Name and address of the reporting corporation: ENSCO International Incorporated 500 North Akard Suite 4300 Dallas, TX 75201-3331 Date of transaction: 12/23/2009 Description of the transaction At 12:01 a.m., Eastern Standard Time, on December 23, 2009, Ensco Newcastle LLC, a Delaware limited liability company (“Mergeco”), merged with and into ENSCO International Incorporated, A Delaware corporation (“Ensco Delaware”). Mergeco was an indirect, wholly-owned subsidiary of Ensco International plc, a public limited company organized under the laws of England and Wales (“Ensco UK”). Ensco Delaware survived the merger as an indirect, wholly-owned subsidiary of Ensco UK. Each share of Ensco Delaware common stock was automatically cancelled and converted into the right to receive one American depositary share (“ADS”) representing one Class A Ordinary Share of Ensco UK. Each outstanding limited liability company interest in Mergeco was converted into one share of common stock of Ensco Delaware, as the surviving corporation in the merger. Upon completion of the merger, Ensco UK indirectly (through a disregarded entity) owns all of the issued and outstanding shares of Ensco Delaware. Accordingly, Ensco UK acquired control of Ensco Delaware for purposes of IRS Form 8806, Information Return for Acquisition of Control of Substantial Change in Capital Structure. Did the reporting corporation’s shareholders receive any stock or other property in exchange for their stock in the reporting corporation, for which the reporting corporation has reasonably determined that the shareholders are required to recognize gain (if any).from the exchange of such stock? Yes Fair market value of the stock or other property received The fair market value of each ADS received by an Ensco Delaware shareholder pursuant to the merger is $42.18, determined by the average of the high (($42.60) and low ($41.75) selling prices of an ADS on December 23, 2009. Description of the stock or other property received Each shareholder of Ensco Delaware received an ADS representing one Class A Ordinary Share of Ensco UK in exchange for each share of Ensco Delaware common stock.