| 3rd Dec 2020 3:47 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 1st Dec 2020 7:00 am | RNS | Exercise of warrants and issue of equity | 
                                                                            
                                            | 5th Nov 2020 4:50 pm | RNS | Director Dealing | 
                                                                            
                                            | 3rd Nov 2020 7:00 am | RNS | Capital Markets Day | 
                                                                            
                                            | 30th Oct 2020 7:00 am | RNS | Notice of Capital Markets Day | 
                                                                            
                                            | 26th Oct 2020 5:07 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 26th Oct 2020 10:58 am | RNS | Completion of acquisition of LAICA S.p.A | 
                                                                            
                                            | 23rd Oct 2020 5:55 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 14th Oct 2020 7:00 am | RNS | Update on conditional acquisition of LAICA S.p.A | 
                                                                            
                                            | 23rd Sep 2020 7:01 am | RNS | Conditional acquisition of LAICA S.p.A | 
                                                                            
                                            | 23rd Sep 2020 7:00 am | RNS | Interim Results | 
                                                                            
                                            | 7th Sep 2020 7:00 am | RNS | Equity Development Investor Webinar | 
                                                                            
                                            | 2nd Sep 2020 7:00 am | RNS | Update on the HaloPure Technology | 
                                                                            
                                            | 18th Aug 2020 8:32 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 17th Aug 2020 11:05 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 13th Aug 2020 4:56 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 23rd Jul 2020 7:00 am | RNS | Pre-Close Trading Update and Notice of Results | 
                                                                            
                                            | 10th Jun 2020 7:00 am | RNS | PDMR Dealings | 
                                                                            
                                            | 28th May 2020 11:51 am | RNS | Result of AGM | 
                                                                            
                                            | 28th May 2020 7:00 am | RNS | AGM Statement and New Banking Facilities | 
                                                                            
                                            | 4th May 2020 7:00 am | RNS | Dividend Confirmation, Annual Report & AGM Notice | 
                                                                            
                                            | 1st May 2020 12:45 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 15th Apr 2020 12:41 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 14th Apr 2020 5:26 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 9th Apr 2020 4:52 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 6th Apr 2020 7:00 am | RNS | Exercise and Grant of Options | 
                                                                            
                                            | 31st Mar 2020 12:58 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 23rd Mar 2020 9:49 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 18th Mar 2020 7:00 am | RNS | Appointment of Non-executive Director | 
                                                                            
                                            | 18th Mar 2020 7:00 am | RNS | Final Results | 
                                                                            
                                            | 19th Feb 2020 7:00 am | RNS | Statement Regarding Current Situation in China | 
                                                                            
                                            | 6th Feb 2020 7:00 am | RNS | Appointment of Joint Corporate Broker | 
                                                                            
                                            | 27th Jan 2020 7:00 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 23rd Jan 2020 7:00 am | RNS | Pre-Close Trading Update | 
                                                                            
                                            | 31st Dec 2019 7:00 am | RNS | Block Listing Application | 
                                                                            
                                            | 22nd Nov 2019 10:36 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 11th Nov 2019 3:05 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 11th Oct 2019 9:43 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 18th Sep 2019 7:00 am | RNS | Interim Results | 
                                                                            
                                            | 6th Sep 2019 12:20 pm | RNS | Holding(s) in Company |