Cornish Metals raises £135m to reopen South Crofty tin mine
Cornish Metals has opened a £135 million equity fundraising to restart South Crofty, the historic tin mine near Camborne that closed in 1998. The company aims to reach first production by mid-2028. Alongside the capital raise, a new six-year offtake agreement with Glencore provides a route to market for the mine's future tin concentrate output.
The fundraising comes at a decisive moment for the project. Cornish Metals completed a US$210 million bond issue in May 2026, but those funds remain locked in escrow. The company must raise at least US$161 million in equity by 21 November to unlock the bond proceeds, unless bondholders agree to extend the deadline. Without the equity raise, the company cannot access the debt finance it needs to continue.
This is not exploration funding. The capital is intended to pay for underground development, shaft refurbishment, surface infrastructure and processing facilities. Total estimated capital expenditure for South Crofty stands at £185 million. The company's wider financing plan totals approximately £302 million, including construction costs, conversion of shareholder loans and bond interest during the production ramp-up.
South Crofty's role in UK critical minerals supply
South Crofty operated intermittently for centuries before shutting down in 1998. It was Cornwall's last working tin mine. The UK government now considers tin a critical mineral because of its use in solder, electronics, renewable energy equipment and advanced manufacturing. Domestic production would reduce reliance on overseas sources and provide a local feedstock for downstream industries.
Tin is essential for electrical connections. Consequently, it appears in consumer electronics, solar panels, electric vehicle components and artificial intelligence hardware. The metal's importance to electrification and digital infrastructure has made supply security a policy priority. However, the UK currently imports nearly all its tin.
A single mine will not eliminate that dependence. Nevertheless, South Crofty could provide a domestic source of tin concentrate and reduce exposure to international supply disruptions. The project has therefore attracted support from the National Wealth Fund, which views it as strategically important.
Structure and timing of the £135 million equity raise
The fundraising is being conducted at 60 pence per share. This represents a significant discount to the company's recent market price. The structure includes institutional subscriptions, direct investments by strategic shareholders and a retail offer for individual investors.
Key commitments announced so far include a conditional £11.2 million subscription from Glencore International. The National Wealth Fund is expected to subscribe for up to 29.5% of the total raise. Leonidsport, an investment vehicle linked to the Louis-Dreyfus family, has committed £13.35 million. Directors and other investors plan to contribute a combined £1 million.
At 60 pence per share, the proposed £135 million raise would issue roughly 225 million new shares. For context, approximately 125.5 million shares were outstanding at the end of June 2026. Existing shareholders will therefore face substantial dilution. However, the discounted price may be necessary to attract the capital required within the tight deadline.
Completion of the equity raise is essential. Failure to meet the US$161 million threshold by 21 November could prevent the company from accessing its bond proceeds. In that scenario, Cornish Metals would struggle to meet its debt obligations or continue operating on its current basis.
Debt facilities and the National Wealth Fund's involvement
The equity raise forms part of a broader financing package. In May 2026, Cornish Metals completed a US$210 million bond issue. Those proceeds remain in escrow pending satisfaction of certain conditions, including the equity raise. Additionally, the National Wealth Fund and Vision Blue Resources have provided debt facilities totalling up to £35 million and US$22.75 million respectively.
The National Wealth Fund has played a central role in supporting South Crofty. It previously provided a £28.6 million cornerstone investment. Later, it announced a further £35 million shareholder loan to support redevelopment. The fund's expected participation in the current equity raise underscores the government's strategic interest in the project.
This multi-layered financing structure reflects the scale of capital required to restart a flooded historic mine. It also highlights the execution risk. Each piece of funding depends on others being completed. The equity raise unlocks the bond proceeds. The bond proceeds enable construction. Construction leads to production. Any delay or shortfall in one area could disrupt the entire sequence.
Glencore offtake agreement secures a commercial partner
South Crofty Ltd has signed a six-year offtake agreement with Glencore covering 100% of the mine's planned tin concentrate production. The agreement includes a minimum aggregate delivery volume of 27,513 metric tonnes of contained tin. Deliveries are expected to begin when commercial production starts in 2028.
In addition, the parties have signed heads of terms for a US$10 million revolving working capital facility. This could provide additional liquidity once the project enters its operating phase. The Glencore agreement is significant because it establishes an established commercial partner and a planned buyer for the mine's output.
Nevertheless, an offtake agreement does not remove the risks of construction, commissioning or commodity price volatility. The mine must still be built and operated successfully before it can deliver on its commitments. Furthermore, the agreement's value depends on production volumes, recovery rates and the eventual tin price achieved in the market.
What the project means for UK manufacturing and supply chains
For businesses that rely on tin, the prospect of a domestic source matters. Companies in electronics, automotive, renewable energy and defence sectors all use tin in their products. Most currently source it from overseas, often through complex supply chains involving multiple intermediaries.
A producing UK mine would offer an alternative. It would provide traceability, reduce lead times and limit exposure to geopolitical disruption. For manufacturers seeking to de-risk their supply chains, having a local source could strengthen tender submissions, particularly in public procurement where supply security is increasingly assessed.
The project also has implications for Cornwall's economy. Construction activity, skilled employment and long-term industrial investment would return to a region historically defined by mining. The mine's eventual workforce, supply chain and tax contribution could all support local economic development. However, these benefits depend on the project reaching production and operating sustainably.
From a compliance perspective, companies using tin concentrate from South Crofty may find it easier to meet due diligence requirements under conflict minerals regulations. A UK-based source simplifies traceability and reduces the administrative burden associated with verifying the origin of imported materials.
Risks and challenges still to be addressed
Despite the scale of the proposed financing, South Crofty is not yet an operating mine. The company must still complete the financing package, satisfy bond conditions and obtain or maintain necessary regulatory consents. Underground and shaft works must be finished. Processing infrastructure must be constructed and commissioned. Technical risks associated with restarting a flooded historic mine must be managed.
The financial structure creates significant execution pressure. The proposed share issue is not simply an expansion of the balance sheet. It is an essential step toward unlocking the bond proceeds held in escrow. Missing the deadline or falling short of the equity target could jeopardise the entire financing plan.
Operational risks also remain. The mine has been closed for more than 25 years. Water ingress, ground stability, ventilation, ore recovery rates and processing efficiency all carry uncertainty. The company must demonstrate that South Crofty can operate competitively within a modern, lower-carbon supply chain. That means controlling costs, meeting environmental standards and achieving the production targets on which the financial model depends.
Key details for businesses tracking the project
- Cornish Metals is raising £135 million in equity at 60 pence per share to advance the South Crofty tin mine redevelopment.
- The fundraising must be completed by 21 November to unlock US$210 million in bond proceeds currently held in escrow.
- Total estimated capital expenditure for the project is £185 million, with first production targeted for mid-2028.
- A six-year offtake agreement with Glencore covers 100% of planned tin concentrate production, with minimum deliveries of 27,513 metric tonnes of contained tin.
- The National Wealth Fund is expected to subscribe for up to 29.5% of the equity raise, reflecting the project's strategic importance to UK critical minerals policy.
- South Crofty was the last working tin mine in Cornwall when it closed in 1998, and its reopening would provide the UK with a domestic source of a metal essential to electronics, renewable energy and manufacturing.
Strategic considerations for SMEs in affected sectors
Businesses in electronics, automotive, renewable energy and advanced manufacturing should monitor South Crofty's progress. If the mine reaches production, it will offer a domestic source of tin concentrate at a time when supply chain resilience is increasingly scrutinised in procurement processes. For companies bidding on public sector contracts, demonstrating access to UK-sourced critical minerals may become a competitive advantage under procurement policy note 06/21 and successor frameworks.
Manufacturers should also consider how a domestic tin supply could affect their carbon reporting. Imported tin often carries a significant embedded carbon footprint due to transport and overseas processing. A UK source, particularly one operating with renewable energy, could help reduce Scope 3 emissions. Companies preparing net-zero strategies may find that local sourcing options simplify their calculations and improve their reported performance.
For businesses in Cornwall and the South West, the project represents potential opportunities in the supply chain. Construction, engineering, logistics, environmental services and skilled trades will all be required during the development and operational phases. Companies with relevant capabilities should position themselves to bid for contracts as the project moves forward, particularly if they can demonstrate local employment and low-carbon practices.
However, businesses should not assume the project is certain. The financing is complex, the deadline is tight and the technical risks are real. Companies that rely on tin should maintain their existing supply arrangements until South Crofty is producing at scale. Diversification remains the prudent approach.
For firms involved in sustainable procurement, the project illustrates how critical minerals are becoming a focal point for industrial policy. Understanding these dynamics is essential for businesses that want to align their supply chains with government priorities. Similarly, companies working on carbon reporting compliance should track how domestic sourcing options could affect their Scope 3 calculations.
Where to find further information
The Department for Energy Security and Net Zero publishes the UK's critical minerals strategy and policy updates at gov.uk. This provides context on the government's approach to securing domestic supply of materials considered essential to net zero and advanced manufacturing.
Cornish Metals provides investor updates and project information on its corporate website. These announcements include details of the fundraising, offtake agreements and construction progress. The company is listed on the Toronto Stock Exchange and AIM, so regulatory filings are publicly available.
The National Wealth Fund, which is backing South Crofty, publishes information on its investments and strategic objectives. This can help businesses understand the criteria applied to projects receiving public support and the government's priorities in critical minerals development.
For businesses seeking to understand how domestic sourcing options fit into their own net-zero strategies, the SBS net-zero program offers guidance on carbon reduction, Scope 3 reporting and supply chain decarbonisation. Understanding these linkages is increasingly important as procurement requirements evolve.