Richmond Hill Regulatory News (RHR)

27 May 2026

Richmond Hill Resources Plc

(" Richmond Hill " or the " Company ")

Martello update

Richmond Hill Resources announces that further to its announcement of 14 April 2026 all the cores from the drilling programme at the Martello Gold Project have now been submitted for assaying with results expected to be received within the next three weeks. In aggregate 1,307 metres of drilling was completed across seven holes.

This announcement contains inside information for the purposes of the UK Market Abuse Regulation and the Directors of the Company are responsible for the release of this announcement.

Further information on the Company can be found on its website at www.richmondhillresources.com

Caution regarding forward looking statements

Certain statements in this announcement, are, or may be deemed to be, forward looking statements. Forward looking statements are identified by their use of terms and phrases such as ''believe'', ''could'', "should" ''envisage'', ''estimate'', ''intend'', ''may'', ''plan'', ''potentially'', "expect", ''will'' or the negative of those, variations or comparable expressions, including references to assumptions. These forward looking statements are not based on historical facts but rather on the Directors' current expectations and assumptions regarding the Company's future growth, results of operations, performance, future capital and other expenditures (including the amount, nature and sources of funding thereof), competitive advantages, business prospects and opportunities. Such forward looking statements reflect the Directors' current beliefs and assumptions and are based on information currently available to the Directors.