| 2nd Feb 2015 3:30 pm | RNS | Total Voting Rights | 
                                                                            
                                            | 30th Jan 2015 6:15 pm | RNS | Director Shareholding | 
                                                                            
                                            | 28th Jan 2015 4:40 pm | RNS | Second Price Monitoring Extn | 
                                                                            
                                            | 28th Jan 2015 4:35 pm | RNS | Price Monitoring Extension | 
                                                                            
                                            | 23rd Jan 2015 7:00 am | RNS | Xeros adds US patent | 
                                                                            
                                            | 21st Jan 2015 5:45 pm | RNS | Application for Block Listing | 
                                                                            
                                            | 20th Jan 2015 4:35 pm | RNS | Price Monitoring Extension | 
                                                                            
                                            | 22nd Dec 2014 2:09 pm | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 9th Dec 2014 11:00 am | RNS | Result of AGM | 
                                                                            
                                            | 3rd Nov 2014 3:45 pm | RNS | Notice of AGM & Posting of Annual Report | 
                                                                            
                                            | 28th Oct 2014 10:45 am | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 22nd Oct 2014 7:01 am | RNS | FINAL RESULTS FOR THE YEAR ENDED 31 JULY 2014 | 
                                                                            
                                            | 22nd Oct 2014 7:00 am | RNS | New Director Appointment | 
                                                                            
                                            | 20th Oct 2014 7:00 am | RNS | FURTHER INCENTIVE PROGRAMMES FROM US | 
                                                                            
                                            | 30th Sep 2014 2:15 pm | RNS | Holding(s) in Company | 
                                                                            
                                            | 29th Sep 2014 7:00 am | RNS | Notice of Full Year Results & Capital Markets Day | 
                                                                            
                                            | 22nd Sep 2014 7:00 am | RNS | Update on Contract Wins | 
                                                                            
                                            | 3rd Jul 2014 7:00 am | RNS | AWARD OF CIP ECO-INNOVATION GRANT | 
                                                                            
                                            | 18th Jun 2014 4:08 pm | RNS | Board Change | 
                                                                            
                                            | 29th May 2014 3:17 pm | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 29th May 2014 7:00 am | RNS | FIRST INCENTIVE PAYMENT BY A UTILITY | 
                                                                            
                                            | 22nd May 2014 12:09 pm | RNS | ISSUE OF SHARES | 
                                                                            
                                            | 15th May 2014 7:00 am | RNS | Director Share Purchase | 
                                                                            
                                            | 1st May 2014 2:30 pm | RNS | Director / Senior Executive Share Purchases | 
                                                                            
                                            | 30th Apr 2014 7:00 am | RNS | Interim Results | 
                                                                            
                                            | 25th Apr 2014 7:00 am | RNS | Notice of Results | 
                                                                            
                                            | 28th Mar 2014 11:22 am | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 27th Mar 2014 3:30 pm | RNS | TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES | 
                                                                            
                                            | 25th Mar 2014 7:01 am | RNS | Admission and First Day of Dealings on AIM |