Chile. The importance of developing new copper supplies to help facilitate the net-zero transition is becoming increasingly clear and I am happy to be a part of the Company as we look to help bridge this widening supply gap and generate sustained value for shareholders."

There is no further information required to be disclosed in relation to Mr. Page pursuant to Listing Rule 9.6.13.

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About Great Southern Copper

Great Southern Copper is a mineral exploration company focused on copper-gold deposits in Chile. The Company has the option to acquire rights to 100% of two projects that are prospective for large scale copper-gold deposits in the underexplored coastal belt of Chile, a globally significant mining jurisdiction and the world's largest copper producer.

The two projects comprise the San Lorenzo Project, northeast of the coastal town of La Serena in northern Chile, and the Especularita Project located approximately 170km to the south of the San Lorenzo project. The two early-stage Cu-Au exploration projects are within the same coastal metallogenic belt as other major deposits including Teck's Andacollo copper and gold mine. Significant historical small-scale and artisanal workings for both copper and gold are readily evident in both exploration project areas.

Great Southern Copper is strategically positioned to support the global market for copper, a key metal in the clean energy transition around the world. The Company is actively engaged in a two-year exploration and evaluation work programme targeting principally large tonnage, low to medium grade porphyry style Cu-Au deposits.

Further information on the Company is available on the Company's website: https://gscplc.com