SLE.L Regulatory News (SLE)

San Leon Energy Plc

("San Leon" or the "Company")

Board Appointments

San Leon is delighted to announce the appointments to the Board of Dr John Buggenhagen as Director of Exploration and Daniel Martin as a Non Executive Director. Both of these appointments take place with immediate effect.

Dr John Buggenhagen (41) has been Vice President of Exploration at San Leon and managing the exploration office in Warsaw, Poland, since 2009, having relocated there, from Colorado, with his family last year. He is an exploration geophysicist and proven "oil finder" with more than 15 years experience developing exploration opportunities in North America and Europe. He was European Exploration Manager for Aspect Energy and was a major contributor to the highly successful Horizon Energy in Hungary. He also worked as an exploration geophysicist and prospect generator for ConocoPhilips Alaska (formerly ARCO Alaska) on numerous exploration projects across the North Slope of Alaska. John has a B.S. in Geophysics from the University of Arizona and a M.S and Ph.D. in Geophysics from the University of Wyoming.

(Thomas) Daniel Martin Jr. (52), is a London based commercial lawyer and graduate of Cambridge University, the University of South Carolina, and The American University Law School in Washington, DC. He has extensive legal and corporate finance experience in London and Washington DC and has been a political advisor to two British MP's and two US senators, including Al Gore. Additionally he was former legal advisor to Nissan, Chrysler and Texaco. In 2006 he co-founded Green Corporate Finance ("GCF") which specialises in IPOs, introductions and mergers/acquisitions on the AIM Market; mainly focussing on renewable energy and oil and gas exploration. At GCF he directs strategy, corporate development and legal affairs. He is also a member of the South Carolina Bar and has also been a former member of the District of Columbia Bar.

Oisín Fanning, Chairman of San Leon commented

"We are delighted to welcome both Daniel and John to the Board.

Daniel brings a wealth of expertise that will complement those of the Board and has an intrinsic knowledge of the oil and gas industry and international corporate finance.

John has been with us over a year now and has immense industry and shale gas expertise. In that time he has become an integral part of the team and his ascension to the Board as Director of Exploration is recognition of the role he has played at the company in that time.

We look forward to their contribution and working with them as we continue to aggressively develop our exciting portfolio."

27 August 2010

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Additional Information

The following information is provided pursuant to paragraph (g) Schedule Two of the AIM rules:

There is no further information that is required to be disclosed pursuant to paragraph (g) Schedule Two of the AIM rules in relation to

Mr. Buggenhagen currently does not own any San Leon Energy Ordinary Shares of €0.05 each ("Shares"). He has been granted options over 3,000,000 Shares at an exercise price of 11 pence under the Company's share option scheme, options over 1,000,000 Shares at an exercise price of 17 pence, and options over 5,000,000 shares at an exercise price of 35 pence.

Mr. Martin currently owns 1,134,549 Shares, or 0.27% of San Leon.