| 12th Aug 2016 7:00 am | 
                                            RNS | 
                                            Directorate Change | 
                                        
                                                                            
                                            | 12th Aug 2016 7:00 am | 
                                            RNS | 
                                            Period end trading update and notice of results | 
                                        
                                                                            
                                            | 8th Aug 2016 7:00 am | 
                                            RNS | 
                                            Product Development and New JDA | 
                                        
                                                                            
                                            | 23rd Mar 2016 7:00 am | 
                                            RNS | 
                                            Interim Results | 
                                        
                                                                            
                                            | 26th Jan 2016 3:21 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 26th Jan 2016 12:15 pm | 
                                            RNS | 
                                            Result of AGM | 
                                        
                                                                            
                                            | 25th Jan 2016 7:00 am | 
                                            RNS | 
                                            AGM Statement | 
                                        
                                                                            
                                            | 22nd Jan 2016 10:33 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 13th Jan 2016 9:08 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 11th Jan 2016 3:42 pm | 
                                            RNS | 
                                            Issue of share options to Directors | 
                                        
                                                                            
                                            | 11th Jan 2016 3:36 pm | 
                                            RNS | 
                                            Director/PDMR Shareholding | 
                                        
                                                                            
                                            | 8th Jan 2016 12:13 pm | 
                                            RNS | 
                                            Result of Meeting | 
                                        
                                                                            
                                            | 18th Dec 2015 7:00 am | 
                                            RNS | 
                                            Placing and Open Offer | 
                                        
                                                                            
                                            | 16th Nov 2015 7:00 am | 
                                            RNS | 
                                            Full Year Results | 
                                        
                                                                            
                                            | 23rd Oct 2015 7:00 am | 
                                            RNS | 
                                            Joint Development Agreements and Collaborations | 
                                        
                                                                            
                                            | 21st Sep 2015 5:19 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 18th Sep 2015 7:00 am | 
                                            RNS | 
                                            Period end trading update | 
                                        
                                                                            
                                            | 9th Jul 2015 7:00 am | 
                                            RNS | 
                                            Issue of share options to Directors | 
                                        
                                                                            
                                            | 30th Jun 2015 3:36 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 17th Jun 2015 7:00 am | 
                                            RNS | 
                                            First Patent Approval | 
                                        
                                                                            
                                            | 19th May 2015 4:40 pm | 
                                            RNS | 
                                            Second Price Monitoring Extn | 
                                        
                                                                            
                                            | 19th May 2015 4:35 pm | 
                                            RNS | 
                                            Price Monitoring Extension | 
                                        
                                                                            
                                            | 14th May 2015 7:00 am | 
                                            RNS | 
                                            Positive results from independent oil trials | 
                                        
                                                                            
                                            | 27th Apr 2015 9:21 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 22nd Apr 2015 4:44 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 22nd Apr 2015 3:28 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 21st Apr 2015 4:46 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 17th Apr 2015 7:00 am | 
                                            RNS | 
                                            Positive results from independent coatings trials | 
                                        
                                                                            
                                            | 2nd Apr 2015 9:46 am | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 1st Apr 2015 4:39 pm | 
                                            RNS | 
                                            Holding(s) in Company | 
                                        
                                                                            
                                            | 25th Mar 2015 7:00 am | 
                                            RNS | 
                                            Interim Results | 
                                        
                                                                            
                                            | 3rd Feb 2015 7:00 am | 
                                            RNS | 
                                            Trading Update | 
                                        
                                                                            
                                            | 27th Jan 2015 11:25 am | 
                                            RNS | 
                                            Issue of equity and total voting rights | 
                                        
                                                                            
                                            | 22nd Jan 2015 7:00 am | 
                                            RNS | 
                                            Senior Management Appointments | 
                                        
                                                                            
                                            | 22nd Dec 2014 7:00 am | 
                                            RNS | 
                                            Directorate Change | 
                                        
                                                                            
                                            | 15th Dec 2014 11:36 am | 
                                            RNS | 
                                            Result of AGM | 
                                        
                                                                            
                                            | 15th Dec 2014 7:00 am | 
                                            RNS | 
                                            AGM Statement | 
                                        
                                                                            
                                            | 24th Nov 2014 7:00 am | 
                                            RNS | 
                                            Posting of Annual Report and Notice of AGM | 
                                        
                                                                            
                                            | 17th Nov 2014 7:00 am | 
                                            RNS | 
                                            Investor site visit | 
                                        
                                                                            
                                            | 5th Nov 2014 7:00 am | 
                                            RNS | 
                                            Appointment of Non-Executive Director |