14 September 2021

Tertiary Minerals plc ("Tertiary" or the "Company")

Appointment of Managing Director

Tertiary Minerals plc is pleased to announce the appointment of Mr. Patrick Cullen as Managing Director of the Company with immediate effect.

Mr. Cullen is an experienced mineral exploration executive with a strong technical background in geology, geophysics and mining and a proven track record leading multi-disciplinary teams across Southern Africa and Europe.

Commenting today, Executive Chairman Patrick Cheetham said:

"I am delighted that Patrick has agreed to join us. He does so at an interesting time in the development of our exploration projects in the USA and his experience in Zambia will be a valuable asset as we seek to progress our recent initiatives there. The Board and I look forward to working with him on the future success of the Company."

Most recently, Mr. Cullen was Chief Executive Officer at AIM listed Arkle Resources PLC, exploring for gold and base metals in Ireland. Prior to that, he was Technical Director at Kodal Norway (UK) Limited and he has also held senior positions at Montero Mining & Exploration Ltd and African Energy Resources Ltd, exploring for phosphate and uranium in Africa.  Prior to this, he held technical roles with AngloGold Ashanti and Schlumberger.

He holds a degree in Geology from the University of Portsmouth and an MBA from the University of Southern Queensland.

The following information is disclosed pursuant to Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies in relation to Patrick Brendan Cullen, aged 50:

There are no further disclosures required under Schedule 2(g) of the AIM Rules for Companies.

Mr. Cullen's appointment is for an initial 12 months' term with a view to the appointment being renewed on an open-ended basis thereafter. Mr. Cullen does not hold any shares in the Company.

 For more information please contact:

Market Abuse Regulation (MAR) Disclosure

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 which forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 ("MAR"). Upon the publication of this announcement via Regulatory Information Service ("RIS"), this inside information is now considered to be in the public domain.

Note to Editors

Tertiary Minerals plc (ticker symbol 'TYM') is an AIM-traded mineral exploration and development company building a multi-commodity project portfolio in Nevada (USA), Zambia and Europe.