Notice of General Meeting

10 October 2025

Union Jack Oil plc

("Union Jack" or the "Company")

Notice of General Meeting

Proposed Issue of 40,000,000 Fundraise Warrants and up to 36,641,474 Bonus Warrants to Subscribe in Aggregate for up to 76,641,474 Ordinary Shares

Union Jack Oil plc (AIM: UJO), a UK and USA focused onshore hydrocarbon production, development and exploration company, announces that following the withdrawal of the resolution that was to be put to shareholders at a general meeting on 26 August 2025, the Company has today posted a Circular and notice of general meeting to shareholders.

The General Meeting ("GM") will be held on 30 October 2025 at 11.00 a.m. at the George White Suite, The Bristol Hotel, Prince Street, Bristol, BS1 4QF.

Following shareholder feedback regarding the proposed issue of warrants by the Company as part of the Fundraise announced on 23 July 2025, the Board has concluded that it would be in the Company's best interests to offer all shareholders an opportunity to participate in the Company's future success through an issue of bonus warrants to all shareholders, on the basis of one bonus warrant in respect of every four ordinary shares of 5p each in the capital of the Company ("Ordinary Shares") held by shareholders at 6.00 p.m. on 3 November 2025 (the "Bonus Warrants"). The proposed issue of Bonus Warrants will be in addition to the issue of warrants to those shareholders who participated in the Fundraise ("Fundraise Warrants").

At the General Meeting a resolution will be proposed to seek the approval of shareholders to authorise the Directors to issue the Bonus Warrants to subscribe for up to 36,641,474 Ordinary Shares and the Fundraise Warrants to subscribe for up to 40,000,000 Ordinary Shares and to empower the Directors to disapply pre-emption rights in relation to the allotment of Ordinary Shares in connection with the issue of both the Bonus and Fundraise Warrants pursuant to their exercise (the "Resolution").

Subject to the passing of the Resolution, the Fundraise Warrants and the Bonus Warrants will be subject to the same terms, namely each Fundraise Warrant and each Bonus Warrant will be exercisable at 8 pence for a period of two years following their issue (which is expected to be 7 November 2025) and will otherwise be subject to the terms and conditions set out in the Warrant Instrument.  The Bonus Warrants and the Fundraise Warrants will not be admitted to trading on AIM.

Expected Timetable of Principal Events

Each of the times and dates in the below is indicative only and may be subject to change by the Company, in which event details of the new times and dates will be notified to shareholders by announcement through a Regulatory Information Service.

References to times set out above and in the circular are to Greenwich Mean Time unless stated otherwise. The timetable above assumes that the Resolution is passed at the General Meeting without adjournment.

Further details on the background to and reasons for the General Meeting will be set out in the Circular which will also be made available on the Company's website (www.unionjackoil.com).

For further information, please contact: