CERP.L Regulatory News (CERP)

For Immediate Release

23 May 2011

LENI GAS AND OIL PLC

("LGO" or the "Company")

Gulf of Mexico Update

Leni Gas & Oil plc today announces resumption of operations in the Gulf of Mexico following the recent announcements by Leed Petroleum plc ("Leed").

Leed has announced that it has sold all its Gulf of Mexico properties and LGO has been advised that the new operator will be Marlin Energy LLC ("Marlin"), a private oil and gas operations company, based in Lafayette, Louisiana.

LGO met with Marlin last week and expect that production operations at Eugene Island 184 will be restored by early June and understand that Marlin are planning new sidetrack developments on EI 184 in the coming months to lift production.

Neil Ritson, LGO's Chief Executive, stated: "We are pleased that the operations will shortly be restored and that the hiatus has been kept as brief as possible, and we look forward to working with the new operator in order to accelerate the pace of development on these properties."

Competent Person's Statement:

The information contained in this announcement has been reviewed and approved by Neil Ritson, Chief Executive Officer and Director for Leni Gas & Oil Plc who has 35 years of relevant experience in the oil industry. Mr. Ritson is a member of the Society of Petroleum Engineers, an Active Member of the American Association of Petroleum Geologists and is a Fellow of the Geological Society of London.

Enquiries:

Leni Gas & Oil plc

David Lenigas, Executive Chairman

Neil Ritson, Chief Executive Officer

Tel +44 (0) 20 7016 5103

Panmure Gordon plc

Katherine Roe / Hannah Woodley

Tel +44 (0)20 7459 5744

Beaumont Cornish Limited

Roland Cornish / Rosalind Hill Abrahams

Tel +44 (0) 20 7628 3396

Pelham Bell Pottinger

Mark Antelme / Henry Lerwill

Tel + 44 (0)20 7861 3232

NOTES TO EDITORS

Leni Gas & Oil Plc is an international oil and gas exploration, development and production company headquartered in London, trading on the London Stock Exchange's AIM index. LGO's strategy is to acquire projects and businesses within the oil and gas sector that contain a development premium which can be unlocked through a combination of financial, commercial, and technical expertise.

LGO operates a low risk portfolio of production expansion assets in the US Gulf of Mexico, Spain and Trinidad, and holds non-operated exploration acreage Malta. LGO's assets have significant play upside using strategies which leverage novel extraction technologies and proven production enhancement techniques. LGO specifically targets near term production with upside exploitation potential and manages its portfolio to ensure all assets have accelerated incremental reserves and production enhancement programmes.