| 31st Jan 2019 11:31 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 30th Jan 2019 5:36 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 30th Jan 2019 9:24 am | RNS | Directorate Change | 
                                                                            
                                            | 29th Jan 2019 6:18 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 28th Jan 2019 6:16 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 28th Jan 2019 6:16 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 25th Jan 2019 4:31 pm | RNS | Block listing Interim Review | 
                                                                            
                                            | 17th Jan 2019 5:38 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 16th Jan 2019 5:23 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 15th Jan 2019 5:43 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 14th Jan 2019 5:46 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 11th Jan 2019 5:28 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 7th Jan 2019 5:44 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 7th Jan 2019 5:28 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 4th Jan 2019 5:35 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 3rd Jan 2019 5:48 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 3rd Jan 2019 5:38 pm | RNS | Transaction in Own Shares | 
                                                                            
                                            | 3rd Jan 2019 7:00 am | RNS | Trading Statement | 
                                                                            
                                            | 2nd Jan 2019 11:26 am | RNS | Directorate Change | 
                                                                            
                                            | 31st Dec 2018 12:00 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 5th Dec 2018 7:00 am | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 3rd Dec 2018 4:00 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 30th Nov 2018 4:19 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 31st Oct 2018 5:00 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 31st Oct 2018 4:46 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 31st Oct 2018 7:00 am | RNS | Trading Statement | 
                                                                            
                                            | 12th Oct 2018 5:02 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 11th Oct 2018 4:54 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 3rd Oct 2018 12:49 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 28th Sep 2018 4:43 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 27th Sep 2018 5:08 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 27th Sep 2018 5:02 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 27th Sep 2018 4:56 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 26th Sep 2018 1:48 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 25th Sep 2018 7:00 am | RNS | Results for the Half Year Ending July 2018 | 
                                                                            
                                            | 31st Aug 2018 4:45 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 9th Aug 2018 5:54 pm | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 7th Aug 2018 3:30 pm | RNS | Form 8.3 - NXG/CME | 
                                                                            
                                            | 1st Aug 2018 7:00 am | RNS | Trading Statement | 
                                                                            
                                            | 31st Jul 2018 4:45 pm | RNS | Total Voting Rights |