Mushima North Drilling

Further to its announcement of 23 September 2024, the Company is pleased to advise that the Company's inaugural drill programme at its Mushima North Copper Project in Zambia has now been completed.

Summary:

• Drilling aimed to test the A1 and C1 coincident copper, zinc and arsenic soil anomalies defined by the Company's soil sampling programmes completed in 2023 (see announcements dated 5 October and 16 October 2023 for further details).
• Twenty-five aircore/reverse circulation drillholes completed to a maximum depth of 112m.
• Three drill traverses completed at anomaly A1, one drill traverse at anomaly C1.
• Portable X-Ray Fluorescence ("pXRF) analysis of drill samples now being completed, together with QA/QC checks. Selected samples will also be sent to an independent laboratory for check analysis.
• pXRF analytical results will be released as soon as possible.

A plan showing the location of Mushima North drill holes can be found at the end of this release.

Patrick Cheetham, Executive Chairman of Tertiary Minerals plc said:

"Our inaugural drill programme at Mushima North went smoothly and was extremely successful, meeting its objectives in full. The Mushima North area is quite remote and largely inaccessible for exploration during the wet season, so we are pleased to have completed the drill programme and demobilised the drill equipment before the onset of the rains."