| 15/10/20 | 07:00:02 | 15 Oct 2020 | | Transaction in Own Shares | RNS |
| 14/10/20 | 07:00:06 | 14 Oct 2020 | | Transaction in Own Shares | RNS |
| 13/10/20 | 07:00:02 | 13 Oct 2020 | | Transaction in Own Shares | RNS |
| 12/10/20 | 07:00:07 | 12 Oct 2020 | | Transaction in Own Shares | RNS |
| 09/10/20 | 07:00:02 | 9 Oct 2020 | | Transaction in Own Shares | RNS |
| 08/10/20 | 07:00:18 | 8 Oct 2020 | | Transaction in Own Shares | RNS |
| 07/10/20 | 07:00:05 | 7 Oct 2020 | | Transaction in Own Shares | RNS |
| 06/10/20 | 07:03:34 | 6 Oct 2020 | | Transaction in Own Shares | RNS |
| 05/10/20 | 07:00:06 | 5 Oct 2020 | | Transaction in Own Shares | RNS |
| 02/10/20 | 07:00:02 | 2 Oct 2020 | | Transaction in Own Shares | RNS |
| 01/10/20 | 07:00:06 | 1 Oct 2020 | | Transaction in Own Shares | RNS |
| 30/09/20 | 07:00:03 | 30 Sept 2020 | | Transaction in Own Shares | RNS |
| 29/09/20 | 07:00:02 | 29 Sept 2020 | | Transaction in Own Shares | RNS |
| 28/09/20 | 07:00:07 | 28 Sept 2020 | | Transaction in Own Shares | RNS |
| 25/09/20 | 07:00:02 | 25 Sept 2020 | | Announcement of £5m share buyback programme | RNS |
| 23/09/20 | 07:00:07 | 23 Sept 2020 | | Dividend Timetable | RNS |
| 02/09/20 | 07:00:03 | 2 Sept 2020 | | Director Share Dealings in Company | RNS |
| 27/08/20 | 07:00:06 | 27 Aug 2020 | | Interim results for six months ended 30 June 2020 | RNS |
| 27/07/20 | 07:00:09 | 27 Jul 2020 | | Director Share Dealings in Company | RNS |
| 24/07/20 | 07:00:03 | 24 Jul 2020 | | Half Year 2020 Trading Update | RNS |
| 03/06/20 | 07:00:03 | 3 Jun 2020 | | Director Share Dealings in Company | RNS |
| 02/06/20 | 07:00:04 | 2 Jun 2020 | | Directors, PDMR and PCA Share Dealings in Company | RNS |
| 27/05/20 | 16:43:10 | 27 May 2020 | | Results of 2020 Annual General Meeting | RNS |
| 22/05/20 | 11:53:15 | 22 May 2020 | | Director Share Dealings in Company | RNS |
| 15/05/20 | 07:00:04 | 15 May 2020 | | Issue of equity | RNS |
| 14/05/20 | 07:00:09 | 14 May 2020 | | Director Share Dealings in Company | RNS |
| 30/04/20 | 07:00:08 | 30 Apr 2020 | | Directors, PDMR and PCA Share Dealings in Company | RNS |
| 27/04/20 | 07:00:09 | 27 Apr 2020 | | Q1 2020 Trading Update | RNS |
| 15/04/20 | 07:00:08 | 15 Apr 2020 | | Notice of 2020 Annual General Meeting | RNS |
| 09/04/20 | 07:00:04 | 9 Apr 2020 | | Revision to Final Dividend Timetable and 2020 AGM | RNS |
| 07/04/20 | 07:00:04 | 7 Apr 2020 | | Results for the year ended 31 December 2019 | RNS |
| 26/03/20 | 12:07:34 | 26 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 26/03/20 | 12:02:29 | 26 Mar 2020 | | Price Monitoring Extension | RNS |
| 24/03/20 | 11:08:44 | 24 Mar 2020 | | FCA Moratorium on Company Financial Statements | RNS |
| 23/03/20 | 12:07:59 | 23 Mar 2020 | | Second Price Monitoring Extn | RNS |
| 23/03/20 | 12:02:53 | 23 Mar 2020 | | Price Monitoring Extension | RNS |
| 02/03/20 | 07:00:06 | 2 Mar 2020 | | US$20m financing for a calcium carbonate project | RNS |
| 25/02/20 | 07:00:07 | 25 Feb 2020 | | New Corporate Presentation and Market Update | RNS |
| 24/02/20 | 07:00:06 | 24 Feb 2020 | | Refinement of Portfolio Investment Strategy | RNS |
| 13/02/20 | 07:00:06 | 13 Feb 2020 | | Director Share Dealings in Company | RNS |
| 12/02/20 | 07:00:06 | 12 Feb 2020 | | Director Share Dealings in Company | RNS |
| 11/02/20 | 07:00:07 | 11 Feb 2020 | | 6-month warrant extension granted to Investec Bank | RNS |
| 30/01/20 | 07:00:04 | 30 Jan 2020 | | Deferred Bonus Plan & Directors Share Dealings | RNS |
| 29/01/20 | 07:00:04 | 29 Jan 2020 | | Extension of borrowing facility to US$90M + US$30M | RNS |
| 24/01/20 | 07:00:07 | 24 Jan 2020 | | Board Changes | RNS |
| 23/01/20 | 07:00:10 | 23 Jan 2020 | | Director Share Dealings in Company | RNS |
| 20/01/20 | 07:00:08 | 20 Jan 2020 | | 2019 Trading Update and Record Income for the year | RNS |
| 20/12/19 | 07:00:08 | 20 Dec 2019 | | Director Share Dealings in Company | RNS |
| 17/12/19 | 07:00:13 | 17 Dec 2019 | | Appointment of Executive Director | RNS |
| 12/12/19 | 07:00:20 | 12 Dec 2019 | | Dividend Timetable and 2020 AGM | RNS |