| Andrew David Banks | Director | 2 Jun 2008 | 12 May 2011 | British | 70 years |
| Ann Irene Perkins | Director | 11 Aug 1992 | 7 Jun 1996 | British | - |
| Anne Patricia Munson | Secretary | 10 Apr 1992 | 21 Jul 2003 | British | - |
| Anthony George French | Director | 1 Mar 1996 | 30 Apr 1998 | British | 71 years |
| Colin Harry Petley | Director | 1 Mar 1996 | 31 Dec 2002 | British | 87 years |
| Colin Woods | Director | 10 Apr 1992 | 11 Aug 1992 | British | 106 years |
| David Gaven Cowden | Director | 10 Apr 1992 | 11 Aug 1992 | British | 85 years |
| David Gaven Cowden | Director | 27 Nov 1998 | 29 Nov 2000 | British | 85 years |
| David James Beaton | Director | 10 Aug 1994 | 30 Apr 1996 | British | 74 years |
| David James Benwell Taylor Smith | Director | 18 Feb 2002 | 13 Jul 2007 | British | 65 years |
| David Mel Zuydam | Director | 28 Feb 2014 | 16 May 2014 | British | 65 years |
| David Winter | Director | 11 Aug 1992 | 30 Apr 1996 | British | 82 years |
| Deborah Pryer | Director | 29 Nov 2000 | 1 Jul 2002 | British | 61 years |
| Derek Clifford Johnson | Director | 10 Apr 1992 | 11 Aug 1992 | British | 87 years |
| Elizabeth Mary Ogden | Director | 29 Nov 2000 | 1 Mar 2002 | British | 68 years |
| Fiona Mairi Walters | Director | 1 Mar 1996 | 23 Nov 2004 | British | 61 years |
| Fiona Walters | Director | 22 Jun 2022 | 12 Mar 2025 | British | 61 years |
| Gawie Murray Nienaber | Director | 28 Feb 2014 | 21 Jan 2022 | British | 69 years |
| Graham Austen Levinsohn | Director | 14 Jan 2019 | 7 Jan 2022 | British | 64 years |
| Henry William Mckay | Director | 11 Aug 1992 | 6 Apr 1999 | British | 87 years |
| Ian Stuart Parry | Director | 29 Aug 1996 | 2 Jan 1998 | British | 88 years |
| Irene Lavinia Elizabeth Cowden | Director | 11 Aug 1992 | 7 Jun 1996 | British | 73 years |
| Ivor Ward | Director | 28 Nov 2002 | 1 Oct 2006 | British | 81 years |
| James Darnton | Director | 7 Jun 2002 | 13 Jul 2007 | British | 61 years |
| James Darnton | Director | 11 Dec 2008 | 7 Mar 2011 | British | 61 years |
| James Michael Rowland Alston | Director | 13 Jul 2007 | 12 Jun 2008 | British | 60 years |
| Jean-pierre Taillon | Director | 16 May 2014 | 24 Nov 2015 | Canadian | 64 years |
| Jeffrey Pack | Director | 2 Jan 1998 | 24 Feb 2000 | British | 80 years |
| Jennifer Susan Makin | Director | 12 Jun 2008 | 24 Jun 2011 | British | 59 years |
| John Edward Metcalfe | Director | 1 Mar 1996 | 19 Mar 2001 | British | 89 years |
| John Paul Edwards | Director | 12 Sept 1997 | 2 Aug 1999 | British | 63 years |
| John Wild | Director | 10 Apr 1992 | 11 Aug 1992 | British | 89 years |
| Julian Mark Hartley | Director | 16 May 2014 | 15 Sept 2020 | British | 65 years |
| Leonard Keith Gateson | Secretary | 21 Jul 2003 | 23 Nov 2004 | British | - |
| Margaret Ann Ryan | Director | 28 Feb 1997 | 8 Feb 1999 | Australian | 66 years |
| Michael William Hewlett Branch | Director | 10 Aug 1994 | 1 Mar 2001 | British | 87 years |
| Nathan Richards | Director | 12 Oct 2011 | 28 Feb 2014 | British | 57 years |
| Nathan Richards | Secretary | 23 Nov 2004 | 28 Nov 2008 | British | - |
| Nicholas Peter Buckles | Director | 6 Dec 1999 | 26 Apr 2002 | British | 65 years |
| Paul Edmund Moonan | Director | 1 Feb 2007 | 2 Jun 2008 | British | 65 years |
| Paul Francis | Director | 7 Jun 2002 | 23 Nov 2004 | British | 73 years |
| Paul Martin Etheridge | Director | 8 Feb 1999 | 28 Feb 2001 | British | 79 years |
| Peter Gerald Valentine Pike | Director | 10 Apr 1992 | 11 Aug 1992 | British | 96 years |
| Peter Martin Stansfield | Director | 12 Sept 1994 | 29 Nov 2000 | British | 76 years |
| Peter Neden | Director | 24 Nov 2015 | 31 Dec 2018 | British | 58 years |
| Raymon Harry Anning | Director | 10 Apr 1992 | 11 Aug 1992 | British | 96 years |
| Richard Folliott Powell | Director | 10 Apr 1992 | 1 Oct 1998 | British | 84 years |
| Richard George Hawkins | Director | 31 Jul 1995 | 2 Jan 1998 | British | 77 years |
| Richard Morris | Director | 9 May 2011 | 23 Oct 2013 | British | 51 years |
| Roger John Teal | Director | 10 Apr 1992 | 7 Jun 1996 | British | 80 years |
| Ronald Gerrard Haworth | Director | 10 Apr 1992 | 17 Sept 1992 | British | 85 years |
| Roy Arthur Woolford | Director | 19 Feb 2003 | 23 Nov 2004 | British | 74 years |
| Stuart Edward Curl | Director | 7 Mar 2011 | 28 Feb 2014 | British | 65 years |
| Trevor Leslie Dighton | Director | 2 Jan 1998 | 23 Nov 2004 | British | 77 years |
| Vaishali Jagdish Patel | Secretary | 28 Nov 2008 | 5 May 2021 | British | - |