| Alison Ayodele Henwood | Director | 9 Feb 2017 | 31 Jan 2018 | British | 61 years |
| Andrew Philip Roberts | Director | 7 May 2010 | 14 Dec 2012 | British | 70 years |
| Andrew Thomas Cates | Director | 19 Feb 2001 | 27 Feb 2004 | British | 61 years |
| Andrew William Longden | Director | 3 Nov 2003 | 29 Sept 2014 | British | 69 years |
| Anno Harmen Joseph Scheltinga | Director | 15 Dec 2003 | 5 Aug 2004 | Dutch | 63 years |
| Armand Jean Margrete Lumens | Director | 16 May 2014 | 6 Dec 2016 | Dutch | 58 years |
| Bjorn Alexander Fermin | Director | 8 Oct 2012 | 28 Feb 2014 | Dutch | 64 years |
| Gregory Arthur Lewin | Director | 19 Feb 2001 | 4 Sept 2002 | Australian | 73 years |
| Harry Lyford Allan | Secretary | 19 Feb 2001 | 28 Feb 2011 | British | - |
| Herman Johan Stinis | Director | 23 Sept 2013 | 31 Jul 2021 | Dutch | 62 years |
| James William Murdoch | Director | 2 Aug 2004 | 28 Feb 2006 | British | 71 years |
| Martijn Plaum | Director | 7 Jun 2019 | 30 Sept 2021 | Dutch | 55 years |
| Matthew David Griffiths | Secretary | 4 Dec 2017 | 1 Jan 2020 | - | - |
| Paul John Vincent Trimmer | Director | 15 Dec 2003 | 4 Dec 2009 | British | 70 years |
| Peter John Hillman | Director | 19 Feb 2001 | 27 Feb 2006 | British | 81 years |
| Peter John Worby | Director | 7 May 2010 | 6 Nov 2015 | British | 70 years |
| Philip Hauxwell | Director | 4 May 2020 | 30 Sept 2021 | British | 48 years |
| Philip Hauxwell | Director | 9 Dec 2021 | 8 Aug 2022 | British | 48 years |
| Philippa Alice May Bounds | Secretary | 18 Mar 2016 | 4 Dec 2017 | - | - |
| Rahim Oberholtzer | Director | 6 Nov 2015 | 15 Dec 2016 | Us Citizen | 54 years |
| Ralph Neil Gaskell | Director | 19 Feb 2001 | 3 Nov 2003 | British | 78 years |
| Robert Edward Corran | Director | 2 Aug 2004 | 5 May 2010 | British | 72 years |
| Roland Alexander Ilube | Director | 6 Nov 2015 | 3 Apr 2018 | British | 55 years |
| Rupen Shashikant Tanna | Director | 1 Aug 2021 | 20 Oct 2025 | British | 52 years |
| Sharon Liow | Director | 9 Feb 2017 | 15 Apr 2019 | Malaysian | 52 years |
| Slavko Preocanin | Director | 7 May 2010 | 28 Apr 2017 | British | 61 years |
| Stuart Ritchie Bradford | Director | 7 May 2010 | 30 Sept 2013 | British | 63 years |
| Thomas Henry Summers | Director | 18 Jul 2022 | 1 Mar 2024 | British | 48 years |
| Thomas Jeffrey Brandt | Secretary | 1 Mar 2011 | 18 Mar 2016 | - | - |
| Tracy Anne Colgan | Director | 2 Mar 2006 | 1 Mar 2010 | British | 62 years |
| Wolfgang Eckehard Mende | Director | 2 Mar 2006 | 4 May 2010 | German | 76 years |