| Andrew Michael Pratt | Director | 23 Jul 2007 | 31 Dec 2010 | British | 76 years |
| Andrew Rolland Cunningham | Director | 4 Jun 1999 | 31 Dec 2015 | British | 70 years |
| Brian Aidan Crumbley | Director | 4 Jun 1999 | 30 Sept 2005 | British | 68 years |
| Debra Rachel Yudolph | Director | 5 May 2004 | 19 Dec 2008 | British | 62 years |
| Eliza Pattinson | Director | 23 Apr 2019 | 9 Nov 2022 | British | 52 years |
| Geoffrey Joseph Davis | Director | 4 Jun 1999 | 2 Nov 2006 | British | 69 years |
| Geoffrey Joseph Davis | Secretary | 4 Jun 1999 | 1 Oct 2003 | British | - |
| Gordon Henry Smith | Secretary | 10 Feb 1995 | 4 Jun 1999 | British | - |
| Helen Christine Gordon | Director | 31 Dec 2015 | 5 Dec 2022 | British | 67 years |
| John Francis Holroyd | Director | 7 Apr 1995 | 31 Aug 1995 | British | 108 years |
| John Richard Bainbridge | Director | 1 Jan 1998 | 4 Jun 1999 | British | 77 years |
| John Ryan | Director | 9 Jun 1999 | 5 May 2004 | British | 73 years |
| Lewis Llewelyn Lewis | Director | 10 Feb 1995 | 4 Jun 1999 | British | 90 years |
| Marie Louise Glanville | Secretary | 1 Oct 2003 | 22 Dec 2008 | English | - |
| Mark Greenwood | Director | 7 Dec 2010 | 22 Dec 2015 | British | 67 years |
| Mark Jeremy Robson | Director | 6 Aug 1999 | 30 Apr 2019 | British | 67 years |
| Michael Patrick Windle | Secretary | 18 Dec 2008 | 4 Mar 2016 | British | - |
| Nicholas Mark Fletcher Jopling | Director | 7 Dec 2010 | 20 Dec 2017 | British | 65 years |
| Nicholas Peter On | Director | 23 Jan 2009 | 30 Sept 2016 | British | 63 years |
| Peter Christopher George Schwerdt | Director | 5 May 2004 | 30 Jun 2007 | British | 68 years |
| Peter Longton Jones | Director | 10 Feb 1995 | 4 Jun 1999 | British | 93 years |
| Peter Quentin Patrick Couch | Director | 7 Dec 2010 | 31 Jan 2014 | British | 68 years |
| Peter Rathbone Deyes | Director | 10 Feb 1995 | 4 Jun 1999 | British | 87 years |
| Richard Bryce Ellison | Director | 10 Feb 1995 | 4 Jun 1999 | British | 92 years |
| Robert Jan Hudson | Director | 25 Mar 2022 | 5 Dec 2022 | British | 53 years |
| Rupert Jerome Dickinson | Director | 5 May 2004 | 20 Oct 2009 | British | 67 years |
| Sean Anthony Slade | Director | 5 May 2004 | 12 Nov 2004 | British | 62 years |
| Stephen Dickinson | Director | 4 Jun 1999 | 5 May 2004 | British | 92 years |
| Vanessa Kate Simms | Director | 11 Feb 2016 | 26 Apr 2021 | British | 51 years |