RNS Number : 5166E San Leon Energy PLC 29 September 2008 San Leon Energy Plc ("San Leon" or "the Group") San Leon Energy Admitted to AIM San Leon Energy Plc, an international oil and gas exploration company, is pleased to announce that it has made an application to seek admission of its Ordinary Shares to the AIM Market of the London Stock Exchange. The Ordinary Shares are expected to commence trading on 29 September 2008. Daniel Stewart & Company Plc is acting as both Nominated Adviser and Broker to the Company. The stock market EPIC is SLE.L. Admission Statistics Number of Ordinary Shares in issue immediately following 271,329,367 Admission Market capitalisation of the Company on admission at 37 £100.04 million pence per share Key Highlights & Strengths * A varied portfolio of oil and gas exploration assets in Netherlands, Morocco and the USA; * Best estimate prospective resource volume of 195.6 million barrels of oil estimated by Netherland Sewell & Associates (Competent Person) * Estimated up to 1.053 billion barrels of oil of prospective resources, net to San Leon by Netherland Sewell & Associates * Royalty Agreement in The Netherlands, which will provide cashflow on production * Operational progress in the exploration of its assets * Ongoing negotiations for new licenses and additional exploration areas * An impressive management team that has technical, exploration, commercial and corporate expertise. Reasons for Admission San Leon is seeking Admission for the following reasons: * Provide potential access to capital in order to develop the Group's assets * Facilitate the future raising of finance, both equity and debt * Use quoted shares as acquisition currency * Enhance the Group's profile in the international oil and gas market Summary of the Group's assets Amstel Field Production Royalty. Netherlands * 0.6% production royalty for the 8.5mm boe field offshore Netherlands, operated by Island Oil & Gas Netherlands. * Production is expected to commence in 2010, with a potential income of $4m net to San Leon, providing a strong and guaranteed positive cash flow. DJ Basin, Cheyenne County, Nebraska, United States * 3-D seismic survey completed * 8 drilling targets identified * Drilling programme commenced Q3 2008, to be completed Q1 2009. * High chance of success due to local geological and operational conditions * Targeting 2.7 mmbo & 4.4 bcf natural gas reserves and 2009 - 2010 production Tarfaya exploration license, Morocco * 22.5% working interest of a 13,434 km2 total area * Operated by Island Oil & Gas * 15 onshore leads to be fully examined and assessed for drilling potential * Targeting 711.3 mmboe best estimate unrisked resources (San Leon share 192.9 mmboe) * High estimate prospective resources of 3.8bn boe (1bn boe net to San Leon) by Netherlands and Sewell * Highly prospective region: adjacent to proven fields; big cap operators in place Zag exploration reconnaissance license, Morocco * 50% working interest of a 21,807 km2 total area * Highly prospective basin: adjacent to large commercial finds (750 bcf - 1tcf gas discovery) * Aeromag survey commencing 15 September 2008 * Other licence holders in basin include Petro Cananda (adjacent block) and Repsol * Stage I initial evaluation costs covered. * San Leon has right to extend commitment with an 8 year exploration license, including significant 2D seismic survey to map licence area for drilling targets Oisin Fanning, Chairman of San Leon Energy Plc, commented: "We are delighted to have taken this step in our corporate development. We intend to be extremely proactive in the management of our portfolio, operations and listed status. We are confident that there will be extremely positive news regarding new licences in the short to medium term. We have created a strong and valuable base that we will look to develop in tandem with acquiring and then developing new licences within our portfolio. We are determined that San Leon will gain a reputation for dynamism in both its corporate and operational development. We see this listing as the start of a new chapter in our development. We very much look forward to updating the market in the near future as to our corporate and operational progress." * Ends - 28 September 2008 For further information, please contact: San Leon Energy Plc Oisin Fanning, Chairman Tel: + 353 1291 6292 Phil Thompson, Chief Executive Officer www.sanleonenergy.com Daniel Stewart & Co. Plc Graham Webster/Stewart Dick Tel: +44 (0) 20 7776 6550 www.danielstewart.co.uk College Hill Associates Paddy Blewer/Nick Elwes Tel: +44 (0) 207 457 2020 www.collegehill.com Appendix 1: Directors Biographies Ois Fanning (aged 50), Chairman, has over twenty five years' experience in structured finance, stockbroking and corporate finance, including ten years specialising in the oil & gas industry. From 1999 to 2006 he was chief executive of Smart Telecom plc, from 1993 to 1998 he was chief executive of MMI Stockbrokers and from 1990 to 1993 he was chief executive of Astley Pearce limited. Philip Thompson (aged 48), Chief Executive Officer, has over twenty five years experience in the oil & gas industry throughout Africa, Europe, North America, and South America. Key projects have included oil & gas discoveries in Chad, offshore Holland, onshore USA and offshore Ireland. He has extensive project management, international oil and gas exploration new-ventures and geophysics experience with Exxon, Anadarko (formerly Oryx Energy and Kerr-McGee) and Vanco Energy. He has an M.Sc. in Geophysics from Southern Methodist University and a B.Sc. in Geophysics from Texas A&M University. Charles McEvoy (aged 53), Director, has over 25 year operational, engineering and business development experience. He has been involved with major blue chip organisations within the manufacturing and service industries, including Intel, ADT and in business restructuring with Eircom. Paul Sullivan (aged 51), Director, has over thirty years experience in corporate treasury and operations within banking, including with Nordbanken NY, Standard Chartered Bank, Dublin, and BNP Paribas, Dublin. Jeremy Boak Ph D (aged 56), Non-Executive Director, is Project Manager with the Colorado Energy Research Institute (CERI) and the Los Alamos National Laboratory and the U. S. Department of Energy (DOE). He chaired international symposia on the development of oil shale and he carried out geological investigations for exploration and development in Alaska, Colorado, Oklahoma, Texas and California. He is affiliated to the Geological Society of America, American Association of Petroleum Geologists (AAPG), AAPG Division of Environmental Geology, American Nuclear Society. Dr Boak is extensively published and has a Ph.D. and BA in Geology from Harvard University and an M.S. Geology from the University of Washington. Ray King (aged 66), Non-Executive Director, is a qualified Chartered Secretary, Compliance Officer, Information Technologist, Banker and Accountant. He has considerable experience in Finance and IT and has been a Chartered Secretary for 40 years. From 1958 to 1986 he worked for the Natwest Group. He was also associate director of Christiana Bank, general manager of operations, Moscow Narodny Bank; company secretary, SIM Group and chairman of Smart Telecom plc. He has acted in various senior executive and non-executive director roles, such as finance director, managing director and chairman of companies which have been brought to AIM, NASDAQ and OFEX (now PLUS Markets). In all companies he has also acted as company secretary.

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