| Alan Clemmons Coe | Director | 2 Feb 1995 | 25 Mar 2002 | U S Citizen | 75 years |
| Alexander David Baldock | Director | 8 Aug 2008 | 31 Aug 2012 | British | 56 years |
| Amy Louise Noble | Director | 30 Sept 2024 | 25 Jul 2025 | British | 37 years |
| Amy Williamson | Secretary | 22 Feb 2012 | 14 Sept 2012 | - | - |
| Andrew Paul Gadsby | Director | 27 Feb 2015 | 3 Apr 2018 | British | 60 years |
| Angela Mary Cunningham | Secretary | 27 Feb 2002 | 27 Nov 2006 | British | - |
| Arthur Geoffrey Slade | Director | 19 Sept 1995 | 7 Nov 1996 | British | 81 years |
| Bruce Alan Shipman | Director | 26 Jul 2002 | 1 Dec 2004 | American | 76 years |
| Calvin Chris Harling | Director | 31 Oct 1994 | 1 Nov 1999 | Usa | 77 years |
| Christopher Paul Stamper | Director | 12 Feb 1997 | 18 Nov 1999 | British | 71 years |
| Christopher Paul Sullivan | Director | 8 Nov 1999 | 29 Feb 2004 | British | 69 years |
| Christopher Robert Morgan | Director | 24 Oct 1997 | 22 Jul 2002 | British | 79 years |
| Curt Fred Glenn | Director | 17 Feb 2003 | 1 Dec 2004 | American | 72 years |
| David Allistair Galloway | Director | 12 Feb 1993 | 31 Oct 1994 | British | 81 years |
| Derek John Lewis | Secretary | 15 Apr 1997 | 26 Feb 2002 | British | - |
| Duane Edward Snelling | Director | 16 Dec 2016 | 30 Jun 2017 | British | 63 years |
| Edwin Redman Mihm | Director | 31 Jan 2000 | 26 Jul 2002 | American | 90 years |
| Eion Arthur Mcmorran Flint | Director | 1 Jul 2001 | 21 Oct 2003 | British | 74 years |
| Eion Arthur Mcmorran Flint | Director | 5 May 2004 | 1 Dec 2004 | British | 74 years |
| Gillian Wraith Carter | Secretary | 27 Nov 2006 | 8 Aug 2008 | British | - |
| Ian Campbell Mcvicar | Director | 17 Feb 2003 | 27 Feb 2015 | British | 64 years |
| Ian John Isaac | Director | 30 Jun 2017 | 30 Sept 2024 | British | 63 years |
| James Higginbotham | Director | 27 Feb 2015 | 21 Feb 2017 | British | 57 years |
| James Stanley Mann | Director | 7 Nov 1996 | 14 Sept 1999 | British | 80 years |
| Jeffrey Johnson | Director | 12 Feb 1993 | 8 Nov 1999 | British | 81 years |
| John David Padley | Director | 31 Oct 1994 | 24 Oct 1997 | British | 86 years |
| John David Stuart | Director | 1 Jul 2001 | 22 Jul 2002 | British | 63 years |
| John Douglas Purdy | Director | 12 Feb 1993 | 31 Dec 1996 | British | 89 years |
| John Hamer Wood | Director | 16 Dec 2016 | 30 Jun 2017 | British | 64 years |
| Joseph Alexander Pattara | Director | 3 Apr 2018 | 30 Dec 2021 | British | 53 years |
| Kirsty Daly | Secretary | 1 Jun 2011 | 11 Jan 2012 | - | - |
| Lindsey Helen Cameron | Secretary | 8 Aug 2008 | 31 May 2011 | Other | - |
| Malcolm Murray Robertson | Director | 12 Feb 1993 | 8 Apr 1994 | British | 72 years |
| Margaret Janet Evans | Secretary | 31 Oct 1994 | 15 Apr 1997 | British | - |
| Mark Lees Young | Director | 31 Oct 1994 | 31 Oct 1994 | British | 67 years |
| Mark Lees Young | Secretary | 12 Feb 1993 | 31 Oct 1994 | British | - |
| Michael Alan Maberly | Director | 12 Feb 1993 | 6 Sept 1995 | British | 90 years |
| Michael Jay O'donnell | Director | 16 Jul 1999 | 5 Feb 2001 | American | 75 years |
| Nigel Pearce | Director | 26 Jan 2004 | 29 Feb 2004 | British | 75 years |
| Nigel Pearce | Director | 1 Mar 2004 | 5 May 2004 | British | 75 years |
| Nigel Timothy John Clibbens | Director | 21 Oct 2003 | 27 Feb 2015 | British | 67 years |
| Paul Anthony Lynam | Director | 1 Nov 2004 | 8 Aug 2008 | Irish | 58 years |
| Paul Marrow | Director | 1 Mar 2004 | 31 Oct 2004 | British | 74 years |
| Peter Edmund Lord | Director | 25 Oct 1999 | 30 Jun 2001 | British | 68 years |
| Peter Moffat | Director | 30 Dec 2021 | 30 Sept 2024 | British | 48 years |
| Peter Robert Harris | Director | 26 Apr 1994 | 31 Oct 1994 | British | 75 years |
| Richard Neil Soskin | Director | 31 Oct 1994 | 16 Jul 1999 | American | 70 years |
| Robert Duncan Brodie | Director | 25 Nov 1999 | 30 Jun 2001 | British | 61 years |
| Robert Duncan Brodie | Director | 26 Jul 2002 | 29 Feb 2004 | British | 61 years |
| Robert Joseph Verzello Jr | Director | 26 Jul 2002 | 31 Dec 2002 | Usa | 64 years |
| Ronald James Young | Director | 12 Feb 1993 | 31 Oct 1994 | British | 93 years |
| Scott Alden Spicer | Director | 31 Oct 1994 | 17 Feb 2003 | American | 76 years |
| Stuart Gregory Clark | Director | 3 Apr 2018 | 28 Jun 2024 | British | 58 years |
| Tom Mcgreal | Director | 24 Apr 2002 | 1 Dec 2004 | American | 77 years |
| Trevor Douglas Crome | Director | 27 Feb 2015 | 28 Jun 2016 | British | 66 years |