Inaugural Digbee Esg Rating Of A

Cornish Metals Inc. (AIM/TSX-V: CUSN) ("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 an independent panel of globally recognised sustainability experts from Digbee has awarded Cornish Metals an inaugural overall rating of A for both its corporate and project performance.

The Digbee platform offers companies a right-sized, future-looking set of globally-aligned sustainability frameworks. Digbee evaluates a comprehensive range of factors, considering both the asset's context and the effectiveness of management actions, to assign a rating from AAA to D. The A score achieved by Cornish Metals is an average of scores received between CCC to AAA.

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

Extracts from the Report:

• ESG priorities are embedded in the Company's strategic planning and governance structures, as evidenced by an internal double materiality assessment, development of a formal sustainability strategy, linkage of ESG KPIs to executive remuneration, publication of the inaugural Sustainability Report, commitments to preserving the mining cultural heritage and improving biodiversity.
• The Company has attracted significant investment from Vision Blue Resources and the UK National Wealth Fund (together holding over 55%), reflecting strong market and public-sector confidence in its responsible tin production model and long-term alignment with the UK Critical Minerals Strategy.
• The South Crofty Project incorporates underground mining, reuse of existing infrastructure, backfilling of tailings, use of renewable electricity, and commissioning of a high-efficiency Water Treatment Plant, demonstrating active efforts to reduce greenhouse gas emissions, surface disturbance and water pollution.

Don Turvey, CEO and Director of Cornish Metals, stated: "We are very pleased to share our inaugural sustainability rating from Digbee, which demonstrates the Company's commitment to operating to international best practices and acting with transparency. We enjoyed working with Digbee on this and appreciate the comprehensive overview that they have compiled. We understand there is always room for improvement, and we will be taking Digbee's points of feedback onboard as we continue to develop our environmental, social and governance practices."

Jamie Strauss, founder and CEO of Digbee, commented: "The successful completion of the Digbee sustainability assessment underscores Cornish Metals' belief that responsible mining is not only the right approach, but a critical differentiator. By embedding responsibility at the heart of its strategy, the company strengthens its social licence to operate and builds trust among all stakeholders - from communities, regulators and investors.

Earning an excellent 'A' rating through the Digbee assessment demonstrates the company's significant achievements to date in transparency, environmental stewardship, and community engagement. This independent verification not only validates Cornish Metals' current performance but also reflects its clear vision for continuous improvement - proving that mining can be both a driver of economic opportunity and a trusted partner in protecting and enhancing the communities and environments in which it operates."​

Figure 1: Graphic representation of Cornish Metals' overall sustainability risks and opportunities assessed by Digbee.

ON BEHALF OF THE BOARD OF DIRECTORS

"Don Turvey"

Don Turvey

CEO and Director

Engage with us directly at our investor hub. Sign up at: https://investors.cornishmetals.com/link/PKav7e

Caution regarding forward looking statements