Darwin Discovery, Falkland Islands

Investor Presentation

January 2023

1

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Darwin's Appraisal & Phased Development

Sea Lion

Scotia

PL 018, 019, 020: 40 Blocks (c.10,000 sq. km)

2,517 sq.km. 3D seismic

Darwin

Darwin discovery and near-field prospects

Stanley

Loligo

• Borders & Southern is a successful explorer - it has a 100% interest in a

large gas condensate discovery in the Falkland Islands

Humpback

Darwin Toroa

Stebbing

The discovery has excellent sub-surface definition

The Company has designed, and had validated, a new phased

development concept that requires relatively low capex and offers

accelerated payback

January 2023

3

Darwin - A Large, Liquids-rich, Gas Condensate Discovery

Estimated Wet Gas Initially In-place (Bscf)*

Low

Best

High

Darwin East

659

1,096

1,759

Darwin West

1,361

2,110

3,160

- it has a 100% interest in a large gas

Best Estimate Gross Contingent & Prospective Resource*

Condensate

Condensate

(MMSTB)

& LPG (MMBBL)

Darwin East

115

170

(Contingent (2C))

Darwin West

202

292

(Prospective)

* Independent un-risked assessment

Darwin comprises two adjacent tilted fault blocks, Darwin East and Darwin West

An independent un-risked best estimate of wet gas initially in-place for the combined area is 3.2 TCF and for gross Contingent and Prospective Resource 462 million barrels of liquids (condensate & LPGs)

Condensate is a mixture of light hydrocarbons,

Contingent Resource

Prospective Resource

similar to a very light (high API) crude oil, that

exist in the gaseous phase at the original

temperature and pressure conditions of the

Darwin East

reservoir, but when produced, condense out in

the liquid phase at surface temperature and

Darwin West

pressure conditions.

Discovery well 61/17-1

Darwin Condensate: 46-49o API

3 Km

CGR (from samples): 123-140 stb/MMscf

January 2023

4

Darwin - Exceptionally Imaged on 3D Seismic

A

B

"Seismic amplitude conformance to structure"

61/17-1

A

B

The exceptional imaging of the Darwin reservoir helps provide greater confidence in the resource estimates, enhances the siting of appraisal and

development wells and therefore the

efficient draining of the reservoir

January 2023

5

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Borders & Southern Petroleum plc published this content on 17 January 2023 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 17 January 2023 09:09:01 UTC.