Ensco plc Substitute Power of Attorney Pursuant to the powers of attorney, copies of which were previously filed with the Securities and Exchange Commission (the "SEC") on the dates listed below (collectively, the "Powers of Attorney"), each of the following officers and/or directors of Ensco plc, a public limited company organized under the laws of England and Wales (the "Company"), on the dates indicated below next to such person's name, appointed Elizabeth A. Cook as such person's true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, to do and perform every act whatsoever necessary or desirable to be done in the exercise of the rights and powers granted in the Power of Attorney executed by such person: Name Executed Filed with SEC Steven Joseph Brady June 28, 2013 September 6, 2013 John Mark Burns June 25, 2013 September 6, 2013 Robert W. Edwards, III June 27, 2013 July 11, 2013 David Ethan Hensel January 13, 2014 January 16, 2014 John Stokes Knowlton June 27, 2013 August 5, 2013 Brady K. Long June 28, 2013 February 14, 2014 Patrick Carey Lowe June 28, 2013 November 20, 2013 Gilles Luca December 1, 2014 December 3, 2014 James W. Swent, III June 28, 2013 August 5, 2013 Carl Trowell May 21, 2014 June 2, 2014 The undersigned, pursuant to the powers granted in the Powers of Attorney, hereby constitutes and appoints Davor S. Vukadin as substitute to the undersigned attorney-in-fact, with full power and authority to do and perform every act without any other and with full power of substitution and resubstitution, to exercise and execute all of the powers granted to the undersigned in the Powers of Attorney. For the avoidance of doubt, the foregoing appointment shall not serve as a revocation of the powers granted to the undersigned in the Powers of Attorney. This Substitute Power of Attorney shall remain in full force and effect with respect to each individual listed above, until the underlying Power of Attorney is revoked or terminated, unless earlier revoked by the undersigned in a signed writing. IN WITNESS THEREOF, the undersigned has caused this Substitute Power of Attorney to be executed as of this 29th day of May, 2015. By: /s/ Elizabeth A. Cook Name: Elizabeth A. Cook Title: Attorney-in-Fact
