Oman Antimony Roaster Update

4 November 2016

Tri-Star Resources plc

("Tri-Star" or the "Company")

Oman Antimony Roaster Update

Tri-Star Resources plc (AIM: TSTR), the independent mining and mineral processing company, is pleased to provide the following update with regard to the construction of the Oman Antimony Roaster ("OAR") being undertaken by the Company's Omani joint venture company, Strategic & Precious Metals Processing LLC ("SPMP"). Tri-Star has a 40% equity interest in SPMP.

Since the appointment of Worley Parsons, as EPCM contractor in February 2016, engineering design, procurement of long lead time items and plant layout have been progressing well.

The OAR plant design has been enhanced, both by the inclusion of a gold recovery stream and also by increasing capacity and associated design changes intended to create the ability to treat a wider range of different feedstocks. Maximum potential throughput has been increased from 36,000 tonnes per annum to 50,000 tonnes per annum.

A more streamlined plant layout is also expected to lead to a reduction in the site area from the initial planned 22 hectares, to 15 hectares. Site preparations have been completed and SPMP took formal control of the site on 24 October 2016. Civil engineering work is expected to commence in earnest by the end of the year.

The Company is also pleased to report that the manufacture of key plant components is underway and major capital items are expected to arrive on site during the first half of 2017.

Finally, negotiations with potential suppliers of concentrate are underway and test-work on sample materials is shortly to be conducted. As previously advised, a contractual trading arrangement with a major commodity trader is under negotiation.

Tri-Star intends to issue operational updates on the OAR more regularly now that ground-works have commenced.

Enquiries:

Tri-Star Resources plc Tel: +44 (0) 20 3470 0470

Guy Eastaugh, Chief Executive Officer

SP Angel Corporate Finance (Nomad and Broker) Tel: +44 (0) 20 3470 0470

Robert Wooldridge / Jeff Keating

Yellow Jersey PR Limited (Media Relations) Tel: +44 (0) 7825 916 715

Dominic Barretto / Alistair de Kare-Silver