| 15/02/21 | 14:47:48 | 15 Feb 2021 | | Change of Registered Office | RNS |
| 11/02/21 | 07:00:03 | 11 Feb 2021 | | Trading and Reserves Update | RNS |
| 05/02/21 | 16:41:13 | 5 Feb 2021 | | Second Price Monitoring Extn | RNS |
| 05/02/21 | 16:35:54 | 5 Feb 2021 | | Price Monitoring Extension | RNS |
| 04/02/21 | 16:36:16 | 4 Feb 2021 | | Price Monitoring Extension | RNS |
| 01/02/21 | 07:00:09 | 1 Feb 2021 | | Total Voting Rights | RNS |
| 28/01/21 | 10:12:59 | 28 Jan 2021 | | Additional Listing Director/PDMR Shareholding | RNS |
| 19/01/21 | 17:09:31 | 19 Jan 2021 | | Holding(s) in Company | RNS |
| 04/01/21 | 07:01:05 | 4 Jan 2021 | | Total Voting Rights | RNS |
| 04/01/21 | 07:00:10 | 4 Jan 2021 | | Business Update | RNS |
| 21/12/20 | 07:00:07 | 21 Dec 2020 | | Grant of awards under the MRP | RNS |
| 18/12/20 | 09:35:01 | 18 Dec 2020 | | Block Listing Application | RNS |
| 30/11/20 | 16:39:35 | 30 Nov 2020 | | Total Voting Rights | RNS |
| 25/11/20 | 07:00:12 | 25 Nov 2020 | | Grant of Awards Under the MRP | RNS |
| 30/10/20 | 17:34:02 | 30 Oct 2020 | | Total Voting Rights | RNS |
| 27/10/20 | 07:00:08 | 27 Oct 2020 | | Additional Listing Director/PDMR Shareholding | RNS |
| 26/10/20 | 07:00:07 | 26 Oct 2020 | | MoU with BayoTech for Hydrogen Development | RNS |
| 23/10/20 | 07:00:05 | 23 Oct 2020 | | Grant of Awards Under the MRP | RNS |
| 05/10/20 | 17:35:03 | 5 Oct 2020 | | Total Voting Rights | RNS |
| 25/09/20 | 12:41:38 | 25 Sept 2020 | | Grant of Awards Under the MRP | RNS |
| 25/09/20 | 10:46:47 | 25 Sept 2020 | | Additional Listing | RNS |
| 22/09/20 | 07:00:06 | 22 Sept 2020 | | Interim Results | RNS |
| 16/09/20 | 07:35:25 | 16 Sept 2020 | | Additional Listing and Acquisition | RNS |
| 16/09/20 | 07:00:06 | 16 Sept 2020 | | IGas Acquires Geothermal Energy Business | RNS |
| 01/09/20 | 07:00:09 | 1 Sept 2020 | | Total Voting Rights | RNS |
| 26/08/20 | 15:48:14 | 26 Aug 2020 | | Grant of Awards Under the MRP | RNS |
| 14/08/20 | 12:48:18 | 14 Aug 2020 | | Replacement - Director/PDMR Shareholding | RNS |
| 30/07/20 | 07:00:11 | 30 Jul 2020 | | Additional Listing Director/PDMR Shareholding | RNS |
| 24/07/20 | 07:00:04 | 24 Jul 2020 | | Grant of Awards Under the MRP | RNS |
| 23/07/20 | 07:00:06 | 23 Jul 2020 | | Waterflood Projects Update | RNS |
| 16/07/20 | 07:00:04 | 16 Jul 2020 | | Additional Listing | RNS |
| 10/07/20 | 16:35:47 | 10 Jul 2020 | | Price Monitoring Extension | RNS |
| 09/07/20 | 16:40:49 | 9 Jul 2020 | | Second Price Monitoring Extn | RNS |
| 09/07/20 | 16:35:58 | 9 Jul 2020 | | Price Monitoring Extension | RNS |
| 08/07/20 | 16:41:23 | 8 Jul 2020 | | Second Price Monitoring Extn | RNS |
| 08/07/20 | 16:36:12 | 8 Jul 2020 | | Price Monitoring Extension | RNS |
| 07/07/20 | 16:41:11 | 7 Jul 2020 | | Second Price Monitoring Extn | RNS |
| 07/07/20 | 16:35:53 | 7 Jul 2020 | | Price Monitoring Extension | RNS |
| 01/07/20 | 16:35:36 | 1 Jul 2020 | | Price Monitoring Extension | RNS |
| 29/06/20 | 16:36:18 | 29 Jun 2020 | | Price Monitoring Extension | RNS |
| 25/06/20 | 07:01:01 | 25 Jun 2020 | | Reorganisation of Finance Function | RNS |
| 25/06/20 | 07:00:05 | 25 Jun 2020 | | Operations and Cost Savings Update | RNS |
| 05/06/20 | 14:20:10 | 5 Jun 2020 | | Result of AGM | RNS |
| 05/06/20 | 07:00:02 | 5 Jun 2020 | | AGM Statement | RNS |
| 21/05/20 | 08:30:04 | 21 May 2020 | | AGM Update | RNS |
| 13/05/20 | 16:41:11 | 13 May 2020 | | Second Price Monitoring Extn | RNS |
| 13/05/20 | 16:35:45 | 13 May 2020 | | Price Monitoring Extension | RNS |
| 05/05/20 | 07:00:07 | 5 May 2020 | | Notice of AGM and Posting of Annual Report | RNS |
| 01/05/20 | 07:00:04 | 1 May 2020 | | Operations Update | RNS |
| 30/04/20 | 12:29:07 | 30 Apr 2020 | | Additional Listing Director/PDMR Shareholding | RNS |
