Resignation of Chief Executive Officer

05 Oct Resignation of Chief Executive Officer

5^th October 2023

This announcement contains inside information

Anglesey Mining plc (“Anglesey” or “the Company”)

Resignation of Chief Executive Officer

Anglesey Mining plc (AIM: AYM), the UK minerals development company, announces that Jonathan (Jo) Battershill has informed the Board of his resignation as Chief Executive Officer of the Company in order to take up a position as Managing Director of Silver Mines Limited, an ASX-listed, silver development company, in Australia, in which he is currently a Non-Executive Director, effective 1^st January 2024.

A process to appoint a successor will commence immediately. Jo has agreed to remain in his role as CEO until 31 December 2023 to manage the current work programs and to assist with the smooth transition to a new CEO. Jo will also continue on the Board of the Company as a Non-Executive Director thereafter.

Current and pending work programs in the Company include:

• Northern Copper Zone infill drilling at Parys Mountain, with the drilling rig scheduled to arrive on site the week of 16^th October;

• Metallurgical test work for the White Rock and Engine Zones, which includes a trade-off study between the Dense Media Separation and X-Ray Transmission preconcentration processes;

• Ongoing studies for the Environmental and Social Impact Assessment for the Parys Mountain project; and

• Gap analysis for the environmental baseline studies at the Grängesberg iron ore project in Sweden.

John F Kearney, Chairman of Anglesey Mining, commented: “On behalf of the Board of Directors, I thank Jo for his efforts on Parys Mountain and Grängesberg since joining Anglesey in 2021, which have seen both projects advance significantly, and we wish him well in his new role with Silver Mines. “

“We are pleased that Jo has agreed to continue as a Non-Executive Director of Anglesey, and we look forward to his ongoing contributions to the Company in the future.”

“We expect to commence a search for a new CEO imminently and appreciate Jo’s commitment to advancing the projects while ensuring a smooth transition to a new CEO over the coming months.”

About Anglesey Mining plc

Anglesey Mining is traded on the AIM market of the London Stock Exchange and currently has 420,093,017 ordinary shares on issue.

Anglesey is developing its 100% owned Parys Mountain Cu-Zn-Pb-Ag-Au deposit in North Wales, UK with a reported resource of 5.3 million tonnes at over 4.0% combined base metals in the Measured and Indicated categories and 10.8 million tonnes at over 2.5% combined base metals in the Inferred category.

Anglesey also holds an almost 50% interest in the Grängesberg Iron project in Sweden, together with management rights and a right of first refusal to increase its interest to 100%. Anglesey also holds 12% of Labrador Iron Mines Holdings Limited, which through its 52% owned subsidiaries, is engaged in the exploration and development of direct shipping iron ore deposits in Labrador and Quebec.

The person responsible for arranging for the release of this announcement on behalf of Anglesey is John Kearney, Chairman.

For further information, please contact:

Anglesey Mining plc

Jo Battershill, Chief Executive – Tel: +44 (0)7540 366000

John Kearney, Chairman – Tel: +1 416 362 6686

Danesh Varma, Chief Financial Officer – Tel + 44 (0) 77409 32766

Davy

Nominated Adviser & Joint Corporate Broker

Brian Garrahy / Daragh O’Reilly – Tel: +353 1 679 6363

WH Ireland

Joint Corporate Broker

Katy Mitchell / Harry Ansell – Tel: +44 (0) 207 220 1666

LEI: 213800X8BO8EK2B4HQ71