9 June 2026

Rome Resources plc
("Rome Resources" or the "Company")

Update in relation to Canadian tin and critical metals exploration

Proposed 2026 field programme at New Brunswick Tin-Tungsten-Indium Project

Rome Resources plc (AIM: RMR), the DRC-focused tin and copper explorer, is pleased to provide an update on the proposed 2026 field programme at the New Brunswick tin-tungsten-indium project in Eastern Canada. 

As announced by the Company on 10 March 2026, the Company entered into an option agreement (the "Option") to acquire working interests in early-stage exploration licences across 109 km² of mining claims in the Canadian Province of New Brunswick, close to the Mount Pleasant deposit, hosting the Three Lakes and Schoullar Mountain Projects (the "Projects"). It was further noted in the announcement that during the Option's period Rome Resources shall act as the operator of the licences connected to the Projects (the "Licences") and be responsible, inter alia, for carrying out exploration on the Licences.

It is expected that the 2026 field programme will commence this week. As operator, Rome Resources expects to incur a maximum of CA$150k in costs in relation to the 2026 field programme, following which it will assess its position regarding the exercise of the Option.

Highlights

·    2026 field programme commencing across three priority target areas in New Brunswick

·    Over 500 samples planned from surface and trench sampling

·  Land package subject to the Option includes areas adjacent to the historic Mount Pleasant Tungsten Mine, a past-producing tungsten operation

·    Field programme targets tin, tungsten and indium mineralisation in a highly prospective North American critical minerals district

Project overview

The Late Devonian Granite play of southwestern New Brunswick is a tin-tungsten-molybdenum-indium system with pervasive greisenisation in the later stages of intrusion.  Substantial showings of the target minerals have been identified across the district.

While the district remains largely underexplored by modern standards, it includes the historic Mount Pleasant Tungsten Mine and numerous historical tin and tungsten workings. 

The Company's decision to explore in New Brunswick reflects both the prospectivity of the district and its position within a stable North American mining jurisdiction. The region hosts extensive granite-related mineralisation, including critical minerals such as tin, tungsten and indium, commodities which continue to attract increasing strategic attention globally.

2026 field programme

The 2026 programme of fieldwork will focus on assessing the potential for exploration drilling across several tin and tungsten showings in three key areas of the Devonian granite play of southwestern New Brunswick (Figure 1). 

The programme is expected to include over 500 samples which are likely to be taken for assays in a mixture of surface and trench sampling across the three main target areas.

Figure 1:  Project areas subject to the Option

Key target areas

1.   Schoullar Mountain

Located a few kilometres east of the historic Mount Pleasant Tungsten Mine and in the vicinity of an undeveloped tin zone, this target lies within the same broader mineralised system. The programme in this area will focus on sampling along four historical IP profiles, including trenching in two areas where the IP chargeability is interpreted to be close to surface. IP chargeability is a commonly used technique to detect sulphide and other metallic ore constituents.

2.   Square Lake

Situated on the eastern greisenised margin of the Mount Douglas granite, this area will be sampled in and around the vicinity of several groups of historical workings for tin and tungsten.

3.   Victoria Lake

(An expanded and re-named Three Lakes Project referred to in the Company's 10^th March 2026 announcement).

This area comprises a large area of claims along the youngest greisenised phase of the Mount Douglas granite, where multiple showings of tin and tungsten have been identified.  Grades of up to 1.4% tin have been identified in surface sampling. 

The proposed work programme will combine surface sampling in the greisen along with targeted trenching in areas with near-surface tin mineralisation.

Provincial Support

In line with New Brunswick's stated policy of supporting mineral exploration, as operator, Rome Resources has been awarded an exploration grant covering a portion of its 2026 Field Programme expenditures.

 The board of directors of Rome Resources (the "Board") are highly appreciative of this financial support, which underscores the Province's commitment to fostering mineral exploration.

Paul Barrett, Chief Executive Officer of Rome Resources, commented:

"The Mount Douglas granite system hosts one of the most prospective tin-tungsten-indium districts in eastern Canada, including the historic Mount Pleasant Tungsten Mine. The potential for tin, tungsten and indium resources in the Mount Douglas and associated granite systems potentially represents a significant opportunity for the Company and, with tungsten now firmly established as a strategically important critical mineral, we are delighted to be advancing the first field programme as operator across the project area.

The enthusiasm shown by the Province of New Brunswick for developing its resources demonstrates that we are pushing on an open door, and we look forward to potentially unlocking the potential of this highly prospective region, subject to the exercise of the Option.

The team continues to work towards an updated Mineral Resource Estimate for our Bisie North Project and will update the market on this along with the ongoing geophysical survey operations in due course."

For further information, please contact:

Subscribe to our news alert service: https://romeresources.com/auth/signup

Qualified Person Statement

Dr. Paul Armitage is a consultant of Rome Resources plc, a qualified geologist, a Fellow of the London Geological Society and a Member of the Institute of Materials, Minerals and Mining. Dr. Armitage is a qualified person (QP) under NI 43-101 and as defined by the AIM Note for Mining, Oil and Gas Companies for the purposes of this announcement and has reviewed and approved the scientific and technical information contained in this news release.