School children attending the Damas School, Libreville, Gabon.

SUPPLEMENTARY INFORMATION480Independent Assurance ReportIn 2011, Deloitte LLP performed assurance as defined in ISAE 3000 on Group-level compilation of environment, safety and social performance indicators.81Supplementary DataIn addition to this supplementary information, the basis of reporting is published online at www.tullowoil.com/crr2011/bor84Key Corporate Responsibility Policies and Systems85Glossary86Index87Contacts and feedback88Other resourcesCOMMITMENT TO TULLOW & EACH OTHERWe work in a collaborative manner, empowering ourselves and others whilst taking responsibility for our own actions.