| 30/04/20 | 14:51:17 | 30 Apr 2020 | | Disclosure of Rights Attached to Equity Shares | RNS |
| 30/04/20 | 14:49:32 | 30 Apr 2020 | | Result of AGM | RNS |
| 30/04/20 | 07:00:06 | 30 Apr 2020 | | AGM trading statement & Covid-19 update | RNS |
| 21/04/20 | 09:00:17 | 21 Apr 2020 | | Holding(s) in Company | RNS |
| 15/04/20 | 07:00:08 | 15 Apr 2020 | | Holding(s) in Company | RNS |
| 14/04/20 | 10:20:09 | 14 Apr 2020 | | Director/PDMR Shareholding | RNS |
| 01/04/20 | 17:35:47 | 1 Apr 2020 | | Price Monitoring Extension | RNS |
| 31/03/20 | 18:15:05 | 31 Mar 2020 | | Total Voting Rights and Share Capital | RNS |
| 31/03/20 | 08:00:06 | 31 Mar 2020 | | Annual General Meeting and COVID-19 | RNS |
| 30/03/20 | 13:08:32 | 30 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 30/03/20 | 13:03:05 | 30 Mar 2020 | | Price Monitoring Extension | RNS |
| 26/03/20 | 07:00:02 | 26 Mar 2020 | | Covid-19 Update | RNS |
| 20/03/20 | 17:30:06 | 20 Mar 2020 | | Annual Report and Accounts posted | RNS |
| 20/03/20 | 16:45:44 | 20 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 20/03/20 | 10:20:52 | 20 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 20/03/20 | 10:16:12 | 20 Mar 2020 | | Price Monitoring Extension | RNS |
| 20/03/20 | 07:00:06 | 20 Mar 2020 | | Directorate Change | RNS |
| 18/03/20 | 12:02:43 | 18 Mar 2020 | | Price Monitoring Extension | RNS |
| 18/03/20 | 10:21:15 | 18 Mar 2020 | | Final dividend payment date | RNS |
| 17/03/20 | 15:57:49 | 17 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 16/03/20 | 12:07:40 | 16 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 16/03/20 | 12:02:29 | 16 Mar 2020 | | Price Monitoring Extension | RNS |
| 27/02/20 | 16:41:21 | 27 Feb 2020 | | Second Price Monitoring Extn | RNS |
| 27/02/20 | 16:36:01 | 27 Feb 2020 | | Price Monitoring Extension | RNS |
| 27/02/20 | 07:00:10 | 27 Feb 2020 | | Final Results for the year ended 31 December 2019 | RNS |
| 21/02/20 | 07:00:03 | 21 Feb 2020 | | Four year contract extension worth £35m | RNS |
| 13/02/20 | 12:51:57 | 13 Feb 2020 | | Director Shareholding Update | RNS |
| 16/01/20 | 15:40:01 | 16 Jan 2020 | | BLOCK LISTING SIX MONTHLY RETURN | RNS |
| 09/01/20 | 12:07:36 | 9 Jan 2020 | | Second Price Monitoring Extn | RNS |
| 09/01/20 | 12:02:30 | 9 Jan 2020 | | Price Monitoring Extension | RNS |
| 09/01/20 | 11:06:22 | 9 Jan 2020 | | Director/PDMR Shareholding | RNS |
| 02/01/20 | 11:19:17 | 2 Jan 2020 | | Total Voting Rights | RNS |
| 06/12/19 | 09:35:27 | 6 Dec 2019 | | Total Voting Rights and Share Capital | RNS |
| 28/11/19 | 07:00:06 | 28 Nov 2019 | | Trading Update | RNS |
| 05/11/19 | 13:29:01 | 5 Nov 2019 | | Notice of cyber security incident | RNS |
| 02/10/19 | 12:39:19 | 2 Oct 2019 | | Total Voting Rights and Share Capital | RNS |
| 01/10/19 | 08:00:16 | 1 Oct 2019 | | CONFIRMATION OF APPOINTMENT OF CEO | RNS |
| 27/09/19 | 08:00:03 | 27 Sept 2019 | | Submarine Rescue System contract | RNS |
| 04/09/19 | 15:38:24 | 4 Sept 2019 | | Total Voting Rights | RNS |
| 28/08/19 | 08:00:03 | 28 Aug 2019 | | Half year results | RNS |
| 07/08/19 | 08:00:03 | 7 Aug 2019 | | Acquisition of SM Continental S.A. | RNS |
| 16/07/19 | 08:00:03 | 16 Jul 2019 | | Contract Wins | RNS |
| 05/07/19 | 08:00:04 | 5 Jul 2019 | | Appointment of new Chief Executive Officer | RNS |
| 01/07/19 | 10:49:36 | 1 Jul 2019 | | Total Voting Rights | RNS |
| 19/06/19 | 12:13:01 | 19 Jun 2019 | | BLOCK LISTING SIX MONTHLY RETURN | RNS |
| 10/06/19 | 08:00:05 | 10 Jun 2019 | | Additional Listing | RNS |
| 02/05/19 | 17:20:08 | 2 May 2019 | | Result of AGM | RNS |
| 02/05/19 | 08:00:03 | 2 May 2019 | | Trading Update & AGM Statement | RNS |
| 26/04/19 | 14:59:34 | 26 Apr 2019 | | Director/PDMR Shareholding | RNS |
| 18/04/19 | 14:07:16 | 18 Apr 2019 | | Director/PDMR Shareholding | RNS |
