| Alan Mark Gerrett | Director | 1 May 2009 | 14 Oct 2011 | British | 67 years |
| Alan Robert Robertson | Director | 9 Feb 2009 | 31 Dec 2023 | British | 64 years |
| Alison Taylor West | Secretary | 10 Feb 2009 | 31 Jul 2014 | British | - |
| Andries Johannes De Jong | Director | 21 Nov 2005 | 31 Dec 2008 | Dutch | 76 years |
| Anthony Richard Towse | Director | 26 Sept 2012 | 4 Nov 2021 | British | 58 years |
| Christopher Francis O'donnell | Director | 1 May 2009 | 4 Jan 2010 | British | 78 years |
| David John Webb | Secretary | 22 Sept 2005 | 10 Feb 2009 | British | - |
| Frank Stevenson | Director | 28 Mar 1992 | 31 Oct 2005 | British | 82 years |
| Frank Stevenson | Secretary | 28 Mar 1992 | 22 Sept 2005 | British | - |
| Henk Hendrik Wille Renier August Maria Janssen | Director | 21 Nov 2005 | 18 May 2009 | British | 72 years |
| Hugh David Wellesley Hoggard | Director | 28 Mar 1992 | 23 Mar 1995 | British | 103 years |
| James Michael Mcneilly | Director | 1 Oct 2004 | 12 Feb 2010 | British | 69 years |
| John Phillip Hume | Director | 1 May 2009 | 1 Jul 2010 | British | 78 years |
| Jonathon Michael Humphries | Director | 12 Feb 2010 | 26 Sept 2012 | British | 59 years |
| Lynsey Taylor | Director | 2 Jul 2018 | 1 Feb 2021 | British | 51 years |
| Michael Smith | Director | 28 Mar 1992 | 1 Oct 2004 | British | 85 years |
| Naomi Anne Connell | Director | 15 Mar 2011 | 16 Jul 2023 | British | 61 years |
| Nicola Jayne O’keeffe | Director | 21 Nov 2022 | 8 Nov 2024 | British | 55 years |
| Paul Alfred Roebuck | Director | 28 Mar 1992 | 30 Apr 2009 | British | 79 years |
| Robert Damian Coupe | Director | 24 May 2010 | 1 Feb 2021 | British | 61 years |
| Robert Wilson | Director | 28 Mar 1992 | 10 Apr 1991 | British | 76 years |
| Willem Hendrik Franciscus Cornelis Eschbach | Director | 28 Mar 1992 | 24 Mar 1993 | Dutch | 77 years |