179www.tullowoil.com5SUPPLEMENTARY INFORMATION M mmbbl Million barrels mmboe Million barrels of oil equivalent mmscfd Million standard cubic feet per day MoU Memorandum of Understanding MTM Mark To Market N NGO Non-Governmental Organisation P p pence P10 Reserves and/or resources estimates that have a 10 per cent probability of being met or exceeded P50 Reserves and/or resources estimates that have a 50 per cent probability of being met or exceeded PAYE Pay As You Earn PoD Plan of Development PRT Petroleum Revenue Tax PSA Production Sharing Agreement PSC Production Sharing Contract PSP Performance Share Plan R RBM Regional Business Manager S SCT Supplementary Corporation Tax SIP Share Incentive Plan SOP Share Option Plan SPA Sale and Purchase Agreement sq km Square kilometres SRI Socially Responsible Investment T TEED Tullow Education and Enterprise Development Fund TEN Tweneboa - Enyenra - Ntomme TGSS Tullow Group Scholorship Scheme toes Tullow Oil Environmental Standards TSR Total Shareholder Return U UK GAAP UK Generally Accepted Accounting Principles URA Ugandan Revenue Authority V VAT Value Added Tax W WAEP Weighted Average Exercise Price

180Tullow Oil plc 2011 Annual Report and AccountsSTAY UP TO DATEThis report is complemented by a range of online information and resources.WWW.TULLOWOIL.COMThis is our main corporate site. Key sections include our business, investors, media, corporate responsibility and our people. There is also information on our major projects and links to our other websites. Site tools include alert services, social media, and a mobile site. My Tullow is a facility where you can customise the site to suit your preferences and information needs.E-communications. All documents on the website are available to view without any particular software requirement other than the software which is available on the Group's website.. For every shareholder who signs up for electronic communications, a donation is made to the eTree initiative run by Woodland Trust. You can register for email communication at: www.etreeuk.com/tullowoilplcSUPPLIER CENTREIn 2011, Tullow launched an online supplier centre to provide all companies, but particularly local suppliers, with the opportunity to register their interest to become a supplier. Visit: www.tullowoil.com/ supplier_centreWWW.TULLOWOIL.COM/REPORTSWe have a central hub for financial calendar events such as results and the AGM and for our corporate reports. Results webcasts, presentations and fact books are also available here.2011 Annual Report and AccountsVisit: www.tullowoil.com/ara20112011 Corporate Responsibility ReportOur 2011 Corporate Responsibility Report will be published in June 2012. This will also be available online. Visit: www.tullowoil.com/reports