THE INFORMATION CONTAINED WITHIN THIS ANNOUNCEMENT IS DEEMED BY THE COMPANY TO CONSTITUTE INSIDE INFORMATION AS STIPULATED UNDER THE MARKET ABUSE REGULATION (EU) NO. 596/2014 AS IT FORMS PART OF UK DOMESTIC LAW PURSUANT TO THE EUROPEAN UNION (WITHDRAWAL) ACT 2018, AS AMENDED. UPON THE PUBLICATION OF THIS ANNOUNCEMENT VIA A REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO BE IN THE PUBLIC DOMAIN.

 19 December 2025

Angus Energy PLC

 ("Angus", the "Company" or together with its subsidiaries, the "Group")

(AIM:ANGS)

Saltfleetby Gas Field Workover

·          Two well coil tubing workover campaign at Saltfleetby

·          Improving production and reliability

Saltfleetby Gas Field Workover

In line with the Company's previously announced production enhancement strategy, Angus is pleased to announce the commencement of a planned workover programme at the Saltfleetby Gas Field. The workovers will be a coil tubing deployed wellbore clean-up in two wells to remove any additives left during the original drilling process, lift accumulated liquids within the wellbore and remediate any near wellbore damage that may have occurred naturally over time.  These workovers aim to improve production and reliability from the two wells.

During the workover programme production will be periodically suspended, with expected uptime at circa 90% in December 2025 and circa 60% in January 2026. The workover programme is designed over two phases, with the physical intervention followed by a clean-up period of approximately four to six weeks, before the results of the workovers can be assessed in March 2026.

Carlos Fernandes, Finance Director comments: "The team has worked diligently on the planning of these production enhancement projects, which are fully supported by the Company's lender, Trafigura. We are excited to have these significant projects underway and look forward to updating the market on the results."

END

For further information please visit www.angusenergy.co.uk.

Angus Energy Plc                                                                

Carlos Fernandes

Finance Director                                                                               Via Flagstaff

SP Angel Corporate Finance LLP (Nomad and Broker)     www.spangel.co.uk

Stuart Gledhill / Jen Clarke / Richard Hail Tel: +44 (0)20 3470 0470

Flagstaff  PR/IR                                                                      [email protected]

Tim Thompson / Fergus Mellon / Alison Alfrey   Tel: +44 (0) 207 129 1474

About Angus Energy plc

Angus Energy plc is a UK AIM quoted independent oil and gas company. Angus is the leading onshore gas producer in the UK and has ambitious plans to grow onshore production and diversify internationally. Angus Energy has a 100% interest in the Saltfleetby Gas Field (PEDL005), majority owns and operates conventional oil production fields at Brockham (PL 235) and Lidsey (PL 241) and has a 25% interest in the Balcombe Licence (PEDL244). Angus Energy operates all fields in which it has an interest.