| 21/03/24 | 07:00:14 | 21 Mar 2024 | | Director Dealing |
| 18/03/24 | 07:00:07 | 18 Mar 2024 | | Grant of Share Options to Chief Financial Officer |
| 04/03/24 | 07:00:05 | 4 Mar 2024 | | Saudi Arabia Business Operation Sale Completion |
| 22/02/24 | 07:02:00 | 22 Feb 2024 | | Trading Update |
| 22/02/24 | 07:00:08 | 22 Feb 2024 | | Saudi Arabia Business Operation Sale |
| 21/11/23 | 07:00:09 | 21 Nov 2023 | | Contract Update |
| 16/11/23 | 07:00:10 | 16 Nov 2023 | | Trading Update |
| 26/09/23 | 15:10:01 | 26 Sept 2023 | | Result of Annual Meeting |
| 20/09/23 | 07:00:05 | 20 Sept 2023 | | Half Year Results Statement |
| 11/07/23 | 07:00:05 | 11 Jul 2023 | | Contract Award |
| 05/07/23 | 15:28:30 | 5 Jul 2023 | | Holding(s) in Company |
| 03/07/23 | 14:37:04 | 3 Jul 2023 | | Contract Award & PFAS Update |
| 21/06/23 | 07:00:03 | 21 Jun 2023 | | Mailing of AR and Notice of 2023 Annual Meeting |
| 18/05/23 | 07:00:05 | 18 May 2023 | | Final Results for the Year Ending 31 December 2022 |
| 12/05/23 | 07:00:06 | 12 May 2023 | | Holding(s) in Company |
| 17/04/23 | 07:00:07 | 17 Apr 2023 | | Successful leach testing of PFAS media |
| 14/03/23 | 16:50:01 | 14 Mar 2023 | | Closure of Restricted Stock Line |
| 08/03/23 | 07:00:06 | 8 Mar 2023 | | Pilot Testing Agreement for PFAS Remediation |
| 13/02/23 | 07:00:05 | 13 Feb 2023 | | Operational Update |
| 31/01/23 | 07:00:06 | 31 Jan 2023 | | Trading Update |
| 24/01/23 | 07:00:06 | 24 Jan 2023 | | Contract Secured for PFAS Remediation System |
| 08/12/22 | 07:00:06 | 8 Dec 2022 | | Trading Update |
| 27/09/22 | 07:00:09 | 27 Sept 2022 | | Half Year Results Statement |
| 15/09/22 | 07:00:13 | 15 Sept 2022 | | Trading Update |
| 06/09/22 | 14:30:25 | 6 Sept 2022 | | Holding(s) in Company |
| 30/08/22 | 07:00:13 | 30 Aug 2022 | | New Project Awards and Operations Update |
| 13/07/22 | 15:32:49 | 13 Jul 2022 | | Result of Annual Meeting |
| 13/06/22 | 07:00:03 | 13 Jun 2022 | | 2021 Annual Report & Notice of 2022 Annual Meeting |
| 17/05/22 | 07:00:09 | 17 May 2022 | | Final Results for Year Ending 31 December 2021 |
| 03/05/22 | 07:00:14 | 3 May 2022 | | Director/PDMR Shareholding |
| 03/05/22 | 07:00:13 | 3 May 2022 | | Change of Main Office Address |
| 23/03/22 | 09:17:37 | 23 Mar 2022 | | TR1 |
| 21/03/22 | 17:56:29 | 21 Mar 2022 | | Broker Option |
| 16/03/22 | 16:09:24 | 16 Mar 2022 | | Holding(s) in Company |
| 11/03/22 | 13:10:02 | 11 Mar 2022 | | Dealings by Directors |
| 11/03/22 | 07:00:04 | 11 Mar 2022 | | Proposed Placing and Subscription |
| 11/02/22 | 07:00:03 | 11 Feb 2022 | | Trading Update |
| 02/02/22 | 11:07:01 | 2 Feb 2022 | | Holding(s) in Company |
| 25/01/22 | 07:00:06 | 25 Jan 2022 | | Successful Trial of PFAS Remediation System |
| 10/01/22 | 07:00:10 | 10 Jan 2022 | | Award of Green Economy Mark |
| 23/11/21 | 14:36:12 | 23 Nov 2021 | | Holding(s) in Company |
| 11/11/21 | 11:51:46 | 11 Nov 2021 | | Dealings by Directors |
| 09/11/21 | 16:42:04 | 9 Nov 2021 | | Director/PDMR Shareholding |
| 05/11/21 | 07:00:02 | 5 Nov 2021 | | Director/PDMR Shareholding |
| 28/10/21 | 16:34:55 | 28 Oct 2021 | | Holding(s) in Company |
| 14/10/21 | 07:00:03 | 14 Oct 2021 | | Middle East Contract Win |
| 29/09/21 | 07:00:08 | 29 Sept 2021 | | Half Year Results Statement |
| 31/08/21 | 07:00:10 | 31 Aug 2021 | | Notice of Interim Results & Investor Presentation |
