| Allan David Scorey | Director | 15 Sept 2014 | 25 Jul 2015 | British | 60 years |
| Bernard Denis Maurice Tabary | Director | 1 Feb 2011 | 10 Dec 2017 | French | 66 years |
| Carolyn Ferguson | Secretary | 10 Jun 2008 | 12 Aug 2024 | British | - |
| Charles Anthony Hodgson | Director | 6 Dec 2015 | 10 Dec 2017 | British | 47 years |
| Charles Stuart Horton | Director | 14 Sept 2014 | 10 Dec 2017 | British | 62 years |
| Christian Schreyer | Director | 5 Nov 2021 | 2 Feb 2023 | German | 58 years |
| Christopher Derek Dyne Burchell | Director | 10 Jun 2008 | 15 Aug 2014 | British | 53 years |
| David Allen Brown | Director | 1 Apr 2011 | 5 Nov 2021 | British | 66 years |
| Elodie Marie Francoise Brian | Director | 5 Jun 2019 | 27 Sept 2021 | French | 47 years |
| Gordon Alexander Boyd | Director | 28 Sept 2021 | 28 Mar 2022 | British | 66 years |
| James Charles Burt | Director | 8 Oct 2009 | 5 Apr 2014 | British | 65 years |
| Keith Down | Director | 7 Mar 2011 | 6 Dec 2015 | British | 61 years |
| Keith Lawrence Ludeman | Director | 10 Jun 2008 | 2 Jul 2011 | British | 76 years |
| Malcolm Robert Rimmer | Director | 20 Jul 2010 | 11 Jun 2015 | British | 67 years |
| Nicholas Swift | Director | 10 Jun 2008 | 7 Mar 2011 | British | 62 years |
| Nicolas Luc Daniel Vandevyver | Director | 4 Dec 2009 | 11 Jun 2015 | French | 62 years |
| Patrick Raymond Jeantet | Director | 10 Jun 2008 | 1 Feb 2011 | French | 66 years |
| Peter Robert Mayne | Director | 3 Jun 2009 | 14 Mar 2014 | British | 71 years |
| Prima Director Limited | Corporate Director | 23 Apr 2008 | 10 Jun 2008 | United Kingdom | - |
| Prima Secretary Limited | Corporate Secretary | 23 Apr 2008 | 10 Jun 2008 | United Kingdom | - |
| Ralph Leo Pidsley | Director | 2 Feb 2023 | 30 Aug 2024 | British | 63 years |
| Simon Patrick Butcher | Director | 14 Mar 2016 | 30 Nov 2018 | British | 59 years |
| Stephane Andre Richon | Director | 10 Jun 2008 | 6 May 2010 | French | 74 years |
| Thomas William Mclardy Smith | Director | 10 Jun 2008 | 31 Dec 2010 | British | 69 years |
| Wilma Mary Allan | Director | 14 Sept 2014 | 8 Dec 2017 | British | 64 years |