| Alan Edward Wheatley | Director | 1 Mar 1993 | 30 Apr 2002 | British | 87 years |
| Andrew William Palmer | Director | 1 Jan 1996 | 1 Sept 2009 | British | 72 years |
| Anthony John Hobson | Director | 30 May 1992 | 28 Feb 2001 | British | 78 years |
| Baroness (elspeth Morton) Howe Of Idlicote | Director | 30 May 1992 | 14 May 1997 | British | 93 years |
| Bernard Harry Asher | Director | 1 Mar 1998 | 28 Apr 2004 | British | 89 years |
| Beverley Cliffe Hodson | Director | 1 Dec 2000 | 16 May 2007 | British | 74 years |
| Carolyn Jane Bradley | Director | 8 Dec 2014 | 31 Dec 2018 | British | 61 years |
| Catherine Rosemary Reid Avery | Director | 1 Jan 2001 | 28 Jan 2009 | British | 65 years |
| Charles John Bowen | Director | 1 Oct 1996 | 20 Apr 1999 | British | 84 years |
| Christopher George Francis Harding | Director | 1 Jan 1993 | 13 Dec 1999 | British | 86 years |
| Claire Anne Davies | Secretary | 1 Aug 2005 | 31 Aug 2008 | Other | - |
| Clara Hedwig Frances Furse | Director | 1 Jun 2009 | 1 May 2013 | British | 68 years |
| David Alan Walker | Director | 1 Mar 2002 | 25 May 2011 | British | 86 years |
| David Edward Reid | Director | 1 Nov 1995 | 13 Feb 1997 | British | 78 years |
| David John Prosser | Director | 30 May 1992 | 31 Dec 2005 | British | 81 years |
| David Rough | Director | 30 May 1992 | 31 Dec 2001 | British | 74 years |
| David Wyn Binding | Secretary | 31 Jan 1994 | 1 Aug 2005 | British | - |
| Frances Anne Heaton | Director | 1 Jul 2001 | 2 Nov 2010 | British | 81 years |
| Frederick Crawford | Director | 30 May 1992 | 14 May 1997 | British | 94 years |
| Gareth John Hoskin | Director | 1 Jan 2001 | 11 Nov 2003 | British | 65 years |
| Henry Eric Staunton | Director | 1 May 2004 | 22 May 2013 | British | 77 years |
| Honor Mary Ruth Chapman | Director | 1 Jan 1993 | 25 Apr 2001 | British | 83 years |
| James Ball | Director | 30 May 1992 | 18 May 1994 | British | 92 years |
| James Murray Strachan | Director | 1 Dec 2003 | 25 May 2011 | British | 72 years |
| John Barrie Morgans | Director | 1 Oct 1997 | 18 May 2006 | British | 84 years |
| John Brackenridge Pollock | Director | 11 Dec 2003 | 21 May 2015 | British | 67 years |
| John Edwin Neill | Secretary | 30 May 1992 | 31 Jan 1994 | British | - |
| John Leopold Egan | Director | 30 May 1992 | 13 May 1998 | British | 86 years |
| John Morrison Stewart | Director | 1 Jan 2010 | 1 Jun 2016 | British | 76 years |
| John Stewart Kerridge | Director | 30 May 1992 | 18 May 1994 | British | 90 years |
| Julia Susan Wilson | Director | 9 Nov 2011 | 31 Mar 2021 | British | 58 years |
| Kenneth Herbert Morley Dixon | Director | 30 May 1992 | 18 May 1994 | British | 96 years |
| Kerrigan William Procter | Director | 9 Mar 2017 | 26 Nov 2020 | British | 56 years |
| Lesley Mary Samuel Knox | Director | 1 Jun 2016 | 21 May 2025 | South African | 72 years |
| Lindsay Peter Tomlinson | Director | 1 May 2013 | 21 May 2015 | British | 74 years |
| Lizabeth Herbst Zlatkus | Director | 1 Dec 2013 | 31 Aug 2016 | American | 67 years |
| Madeleine Elizabeth Sclater Wall | Director | 1 Oct 1998 | 28 Sept 2001 | British | 78 years |
| Mark Joseph Zinkula | Director | 18 Sept 2012 | 31 Aug 2019 | American | 58 years |
| Mark Julian Gregory | Director | 28 Jan 2009 | 9 Mar 2017 | British | 62 years |
| Michael Edward Fairey | Director | 1 May 2011 | 21 May 2014 | British | 77 years |
| Michelle Sylvia Scrimgeour | Director | 2 Sept 2019 | 26 Nov 2020 | British | 62 years |
| Nicholas Edward Tucker Prettejohn | Director | 2 Nov 2010 | 6 Jun 2013 | British | 65 years |
| Nigel David Wilson | Director | 1 Sept 2009 | 31 Dec 2023 | British | 69 years |
| Olaf Swantee | Director | 1 Aug 2014 | 26 May 2016 | Dutch | 59 years |
| Philip Arthur John Broadley | Director | 8 Jul 2016 | 31 Aug 2025 | British | 64 years |
| Rafe Henry Clutton | Director | 30 May 1992 | 19 May 1993 | British | 96 years |
| Richard Ernest Butler Lloyd | Director | 30 May 1992 | 19 May 1993 | British | 97 years |
| Richard Henry Meddings | Director | 1 Dec 2014 | 25 May 2017 | British | 67 years |
| Robert John Margetts | Director | 12 Jun 1996 | 28 Feb 2010 | British | 79 years |
| Robin Ashley Phipps | Director | 1 Jan 1996 | 13 Jul 2007 | British | 75 years |
| Ronaldo Hermann Schmitz | Director | 1 Oct 2000 | 26 May 2010 | German | 87 years |
| Rudolph Harold Peter Markham | Director | 4 Oct 2006 | 25 May 2017 | British | 79 years |
| Stuart Godfrey Popham | Director | 1 Jul 2011 | 31 Dec 2016 | British | 71 years |
| Terence Burns | Director | 7 Jan 1999 | 21 Nov 2001 | British | 81 years |
| Thomas Jasper Manners | Director | 30 May 1992 | 30 May 1993 | British | 96 years |
| Timothy Charles Parker | Director | 1 May 2002 | 5 Jul 2004 | British | 70 years |
| Timothy James Breedon | Director | 1 Jan 2002 | 30 Jun 2012 | British | 67 years |
| Toby Emil Strauss | Director | 1 Jan 2017 | 29 Apr 2022 | British | 66 years |
| William John Romaine Govett | Director | 30 May 1992 | 16 May 1996 | British | 88 years |