Anglesey Mining Plc · LSE:AYM
Anglesey Mining — Corporate Update (July 2025)
17 slides from Anglesey Mining's corporate update, Jul 30, 2025
Slide 1: High-Density Hydro: Parys Mountain pumped hydro energy storage
HIGH-DENSITY HYDRO® Parys Mountain high-density pumped hydro energy storage, as a facilitator of mine construction, securing a UK source of critical minerals
Slide 2: The Joint Venture
Anglesey Mining plc is engaged in exploring and developing its Parys Mountain property which hosts a significant polymetallic zinc, copper, lead, silver and gold deposit where there is a head frame, a 300m deep production shaft, planning permission for operations and freehold ownership of the minera
Slide 3: About the Team
About the Team Rob Marsden Director & CEO, Anglesey Mining Local Support from: Rob is a mining executive with nearly 30 years of global experience and currently CEO of Anglesey Mining. Held previous roles at Rio Tinto and as an independent consultant on US$100+ million projects across copper, diamon
Slide 4: Parys Mountain, Copper, Zinc, Lead, Silver Gold deposit
Parys Mountain, Copper, Zinc, Lead, Silver Gold deposit Preliminary Economic Assessment, released in Jan-2021 – Mining commences with spiral decline from surface Combined Resource – 16.1Mt @ 1.0% Cu, 1.3% Zn, 0.7% Pb, 15g/t Ag & 0.2g/t Au (1.9% CuEq for 674Mlb CuEq / 5.4% ZnEq for 1.92Blbs ZnEq ) •
Slide 5: Potential for Parys Mountain to Grow
Potential for Parys Mountain to Grow Parys Mountain compared to Golden Grove (WA, Aus) and Rosebery (Tas, WA) Parys Mountain Golden Grove Rosebery ~17Mt ~48Mt ~50Mt U/G Discovered – 1962 Discovered – 1971 Discovered – 1893 Opened - 1990 Opened - 1936 ? ? ? ? • The underground resources were all disc
Slide 6: Utilizing existing underground workings as pumped hydro energy store overcomes barriers to mine funding
Utilizing existing underground workings as a pumped hydro energy store overcomes several barriers to mine funding: High fixed costs and Revenue is dependent Shallow pool of qualified Of 30 industrialised unscalable capital of on cyclic nature of investors for mining countries, the UK has the plant a
Slide 7: Why this catalyst project matters: The LDES imperative
Why this catalyst project matters: The LDES imperative “Long duration electricity storage (LDES) will be pivotal in delivering a smart and flexible energy system that can integrate high volumes of low carbon power, heat, and transport.” DESNZ, March 2025 National priority Grid stability LDES is crit
Slide 8: The opportunity: Parys Mountain high-density pumped hydro
The opportunity: Parys Mountain high-density pumped hydro World’s first commercial-scale high-density pumped hydro facility Wylfa nuclear ▪ Strategic asset: Dispatchable grid firming services and local power station Amlwch minerals vital to the energy transition, including Welsh gold (decommissioned
Slide 9: The project: High-density pumped hydro system
The project: High-density pumped hydro system Using existing mine workings 1 Upper reservoir: High-density fluid stores about Local wind 70 MWh of energy potential in tanked reservoir and solar (wave and tidal 5 in future) Parys Mountain mine head frame 2 Turbines: Generate 5 MW of dispatchable elec
Slide 10: UK innovation: RheEnergise high-density fluid technology
UK innovation: RheEnergise high-density fluid technology 2.5× high energy density than conventional pumped hydro systems High-density fluid technology ▪ Proprietary high-density fluid, called R19 ▪ Non-toxic, non-corrosive, non-reactive ▪ Repurposes local mine tailings ▪ Pilot plant being commission
Slide 11: A catalyst investment: Paves the way for further mineral exploration and pumped hydro
A catalyst investment: Paves the way for further mineral exploration and extraction and pumped hydro storage schemes Grid firming Four key catalysts : Stabilises local wind and solar energy. ▪ Accessible and stable underground space ▪ Local (intermittent) Electric-powered mining renewable energy Com
Slide 12: A world first: Active mining and energy storage integration
A world first: Active mining and energy storage integration Mining method adapted to house a pumped-hydro energy storage scheme, shaft used for ventilation & secondary egress 1 Initial pumped hydro: existing mine Extraction of minerals critical workings will house the first storage system. Local win
Slide 13: Revenue: Diverse revenue streams with community upside
Revenue: Diverse revenue streams with community upside Grid stability services Frequency response and Capacity market payments Provision of energy Visitor centre voltage support generation assets ▪ Attract visitors to Anglesey ▪ Educational (STEM) attraction for students and organisations Mineral co
Slide 14: Right place, right time: Strong local support and potential blue-chip customers
Right place, right time: Leverages strong local support and access to potential blue-chip customers with grid capacity Strong local support as it: ▪ Supports job and Capacity: 360 MW solar PV Capacity: 4.6 MW wind Capacity: 6.6 MW wind Capacity: 49.9 MW solar PV economic growth Status: Planned Statu
Slide 15: The project aligns with UK government growth investment principles
The project strongly aligns with UK government growth investment principles 1: Supports the government's 2: Capital intensive projects, growth and clean energy missions businesses or assets. Will provide vital dispatchable grid This is a capital-intensive project where firming services to support in
Slide 16: Example sources of Governmental support
Example sources of Governmental support: Potentially non-dilutive funding for the energy storage project The Energy Island Programme Ambition North Wales - Clean Energy Fund National Wealth Fund Run by Anglesey County Council, Comprises of the six local authority areas UK wide, its aims are to: coll
Slide 17: Contact Information
CONTACT INFORMATION +44 7531 475 111 rob.marsden@angleseymining.co.uk