| 08/04/13 | 15:58:51 | 8 Apr 2013 | | Director/PDMR Shareholding | RNS |
| 03/04/13 | 08:45:03 | 3 Apr 2013 | | RESPONSE TO ENFORCEMENT NOTICE BY GEMA | RNS |
| 28/03/13 | 16:00:03 | 28 Mar 2013 | | Total Voting Rights | RNS |
| 28/03/13 | 14:18:46 | 28 Mar 2013 | | Director/PDMR Shareholding | RNS |
| 28/03/13 | 07:00:53 | 28 Mar 2013 | | Notification of Close Period | RNS |
| 25/03/13 | 12:01:39 | 25 Mar 2013 | | Director/PDMR Shareholding | RNS |
| 21/03/13 | 09:00:02 | 21 Mar 2013 | | Review of Thermal Generation Operations | RNS |
| 19/03/13 | 11:00:03 | 19 Mar 2013 | | Additional Listing | RNS |
| 06/03/13 | 09:06:44 | 6 Mar 2013 | | Notification of Director's Appointment | RNS |
| 04/03/13 | 12:30:03 | 4 Mar 2013 | | Director/PDMR Shareholding | RNS |
| 28/02/13 | 15:55:31 | 28 Feb 2013 | | Block Listing Six Monthly Return | RNS |
| 28/02/13 | 15:43:30 | 28 Feb 2013 | | Total Voting Rights | RNS |
| 26/02/13 | 16:23:56 | 26 Feb 2013 | | Scrip Alternative | RNS |
| 18/02/13 | 14:54:24 | 18 Feb 2013 | | Notification of Director's Appointment | RNS |
| 07/02/13 | 14:14:31 | 7 Feb 2013 | | Director/PDMR Shareholding | RNS |
| 06/02/13 | 11:13:41 | 6 Feb 2013 | | Notification of Directors Appointment | RNS |
| 06/02/13 | 07:00:09 | 6 Feb 2013 | | Sale of wind farm capacity | RNS |
| 31/01/13 | 10:06:21 | 31 Jan 2013 | | Total Voting Rights | RNS |
| 31/01/13 | 07:00:07 | 31 Jan 2013 | | Interim Management Statement | RNS |
| 30/01/13 | 15:37:25 | 30 Jan 2013 | | SCRIP DIVIDEND REFERENCE PRICE | RNS |
| 23/01/13 | 12:02:01 | 23 Jan 2013 | | Executive Directors | RNS |
| 11/01/13 | 10:00:02 | 11 Jan 2013 | | Gas Distribution Price Control | RNS |
| 08/01/13 | 15:45:17 | 8 Jan 2013 | | Director/PDMR Shareholding | RNS |
