Investor Presentaiton

Highlights Combined Group - key operational metrics ■ Diversified asset base with global footprint ■ High degree of operating control enables opportunity to pursue efficiencies and drive investment decisions ■ Low operating cost base ■ Significant operating cash flow generation ■Material hedging programme ■ Balanced mix of oil vs natural gas 2P reserves as at YE2019 Production by type Opex/bbl - Peers Benchmarking¹ 2020 1H Peer G PremierOil Norwegian Peers UK-Listed Independents Peer F Peer E Peer D Combined Group Peer C Peer B Peer A 0 5 10 15 20 25 Diversification of production 2020 1H ■Operated Non-operated 37% 717 mmboe 63% ■ Oil Gas Combined Group 2020 1H Indonesia NSBA 5% Vietnam - Chim Sao 4% Chrysaor Assets Premier Oil Assets UK - AELE UK Assets UK Other Hub 13% ROW Assets PMO 6% 49% 254 kboepd 51% 11H actuals for Combined Group, Woodmac for peers. Norwegian peers: Lundin Energy Aker BP. UK Peers: Tullow Oil, Energean, Kosmos Energy, Cairn Energy, Enquest Energean benchmark is proforma Edison E&P (transaction signed, still to close) November 2020 UK - Catcher 11% 9% 254 kboepd 91% UK - Other Chrysaor 15% UK - Elgin/Franklin (Chrysaor) 8% UK - Buzzard 8% UK - J-Area Hub 13% UK - Greater Britannia Hub 17% P6

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