The restart of the Hemerdon tungsten and tin mine in Devon, UK, is far more than a regional mining revival. It is rapidly becoming a strategic test case for Europe’s defence and industrial supply-chain resilience, at a time when access to critical minerals is increasingly shaped by geopolitics, export controls, and national security planning.
Unlike mainstream energy-transition metals such as copper, lithium, or nickel, tungsten plays a quieter but far more specialized role. It is a high-density, ultra-hard, high-melting-point metal used in environments where standard materials fail—ranging from defence systems and aerospace components to industrial tooling, semiconductors, and advanced manufacturing equipment. With global supply chains heavily concentrated in China, the Hemerdon project operated by Tungsten West has moved from a domestic mining restart into the category of strategic European supply infrastructure.
Tungsten: The Hidden Strategic Metal Behind Defence and Industry
Tungsten is often overlooked in critical minerals discussions, but its importance is growing rapidly. It is essential for:
- Defence applications, including armour-piercing systems and military tooling
- Aerospace components requiring extreme heat resistance
- Industrial machining and cutting tools
- Energy sector equipment and drilling systems
- Semiconductor manufacturing tools
Because tungsten cannot be easily substituted in many high-performance applications, it has become a strategic dependency risk for Western economies, especially given China’s dominance in both mining and processing.
Hemerdon’s Strategic Importance in the Global Tungsten Market
The Hemerdon project is located near Plymouth in southwest England and is one of the most significant non-Chinese tungsten resources under development in the Western world.
Tungsten West estimates that once fully operational, Hemerdon could supply around 20% of global primary tungsten output outside China. This alone elevates the project from a standard mining asset to a strategic raw materials platform for Europe and allied economies.
The project has also been recognized under the EU Critical Raw Materials Act (CRMA) as a Strategic Project, despite being located outside EU borders. This reflects a broader geopolitical reality: Europe’s resource security is increasingly tied to adjacent supply regions, including the UK, Norway, Greenland, and other allied jurisdictions.
A Restart Project Built on Existing Infrastructure
Unlike early-stage mining developments, Hemerdon is a brownfield restart project with substantial legacy infrastructure already in place.
Historical investment exceeding US$300 million has already been deployed into:
- Open pit development
- Processing facilities
- Tailings and waste systems
- Workshops and site infrastructure
This significantly reduces the time and capital required to reach production compared to greenfield projects. Tungsten West estimates that full restart requires around US$93 million, focused on upgrading processing systems, installing ore sorting technology, refurbishing plant infrastructure, and implementing environmental controls.
Production Plan and Long-Term Output Potential
Once fully operational, Hemerdon is designed to become a large-scale polymetallic operation with both tungsten and tin production.
Key production expectations include:
- Processing capacity: 3.5 million tonnes of ore per year
- Tungsten output: approximately 332,000 MTU of WO₃ annually
- Tin output: around 462 tonnes per year
- Additional revenue from premium aggregate by-products
The mine hosts:
- Ore reserves of 70.7 million tonnes
- Contained tungsten: ~10.3 million MTU WO₃
- Total mineral resource: 326.8 million tonnes
This makes Hemerdon one of the largest undeveloped tungsten resources in Europe.
Financing Structure and Restart Timeline
Tungsten West has adopted a staged financing and restart strategy rather than relying on a single capital injection.
Recent developments include:
- A US$25 million bridging loan secured in 2026
- A larger debt package of up to US$85 million under final documentation
- A phased restart program spanning 2026–2027
Planned commissioning timeline:
- Q3 2026: fines gravity circuit restart
- Q4 2026: coarse gravity circuit restart
- Q1 2027: full plant commissioning
- 2027 onward: ramp-up to nameplate capacity
This structured approach reduces execution risk while enabling gradual production scaling.
Processing Redesign: Fixing Legacy Failures
Hemerdon’s earlier operational history was marked by processing inefficiencies, recovery challenges, and environmental constraints.
The restart strategy focuses heavily on redesigning the processing flowsheet, including:
- New crushing and screening systems
- Ore sorting technology for pre-concentration
- In-line gravity separation improvements
- Refurbished plant modules
- Improved stockpile blending and material handling
The objective is not simply to restart production, but to build a fundamentally more efficient and reliable processing system based on lessons learned from the previous operation.
Environmental and Community Constraints
A key feature of the Hemerdon restart is its focus on noise and environmental mitigation, reflecting modern UK planning expectations.
Measures include:
- Enclosed processing facilities
- Reduced noise emissions from crushing systems
- Modified mining truck equipment
- Sunken processing units
- Reduced operating hours for high-noise stages
Given the mine’s proximity to local communities near Plymouth, social license to operate is a critical factor, not just a regulatory requirement.
Labour Build-Up and Operational Readiness
Tungsten West has begun scaling operations ahead of restart:
- Over 120 new employees expected to be onboarded
- Heavy mining equipment already deployed on site
- Mobile crushing and washing services contracted
- Preparatory mining operations underway
This signals a transition from development phase into pre-production execution mode.
Market Context: Why Tungsten Matters More Now
The global tungsten market is increasingly shaped by supply concentration risk, particularly due to China’s dominance in mining and processing.
China’s control over tungsten, rare earths, graphite, and other critical minerals has highlighted a structural vulnerability in Western supply chains.
Tungsten is especially sensitive because it sits at the intersection of:
- Civilian manufacturing
- Industrial engineering
- Defence production
This dual-use profile places tungsten at the center of NATO-aligned industrial resilience strategies and European stockpiling discussions.
EU Critical Minerals Policy and Strategic Stockpiling
The European Union has begun preparing a joint strategic stockpile of critical raw materials, including tungsten, rare earths, and gallium.
While stockpiling does not replace production, it:
- Signals structural supply risk
- Increases long-term demand visibility
- Strengthens the case for regional projects like Hemerdon
- Encourages diversification away from single-source dependency
In this framework, Hemerdon is not just a mine—it becomes part of a regional supply security architecture.
Financial Case: Strong Returns but Execution-Dependent
Tungsten West’s restart plan outlines:
- Post-tax NPV: US$190 million
- IRR: 29.3%
- Life-of-mine free cash flow: US$456 million
However, these projections depend heavily on:
- Successful commissioning
- Stable recovery rates
- Cost control during ramp-up
- Market tungsten prices
- Offtake agreements
The company assumes a tungsten price of around US$400 per MTU, though market volatility remains a key risk factor.
Offtake Agreements and Strategic Demand
Offtake negotiations are already underway with multiple potential buyers.
Securing long-term contracts is critical because in the critical minerals sector, customer identity is as important as price. Defence-related or industrial-grade buyers could provide:
- Revenue stability
- Financing support
- Improved bankability
- Strategic supply validation
Strategic Importance for the UK and Europe
Hemerdon is one of the few UK-based projects capable of near-term production in a critical defence-related mineral.
Alongside projects like South Crofty (tin), it represents a broader trend: Europe’s re-entry into strategic mining is likely to be driven by brownfield restarts rather than greenfield discoveries.
For Europe, Hemerdon aligns with:
- Industrial policy under the Critical Raw Materials Act
- Defence supply chain resilience strategies
- Energy transition infrastructure needs
- Diversification away from Chinese supply dominance
