Mosman Oil and Gas Limited

("Mosman" or the "Company")

Amadeus Basin Permit EP145

Mosman Oil and Gas Limited (AIM: MSMN) the oil exploration, development and production company, announces that the relevant Minister in the Northern Territory Government has advised that Mosman's application for a suspension and extension to the work programme conditions for EP145 has been approved.

Mosman will now engage the airborne gravity data acquisition company and as there are not currently any Covid-19 restrictions this survey is able to proceed in the near future.

This results in the suspension and extension mean that the work allocated to be completed in Permit year 3 and was previously due to be completed by 21 August 2021, is now due by 21 August 2022. Subsequent permit years work requirements have also been extended by one year.

John W Barr, Chairman, said: "All going well the gravity will be flown in June and the interpretation will be completed afterwards. The results from the gravity work will provide important details and will also affect the final Seismic programme which is currently in advanced planning stage."

Market Abuse Regulation (MAR) Disclosure

Certain information contained in this announcement would have been deemed inside information for the purposes of Article 7 of Regulation (EU) No 596/2014 until the release of this announcement.

Enquiries:

Mosman Oil & Gas Limited John W Barr, Executive Chairman Andy Carroll, Technical Director

jwbarr@mosmanoilandgas.com acarroll@mosmanoilandgas.com

NOMAD and Broker

SP Angel Corporate Finance LLP

Stuart Gledhill / Richard Hail / Adam Cowl

+44 (0) 20 3470 0470

Alma PR

Justine James

+44 (0) 20 3405 0205

+44 (0) 7525 324431

mosman@almapr.co.uk

Joint Broker

Monecor (London) Ltd trading as ETX Capital Thomas Smith

020 7392 1432

Updates on the Company's activities are regularly posted on its website:

www.mosmanoilandgas.com

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END

MSCDKBBDFBKKKPD

http://www.DigitalLook.com