BUILDING UPON EXPLORATION SUCCESS MARCH 2024

Important Notice

The information contained in this document (the "Presentation") has been prepared and distributed by Deltic Energy PLC (the "Company"). It has not been fully verified and is subject to material updating, completion, revision, verification and further amendment. This Presentation has not been approved by an authorised person in accordance with Section 21 of the Financial Services and Markets Act 2000, as amended ("FSMA"). The securities mentioned herein have not been and will not be, registered under the U.S. Securities Act of 1933, as amended (the "Securities Act"), or under any U.S. State securities laws, and may not be offered or sold in the United States unless they are registered under the Securities Act or pursuant to an exemption from or in a transaction not subject to the registration requirements of the Securities Act. This Presentation is for information purposes only and does not constitute, and the Company is not making, an offer of securities.

While the information contained herein has been prepared in good faith, neither the Company nor any of its shareholders, directors, officers, agents, employees or advisers give, have given or have authority to give, any representations or warranties (express or implied) as to, or in relation to, the accuracy, reliability or completeness of the information in this Presentation, or any revision thereof, or of any other written or oral information made or to be made available to any interested party or its advisers (all such information being referred to as "Information") and liability therefore is expressly disclaimed. Accordingly, neither the Company nor any of its shareholders, directors, officers, agents, employees or advisers take any responsibility for, or will accept any liability whether direct or indirect, express or implied, contractual, tortious, statutory or otherwise, in respect of, the accuracy or completeness of the Information or for any of the opinions contained herein or for any errors, omissions or misstatements or for any loss, howsoever arising, from the use of this Presentation.

Prospective investors must rely on their own examination of the legal, taxation, financial and other consequences of an investment in the Company, including the merits of investing and the risks involved. Prospective investors should not treat the contents of this Presentation as advice relating to legal, taxation or investment matters and are advised to consult their own professional advisers concerning any acquisition of shares in the Company. This Presentation should not be considered a recommendation by the Company or any of its affiliates in relation to any prospective acquisition of shares in the Company.

Certain of the information contained in this Presentation has been obtained from published sources prepared by other parties. Certain other information has been extracted from unpublished sources prepared by other parties which have been made available to the Company. The Company has not carried out an independent investigation to verify the accuracy and completeness of such third party information. No responsibility is accepted by the Company or any of its directors, officers, employees or agents for the accuracy or completeness of such information.

All statements of opinion and/or belief contained in this Presentation and all views expressed represent the directors' own current assessment and interpretation of information available to them as at the date of this Presentation. In addition, this Presentation contains certain "forward-looking statements", including but not limited to, the statements regarding the Company's overall objectives and strategic plans, timetables and capital expenditures. Forward-looking statements express, as at the date of this Presentation, the Company's plans, estimates, forecasts, projections, opinions, expectations or beliefs as to future events, results or performance. Forward-looking statements involve a number of risks and uncertainties, many of which are beyond the Company's control, and there can be no assurance that such statements will prove to be accurate. No representation is made or assurance given that such statements or views are correct or that the objectives of the Company will be achieved. The reader is cautioned not to place reliance on these statements or views and no responsibility is accepted by the Company or any of its directors, officers, employees or agents in respect thereof. The Company does not undertake to update any forward-looking statement or other information that is contained in this Presentation. Neither the Company nor any of its shareholders, directors, officers, agents, employees or advisers take any responsibility for, or will accept any liability whether direct or indirect, express or implied, contractual, tortious, statutory or otherwise, in respect of, the accuracy or completeness of the information contained in this Presentation or for any of the opinions contained herein or for any errors, omissions or misstatements or for any loss, howsoever arising, from the use of this Presentation.

This document may not be reproduced, copied, published, distributed or circulated, to any third party, in whole or in part, or published in whole or in part for any purpose, without the express prior consent of the Company.

2

Board & Management

Driven and highly competent management team with >100 years of UKCS Experience

Graham Swindells

Chief Executive Officer

Graham joined Deltic as Chief Financial Officer in 2013 and became Chief Executive in 2018. He previously worked in corporate finance and M&A, specialising in advising mid and small-cap public companies. Before joining Deltic, he was a Director in Corporate Finance at Ernst & Young. Previously, he was a Director in Corporate Finance at Arbuthnot Securities where he gained significant natural resources experience acting as nominated adviser and broker. He qualified as a Chartered Accountant in Scotland working for BDO and subsequently PwC.

Andrew Nunn

Chief Operating Officer

Andrew is a Chartered Geologist with over 20 years of experience working on exploration, mining and geo-environmental projects in Europe, Australasia and Africa. For the last 10 years he has worked on a wide variety of UK and European conventional and unconventional gas projects with a primary focus on Carboniferous aged reservoirs. Andrew's previous role was as Exploration Manager for Dart Energy. He holds a B.Sc. (Hons) in Economic Geology and an M.Sc. in Environmental Management. Andrew was a Director of the Oil and Gas Independents' Association (OGIA) from February 2020 until July 2024.

Sarah McLeod

Chief Financial Officer

Sarah joined Deltic as Chief Financial Officer in January 2020. Sarah has 20 years of experience in the international oil and gas industry. She previously held the position of Group Financial Controller at New Age. Sarah spent 10 years with ConocoPhillips in a variety of senior financial and strategic roles and also two years with Maersk Oil. She started her career with Deloitte, spending six years in its oil and gas team during which time she qualified as a Chartered Accountant.

Mark Lappin

Non-Executive Chairman

Mark has over 35 years of experience in the oil and gas industry. Mark's recent roles include Technical Director at Cuadrilla and prior to that Sub- Surface Director for UK and Netherlands at Centrica. Mark began his career as a Geophysicist at Phillips Petroleum and has held senior technical and commercial roles with Phillips, Exxon Mobil and Dart Energy. Mark's North Sea focussed operational, commercial and super-major E&P experience will be hugely valuable as the company moves into the next stage of its development. Mark is a Visiting Professor at University of Strathclyde Centre for Energy Policy.

Peter Cowley

Non-Executive Director

Peter Cowley is a geologist with 50 years of international experience in the minerals industry and has been involved in the discovery and development of a number of gold mines in Africa. Peter was previously Managing Director of Ashanti Exploration Limited, Group Technical Director of Cluff Resources Plc, CEO of Banro Corporation and is currently President and a Director of Loncor Gold Inc. He holds M.Sc. and M.B.A. degrees and is a Fellow of Institute of Materials, Minerals and Mining.

Peter Nicol

Non-Executive Director

Peter has 40 years of experience in the energy sector. He was previously Head of Oil & Gas at GMP Securities Europe, Global Sector Director of Oil

  • Gas Research at ABN Amro & Head of European Oil & Gas Research at Goldman Sachs. Peter is a non-executive director of exploration focussed Touchstone Exploration Inc. & Eco (Atlantic) Oil & Gas Ltd, both of which are AIM quoted. He is also an independent director of ERC Equipoise Limited. Peter started his career with British National Oil Corporation & holds a Bachelor of Science in Mathematics & Economics

from Strathclyde University

3

Corporate Structure and Major Shareholders

AIM:DELT

CAPITAL STRUCTURE

Share Price1

32 p

Shares in Issue

93m

Options

11m

Free Float

80.8%

Cash2

£6.1m

Debt

NIL

Market Capitalisation1

£30m

  1. as at 10th March 2024
  2. as at 30 November 2023 (unaudited)

MAJOR SHAREHOLDERS3

%

IPGL (Michael Spencer)

18.8

Interactive Investor

10.6

Hargreaves Lansdown

10.3

Inthallo (Richard Sneller)

9.7

Canaccord

5.4

Janus Henderson

5.2

Holders of <3%

40.0

3 as at 29th February 2024

4

Delivering Our UK Exploration Strategy

High impact SNS Gas Exploration

Major discovery with first well at Pensacola in January 2023 Pensacola appraisal well scheduled for Q4 2024 Exploration well on Selene gas prospect planned for Q3 2024

Exploration Success is Route to Growth

Focus on value enhancement through the drill bit

Leverage significant equity to reduce future capital exposure Retain exposure to future production revenues

Use revenues to reduce cycle times on new opportunities

SYROS PROSPECT

24.5 mmbls (Gross P50 Prospective Resources)

100% Deltic

Farm-out Process Active

PENSACOLA DISCOVERY

326 mmboe (Gross P50 HIIP)

15-21.8mmboe (Net 2C Resources)

Shell UK Operated

Appraisal Well Q4 2024

Build Strong Partnerships

Teesside

Non-operated model requires quality operators like Shell

Allows Deltic to leverage the capabilities of major E&P companies Independent resource certification provides validation Technical partnerships keep overheads down

Easington

Securing the future of domestic gas production in the UK

Natural gas is a key part of the energy mix during the transition to Net Zero Domestic production is less carbon intensive and key for UK energy security UK production provides UK jobs and tax revenue

SELENE PROSPECT

318 BCF (Gross Prospective Resources)

Shell UK Operated

Exploration Well Q3 2024

Bacton

5

Core Asset Overview

Material Resource Base Focussed on Southern North Sea

PENSACOLA DISCOVERY

Net Contingent

Post-Tax

Licence P2252

Resources

2C NPV10

(mmboe)

Net to Deltic

Working

Operator

Formation

Development

1C

2C

3C

USD$M

Interest

Scenario

Zechstein

Gas Only

5.7

15

32

199

30%

Shell UK

Hauptdolomit

Combined

7.2

21.8

46.5

205

SELENE PROSPECT

Gross Prospective

GCoS

Licence P2437

Resources (BCF)

Working

Operator

Formation

HC Type

1C

2C

3C

%

Interest

25%1

Shell UK

Leman Sst

Gas

132

318

581

70

SYROS PROSPECT (CNS)

Gross Prospective

GCoS

Licence P2452

Resources (MMboe)

Working

Operator

Formation

HC Type

1C

2C

3C

%

Interest

100%

Deltic

Fulmar Sst

Oil

13.7

24.5

39.7

58

1 subject to completion of farm-out to Dana Petroleum

6

Commitment to ESG

Health & Safety. Environment. Net Social Benefit.

Governance

Governance aligned with QCA guidelines

Board supported H&S, Environment & ESG policies Climate related disclosures in Annual Report since 2021

Health and Safety

Health and safety of staff, public and other stakeholders is a

RN

E

A

V

N

O

G

CE

> STRONG INDEPENDENT DIRECTORS

  • FULLY SUPPORTIVE OF ESG GOALS
  • ESG ASSESSED AT STRATEGIC AND TRANSACTIONAL LEVELS

key business priority

Key RIDDOR stats published in Annual Report since 2021

Environment

Certified Carbon Neutral Business in 2024

UK natural gas focussed portfolio

UK gas consumption >> UK gas production

O

IR

V

N

E

N

T N E M

> GAS FOCUSSED STRATEGY

  • KEY TRANSITION FUEL
  • NET ZERO ALIGNMENT
  • LOCAL IS BETTER

UK produced gas has lower CO2 intensity than imported LNG

Focus on Net Social Benefit

Gas is part of the energy mix for the foreseeable future Also petrochemicals, domestic heating and hydrogen Maximise benefits and mitigate drawbacks of natural gas UK production = UK jobs, tax revenues & security of supply

> UK JOBS AND SKILLS

  • UK TAX REVENUES
  • SOCIAL BENEFIT vs IMPACT

7

LICENCE P2252 PENSACOLA DISCOVERY

APPRAISAL WELL PLANNED FOR Q4 2024

Pensacola Discovery (30% Deltic)

Competent Persons Report completed by RPS Energy (Jan 2024)

41/10-1

41/05a

Confirms significant oil and gas discovery with gross P50 HIIP of 326 MMboe

Maiden Contingent Resources estimates based on two potential development scenarios Positive commercial evaluation supports future development

Potential for Pensacola to become key hub in developing wider Zechstein play

41/05a-2

N-S Seismic Line Showing Facies and Hydrocarbon Type Distribution

Top Hauptdolomit Depth Structure mTVDSS Map

9

Pensacola Discovery

Gas Only Development Scenario

Independently (RPS) certified contingent resources assessment and valuation

2C Resources of 15 MMboe and post-tax NPV10 of USD$199M net to Deltic

3 well development with normally unmanned installation

Gas export via new pipeline to Teesside

CO2 removal onshore and re-injected

RPS Q4 2023 forward commodity price assumptions

CONTINGENT RESOURCES

Deltic Net Working

Hydrocarbon Type

Units

Interest1

1C

2C

3C

Gas

Bscf

34

89

190

Condensate

MMstb

0.1

0.2

0.4

Oil Equivalent

MMboe2

5.7

15.0

32.0

1Deltic holds a 30% working interest in P2252

2Conversion rate of 6,000 scf per boe

ECONOMIC EVALUATION

Gas Only

ELT1

Post-Tax NPV - Net to Deltic2

Case

Date

USD$ Million

Discount Rate

0%

10%

12%

15%

2C

2044

599

199

158

111

  1. Economic Limit Test
  2. Deltic holds a 30% working interest in P2252

10

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Disclaimer

Deltic Energy plc published this content on 13 March 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 13 March 2024 16:03:03 UTC.