| Change of Nominated Adviser and Broker | 02-Jan-2018 | 07:00 | RNS |
| Grant of Options | 12-Dec-2017 | 07:00 | RNS |
| Holding(s) in Company | 06-Dec-2017 | 16:02 | RNS |
| Trading Statement | 02-Nov-2017 | 07:00 | RNS |
| Director/PDMR Shareholding | 23-Oct-2017 | 16:16 | RNS |
| Disposal of Sheen Instruments | 20-Oct-2017 | 07:00 | RNS |
| Holding(s) in Company | 16-Oct-2017 | 12:25 | RNS |
| Holding(s) in Company | 27-Sep-2017 | 16:20 | RNS |
| Half-year Report | 21-Sep-2017 | 07:00 | RNS |
| Contract Win | 19-Sep-2017 | 07:00 | RNS |
| Trading Update and Notification of Interim Results | 10-Aug-2017 | 07:00 | RNS |
| Disposal | 31-Jul-2017 | 07:00 | RNS |
| Holding(s) in Company | 13-Jul-2017 | 10:01 | RNS |
| Result of AGM | 06-Jul-2017 | 15:00 | RNS |
| AGM Statement | 06-Jul-2017 | 07:00 | RNS |