| Andrew John Cumming | Director | 8 Jul 2010 | 3 Apr 2012 | British | 72 years |
| Andrew John Kemp | Director | 9 Jan 2017 | 28 Jun 2018 | British | 56 years |
| Anne Elizabeth Myers | Director | 17 Jun 1991 | 28 Jan 1993 | British | 74 years |
| Anne Elizabeth Myers | Secretary | 17 Jun 1991 | 28 Jan 1993 | British | - |
| Anthony Wilfrid Jukes | Director | 19 Dec 1996 | 30 Dec 2004 | British | 83 years |
| Ceri Richards | Director | 13 Jul 2007 | 23 Apr 2010 | British | 68 years |
| Charles Stephen Cockroft | Director | 17 Jun 1991 | 22 Sept 1993 | British | 90 years |
| Colin Graham Dowsett | Director | 8 Jul 2010 | 22 Nov 2023 | British | 62 years |
| David Lawrence Shindler | Director | 13 Jul 2007 | 9 Jul 2010 | British | 68 years |
| Diane Catherine Gaskin | Director | 26 Sept 2002 | 30 Dec 2004 | British | 67 years |
| Donald James Mcpherson | Director | 27 Jan 1995 | 19 Dec 1996 | British | 65 years |
| George Edward Mitchell | Director | 31 Jan 2002 | 1 Dec 2003 | British | 76 years |
| Gerard Ashley Fox | Director | 29 May 2013 | 13 Jan 2022 | British | 63 years |
| James Douglas Mortimer Smallwood | Director | 19 Dec 1996 | 17 Dec 2003 | British | 71 years |
| Joe Aitken | Director | 5 Nov 2007 | 8 Sept 2008 | British | 75 years |
| John Robert Turner | Director | 13 Jan 2022 | 30 Jan 2024 | British | 62 years |
| Keith Joseph Macdonald | Director | 8 Jul 2010 | 21 Mar 2013 | Irish | 69 years |
| Keith Roderick Glasscoe | Director | 5 Nov 2007 | 31 Aug 2009 | British | 64 years |
| Lambertus Hendrik Veldhuizen | Director | 8 Jul 2010 | 30 Sept 2011 | Dutch | 59 years |
| Liam James Kavanagh | Director | 1 Sept 2008 | 31 Aug 2011 | British | 58 years |
| Lindsay John Town | Director | 1 May 1999 | 5 Nov 2007 | British | 72 years |
| Matthew Sebastian Lodge | Director | 25 Jan 1993 | 19 Dec 1996 | British | 66 years |
| Matthew Sebastian Lodge | Secretary | 25 Jan 1993 | 30 Sept 2005 | British | - |
| Michael Alastair Couzens | Director | 30 Sept 1993 | 27 Jan 1995 | British | 62 years |
| Michael Henry Ellis | Director | 19 Dec 1996 | 1 Mar 1997 | British | 75 years |
| Michael Wooderson | Director | 1 Dec 2003 | 30 Dec 2004 | British | 72 years |
| Michelle Antoinette Angela Johnson | Secretary | 3 Sept 2013 | 25 Oct 2017 | - | - |
| Paul Gittins | Secretary | 30 Sept 2005 | 3 Sept 2013 | British | - |
| Richard Owen Williams | Director | 14 Nov 2011 | 19 Sept 2016 | British | 67 years |
| Robin Alexander Isaacs | Director | 18 May 2012 | 13 Dec 2012 | British | 71 years |
| Sean Brendan Allen | Director | 13 Sept 2011 | 30 Apr 2012 | British | 60 years |
| Simon Christopher Gledhill | Director | 8 Jul 2010 | 29 May 2013 | British | 61 years |
| Stephen John Peters | Director | 18 Dec 1997 | 21 Feb 2006 | British | 73 years |
| Stephen John Peters | Director | 13 Jul 2007 | 22 Jul 2008 | British | 73 years |
| Stephen Robert Shelley | Director | 18 May 2012 | 21 Aug 2012 | British | 59 years |
| Stephen Rosenstjerne Krag | Director | 8 Jun 2000 | 10 Jul 2002 | British | 67 years |
| Stewart Fraser Livingston | Director | 21 Feb 2006 | 5 Nov 2007 | British | 62 years |
| Timothy James Goode | Director | 19 Dec 1996 | 23 May 2000 | British | 73 years |
| Timothy John Cooke | Director | 18 May 2012 | 14 Aug 2012 | British | 67 years |
| Yvonne Easton Sharp | Director | 5 Nov 2007 | 30 Jun 2010 | British | 54 years |