| 01/03/21 | 07:00:08 | 1 Mar 2021 | | Acquisition of Digital Imaging Specialist | RNS |
| 22/02/21 | 07:00:06 | 22 Feb 2021 | | Trading Update | RNS |
| 05/01/21 | 07:00:04 | 5 Jan 2021 | | Steatite secures £2.2m transport sector order | RNS |
| 08/12/20 | 07:00:03 | 8 Dec 2020 | | Interim Results & Investor Presentation | RNS |
| 18/11/20 | 07:00:09 | 18 Nov 2020 | | Board Changes | RNS |
| 10/11/20 | 07:00:08 | 10 Nov 2020 | | Innovate UK funding for zero-emissions powertrain | RNS |
| 30/10/20 | 07:00:06 | 30 Oct 2020 | | LTIP Share Option Award | RNS |
| 20/10/20 | 07:00:05 | 20 Oct 2020 | | Trading Update, Notice of Results & Investor Pres | RNS |
| 13/10/20 | 15:34:06 | 13 Oct 2020 | | Transaction in Own Shares | RNS |
| 09/10/20 | 17:20:39 | 9 Oct 2020 | | Purchase of own shares | RNS |
| 05/10/20 | 07:00:07 | 5 Oct 2020 | | Over $4m Optoelectronics Contract | RNS |
| 09/09/20 | 10:30:02 | 9 Sept 2020 | | Result of AGM | RNS |
| 11/08/20 | 07:00:06 | 11 Aug 2020 | | Trading & COVID-19 Update | RNS |
| 02/07/20 | 07:00:04 | 2 Jul 2020 | | Director/PDMR Shareholding | RNS |
| 01/07/20 | 09:43:51 | 1 Jul 2020 | | Director/PDMR Shareholding | RNS |
| 30/06/20 | 07:00:05 | 30 Jun 2020 | | Final Results | RNS |
| 08/06/20 | 07:00:06 | 8 Jun 2020 | | Trading and COVID-19 Update & Notice of Results | RNS |
| 15/04/20 | 07:00:05 | 15 Apr 2020 | | Trading Update & COVID-19 Update | RNS |
| 31/03/20 | 16:56:19 | 31 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 30/03/20 | 08:00:08 | 30 Mar 2020 | | Board Changes, COVID Update & Notice of TU | RNS |
| 24/03/20 | 07:00:04 | 24 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 20/03/20 | 17:21:10 | 20 Mar 2020 | | Holding(s) in Company | RNS |
| 20/03/20 | 14:31:51 | 20 Mar 2020 | | Director/PDMR Shareholding | RNS |
| 20/03/20 | 11:06:13 | 20 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 20/03/20 | 11:00:49 | 20 Mar 2020 | | Price Monitoring Extension | RNS |
| 03/03/20 | 10:44:13 | 3 Mar 2020 | | Holding(s) in Company | RNS |
| 21/02/20 | 10:22:44 | 21 Feb 2020 | | Holding(s) in Company | RNS |
| 07/02/20 | 07:00:02 | 7 Feb 2020 | | Treasury Shares & TVR | RNS |
| 16/01/20 | 13:03:02 | 16 Jan 2020 | | Director/PDMR Shareholding | RNS |
| 13/01/20 | 15:50:02 | 13 Jan 2020 | | Exercise of Options | RNS |
| 03/12/19 | 07:00:05 | 3 Dec 2019 | | Half-year Report | RNS |
| 25/10/19 | 11:46:00 | 25 Oct 2019 | | Holding(s) in Company | RNS |
| 24/10/19 | 08:00:04 | 24 Oct 2019 | | Trading Statement & Notice of Results | RNS |
| 30/09/19 | 08:00:27 | 30 Sept 2019 | | $3m US Rail Infrastructure Contract | RNS |
| 04/09/19 | 14:45:28 | 4 Sept 2019 | | Result of AGM | RNS |
| 03/09/19 | 08:00:04 | 3 Sept 2019 | | Trading Update | RNS |
| 03/07/19 | 13:17:46 | 3 Jul 2019 | | Holding(s) in Company | RNS |
| 02/07/19 | 08:00:06 | 2 Jul 2019 | | Final Results | RNS |
| 27/06/19 | 08:00:15 | 27 Jun 2019 | | Board Changes | RNS |
| 26/06/19 | 08:00:07 | 26 Jun 2019 | | Microchip franchise extension | RNS |
| 25/06/19 | 17:54:44 | 25 Jun 2019 | | Holding(s) in Company | RNS |
| 03/06/19 | 18:36:23 | 3 Jun 2019 | | Holding(s) in Company | RNS |
| 30/04/19 | 17:00:01 | 30 Apr 2019 | | Holding(s) in Company | RNS |
| 30/04/19 | 08:00:09 | 30 Apr 2019 | | Trading Update & Notice of Results | RNS |
| 04/04/19 | 12:38:20 | 4 Apr 2019 | | Holding(s) in Company | RNS |
| 29/03/19 | 15:02:41 | 29 Mar 2019 | | Holding(s) in Company | RNS |
| 28/03/19 | 18:00:36 | 28 Mar 2019 | | Holding(s) in Company | RNS |
| 28/03/19 | 11:35:55 | 28 Mar 2019 | | Director/PDMR Shareholding | RNS |
| 22/03/19 | 07:00:02 | 22 Mar 2019 | | Total Voting Rights and Tansaction in own shares | RNS |
| 04/03/19 | 15:19:23 | 4 Mar 2019 | | Directorate Change | RNS |
