| Adrian James Henry Ewer | Director | 19 Apr 1993 | 1 Aug 1996 | British | 72 years |
| Adrian James Henry Ewer | Director | 27 Mar 2002 | 26 Mar 2014 | British | 72 years |
| Andrew Erskine Friend | Director | 31 May 2002 | 30 Sept 2006 | British | 73 years |
| Antonie Paul Woodbury | Director | 22 Dec 2008 | 30 Sept 2010 | British | 65 years |
| Benjamin Jon Grew | Director | 6 Apr 2023 | 11 May 2023 | British | 43 years |
| Charles David Spencer Porter | Director | 1 Aug 1996 | 10 Sept 1997 | British | 59 years |
| Christopher Brian Waples | Director | 14 Jul 2008 | 31 Jan 2019 | British | 66 years |
| Clare Underwood | Director | 31 Jan 2019 | 14 Jan 2022 | British | 53 years |
| David Ian Smith | Director | 19 Apr 1993 | 27 Mar 2002 | British | 73 years |
| David Ian Smith | Secretary | 19 Apr 1993 | 27 Mar 2002 | British | - |
| David Martin Lowry | Director | 10 Aug 2020 | 21 Oct 2020 | British | 44 years |
| Derek William Featherstone | Secretary | 31 May 1991 | 19 Apr 1993 | British | - |
| Derrick Ardern | Director | 19 Apr 1993 | 31 May 2002 | British | 80 years |
| Emily Louise Martin | Director | 1 Aug 2020 | 31 Jan 2022 | British | 48 years |
| Emily Martin | Secretary | 8 May 2019 | 31 Jan 2022 | - | - |
| Guy Roland Marc Pigache | Director | 22 Dec 2008 | 9 Jul 2014 | British | 65 years |
| Helen Christine Gordon | Director | 19 Apr 1993 | 16 Sept 1997 | British | 66 years |
| James Armstrong | Director | 19 Apr 1993 | 2 Nov 1998 | British | 86 years |
| James Haydn Abbott | Director | 20 Mar 2023 | 17 Apr 2025 | British | 46 years |
| Jon Rushton | Director | 31 May 1991 | 19 Apr 1993 | British | 92 years |
| Luciana Germinario | Director | 8 May 2019 | 31 Jul 2020 | English | 51 years |
| Lynette Gillian Krige | Director | 14 Jul 2008 | 30 Apr 2011 | British | 59 years |
| Maria Lewis | Secretary | 27 Sept 2012 | 4 Sept 2015 | British | - |
| Mark Ralph Lester | Director | 19 Apr 1993 | 26 Oct 1998 | British | 66 years |
| Patrick Francis John O'donnell Bourke | Director | 1 May 2011 | 9 May 2019 | British | 68 years |
| Philip Naylor | Secretary | 4 Sept 2015 | 18 Jan 2019 | - | - |
| Robert Alec Wood | Director | 31 May 1991 | 19 Apr 1993 | British | 83 years |
| Robert Mark Taylor | Director | 31 May 1991 | 30 Sept 1991 | British | 74 years |
| Roger Keith Miller | Director | 30 Sept 2006 | 27 Sept 2012 | British | 68 years |
| Roger Keith Miller | Secretary | 27 Mar 2002 | 27 Sept 2012 | British | - |
| Roger Paul Greville | Director | 22 Dec 2008 | 23 Jan 2012 | New Zealander | 68 years |
| Stuart David Yeatman | Director | 9 Jul 2014 | 31 Oct 2016 | British | 64 years |
| Stuart Martin Colvin | Director | 1 Feb 2022 | 6 Apr 2023 | British | 53 years |
| Susan Elizabeth Gray | Director | 11 Oct 1999 | 10 Feb 2002 | British | 59 years |
| Victoria Burnett | Secretary | 1 Feb 2022 | 14 Dec 2022 | - | - |
| Warren Lee | Director | 14 Jan 2022 | 20 Mar 2023 | British,american | 45 years |