| Date | Source | Headline | |
|---|---|---|---|
| 20th Mar 2006 | 7:02 am | RNS | Centrica CHP programme |
| 20th Mar 2006 | 7:01 am | RNS | Interim Results |
| 17th Mar 2006 | 9:30 am | RNS | Blocklisting Interim Review |
| 13th Mar 2006 | 7:01 am | RNS | Key Technical Milestone |
| 10th Mar 2006 | 3:41 pm | RNS | Notice of Results |
| 6th Mar 2006 | 4:45 pm | RNS | Holding(s) in Company |
| 21st Feb 2006 | 10:26 am | RNS | Holding(s) in Company |
| 15th Feb 2006 | 5:34 pm | RNS | Holding(s) in Company |
| 27th Jan 2006 | 2:59 pm | RNS | Holding(s) in Company |
| 27th Jan 2006 | 2:56 pm | RNS | Holding(s) in Company |
| 26th Jan 2006 | 7:01 am | RNS | National energy role |
| 23rd Jan 2006 | 4:43 pm | RNS | Holding(s) in Company |
| 19th Jan 2006 | 7:01 am | RNS | Holding(s) in Company |
| 22nd Dec 2005 | 7:00 am | RNS | Blocklisting Interim Review |
| 12th Dec 2005 | 7:01 am | RNS | New contract award |
| 21st Nov 2005 | 2:56 pm | RNS | Result of AGM |
| 18th Oct 2005 | 7:00 am | RNS | Annual Report and Accounts |
| 30th Sep 2005 | 7:01 am | RNS | Final Results |
| 28th Sep 2005 | 7:04 am | RNS | Technical Milestone |
| 16th Sep 2005 | 7:00 am | RNS | Blocklisting Interim Review |
| 15th Sep 2005 | 7:00 am | RNS | Notice of Results |
| 13th Sep 2005 | 12:14 pm | RNS | Holding(s) in Company |
| 5th Sep 2005 | 7:01 am | RNS | Second BOC contract |
| 15th Aug 2005 | 7:00 am | RNS | British Gas agreement |
| 10th Aug 2005 | 11:25 am | RNS | Holding(s) in Company |
| 10th Aug 2005 | 11:23 am | RNS | Holding(s) in Company |
| 22nd Jun 2005 | 7:00 am | RNS | Additional Listing |
| 23rd May 2005 | 7:01 am | RNS | Size/cost breakthrough |
| 16th May 2005 | 7:01 am | RNS | Director Shareholding |
| 16th May 2005 | 7:00 am | RNS | Performance milestone |
| 14th Apr 2005 | 7:00 am | RNS | Holding(s) in Company |
| 6th Apr 2005 | 7:01 am | RNS | Major technology award |
| 15th Mar 2005 | 4:28 pm | RNS | Block Listing Application |
| 15th Mar 2005 | 7:00 am | RNS | Interim Results |
| 23rd Feb 2005 | 7:01 am | RNS | GBP1.9m Govt Contract Award |
| 21st Feb 2005 | 7:01 am | RNS | Re Agreement |
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