Establishment of drilling site complete

20 August 2025

First Development Resources plc

('First Development", "FDR" or the "Company')

Establishment of site access and drill platform complete

First Development Resources plc (AIM: FDR) a UK based, Australian focused exploration company with mineral interests in Western Australia and Australia's Northern Territory, is pleased to announce that the drilling platform and site access has been established (Figure 1) to facilitate the Company's Phase I diamond drilling programme at its Wallal Project in the Paterson Province of Western Australia.

Figure 1:FDR Wallal Phase I diamond drilling site preparation, Paterson Province, Western Australia, August 2025

Over the coming days, the Company's drilling partner DDH1 Drilling Pty Ltd, will establish its camp ahead of rig mobilisation and the commencement of drilling.

For further information visit www.firstdevelopmentresources.com or contact the following:

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ABOUT FIRST DEVELOPMENT RESOURCES

First Development Resources' assets comprise eight granted tenements covering a total area of 2,314.4km2. Five of the tenements, comprising three prospective copper-gold projects, are located in Western Australia (WA) while the remaining three tenements, comprising a rare-earth element (REE), uranium, lithium and gold project, are located in the Australian's Northern Territory. All tenements are wholly owned by FDR. The assets are a mixture of drill ready and earlier stage exploration.

The WA Projects include the Company's flagship Wallal Project as well as Ripon Hills and Braeside West Projects situated in the Paterson Province, which is widely regarded as one of the most productive regions in Australia for the discovery of world-class gold-copper deposits, and which is home to several world-class mines and more recent discoveries.

The Selta Project in the Northern Territory is located in an area considered highly prospective for uranium and rare-earth element mineralisation along with base and precious metal mineralisation. Numerous companies are actively exploring within the region.

Beyond the existing portfolio, FDR is actively looking to expand its portfolio through the acquisition of early-stage exploration projects in Australia.