17 December 2014

Mosman Oil and Gas Limited

("Mosman" or the "Company")

Issue of Trident Debt Shares

The Directors of Mosman Oil and Gas Limited (AIM: MSMN) the New Zealand and Australia focussed oil exploration and development company have today issued and allotted 1,000,000 Trident Debt Shares at a price of AUD$0.50 (approximately £0.26 per share) in full and final settlement of AUD$500,000 of debts owing by its subsidiary, Trident Energy Limited ("Trident"), to current and former directors of Trident in accordance with the terms and conditions of the Bid Implementation Agreement dated 22 August 2014. The Trident Debt Shares are subject to a 12 month Lock-In.

The issue of the Trident Debt Shares is conditional on 1,000,000 new Ordinary Shares in the capital of the Company (the "Trident Debt Shares") being admitted to trading on AIM.

An application has been made to the London Stock Exchange for the Trident Debt Shares, which will rank pari passu with the Company's existing issued Ordinary Shares, to be admitted to trading and dealings are expected to commence at 8:00 a.m. (GMT) on 23 December 2014.

Following the issue of the Trident Debt Shares the Company's total issued share capital will comprise 91,804,308 Ordinary Shares. In accordance with the Financial Conduct Authority Disclosure and Transparency Rules, the Company has 91,804,308 Ordinary Shares in issue, each share carrying the right to one vote. The Company does not hold any Ordinary Shares in Treasury.

The above figure of 91,804,308 Ordinary Shares may be used by Shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the Financial Conduct Authority's Disclosure and Transparency Rules.

Enquiries:

Updates on the Company's activities are regularly posted on its website www.mosmanoilandgas.com

About Mosman

Mosman (AIM: MSMN) is an Australia and New Zealand focused oil exploration and development company with a strategy to build a sustainable mid-tier oil and gas business by acquisition and organic growth.

Currently, Mosman has a total of ten permits or accepted permit applications in New Zealand and Australia.

Petroleum Creek Project, New Zealand

Mosman owns 100% of permit PEP 38526, the Petroleum Creek Project, which is a 143.6 sq. km low cost onshore exploration project located near Greymouth on the South Island in the southern extension of the proven Taranaki oil system.

Taramakau, Murchison and East Coast Permits (New Zealand)

These permits were granted to Mosman in December 2014 as part of the 2014 Block Offer.

Officer Basin Project, Australia (Application)

Mosman has a 25% investment in the Officer Basin Project, a 22,527 sq. km large land holding with significant exploration potential, which lies in one of the more explored parts of the Basin with road access. The project area is in the Western Australian part of the Officer Basin and offers both conventional and unconventional potential with hydrocarbon shows reported and all elements of a petroleum system are present.

Amadeus Basin Projects, Australia

Mosman owns 100% of two granted permits and one application in the Amadeus Basin in Central Australia which total of 5,458 sq. km. The Amadeus Basin is considered one of the most prospective onshore areas in the Northern Territory of Australia for both conventional and unconventional oil and gas, and hosts the producing Mereenie, Palm Valley and Surprise fields.

Otway Basin Project, Australia

Mosman owns 30% of VIC/P62 in the Otway Basin. The permit was recently renewed and is in relatively shallow water. The 70% permit holder funded a 3D seismic survey in 2013. The results of the 3D seismic survey are now being integrated in to a geological model to allow identification and ranking of drilling targets. Within the Otway Basin there is commercial production both onshore and offshore.