| Adam Paul Rutherford | Secretary | 27 Oct 1998 | 14 Jan 2000 | British | - |
| Alan Christopher Wren | Director | 9 May 1992 | 21 Nov 1992 | British | 78 years |
| Alexander Daniel Jeffrey | Director | 21 Jun 2017 | 23 Mar 2018 | British | 60 years |
| Alison Morris | Director | 1 Oct 2021 | 6 Sept 2024 | British | 67 years |
| Andrew Tamlyn | Director | 14 May 1998 | 30 Jun 1999 | British | 68 years |
| Angela Sigley | Secretary | 14 Jan 2000 | 20 Mar 2000 | British | - |
| Anthony John Ashplant | Director | 8 Nov 1999 | 15 Nov 2001 | British | 72 years |
| Anthony John Ashplant | Director | 10 Sept 2013 | 23 Mar 2016 | British | 72 years |
| Chris Chaloner | Director | 1 Oct 2021 | 2 Sept 2025 | British | 68 years |
| Christopher Ian Jackson | Director | 31 Dec 2003 | 30 Apr 2013 | British | 60 years |
| David Kenneth Watson | Director | 28 Sept 1999 | 15 Nov 2001 | British | 67 years |
| David William Dibben | Director | 15 Nov 2001 | 31 Oct 2004 | British | 66 years |
| Deborah Jacqueline Carter | Director | 24 Feb 2005 | 31 Oct 2008 | British | 62 years |
| Fiona Jane Molloy | Secretary | 26 Jun 2002 | 13 Jan 2006 | British | - |
| Gary Nicholas Cotton | Director | 20 Apr 2016 | 30 Sept 2019 | British | 57 years |
| Gary Paul John Shaughnessy | Director | 24 Oct 2001 | 12 Jun 2008 | British | 60 years |
| Graham Williamson Macdowall | Director | 15 Nov 2001 | 31 Oct 2013 | British | 63 years |
| Grant Robert Fairlie Speirs | Director | 22 Aug 2013 | 31 Jan 2019 | British | 55 years |
| Hugh Royston Jenkins | Director | 9 May 1992 | 31 Dec 1995 | British | 93 years |
| John Kenneth Elbourne | Director | 27 Mar 1997 | 14 May 1998 | British | 82 years |
| John Michael Page | Director | 5 Nov 2013 | 10 May 2016 | British | 55 years |
| John Richard Talbot | Director | 15 Nov 2001 | 30 Jun 2013 | British | 75 years |
| John Tomlins | Director | 30 Dec 1996 | 6 Jun 1997 | British | 78 years |
| Jonathan Carl Leslie Willcocks | Director | 20 Feb 2020 | 1 Oct 2021 | British | 59 years |
| Jonathan Mark Brewis Daniels | Director | 17 Oct 2019 | 4 Apr 2023 | British | 63 years |
| Jonathan Peter Mcclelland | Secretary | 26 Feb 2001 | 26 Jun 2002 | British | - |
| Keith Leonard Bedell Pearce | Director | 9 May 1992 | 6 Apr 1997 | British | 80 years |
| Kerryn Lynn Macdonald | Secretary | 30 Apr 2004 | 9 Mar 2005 | British | - |
| Laurence John Mumford | Director | 17 Dec 2004 | 31 Oct 2013 | British | 60 years |
| Lavinia Ulrike Darby | Director | 24 Sept 2008 | 23 Dec 2011 | British | 57 years |
| Leslie John Scrine | Director | 8 Apr 2005 | 30 Apr 2012 | British | 68 years |
| Margaret Mary Ammon | Director | 20 Mar 2018 | 17 Oct 2019 | British | 59 years |
| Maria Luisa Cassoni | Director | 3 Jan 1996 | 14 May 1998 | British | 75 years |
| Martin Lewis | Director | 28 Sept 1999 | 13 Jun 2016 | British | 70 years |
| Meagen Lyn Burnett | Director | 18 Feb 2020 | 1 Oct 2021 | Irish | 52 years |
| Michelle Sylvia Scrimgeour | Director | 22 Aug 2013 | 23 Feb 2017 | British | 63 years |
| Neil Michael Donnelly | Director | 9 Jun 2017 | 29 Oct 2019 | Irish | 54 years |
| Nicholas Andrew Courtenay-smith | Director | 1 Oct 2002 | 19 Jan 2004 | British | 76 years |
| Nicholas Ben-gough Alliston | Director | 9 Jun 1997 | 6 Nov 1997 | British | 80 years |
| Nigel Stephen Boyling | Director | 30 Jun 1999 | 15 Nov 2001 | British | 70 years |
| Richard Julian Field | Director | 2 Sept 2002 | 8 May 2003 | British | 63 years |
| Robert Charles Trant Higginbotham | Director | 14 May 1998 | 30 Jun 1999 | British | 59 years |
| Robert Walker | Secretary | 9 May 1992 | 27 Oct 1998 | British | - |
| Rodney Malcolm Cook | Director | 8 Jan 2004 | 13 Jun 2006 | British/australian | 69 years |
| Sean Andrew Fitzgerald | Director | 9 Sept 2019 | 13 Jan 2025 | British | 61 years |
| Simon Humphrey Westland Pilcher | Director | 28 Aug 2013 | 1 Apr 2019 | British | 60 years |
| Stephen James Cook | Director | 14 May 1998 | 30 Jul 1999 | British | 75 years |
| Susan Doreen Windridge | Secretary | 20 Mar 2000 | 26 Feb 2001 | British | - |
| Symon Elliott | Director | 1 Mar 1993 | 28 Feb 1995 | British | 69 years |
| William Allan Donaldson | Director | 14 May 1998 | 21 Dec 1998 | British | 62 years |
| William John Nott | Director | 27 Mar 2006 | 31 Oct 2013 | British | 64 years |