| Adrian James Henry Ewer | Director | 31 Mar 2001 | 26 Mar 2014 | British | 72 years |
| Ailsa Jane Emerson | Director | 10 Apr 2002 | 30 Jun 2004 | British | 64 years |
| Benjamin Jon Grew | Director | 6 Apr 2023 | 11 May 2023 | British | 43 years |
| Bryan Scott Gregory | Director | 31 May 1992 | 1 Mar 1993 | British | 85 years |
| Clare Underwood | Director | 8 May 2019 | 14 Jan 2022 | British | 53 years |
| Denis Christopher Madden | Director | 31 May 1992 | 31 Mar 2001 | British | 85 years |
| Derek William Featherstone | Secretary | 31 May 1992 | 1 Nov 1999 | British | - |
| Elspeth Ann Glencorse Swain | Director | 18 Jan 1995 | 31 Mar 2001 | British | 77 years |
| Emily Martin | Secretary | 8 May 2019 | 31 Jan 2022 | - | - |
| Graham Douglas Gibson | Director | 31 Mar 2001 | 6 Oct 2004 | British | 77 years |
| James Haydn Abbott | Director | 20 Mar 2023 | 17 Apr 2025 | British | 46 years |
| Lynette Gillian Krige | Director | 6 Oct 2004 | 30 Apr 2011 | British | 59 years |
| Maria Lewis | Secretary | 27 Sept 2012 | 4 Sept 2015 | British | - |
| Patrick Francis John O'donnell Bourke | Director | 1 May 2011 | 8 May 2019 | British | 68 years |
| Philip Naylor | Secretary | 4 Sept 2015 | 18 Jan 2019 | - | - |
| Richard Ian Sumner | Director | 31 Mar 2001 | 10 Apr 2002 | British | 78 years |
| Robert Alec Wood | Director | 31 May 1992 | 31 Mar 2001 | British | 83 years |
| Roger Keith Miller | Director | 31 Mar 2001 | 27 Sept 2012 | British | 68 years |
| Roger Keith Miller | Secretary | 1 Nov 1999 | 27 Sept 2012 | British | - |
| Stuart Martin Colvin | Director | 8 May 2019 | 6 Apr 2023 | British | 53 years |
| Timothy Garnet Foster | Director | 26 Mar 2014 | 17 Jan 2019 | British | 67 years |
| Victoria Burnett | Secretary | 1 Feb 2022 | 14 Dec 2022 | - | - |
| Warren Lee | Director | 14 Jan 2022 | 20 Mar 2023 | British,american | 45 years |
| William Wilson Forrester | Director | 21 Feb 2002 | 30 Jun 2004 | British | 85 years |