23 October 2025

Metals One Plc

("Metals One" or the "Company")

Binding Agreement to Treat Uranium Waste Dumps with DISA Technologies

Further to the announcement on 4 September 2025 regarding a term sheet with DISA Technologies, Inc. ("DISA") in respect of Metals One's 75%-owned Radium Mountain and Wedding Bell uranium claims in Colorado (the "Colorado Projects"), Metals One (AIM: MET1), a critical and precious metals exploration and development company, is pleased to provide the following update.

Standard Minerals Inc. ("Standard"), the holder of the Colorado Projects and a 75% owned subsidiary of Metals One, has now signed a Binding Agreement (the "Agreement") with DISA to, as announced before, seek to evaluate and, if successful, treat historically abandoned uranium mine waste dumps ("waste") and recover saleable uranium and other critical minerals concentrates at the Colorado Projects.

Highlights:

·    Full Binding Agreement whereby Standard is to be paid a Gross Revenue Share of any saleable uranium and other critical mineral concentrates recovered from waste at its Colorado Projects via deployment of DISA's modular mobile plants utilising the patented High-Pressure Slurry Ablation ("HPSA") system

·    DISA has now received its final U.S. Nuclear Regulatory Commission ("NRC") Service Providers License ("SPL") to remediate abandoned uranium mine waste

·    No capex or opex payable by Standard

·    13 separate prospective waste dumps have been ground surveyed at the Colorado Projects - others may be added to this inventory over time

·    Standard to receive a percentage of gross product sale revenue stream, minus certain post-treatment allowable costs. A sliding scale with a base rate of 2.5%, through to 4.0% in certain metals pricing environments

·    DISA will be the operator of the Colorado Projects and pay all associated costs of economic evaluation, permitting, treatment and ongoing remediation

·    DISA expects to initiate a detailed site characterisation programme in 2026 to evaluate resource potential - results will inform the timing and scope of future uranium recycling activities

Dan Maling, Managing Director of Metals One, commented:

"Signing this Binding Agreement means that Metals One is on track to go from waste to potential development at two of our uranium projects within 12-24 months. DISA is in the business of remediating historically abandoned uranium mine waste dumps, and it is now the first company in the U.S to have received a Service Providers License for this work from the U.S. Nuclear Regulatory Commission. We believe their patented HSPA technology makes both economic and environmental sense, recovering valuable uranium and critical minerals whilst rehabilitating historic sites."

Advantages of HPSA:

·    The HPSA process treats surface dumps of previously partially mined and aggregated material

·    DISA has been working with the U.S. NRC since 2021 on a robust licensing process, which has now concluded, making DISA the first company to receive an SPL to remediate abandoned uranium mine waste

·    Aside from extracting valuable uranium and critical minerals, the process delivers significant improvements to the local environment and watersheds by removing, on average, 90% of the uranium and radium-226 content from the waste, as evidenced by a treatability study DISA completed with the U.S. Environmental Protection Agency

·    Strong US Government support for domestic recovery of uranium and critical minerals from legacy mine waste. This activity is directly in line with the recent Secretarial Order from the Department of the Interior (Order No. 3436: Unlocking Critical and Strategic Minerals from Mine Waste, Cutting Red Tape, and Restoring American Dominance in Strategic Mineral Production)

Next Steps:

·    Characterisation programme with a combination of assay and gamma probe to determine likely quantities of uranium and other recoverable minerals present in the waste dumps and economic evaluation scheduled for 2026

·    Application and completion of all requisite local permits needed to commence treatment of waste and recovery of payable concentrates using HPSA technology

·    Future potential sale of metals concentrates and payment of gross revenue to Metals One via Standard. Potential revenue cannot yet be quantified until assay and gamma probe programs are performed

Enquiries:

About Metals One

Metals One is pursuing a strategic portfolio of critical and precious metals projects underpinned by the Western World's urgent need for reliably and responsibly sourced raw materials, and record high gold prices. Metals One's shares are listed on the London Stock Exchange's AIM Market (MET1).

Map of Metals One projects/investments

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Market Abuse Regulation (MAR) Disclosure

The information set out below is provided in accordance with the requirements of Article 19(3) of the Market Abuse Regulations (EU) No. 596/2014 which forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 ('MAR').

Nominated Adviser

Beaumont Cornish Limited ("Beaumont Cornish") is the Company's Nominated Adviser and is authorised and regulated by the FCA. Beaumont Cornish's responsibilities as the Company's Nominated Adviser, including a responsibility to advise and guide the Company on its responsibilities under the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed solely to the London Stock Exchange. Beaumont Cornish is not acting for and will not be responsible to any other persons for providing protections afforded to customers of Beaumont Cornish nor for advising them in relation to the proposed arrangements described in this announcement or any matter referred to in it.

About DISA Technologies

Founded in 2018, DISA Technologies is revolutionizing mineral recovery with its patented High-Pressure Slurry Ablation (HPSA) technology-an innovative solution that upgrades critical minerals from mined ore and legacy waste. Serving both the mining and remediation sectors, they recover valuable resources that power industry, strengthen energy independence and restore contaminated sites to productive use. DISA's technology unlocks economic and environmental value, transforming how the world processes, remediates and recycles essential mineral assets. DISA is headquartered in Casper, Wyoming, with a satellite office in Westminster, Colorado. For more information, visit www.DISAusa.com.