Crossroads Well Southern Oklahoma USA Update

1 May 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, further to the update on 16 April 2026, Reach Oil and Gas Company Inc. (the "Operator"), has informed the Company that the rig at Crossroads Well, located in Southern Oklahoma is still undergoing maintenance and repair. A spud date will be provided in early May.

Union Jack currently holds a 43% interest in the project. The Company's share of the drilling costs have already been funded from its 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