26 May 2011

DEO Petroleum PLC

Appointment of Nominated Advisor and Broker

DEO Petroleum plc (AIM: DEO), the North Sea oil & gas company, announces that it has appointed Canaccord Genuity Ltd. as its Nominated Adviser and Joint Broker with immediate effect. FirstEnergy Capital LLP will remain joint broker to the company.

Enquiries:

DEO Petroleum

David Marshall, CEO

Heather Ruth, Communications Officer

Tel: +44 (0) 1224 548777

Canaccord Genuity

Charles Berkeley/ Henry Fitzgerald-O’Connor

Tel: +44 (0) 207 050 6500

College Hill

Simon Whitehead / Nick Elwes

Tel: +44 (0) 20 7457 2020