| 16-Feb-12 12:47 | RNS | Further re Rights Issue | Company Announcement - General |
| 01-Feb-12 15:50 | RNS | Short Selling Disclosure | Company Announcement - General |
| 01-Feb-12 13:51 | RNS | Holding(s) in Company | Holding(s) in Company |
| 19-Dec-11 11:01 | RNS | Short Selling Disclosure wrt to rights | Company Announcement - General |
| 19-Dec-11 11:01 | RNS | Short Selling Disclosure wrt to rights | Company Announcement - General |
| 19-Dec-11 10:53 | RNS | Short Selling Disclosure wrt to rights | Company Announcement - General |
| 16-Dec-11 14:18 | RNS | Disclosure of Short Position | Company Announcement - General |
| 15-Dec-11 07:00 | RNS | Directorate Change | Executive Changes |
| 15-Dec-11 07:00 | RNS | Rights Issue | Company Announcement - General |
| 15-Dec-11 07:00 | RNS | Final Results | Results and Trading Reports |
| 01-Dec-11 10:01 | RNS | Results Webcast | Company Announcement - General |
| 09-Nov-11 13:00 | RNS | Product Launch | Company Announcement - General |
| 31-Oct-11 10:46 | RNS | Replacement:Notice of Results | Advance Notice of Results |
| 31-Oct-11 08:00 | RNS | Notice of Results | Advance Notice of Results |
| 05-Oct-11 16:30 | RNS | Holding(s) in Company | Holding(s) in Company |
| 05-Oct-11 16:20 | RNS | Holding(s) in Company | Holding(s) in Company |
| 15-Sep-11 07:00 | RNS | Contract Win | Company Announcement - General |
| 07-Sep-11 07:00 | RNS | Biofuels Agreement | Company Announcement - General |
| 02-Sep-11 09:31 | RNS | Director/PDMR Shareholding | Directors' Dealings |
| 31-Aug-11 11:15 | RNS | Holding(s) in Company | Holding(s) in Company |
| 31-Aug-11 11:13 | RNS | Holding(s) in Company | Holding(s) in Company |
| 04-Aug-11 16:40 | RNS | Second Price Monitoring Extn | Company Announcement - General |
| 04-Aug-11 16:35 | RNS | Price Monitoring Extension | Company Announcement - General |
| 04-Aug-11 16:03 | RNS | Statement re share price movement | Company Announcement - General |
| 01-Aug-11 13:41 | RNS | Exercise of Options | Company Announcement - General |
| 29-Jul-11 07:00 | RNS | Future Biogas Trial | Company Announcement - General |
| 27-Jul-11 13:32 | RNS | Exercise of Options | Company Announcement - General |
| 20-Jul-11 07:00 | RNS | Joint Venture with Biomimetics | Company Announcement - General |
| 14-Jul-11 12:34 | RNS | Holding(s) in Company | Holding(s) in Company |
| 12-Jul-11 12:33 | RNS | Exercise of Options | Company Announcement - General |