| Adeeba Malik | Director | 25 Jan 2007 | 29 Jan 2009 | British | 60 years |
| Adrian Alastair Montague | Director | 9 Nov 2005 | 26 Jul 2007 | British | 78 years |
| Alan Frederick Lutman | Secretary | 18 Nov 2004 | 31 Mar 2009 | British | - |
| Brenda Ann Harvey | Director | 1 Apr 2009 | 26 Jul 2012 | British | 71 years |
| Charles Christopher Anthony Neale | Director | 3 Mar 1999 | 3 Mar 1999 | British | 67 years |
| Christopher David Mitchell | Director | 4 Dec 2001 | 26 Nov 2009 | British | 72 years |
| Christopher John Mansell Coburn | Director | 7 Jul 2004 | 26 Jul 2012 | British | 86 years |
| Cornel John Howells | Secretary | 3 Mar 1999 | 18 Nov 2004 | British | - |
| David Brownfield Wain | Director | 3 Mar 1999 | 12 Jun 2003 | British | 99 years |
| David James Eaglesham | Director | 26 Jan 2012 | 31 Mar 2013 | British | 80 years |
| David John Fletcher | Director | 3 Mar 1999 | 25 Nov 2008 | British | 84 years |
| Diana Mary Organ | Director | 26 Nov 2009 | 26 Jul 2012 | British | 74 years |
| Frances Winifred Done | Director | 29 Jul 2003 | 26 Jul 2012 | British | 76 years |
| Harold Hernshaw Mills | Director | 26 Jan 2012 | 31 Mar 2013 | British | 88 years |
| Heather Jane Hancock | Director | 1 Aug 2000 | 16 Apr 2002 | British | 61 years |
| Helen Margaret Carey | Director | 3 Apr 2001 | 18 Nov 2010 | British | 85 years |
| Ian David John Valder | Director | 3 Mar 1999 | 26 Jul 2012 | British | 88 years |
| Jacqueline Ann Lewis | Director | 26 Jul 2012 | 11 Oct 2016 | British | 60 years |
| John Charles Fletcher | Director | 1 Aug 2000 | 23 Nov 2006 | British | 82 years |
| John Christopher Baines | Director | 5 Jun 2001 | 20 May 2007 | British | 79 years |
| John Morrison Hay Biggar | Director | 26 Jan 2012 | 22 Jan 2013 | British | 75 years |
| John Robert Hume | Director | 3 Mar 1999 | 31 Mar 2013 | British | 87 years |
| Judith Hope Niner | Director | 24 Jan 2008 | 31 Mar 2011 | British | 69 years |
| Katherine Michelle Dunwoodie | Director | 21 Mar 2019 | 4 Jul 2022 | British | 49 years |
| Laurence Richard Simon Newman | Director | 7 Jul 2004 | 26 Jul 2012 | British | 78 years |
| Michael Edward Ware | Director | 25 Apr 2000 | 31 Dec 2000 | British | 90 years |
| Neil Cossons | Director | 3 Mar 1999 | 16 Dec 2003 | British | 87 years |
| Peter Charles Weller Juniper | Secretary | 1 Apr 2009 | 1 Oct 2014 | - | - |
| Richard George Combes | Director | 29 Jul 2003 | 26 Jul 2012 | British | 81 years |
| Robin Edward Rowlinson Evans | Director | 26 Jul 2012 | 31 May 2013 | British | 72 years |
| Roger Gordon Hanbury | Director | 26 Jul 2012 | 30 Sept 2016 | British | 74 years |
| Simon Salem | Director | 4 Dec 2001 | 22 Mar 2004 | British | 69 years |
| Sir Peter Alfred Soulsby | Director | 3 Mar 1999 | 22 Nov 2003 | British | 78 years |
| Stephen Dunlop | Director | 26 Nov 2009 | 24 May 2012 | British | 65 years |
| Steven Pullinger | Director | 26 Jul 2012 | 19 Mar 2019 | British | 67 years |
| Stewart Anderson Sim | Director | 3 Mar 1999 | 3 Mar 1999 | British | 80 years |
| Vincent Patrick Moran | Director | 26 Jul 2012 | 3 Dec 2015 | British | 70 years |
| William Albert Schlegel | Director | 3 Mar 1999 | 3 Mar 1999 | British | 72 years |
| Yetunde Salami | Secretary | 1 Oct 2014 | 30 Sept 2020 | - | - |