SLE.L Regulatory News (SLE)

Recommended Acquisition of Island Oil & Gas plc by San Leon Energy plc to be effected by means of a Scheme of Arrangement

AMENDMENT TO TIMETABLE

Further to the announcement on 25 February 2010, relating to the recommended share for share acquisition of the entire issued and to be issued share capital of Island Oil & Gas plc ("Island") by San Leon Energy plc ('San Leon') to be effected by means of a Scheme of Arrangement, Island announces an amendment to the anticipated timetable

The anticipated timeline of the remaining principal events required to implement the Scheme is as follows:

Terms defined in the Scheme Document sent to Island Shareholders on 23 March 2010 have the same meaning asin this announcement.

For further information contact:

Island Oil & Gas plc + 353 1631 3755

Carl Kindinger

Davy Corporate Finance (Financial adviser to Island) + 353 1679 6363

Anthony Farrell

San Leon Energy plc + 353 1291 6292

Oisin Fanning, Chairman

Philip Thompson, Chief Executive Officer

Arbuthnot Securities Ltd (Financial adviser to San Leon) + 44 20 7012 2000

Nick Tulloch

Alasdair Younie

The Island Directors accept responsibility for the information contained in this announcement, except for the information for which responsibility is taken by the San Leon Directors. To the best of the knowledge and belief of the Island Directors (who have taken all reasonable care to ensure that such is the case) the information contained in this announcement for which they are responsible is in accordance with the facts and does not omit anything likely to affect the import of such information.

The San Leon Directors accept responsibility for the information contained in this announcement relating to San Leon, the directors of San Leon, related trusts and any persons connected with them. To the best of the knowledge and belief of the San Leon Directors (who have taken all reasonable care to ensure that such is the case) the information contained in this announcement for which they are responsible is in accordance with the facts and does not omit anything likely to affect the import of such information.

The distribution of this announcement in jurisdictions in or into certain jurisdictions may be restricted by the laws of those jurisdictions. Accordingly, copies of this announcement and all other documents relating to the Acquisition and/or the Scheme are not being, and must not be, released, published, mailed or otherwise forwarded, distributed or sent in, into or from any Restricted Jurisdiction. Persons receiving such documents (including, without limitation, nominees, trustees and custodians) should observe these restrictions. Failure to do so may constitute a violation of the securities laws of any such jurisdiction.

Davy Corporate Finance, which is authorised and regulated in Ireland by the Financial Regulator, is acting for Island and no one else in relation to the Acquisition and the Scheme and will not be responsible to anyone other than Island for providing the protections afforded to clients of Davy Corporate Finance nor for providing advice in relation to the Acquisition and the Scheme or any other matter referred to herein.

Arbuthnot Securities Limited, which is authorised and regulated in the United Kingdom by the Financial Services Authority is acting exclusively for San Leon and is acting for no one else in connection with the Acquisition and the Scheme and will not be responsible to anyone other than San Leon for providing the protections afforded to clients of Arbuthnot Securities Limited or for providing advice in relation to the Acquisition and the Scheme or any other matter referred to herein.