| 4th Jul 2017 1:55 pm | RNS | Holdings in Company | 
                                                                            
                                            | 3rd Jul 2017 7:00 am | RNS | Reference Standards support successful FDA filing | 
                                                                            
                                            | 28th Jun 2017 10:57 am | RNS | Result of AGM | 
                                                                            
                                            | 26th Jun 2017 1:54 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 16th Jun 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 6th Jun 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 2nd Jun 2017 7:00 am | RNS | Annual Report and Notice of Annual General Meeting | 
                                                                            
                                            | 31st May 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 30th May 2017 7:00 am | RNS | Preliminary Results Year Ended 31 December 2016 | 
                                                                            
                                            | 22nd May 2017 7:00 am | RNS | HZD Licenses New Gene Editing Technology Platform | 
                                                                            
                                            | 9th May 2017 7:00 am | RNS | Performance update in Immuno-Oncology | 
                                                                            
                                            | 21st Apr 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 19th Apr 2017 7:00 am | RNS | Notice of Results | 
                                                                            
                                            | 11th Apr 2017 2:57 pm | RNS | Holdings in Company | 
                                                                            
                                            | 7th Apr 2017 5:01 pm | RNS | Grant of Options | 
                                                                            
                                            | 6th Apr 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 30th Mar 2017 9:08 am | RNS | Holdings in Company | 
                                                                            
                                            | 24th Mar 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 23rd Mar 2017 11:24 am | RNS | Holdings in Company | 
                                                                            
                                            | 20th Mar 2017 10:42 am | RNS | Holdings in Company | 
                                                                            
                                            | 14th Mar 2017 7:00 am | RNS | Agreement for NIPT Reference Standards | 
                                                                            
                                            | 23rd Feb 2017 7:00 am | RNS | Site Visit | 
                                                                            
                                            | 20th Feb 2017 1:21 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 15th Feb 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 14th Feb 2017 7:00 am | RNS | Master Service Agreement with Top 3 Pharma Company | 
                                                                            
                                            | 10th Feb 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 31st Jan 2017 3:06 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 31st Jan 2017 7:00 am | RNS | Issue of Equity | 
                                                                            
                                            | 26th Jan 2017 1:50 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 24th Jan 2017 7:00 am | RNS | Trading Update | 
                                                                            
                                            | 16th Jan 2017 7:00 am | RNS | Horizon broadens gene editing capabilities | 
                                                                            
                                            | 13th Jan 2017 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 6th Jan 2017 1:24 pm | RNS | Additional Listing | 
                                                                            
                                            | 29th Dec 2016 10:28 am | RNS | Holding(s) in Company | 
                                                                            
                                            | 15th Dec 2016 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 2nd Dec 2016 11:30 am | RNS | Director/PDMR Shareholding | 
                                                                            
                                            | 2nd Dec 2016 10:00 am | RNS | Director Dealings | 
                                                                            
                                            | 16th Nov 2016 7:00 am | RNS | HZD Enters Chinese Clinical Diagnostics Market | 
                                                                            
                                            | 14th Nov 2016 7:00 am | RNS | Additional Listing | 
                                                                            
                                            | 9th Nov 2016 7:00 am | RNS | OEM Agreement with CareDx for Reference Standards |