License Award

Island Oil and Gas PLC 19 March 2008 ISLAND OIL & GAS PLC ('Island' or the 'Company') License Award • Island awarded new frontier license off shore Ireland, Atlantic Margin • Island to operate license • 50% / 50% ownership with Supernova Ireland Resources BV • High risk / reward: multi billion barrel prospect Island Oil & Gas plc, today announces that it has been granted a 50% interest in Frontier Exploration Licence 3/08 covering blocks 61/9, 61/10 and 62/6 in the south of the Porcupine Basin adjacent to the Goban Spur. The Licence, newly named as the 'Tir na nOg Licence', was awarded in the Porcupine Licensing Round. Island will be the operator and Supernova Ireland Resources BV will hold the remaining 50% interest in the new Licence after a joint bidding process. The Tir na nOg Licence, which covers an area of approximately 800 square kilometers, is located in deep water (averaging 1500 meters) on the Atlantic Margin approximately 250 kilometers off the southwest coast of Ireland. The Licence contains one very significant exploration prospect, covering an area of up to 360 square kilometers, which Island believes has the potential to be a multi-billion barrel target Frontier Exploration Licence 3/08 is effective from 12 March 2008 and is valid until 11 March 2021 unless surrendered or revoked. Unless a well is committed to on or before 12 December 2011, the Licence will expire on 11 March 2012. The work programme committed to during the first phase of the licence includes regional desktop studies, basin modeling work and new seismic acquisition. Commenting on the award of the new Frontier Exploration Licence, Paul Griffiths, Chief Executive of Island, stated: 'This area of the Porcupine and Goban Spur Basins is largely underexplored and has been tested by one well to date, 62/7-1. This well was immediately adjacent to our new Licence and encountered good oil shows. We believe this Licence potentially contains a high risk/high reward multi-billion barrel oil prospect. Any success gained through the planned and future work being carried out on the Basin by other operators, will significantly de risk our prospect as well as potentially increase its value. This acquisition therefore not only adds value to our portfolio today, but will continue to increase in value over 2008 and 2009.' 19 March 2008 Further information: Island Oil & Gas plc Paul Griffiths Karl Prenderville Tel: +353 1 6313755 www.islandoilandgas.com Davy (NOMAD and broker) Anthony Farrell Tel: +353 1 679 6363 Landsbanki (UK broker) Simon Robinson Tel: +44 (0)207 426 9000 College Hill (Financial PR) Paddy Blewer Tel: +44 (0)20 7457 2020 Nick Elwes Notes to Editors: Island was founded in 2003 and listed on AIM in December 2004 (LSE:IOG). The Company has interests in eleven Irish offshore licences in both the Celtic Sea and Atlantic Margin. In addition, it is developing a wider portfolio, with potentially valuable licences in the Netherlands, Albania and Morocco. Island is involved in an exploration and appraisal programme which in 2006 and 2007 saw successful Celtic Sea gas wells at the Old Head of Kinsale, Schull and Seven Heads Sub-Area. This information is provided by RNS The company news service from the London Stock Exchange

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