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TMG Appointed to Support Execution at South Crofty Tin Project

Cornish Metals Selects Specialist Project Management Firm to Power Construction and Ramp-Up of Historic UK Mine

Toronto, Canada June 4, 2025 – Technical Management Group Ltd. (TMG), a global leader in project management consulting for the mining, energy, and infrastructure sectors, is proud to announce its engagement by Cornish Metals Inc. (AIM/TSX-V: CUSN) to support the construction and production ramp-up of the South Crofty Tin Project in Cornwall, United Kingdom.

Cornish Metals, which wholly owns and holds permits for the historic South Crofty project, has retained TMG to provide comprehensive project management consulting services as the project advances through the critical construction phase and prepares for full production. TMG will augment Cornish Metals’ Owner’s Team by embedding experienced professionals across project management, controls, procurement, and engineering to ensure seamless execution.

The integrated team will be led by newly appointed Project Director Guillermo Alcazar, who brings extensive experience in delivering complex mining developments and will oversee all construction and development activities moving forward.

“We’re proud to support Cornish Metals in a technically complex and symbolically important project,” said TMG President Kenny MacEwen. “South Crofty represents more than just a return to production—it’s a statement of what’s possible when the right team is assembled with clarity of purpose. TMG brings structure, discipline, and momentum to the project alongside Cornish Metals. Our mandate is clear: support a successful build and help position South Crofty as a modern mining operation ready to thrive.”

Don Turvey, CEO and Director of Cornish Metals, commented: “The engagement of TMG immediately bolsters our project development owner’s team through the addition of experienced professionals who will work alongside the existing Cornish Metals team, ensuring that we are project ready and setup for project success to bring South Crofty back to production.”

Backed by a global track record of delivering high-value capital projects, TMG is known for integrating seamlessly into Owner’s Teams and providing scalable, execution-focused solutions from early study development through commissioning and operational readiness. In addition to execution support, TMG delivers services across due diligence, study management, procurement strategy, operational ramp-up, document control, and tailored Owner’s Team structuring.

For more information on TMG’s full suite of services and proven project delivery expertise, visit www.tmgcorporation.com

About TMG

TMG (Technical Management Group Ltd.) is a globally recognized provider of project management consulting services for the mining, energy, and infrastructure sectors. TMG works side-by-side with owners to manage, de-risk, and deliver capital projects through all stages of development—from early scoping and feasibility to full execution and close-out. Learn more at www.tmgcorporation.com.

About Cornish Metals

Cornish Metals Inc. (AIM/TSX-V: CUSN) is a mineral exploration and development company focused on advancing the past-producing South Crofty tin project in Cornwall, United Kingdom. The South Crofty project is permitted and represents one of the highest-grade undeveloped tin resources globally. Cornish Metals is committed to reviving the UK’s tin production and positioning Cornwall as a strategic player in the global critical minerals supply chain. Learn more at www.cornishmetals.com.

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