Exhibit 23.3

Argus Media Group

May 6, 2026

Guardian Metal Resources PLC

Re: Consent of Argus Media Group

Dear Sirs,

We refer to the registration statement on Form F-1 (the “Registration Statement”) to be filed by Guardian Metal Resources PLC (the “Company”) with the United States Securities and Exchange Commission (the “SEC”) under the Securities Act of 1933, as amended, in connection with the resale of shares by certain shareholders from time to time (the “Resale”).

We hereby consent to the use of our name and the inclusion of information, data and statements from our industry report commissioned by the Company, entitled “Tungsten Market Outlook” dated November 17, 2025 (the “Report”), and any amendments or updates thereto, in the following: (i) the Registration Statement and any amendments, including under “Prospectus Summary,” “Industry,” and “Business”; (ii) written correspondence with the SEC; (iii) future SEC filings by the Company, including Forms 20-F, 6-K and other filings (collectively, the “SEC Filings”); (iv) the Company’s and its affiliates’ websites and publicity materials; (v) institutional and retail roadshows and related activities for the Resale; and (vi) other marketing materials in connection with the Resale.

We further consent to the filing of this letter as an exhibit to the Registration Statement, any amendments thereto, and any other SEC Filings for the purposes stated above.

For and on behalf of
Argus Media Group