| 17th Jan 2018 1:00 pm | 
                                            RNS | 
                                            Results of early exchange of convertible bonds | 
                                        
                                                                            
                                            | 17th Jan 2018 7:00 am | 
                                            RNS | 
                                            Early exchange of convertible bonds | 
                                        
                                                                            
                                            | 12th Jan 2018 3:00 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 11th Jan 2018 6:10 pm | 
                                            RNS | 
                                            Invitation for early exchange of convertible bonds | 
                                        
                                                                            
                                            | 11th Jan 2018 7:00 am | 
                                            RNS | 
                                            Trading and Operations Update | 
                                        
                                                                            
                                            | 10th Jan 2018 10:00 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 10th Jan 2018 10:00 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 10th Jan 2018 9:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 5th Jan 2018 11:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 4th Jan 2018 11:00 am | 
                                            RNS | 
                                            Director/PDMR Shareholding | 
                                        
                                                                            
                                            | 4th Jan 2018 11:00 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 2nd Jan 2018 4:00 pm | 
                                            RNS | 
                                            Total Voting Rights and Warrant Update | 
                                        
                                                                            
                                            | 2nd Jan 2018 4:00 pm | 
                                            RNS | 
                                            Block listing Interim Review | 
                                        
                                                                            
                                            | 27th Dec 2017 7:00 am | 
                                            RNS | 
                                            Catcher Area First Oil | 
                                        
                                                                            
                                            | 21st Dec 2017 4:30 pm | 
                                            RNS | 
                                            Completion of the sale of Wytch Farm | 
                                        
                                                                            
                                            | 13th Dec 2017 2:00 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 11th Dec 2017 7:00 am | 
                                            RNS | 
                                            Sale of interest in ETS pipeline | 
                                        
                                                                            
                                            | 7th Dec 2017 11:00 am | 
                                            RNS | 
                                            Result of General Meeting | 
                                        
                                                                            
                                            | 4th Dec 2017 5:30 pm | 
                                            RNS | 
                                            Director/PDMR Shareholding | 
                                        
                                                                            
                                            | 1st Dec 2017 11:00 am | 
                                            RNS | 
                                            Total Voting Rights and Warrant Update | 
                                        
                                                                            
                                            | 21st Nov 2017 12:15 pm | 
                                            RNS | 
                                            Posting of Class 1 Circular | 
                                        
                                                                            
                                            | 21st Nov 2017 9:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 20th Nov 2017 12:30 pm | 
                                            RNS | 
                                            Update on the Sale of Wytch Farm | 
                                        
                                                                            
                                            | 16th Nov 2017 7:00 am | 
                                            RNS | 
                                            Trading and Operations Update | 
                                        
                                                                            
                                            | 15th Nov 2017 11:00 am | 
                                            RNS | 
                                            Total Voting Rights and Warrant Update | 
                                        
                                                                            
                                            | 13th Nov 2017 9:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 10th Nov 2017 9:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 7th Nov 2017 11:00 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 6th Nov 2017 5:30 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 3rd Nov 2017 5:30 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 2nd Nov 2017 4:36 pm | 
                                            RNS | 
                                            Director/PDMR Shareholding | 
                                        
                                                                            
                                            | 2nd Nov 2017 1:00 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 1st Nov 2017 9:00 am | 
                                            RNS | 
                                            Total Voting Rights and Warrant Update | 
                                        
                                                                            
                                            | 26th Oct 2017 9:00 am | 
                                            RNS | 
                                            Additional Listing | 
                                        
                                                                            
                                            | 23rd Oct 2017 2:00 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 23rd Oct 2017 7:00 am | 
                                            RNS | 
                                            Update on the Catcher development | 
                                        
                                                                            
                                            | 12th Oct 2017 2:00 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 10th Oct 2017 4:30 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 10th Oct 2017 4:30 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 4th Oct 2017 11:00 am | 
                                            RNS | 
                                            Holding(s) in Company |