www. tri-starresources.com

September 2018

2

These presentation slides (the “Slides”) have been issued by Tri-Star Resources plc (the “Company”) in relation to an update on activities by theCompany. These Slides do not comprise an admission document or a prospectus relating to the Company, do not constitute an offer or invitation topurchase or subscribe for any securities of the Company and should not be relied on in connection with a decision to purchase or subscribe for any suchsecurities. The Slides and the accompanying verbal presentation do not constitute a recommendation regarding any decision to sell or purchasesecurities in the Company.

The Slides and the accompanying verbal presentation are confidential and the Slides are being supplied to you solely for your information and may notbe reproduced or distributed to any other person or published, in whole or in part, for any purpose. No reliance may be placed for any purposewhatsoever on the information contained in the Slides and the accompanying verbal presentation or the completeness or accuracy of such information.No representation or warranty, express or implied, is given by or on behalf of the Company, directors, officers, employees, agents or advisors or anyother person as to the accuracy or completeness of the information or opinions contained in the Slides and the accompanying verbal presentation, andno liability is accepted by such persons for any such information or opinions or otherwise arising in connection therewith (including in the case ofnegligence, but excluding any liability for fraud).

The Slides contain certain statements and expressions of belief, expectation or opinion which are forward-looking statements, and which relate, interalia, to the Company’s proposed strategy, plans and objectives or to the expectations or intentions of the Company’s directors. Such forward-lookingstatements involve known and unknown risks, uncertainties and other important factors beyond the control of the Company that could cause the actualperformance or achievements of the Company to be materially different from such forward-looking statements. Accordingly, you should not rely on anyforward-looking statements and the Company does not accept any obligation to disseminate any updates or revisions to such forward-lookingstatements. Any statement as to the past activities of the Company’s directors should not be relied upon as being an indication of their futureperformance.

The Slides have not been approved by an authorized person for the purposes of section 21 of the Financial Services and Markets Act 2000 (“FSMA”).They are exempt from the general restriction on the communication of invitations or inducements to engage in investment activity set out in section 21of FSMA on the grounds that they are directed only at those persons who have professional experience in matters relating to investments and who are:(i) a person of a kind described in Article 19(5) (Investment Professionals), Article 48 (certified high net worth individuals) or Article 49(2) (high networth companies etc.) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the "Order"); or (ii) a “qualified investor” asdefined in section 86(7) of FSMA (all such persons together being referred to as “Relevant Persons”).

Any investment, investment activity or controlled activity to which the Slides relate is available only to Relevant Persons and will be engaged in onlywith Relevant Persons. Persons of any other description, including those that do not have professional experience in matters relating to investments,should not rely or act upon the Slides. Reliance on the communication set out in these Slides for the purpose of engaging in any investment activity mayexpose an individual to a significant risk of losing all of the property invested or of incurring additional liability. Any individual who is in any doubt aboutthe investment to which these Slides relate should consult a person authorized by the Financial Conduct Authority specializing in advising oninvestments of the kind referred to in these Slides.

Disclaimer

3

Overview of Tri-Star

Tri-Star Resources plc (“Tri-Star”) is a mineral processing company, quoted on the AIM market of the London Stock Exchange plc (Ticker:

TSTR.L), engaged primarily in the downstream value added processing of antimony.

Tri-Star is a partner in the SPMP Project (or “Project”), an antimony and gold roaster. The Project is based in Sohar, Oman and is being

developed by Strategic & Precious Metals Processing LLC (“SPMP”), an Omani company in which Tri-Star has a 40% interest.

Tri-Star has invested a total of $28.8 million in the form of mezzanine loans and in equity.

SPMP Management is currently negotiating Working Capital and Letters of Credit facilities from finance institutions.

The Project has moved into the hot commissioning phase and is expected to produce first antimony metal due at the end of October 2018

and first gold in November 2018.

Tri-Star also has antimony exploration and mining licenses in Turkey and in Canada (New Brunswick).

Market cap (as of 24 Sep 2018): £39.99m

Tri-Star Antimony Canada Inc.

Uc Yildiz Antimon Madencilik

Turkey

Strategic & Precious Metals Processing LLC(registered in Oman)

99%100% 40%40%

20%

4

Tri-Star Board of Directors

Mark Wellesley-WoodChairman

Mark has over 40 years’ experience in both the mining industry and investment banking. Hewas a former director of Investec Investment Banking and Securities in London and formerChairman and CEO of DRDGold Limited.

Karen O’MahonyActing CEO & CFO

Karen initially joined Tri-Star as a Non-executive Director, following which she became actingCEO/CFO with a focus of assisting SPMP with funding and ramp up to production. Previously,Karen was the Deputy Chief Investment Officer at Misland Capital Ltd, a Director at DavyStockbrokers and an Associate at Goldman Sachs. Karen is also Managing Director of PEALInvestments Ltd as well as a Non-Executive Director for SPMP and Chronos Therapeutics Ltd.

Adrian CollinsSenior Independent

Director

Adrian has worked in the fund management business for over 40 years, a large part of whichwas at Gartmore Investment Management where latterly he was Managing Director. He iscurrently Chairman of Liontrust Asset Management and CIP Merchant Capital Ltd, BahamasPetroleum plc. Adrian was previously Chairman of Tri-Star, and is currently Chairman of theRemuneration Committee.

David FletcherNon-Executive Director

David is a Partner and Non-Executive Chairman of Odey Asset Management (“Odey AM”). Hehas been part of the management team at Odey AM for over 20 years since joining as ChiefExecutive in 1995. David is also a Senior Adviser at Social Finance, a not for profit social sectorinnovator. Previously, CEO at Leopold Joseph. David is currently Chairman of the TSTR AuditCommittee. David is also Non-executive Director for SPMP.

5

Tri-Star current objective

Strategy

Cost reduction - The Board’s focus is to implement a cost cutting strategy at the Tri-Star level, which involves maintaining a low

cost base at the UK plc, Turkish subsidiary and Canadian subsidiary levels.

Active management - On SPMP, the company’s strategy is centred in the active management and support of its key investment in

the SPMP Project. The Company continues to hold a significant stake in SPMP and remains actively involved with the

development of the Project through its representation on the Board of SPMP.

Partnerships & acquisitions - As the SPMP Project moves into full operation, it is the longer term strategy of the Company to

explore financing options and upstream partnerships or acquisitions to complement the SPMP Project and generate enhanced

value for its shareholders.

Company objective

The company’s objective is

simple:

To promote and achieve

medium and long term value

for its shareholders.

Source: SPMP Management, June 2018

6

About Antimony

Supply

The world antimony production and reserves (Tons of antimony content) for the last five years is indicated in the table below:

80% of the world’s antimony is produced by China. Due to environmentalcrackdowns, Chinese production is dropping and consumers are looking for anenvironmentally compliant supplier. SPMP offers clean & ethical production andaims to account for 15-20%1 of the antimony world production.

Price

Global demand is rising, driven by product innovations and safety regulations.

1 Source: SPMP analysis2 Source: Bloomberg

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20

08

20

09

20

10

20

11

20

12

20

14

20

15

20

16

20

17

20

19

USD

/to

nn

e

Historical antimony price2

7

Antimony: Supply Dynamics

Sb 51121.76

Antimony

Antimony Ingot About Antimony

A vital material in flame retardants and as an alloy inbatteries

Top 3 metal in most commodity supply risk lists

Naturally occurring in the earth’s crust but issignificantly scarce compared to its peers

Recent research indicates that an emerging new use forantimony is as a nanocomposite (consisting of Sb2O3,and Fe3O4) for use as new anode materials for lithium-ion batteries.1

Antimony Trioxide

Valu

e Ad

ded

1 Source: Loi Nguyen, Tuan & Soo Kim, Doo & Hur, Jaehyun & Sang Park, Min & Yoon, Sukeun & Tae Kim, Il. (2018). Iron-antimony-based hybrid oxides as high-performance anodes for lithium-ion

storage. Journal of Power Sources.2 Source: US Geological Survey, 2014

50%

35%

7%

8%

Flame retardants Lead acid batteries Stabillisers and plastics Other

Primary uses of antimony2

Outputs

The SPMP Project will

produce Antimony

Ingots and Antimony

Trioxide with Gold

doré and Gypsum as

byproducts.

Byproducts – Gold doré & Gypsum

8

About the SPMP Project

The Project has the capacity to process at least 50,000 dry tonnes per annum of antimony concentrate, producing circa 20,000 tonnes of antimony

and at least 50,000 ounces of gold.

The SPMP Project will produce high grade antimony ingots, powdered antimony trioxides, gold doré and gypsum.

Environmentally sound procedures have been put in place that can handle arsenic and sulphur in the right way.

The plant is designed with a gas circuit which means environmental credentials are deliverable.

A unique feature of the Project’s processing technology is the ability to recover gold from refractory ores, allowing the plant to process mixed

antimony/ gold feedstocks and potentially, refractory gold dorés.

Feedstock will be sourced internationally and will be subjected to a roasting, gas treatment and smelting process.

Source: SPMP Management, July 2018

9

Management

SPMP Team

Steven Din

CEO

SPMP has appointed Mr. Steven Din as CEO, with effect from 1 August 2018. Steven was previously Chief Executive Officer of Konkola Copper Minesplc (79% Vedanta Resources plc) which operates the flagship Konkola underground mine and associated processing facilities in the ZambianCopperbelt, including one of the largest copper smelters in the world today. He has worked in senior leadership positions at mining and metallurgicalfacilities across Europe and Africa, primarily with Rio Tinto plc. Steven comes with an excellent track record in leading and developing businesses andbrings with him a wealth of industry experience. His appointment is a key milestone to the successful short-term execution at SPMP and therealisation of longer term opportunities in the Antimony market.

Amer Al Jabri

CFO

SPMP has appointed Mr. Amer Al Jabri as CFO, with effect from 12 August 2018. Amer began his career working for Oman LNG as a business analyst.He then spent 5 years working for Abu Dhabi Gas Liquefaction Company (ADGAS). In 2006, he joined Oman Trading International (OTI), an Oman OilCompany, headquartered in Dubai (DIFC) and helped set up as a commodity trader specializing trading Crude Oil, Petrochemicals & Chemicals. Duringhis time at OTI, he was involved in Corporate Finance, Treasury and hedging. In 2012, he returned to Oman and Amer accepted the position of GM –Finance and Company Secretary with Oman Gas. Amer will be joining SPMP as CFO and will focus on establishing working capital lines and refinancingthe project post commissioning.

Brian Spratley

General Technical

Manager

Brian joined Tri-StarResources in 2010 whichpartnered to create SPMP in2014. Previous to this, Brianworked at Techpro, CrewGold and Anglo Americangaining 44 years experienceas a mining engineer.

Duan Anderson

General Production

Manager

Duan is a qualified ChemicalEngineer and Metallurgist.He worked his way up to asenior managerial role withAnglo American, where hewas responsible for anoperation producing morethan 2.6m Pt. oz. pa.

Salik Kawaja

General Commercial

and Contracts Manager

Mechanical Engineering andAPMP background. Salik waspreviously Head ofCommercial Projects withBP and AB foods. Salik hasmany years of experience asa Project CommercialManager.

Ian Hendry

Worley Parsons Project

Manager for SPMP

Ian began working forWorley Parsons RSA in 2009,responsible for all mineralprocessing engineers. Hehas been a Project Managerfor SPMP since Jan 2017.Previously he worked forVhumbanani and AngloPlatinum.

Bojan Kuzmanic

Feedstock & Sales

Worked for Trafigura Groupfrom 2011 to 2015, his finalposition was as Co-Head ofZinc Concentrates Bookbased in Switzerland. Priorto Trafigura, he worked forPechiney World Trade andEuromin SA. Metals

Executive team

10

SPMP Investment Highlights

Location The plant is strategically situated close to the Port of Sohar for ease of receiving materials and delivering product

Access to low-cost energy and exceptional infrastructure

Strategic Advantages

Oman tax exemptions because the company is based in the Sohar Free Zone corporate tax holiday

Core IP technology used in clean processing of antimony

Exceptional People Strong management team with significant experience in the metals market

The SPMP Board of Directors have a wide range of expertise which has helped manage the project from inception through to near completion

Scale

The first antimony roaster outside of China in 30 years, and the world's first clean plant, designed to EU environmental standards

At full capacity it will represent 15-20% of average annual world antimony production

Demand for Product

Antimony consistently ranks high in EU and US risk lists for supply of chemical elements required to maintain the current economy & lifestyle

Global demand is rising, driven by product innovations and safety regulations

11

SPMP Operational Highlights

SPMP Construction Milestones

The Project is currently under construction and c. 99% complete as of last RNS update in September 2018

The Plant is currently being commissioned

Offtake agreements for all products are currently being agreed with buyers globally

Appointment of a New SPMP CEO

Mr. Steven Din has been appointed as Chief Executive Officer, with effect from 1st August 2018

He was the Chief Executive Officer of Konkola Copper Mines plc which operates the flagship Konkola underground mine and associated processing facilities in the Zambian Copperbelt

Commissioning

Site health and safety

June 2018: The first batches of concentrate arrived on site

July 2018: Hot commissioning commences and production of CATO, IATO, Gypsum expected

First antimony and gold metal ingots due in Q4 2018

The site has achieved a total of 2.48m man hours without any injuries

Employees are currently being put through HSE training, with 68 employees having completed the training

12

•Diverse supplies of concentrate secured from regions around the world

•Significant international demand for the end products produced by the plant given its EU approved environmental standards

Contracting

•Full production 20 kt p.a. of antimony and 50,000 oz p.a. of gold reached by 2019

•On the cusp of production: Plant construction is now 98% complete

•Hot commissioning commenced In July 2018 and is to be followed by the production of antimony and gold ingot from October 2018

Progress & Production

•Potential for substantial phase two:

•Increase of upstream and downstream involvement

•Capacity increase

•Parallel projects from same technology base

Future prospects

Summary

Tri-Star’s main activity is through it’s Joint Venture (40% stakeholding) in the SPMP Project. The Project is attractive for the following

reasons:

•Powerful proprietary technology for processing a wide range of antimony and gold ores

•Environmentally sound procedures that can handle arsenic, and mercury in the right way

•Unique industry positioning: Ability to process gold ores as well as antimony

Technology

•Top management hires of Steven Din as CEO and Amer Al-Jabri as CFO

•Steven Din is an experienced CEO with a background in Vedanta Resources plc and Rio Tinto plc

•Amer Al-Jabri has in depth corporate finance experience in Oman with a background in Oman Gas and OTI

Team

•The first new antimony roaster outside of China in 30 years

•Designed to EU environmental standards – the world’s first clean plant

•At full capacity represents 15-20% of average annual world antimony production

Global significance

13

Appendix

14

Turkey

Tri-Star currently owns 90% of the exploration and mining rights for a historical artisanal mine in a known antimony belt in

the Murat Dagi mountains of western Turkey (“Göynük Project”).

The property comprises of a permitted mining area of 47 hectares within an exploration area of 783 hectares. The licence is

currently being maintained with no active exploration or mining being carried out.

Canada

The Company currently owns 100% of Tri-Star Antimony Canada. Through this Canadian subsidiary, the Company owns a

license to explore the land of a large undeveloped antimony project in Canada (“Bald Hill deposit”). The Bald Hill deposit

presents a synergistic opportunity for Tri-Star as there exists the potential to develop the deposit and for Bald Hill to

become a potential future supplier of feedstock for SPMP Project.

Turkey & CanadaThe Göynük deposit Stibnite rosette from the Göynük mine The Bald Hill site

Source: Tri-Star Management

15

SPMP Timeline

SPMP established

• Independent technical study was conducted by Senet & Mc Connell Dowell to demonstrate the concept, viability and preliminary economics

• OIF appointed Hatch to conduct Technical and Commercial DD

• A JV company (SPMP) was established to advance the project in conjunction with OIF and Dubai Natural Resources (“DutCo”)

2014

Scoping Lorem Ipsum

• The start of a scoping study conducted by GBM consultants on behalf of Tri-Star

• Investigated the process, design and costs of setting up a plant that designed to modern environmental standard in the gulf region

• FEED Studies were conducted bySPMP during the period at theMintek’s facilities in South Africaand preliminary design work withselected technology partners

• The project achieved permittingand funding and the key IP andsome executives were transferredfrom Tri-Star to SPMP

2013

2015

Design

16

SPMP Timeline

Project construction

2017

Addition of gold

Lorem IpsumThe decision was taken to progress the gold recovery potential for the project. The SPMP board adopted the revised scope changes in the roasting process to include gold recovery2

016

2018

Commissioning

Construction commenced in

April 2017

Appointment of Worley Parsons as EPCM

Aerial view of the site under construction in November 2017

Electricity switched on in May 2018

Aerial view in June 2018 – Cold commissioning has commenced

Hot commissioning has commenced in July 2018 with first products due in

Q4 2018

The roaster technology was proven through a pilot plant in February 2017. Conducted by SPMP at the laboratories of Simulus in Perth and CSIRO in Melbourne. The results were adjudicated by Worley Parsons and Wardell Armstrong

17

The SPMP Project - Current

Source: SPMP Management, June 2018

18

Contact Us

Karen O’Mahony

Acting Chief Executive Officer & Chief Financial Officer

18 Upper Brook Street

London W1K 7PU

Email: ir@tri-starresources.com

Phone: + 44 (0)20 7653 6291

Website: www.tri-starresources.com