| 2nd Oct 2017 11:00 am | 
                                            RNS | 
                                            Total Voting Rights | 
                                        
                                                                            
                                            | 2nd Oct 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 29th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 28th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 27th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 26th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 25th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 22nd Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 21st Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 20th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 19th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 18th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 15th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 14th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 13th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 12th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 11th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 8th Sep 2017 7:15 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 8th Sep 2017 7:00 am | 
                                            RNS | 
                                            Update on discussions with Northern & Shell | 
                                        
                                                                            
                                            | 7th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 6th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 5th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 4th Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 1st Sep 2017 10:00 am | 
                                            RNS | 
                                            Total Voting Rights | 
                                        
                                                                            
                                            | 1st Sep 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 31st Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 30th Aug 2017 11:00 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 30th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 29th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 25th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 24th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 23rd Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 22nd Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 21st Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 18th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 17th Aug 2017 10:15 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 17th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 16th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 15th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares | 
                                        
                                                                            
                                            | 14th Aug 2017 7:00 am | 
                                            RNS | 
                                            Transaction in Own Shares |