Notification of Major Interest in Shares

For filings with the FCA include the annex

For filings with issuer exclude the annex

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

Regal Petroleum plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

N/A

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

N/A

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

N/A

An event changing the breakdown of voting rights

Yes

Other (please specify):

N/A

3. Full name of person(s) subject to thenotification obligation: iii

KELDA LIMITED

4. Full name of shareholder(s)(if different from 3.):iv

--KYLESTONE LIMITED

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

16 May 2019

6. Date on which issuer notified:

17 May 2019

7. Threshold(s) that is/are crossed orreached: vi, vii

14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB0031775819

91,868,182

28.652%

45,934,091

0

14.326%

0%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

N/A

N/A

N/A

N/A

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

N/A

N/A

N/A

N/A

N/A

Nominal

Delta

N/A

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

45,934,091

14.326%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

· KELDA LIMITED (holder of 50% of shares of KYLESTONE LIMITED)

· TOMKINS TRADING LIMITED (holder of 50% of shares of KYLESTONE LIMITED)

· --KYLESTONE LIMITED

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will ceaseto hold:

12. Date on which proxy holder will cease to holdvoting rights:

13. Additional information:

14. Contact name:

Natalia Burnosova

15. Contact telephone number:

+380444985373

+380675658055