16 April 2026

Union Jack Oil plc

("Union Jack" or the "Company")

Crossroads Well Southern Oklahoma USA Update

Union Jack Oil plc (AIM: UJO), a UK and USA focused onshore hydrocarbon, production, development, exploration and investment company, announces that, following the update on 8 April 2026, Reach Oil and Gas Company Inc. (the "Operator"), has informed the Company that there has been a short delay to the spud date for the Crossroads well, located in Southern Oklahoma, USA as a result of rig maintenance requirements. The Operator is confident that the well will be spudded before the end of April 2026.

Union Jack currently holds a 43% interest. The Company's share of the drilling costs have already been funded from the Company's existing cash resources.

For further information, please contact:

Union Jack Oil plc                                                                                          [email protected]

David Bramhill

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

Nominated Adviser and Joint Broker

Matthew Johnson

Richard Hail

Jen Clarke

Zeus Capital Limited                                                                              +44 (0)20 3829 5000

Joint Broker

Antonio Bossi

Simon Johnson

George Duxberry

Gneiss Energy Limited                                                                         + 44 (0)20 3983 9263

Financial Adviser

Jon Fitzpatrick

Harbour Access                                                                                      +1 (475) 477 9402

USA Investor Relations

Jonathan Paterson