| 03/06/14 | 17:15:22 | 3 Jun 2014 | | Director/PDMR Shareholding | RNS |
| 23/05/14 | 16:20:27 | 23 May 2014 | | Exercise of options | RNS |
| 22/05/14 | 08:00:11 | 22 May 2014 | | Payment of deferred consideration for Scientifica | RNS |
| 19/05/14 | 16:08:22 | 19 May 2014 | | Exercise of options | RNS |
| 12/05/14 | 14:54:45 | 12 May 2014 | | Director/PDMR Shareholding | RNS |
| 24/04/14 | 18:30:47 | 24 Apr 2014 | | Exercise of Options | RNS |
| 10/04/14 | 13:01:09 | 10 Apr 2014 | | Exercise of options | RNS |
| 08/04/14 | 19:15:13 | 8 Apr 2014 | | Director/PDMR Shareholding | RNS |
| 04/04/14 | 15:28:11 | 4 Apr 2014 | | Exercise of Options | RNS |
| 28/03/14 | 07:00:50 | 28 Mar 2014 | | Final Results | RNS |
| 10/03/14 | 10:00:06 | 10 Mar 2014 | | Notice of Results | RNS |
| 10/03/14 | 08:51:39 | 10 Mar 2014 | | Director/PDMR Shareholding | RNS |
| 07/02/14 | 14:53:57 | 7 Feb 2014 | | Director/PDMR Shareholding | RNS |
| 24/01/14 | 07:00:06 | 24 Jan 2014 | | Trading Statement | RNS |
| 22/01/14 | 14:01:10 | 22 Jan 2014 | | Exercise of Options | RNS |
| 13/01/14 | 13:40:30 | 13 Jan 2014 | | Holding(s) in Company | RNS |
| 10/01/14 | 18:00:03 | 10 Jan 2014 | | Holding(s) in Company | RNS |
| 09/01/14 | 16:34:51 | 9 Jan 2014 | | Director/PDMR Shareholding | RNS |
| 13/12/13 | 10:31:07 | 13 Dec 2013 | | Issue of Equity | RNS |
| 10/12/13 | 08:39:32 | 10 Dec 2013 | | Director/PDMR Shareholding | RNS |
| 04/12/13 | 16:06:31 | 4 Dec 2013 | | Issue of Equity | RNS |
| 26/11/13 | 15:31:43 | 26 Nov 2013 | | Director/PDMR Shareholding | RNS |
| 20/11/13 | 07:00:07 | 20 Nov 2013 | | Trading Statement | RNS |
| 07/11/13 | 14:04:18 | 7 Nov 2013 | | Director/PDMR Shareholding | RNS |
| 25/10/13 | 18:24:30 | 25 Oct 2013 | | Holding(s) in Company | RNS |
| 25/10/13 | 17:19:42 | 25 Oct 2013 | | Director/PDMR Shareholding | RNS |
| 21/10/13 | 08:00:06 | 21 Oct 2013 | | Placing to raise GBP8.125 million | RNS |
| 09/10/13 | 14:25:22 | 9 Oct 2013 | | Director/PDMR Shareholding | RNS |
| 02/10/13 | 18:47:56 | 2 Oct 2013 | | Holding(s) in Company | RNS |
| 26/09/13 | 08:00:07 | 26 Sept 2013 | | Half Yearly Report | RNS |
| 17/09/13 | 17:17:29 | 17 Sept 2013 | | Notice of Results | RNS |
| 09/09/13 | 17:15:02 | 9 Sept 2013 | | Director/PDMR Shareholding | RNS |
| 13/08/13 | 13:48:13 | 13 Aug 2013 | | Holding(s) in Company | RNS |
| 06/08/13 | 17:33:58 | 6 Aug 2013 | | Director/PDMR Shareholding | RNS |
| 18/07/13 | 15:04:40 | 18 Jul 2013 | | Director/PDMR Shareholding | RNS |
| 18/07/13 | 08:00:05 | 18 Jul 2013 | | Trading Statement | RNS |
| 15/07/13 | 17:59:32 | 15 Jul 2013 | | Exercise of Options | RNS |
| 10/07/13 | 14:27:49 | 10 Jul 2013 | | Exercise of options | RNS |
| 09/07/13 | 08:00:10 | 9 Jul 2013 | | Director/PDMR Shareholding and Issue of Equity | RNS |
| 27/06/13 | 17:52:12 | 27 Jun 2013 | | Holding(s) in Company | RNS |
| 27/06/13 | 08:00:10 | 27 Jun 2013 | | Acquisition and Trading Update | RNS |
| 07/06/13 | 16:24:11 | 7 Jun 2013 | | Director/PDMR Shareholding | RNS |
| 29/05/13 | 18:17:18 | 29 May 2013 | | Result of AGM | RNS |
| 10/05/13 | 17:06:16 | 10 May 2013 | | Director/PDMR Shareholding | RNS |
| 12/04/13 | 16:30:02 | 12 Apr 2013 | | Issue of Equity | RNS |
| 09/04/13 | 12:59:34 | 9 Apr 2013 | | Director/PDMR Shareholding | RNS |
| 22/03/13 | 07:00:08 | 22 Mar 2013 | | Final Results | RNS |
| 08/03/13 | 11:30:02 | 8 Mar 2013 | | Notice of Results | RNS |
| 07/03/13 | 14:41:17 | 7 Mar 2013 | | Director/PDMR Shareholding | RNS |
| 08/02/13 | 15:54:38 | 8 Feb 2013 | | Director/PDMR Shareholding | RNS |