Union Jack Oil PlcLSE: UJO

Notice of Commencement of Work at West Newton

· Issued by Union Jack Oil Plc

9 September 2026

Union Jack Oil plc

("Union Jack" or the "Company")

Notice of Commencement of Work at West Newton

Union Jack Oil plc (AIM: UJO) notes the announcement released this morning by Reabold Resources plc regarding the commencement of work at West Newton, in which Union Jack has a 16.665% working interest, set out as follows: West Newton Update, Data Centre Feasibility Study - 07:00:07 09 Sep 2026 - RBD News article | London Stock Exchange

For further information, please contact:

Union Jack Oil plc

Craig Howie, Executive Chairman                                          info@unionjackoil.com

John Americanos, Executive Director

SP Angel Corporate Finance LLP                                          +44 (0)20 3470 0470

Nominated & Financial Adviser and Joint Broker

Matthew Johnson

Jen Clarke

Zeus Capital Limited                                                              +44 (0)20 3829 5000

Joint Broker

Antonio Bossi

Simon Johnson

George Duxberry