Cornish Metals: Change of Registered Office

Change of Registered Office

23 July 2026

Cornish Metals plc (AIM: TIN) (“Cornish Metals” or the “Company”), announces that it has changed its registered office address to Falcon House, Charles Street, Truro, TR1 2PH.

ABOUT CORNISH METALS

Cornish Metals is a mineral exploration and development company that is advancing the South Crofty critical mineral project towards production. South Crofty:

is a historical underground tin mine located in Cornwall, United Kingdom and benefits from existing mine infrastructure including multiple shafts that can be used for future operations;is the highest grade known tin Mineral Resource not in production with significant near-mine and regional Mineral Resource potential;is permitted to commence underground mining (valid to 2071), construct a new processing facility and for all necessary site infrastructure;is expected to produce approximately 4,700 tonnes of tin-in-concentrate annually in the first five years of full production at lowest-quartile all-in sustaining costs over an initial 14-year mine life;will be a low environmental impact underground mine with zero surface tailings;would be potentially the first primary producer of tin in Europe or North America. Tin is a Critical Mineral as defined by the UK, American, and Canadian governments as it is used in almost all electronic devices and electrical infrastructure. Approximately two-thirds of the tin mined today comes from China, Myanmar and Indonesia;benefits from strong local community, regional and national government support with a growing team of skilled people, local to Cornwall, and could generate over 300 direct jobs;is an opportunity for a secure domestic supply of tin in the UK supporting a low carbon economy.

ENDS

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

For additional information please contact:

Cornish Metals	Fawzi HananoEmily Allhusen	[email protected][email protected]
		Tel: +44 1209 715 777
SP Angel Corporate Finance LLP(Nominated Adviser)	Charlie BouveratAdam CowlEwan Leggat	Tel: +44 203 470 0470
Berenberg(Joint Broker)	Jennifer LeeIvan Briechle	Tel: +44 20 3753 3040
Peel Hunt(Joint Broker)	Ross AllisterDavid McKeown	Tel: +44 20 7418 8900
BlytheRay(Financial PR)	Tim BlytheMegan RaySaid Izagaren	[email protected]Tel: +44 207 138 3204