Cornish Metals Retains Digbee Esg Rating Of A

Cornish Metals plc (AIM: TIN) (“Cornish Metals” or the “Company”), a mineral exploration and development company focused on advancing its wholly owned and permitted South Crofty tin project (“South Crofty”) in Cornwall, United Kingdom, is pleased to announce that it has retained an overall A rating from Digbee ESG (“Digbee”) in its second annual independent sustainability assessment.

Digbee is a mining-specific ESG disclosure framework. Each submission is scored by a team of accredited ESG experts against standardised criteria, on a scale from AAA to D. Cornish Metals achieved an A rating at both corporate level (range B to AAA) and for the South Crofty project (range CCC to AAA), giving an overall score of A with a range of CCC to AAA. The range shows how the score could move depending on how identified risks are managed. This year’s assessment was carried out against Digbee’s development-stage frameworks and is valid for 12 months from 11 August 2026.

To read the full report, please visit: https://cornishmetals.com/sustainability/digbee/

Extracts from the Report:

Sustainability governance has become more structured, supported by Board oversight, ESG KPIs within senior management and executive incentives, dedicated ESG budgets, a revised double materiality assessment and publication of the Company’s second Sustainability Report.

The Mine Water Treatment Plant treated approximately 3.6 million cubic metres of mine water during 2025, with reported discharges complying with permit limits. Renewable sources accounted for 96% of total energy consumption in 2025, with on-site hydropower supplying the treatment plant.

South Crofty is delivering tangible regional benefits. In 2025, 84% of employees were recruited from Cornwall and the Company spent £24.4 million with 516 suppliers, including 212 Cornish businesses.

The underground mine design, reuse of existing infrastructure on predominantly brownfield land and planned paste backfill of tailings limit new land disturbance and remove the need for a permanent surface tailings facility.

Digbee also identified areas where further work is needed as South Crofty moves into a more complex phase of development. These include independent assurance of sustainability data, the maturity of risk management systems and evidence of how controls perform in practice, and greater visibility of how closure and long-term water management obligations are provided for. The Company is reviewing these findings as part of its Sustainability Strategy.

Don Turvey, CEO of Cornish Metals, commented: “Retaining an A rating in our second Digbee assessment is a useful independent check on the progress we have made over the past year. It comes as South Crofty moves from planning towards construction, and the level of scrutiny rightly increases as activity on site grows. I am encouraged that Digbee has recognised the strengthening of our governance and the benefits already reaching Cornwall through local employment and spending with Cornish businesses.

“Digbee has also been clear about where we need to do more, including independent assurance of our data and the maturity of our risk management systems. Investors, regulators and the communities around South Crofty expect to see evidence, not only intent, and this process gives us a consistent way of measuring ourselves and improving year on year.”

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