| 10/04/19 | 17:32:08 | 10 Apr 2019 | | Notification of Directors' Interest in Shares | RNS |
| 10/04/19 | 17:30:35 | 10 Apr 2019 | | Notification of Directors' Interest in Shares | RNS |
| 10/04/19 | 17:28:43 | 10 Apr 2019 | | Notification of Directors' Interest in Shares | RNS |
| 10/04/19 | 17:25:48 | 10 Apr 2019 | | Notification of Directors' Interest in Shares | RNS |
| 25/03/19 | 14:21:00 | 25 Mar 2019 | | Annual Report & Accounts | RNS |
| 22/03/19 | 16:35:22 | 22 Mar 2019 | | Appointment of Senior Independent Director | RNS |
| 20/03/19 | 11:47:17 | 20 Mar 2019 | | Holding(s) in Company | RNS |
| 18/03/19 | 10:58:26 | 18 Mar 2019 | | Director/PDMR Shareholding | RNS |
| 18/03/19 | 09:37:01 | 18 Mar 2019 | | Director/PDMR Shareholding | RNS |
| 26/02/19 | 10:00:01 | 26 Feb 2019 | | Directorate Change | RNS |
| 26/02/19 | 07:00:18 | 26 Feb 2019 | | Preliminary Results | RNS |
| 08/01/19 | 07:00:03 | 8 Jan 2019 | | ACQUISITIONS OF MARTEK AND MSMC | RNS |
| 19/12/18 | 07:00:03 | 19 Dec 2018 | | BLOCK LISTING SIX MONTHLY RETURN | RNS |
| 19/12/18 | 07:00:02 | 19 Dec 2018 | | £30m Submarine Rescue System contract | RNS |
| 04/12/18 | 07:00:19 | 4 Dec 2018 | | Retirement of Chief Executive Officer | RNS |
| 23/11/18 | 07:00:02 | 23 Nov 2018 | | Trading Update | RNS |
| 07/11/18 | 16:32:22 | 7 Nov 2018 | | Holding(s) in Company | RNS |
| 29/08/18 | 08:00:05 | 29 Aug 2018 | | Half-year Results | RNS |
| 15/06/18 | 11:00:02 | 15 Jun 2018 | | Block Listing Six Montly Return | RNS |
| 04/05/18 | 16:00:01 | 4 May 2018 | | CORRECTION: Directors' Interest in Shares | RNS |
| 03/05/18 | 16:39:07 | 3 May 2018 | | Result of AGM | RNS |
| 03/05/18 | 08:00:02 | 3 May 2018 | | Trading Update & AGM Statement | RNS |
| 01/05/18 | 08:00:03 | 1 May 2018 | | Total Voting Rights | RNS |
| 10/04/18 | 15:07:43 | 10 Apr 2018 | | Notification of Directors' Interest in Shares | RNS |
| 10/04/18 | 08:00:03 | 10 Apr 2018 | | 10 year, £50m Integrated Marine Services Contract | RNS |
| 05/04/18 | 16:55:47 | 5 Apr 2018 | | Director/PDMR Shareholding | RNS |
| 05/04/18 | 16:54:27 | 5 Apr 2018 | | Director/PDMR Shareholding | RNS |
| 04/04/18 | 10:39:51 | 4 Apr 2018 | | Total Voting Rights and Share Capital | RNS |
| 09/03/18 | 10:18:34 | 9 Mar 2018 | | Director/PDMR Shareholding | RNS |
| 02/03/18 | 15:40:00 | 2 Mar 2018 | | Director/PDMR Shareholding | RNS |
| 02/03/18 | 07:00:05 | 2 Mar 2018 | | Director/PDMR Shareholding | RNS |
| 28/02/18 | 07:00:09 | 28 Feb 2018 | | NEW DIRECTOR APPOINTMENT | RNS |
| 27/02/18 | 07:00:07 | 27 Feb 2018 | | Preliminary results year ended 31 December 2017 | RNS |
| 19/02/18 | 07:00:02 | 19 Feb 2018 | | Acquisition of Cowan Manufacturing PTY Limited | RNS |
| 18/01/18 | 07:00:09 | 18 Jan 2018 | | Board Changes | RNS |
| 15/12/17 | 10:57:42 | 15 Dec 2017 | | Block listing Interim Review | RNS |
| 07/12/17 | 16:57:18 | 7 Dec 2017 | | Director/PDMR Shareholding | RNS |
| 06/12/17 | 07:00:05 | 6 Dec 2017 | | ACQUISITION OF EDS HV GROUP LIMITED | RNS |
| 24/11/17 | 07:00:03 | 24 Nov 2017 | | Trading Update | RNS |
| 14/09/17 | 17:35:16 | 14 Sept 2017 | | Price Monitoring Extension | RNS |
| 30/08/17 | 08:00:02 | 30 Aug 2017 | | Half Year Results 2017 | RNS |
| 25/08/17 | 12:08:14 | 25 Aug 2017 | | Holding(s) in Company | RNS |
| 03/07/17 | 08:59:59 | 3 Jul 2017 | | Total Voting Rights and Share Capital | RNS |
| 16/06/17 | 12:11:54 | 16 Jun 2017 | | BLOCK LISTING SIX MONTHLY RETURN | RNS |
| 12/06/17 | 16:19:42 | 12 Jun 2017 | | Director/PDMR Shareholding | RNS |
| 07/06/17 | 14:20:05 | 7 Jun 2017 | | Director/PDMR Shareholding | RNS |
| 05/06/17 | 16:39:59 | 5 Jun 2017 | | Director/PDMR Shareholding | RNS |
| 05/05/17 | 12:41:29 | 5 May 2017 | | Results of AGM | RNS |
| 04/05/17 | 08:00:07 | 4 May 2017 | | Trading Update & AGM Statement | RNS |
| 02/05/17 | 13:51:04 | 2 May 2017 | | Total Voting Rights and Share Capital | RNS |
