| 8th Jun 2007 7:00 am | PRN | Transaction in Own Shares | 
                                                                            
                                            | 7th Jun 2007 7:02 am | RNS | Final Results | 
                                                                            
                                            | 1st Jun 2007 5:10 pm | PRN | Total Voting Rights | 
                                                                            
                                            | 30th May 2007 7:01 am | RNS | New Non-Executive Director | 
                                                                            
                                            | 23rd May 2007 5:24 pm | PRN | Holding(s) in Company | 
                                                                            
                                            | 17th May 2007 4:26 pm | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 1st May 2007 1:54 pm | PRN | Total Voting Rights | 
                                                                            
                                            | 19th Apr 2007 12:13 pm | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 16th Apr 2007 9:00 am | RNS | New Non-Executive Director | 
                                                                            
                                            | 11th Apr 2007 6:04 pm | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 11th Apr 2007 4:15 pm | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 11th Apr 2007 9:32 am | PRN | Total Voting Rights | 
                                                                            
                                            | 29th Mar 2007 10:47 am | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 28th Mar 2007 7:01 am | RNS | Trading Statement | 
                                                                            
                                            | 23rd Mar 2007 2:13 pm | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 22nd Mar 2007 5:57 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 21st Mar 2007 5:20 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 21st Mar 2007 8:41 am | PRN | Transaction in Own Shares | 
                                                                            
                                            | 19th Mar 2007 5:52 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 16th Mar 2007 5:03 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 16th Mar 2007 11:32 am | PRN | Holding(s) in Company | 
                                                                            
                                            | 15th Mar 2007 6:19 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 15th Mar 2007 9:17 am | PRN | Transaction in Own Shares | 
                                                                            
                                            | 13th Mar 2007 5:34 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 12th Mar 2007 6:28 pm | PRN | Transaction in Own Shares - Correction | 
                                                                            
                                            | 12th Mar 2007 6:10 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 9th Mar 2007 4:54 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 9th Mar 2007 2:39 pm | PRN | Holding(s) in Company | 
                                                                            
                                            | 8th Mar 2007 5:02 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 7th Mar 2007 5:23 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 7th Mar 2007 7:00 am | PRN | Transaction in Own Shares | 
                                                                            
                                            | 5th Mar 2007 5:20 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 2nd Mar 2007 4:56 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 2nd Mar 2007 2:50 pm | PRN | Holding(s) in Company | 
                                                                            
                                            | 1st Mar 2007 5:46 pm | PRN | Transaction in Own Shares | 
                                                                            
                                            | 1st Mar 2007 11:31 am | PRN | Total Voting Rights | 
                                                                            
                                            | 1st Mar 2007 7:03 am | RNS | Disposal | 
                                                                            
                                            | 26th Feb 2007 5:10 pm | PRN | Holding(s) in Company | 
                                                                            
                                            | 22nd Feb 2007 11:21 am | PRN | Director/PDMR Shareholding | 
                                                                            
                                            | 13th Feb 2007 2:39 pm | RNS | Collaboration Agreement |