| Abigail Victoria Harding | Director | 23 Sept 2019 | 24 Jan 2020 | British | 36 years |
| Agnes Christina Lynch | Director | 7 May 2003 | 6 Sept 2005 | British | 59 years |
| Alan David White | Director | 17 Mar 1995 | 16 Nov 2001 | British | 81 years |
| Alan George Scott | Director | 26 Nov 2003 | 30 Mar 2009 | British | 76 years |
| Alberto Buffa | Director | 18 May 2015 | 9 Dec 2016 | Italian | 41 years |
| Antony John Gara | Director | 23 Sept 2019 | 15 Apr 2025 | British | 52 years |
| Christina Bridget Ryan | Director | 1 Jul 2010 | 31 Mar 2025 | Irish | 66 years |
| Colin Raymond Green | Director | 17 Mar 1995 | 1 Sept 1999 | British | 77 years |
| Colin Shaw | Director | 8 Oct 1992 | 6 Nov 1992 | British | 76 years |
| David Harrison | Director | 8 Oct 1992 | 22 Feb 1995 | British | 74 years |
| David Hywel Sanger | Secretary | 8 Oct 1992 | 21 Mar 1995 | British | - |
| Elaine Ruth Hewitt | Director | 14 Sept 2006 | 4 Apr 2012 | British | 62 years |
| Geoffrey William Almeida | Director | 17 Mar 1995 | 1 Feb 2002 | British | 75 years |
| Graeme Richard William Hunter | Director | 16 Jan 2001 | 7 Feb 2002 | British | 63 years |
| Heather Gwendolyn Brierley | Director | 19 Dec 2002 | 30 Mar 2009 | British | 55 years |
| Helen Louise Ashton | Director | 30 Mar 2009 | 1 Jul 2010 | British | 64 years |
| Hope Hannah Mcfarlane-edmond | Director | 25 Sept 2024 | 15 Apr 2025 | British | 33 years |
| Ian Andrew Wright | Director | 17 Nov 1992 | 14 Dec 1993 | British | 71 years |
| Ian Charles Jones | Director | 8 May 2002 | 7 May 2003 | British | 64 years |
| James D'sylva | Director | 4 Apr 1997 | 14 Apr 1997 | British | 67 years |
| James D'sylva | Director | 27 May 1997 | 2 Jun 1997 | British | 67 years |
| James D'sylva | Director | 18 Aug 1997 | 29 Aug 1997 | British | 67 years |
| John Christopher Challis | Director | 6 Sept 2005 | 31 Mar 2011 | British | 73 years |
| John Ronald Pike | Director | 16 Oct 1995 | 19 Mar 2004 | British | 77 years |
| John Stephen Allkins | Director | 8 Oct 1992 | 17 Mar 1995 | British | 77 years |
| Judith Sasse | Director | 30 Mar 2009 | 1 Jul 2010 | German | 51 years |
| Katherine Mary Duffy | Secretary | 8 Oct 1992 | 16 Jan 1996 | British | - |
| Louise Alison Clare Blackwell | Director | 1 Jul 2010 | 14 Oct 2013 | British | 44 years |
| Louise Alison Clare Blackwell | Director | 16 May 2016 | 18 Jan 2018 | British | 44 years |
| Lynda Margaret Shillaw | Director | 19 Mar 2004 | 7 Jun 2006 | British | 61 years |
| Michael John Cole | Director | 16 Oct 2013 | 28 Feb 2014 | British | 56 years |
| Michael Joseph Mohun | Director | 1 Jun 2017 | 4 Oct 2019 | Australian | 36 years |
| Philip Norman Allenby | Director | 24 Feb 2014 | 18 May 2015 | British | 66 years |
| Richard William Savage | Director | 22 Feb 1995 | 30 Jun 1995 | British | 76 years |
| Robert Paul Brace | Director | 17 Mar 1995 | 23 Nov 2000 | British | 76 years |
| Shelley Francine Grey | Director | 1 Sept 1999 | 8 May 2002 | British | 74 years |
| Stephen John Prior | Director | 8 May 2002 | 6 Sept 2005 | British | 73 years |
| William Paton Stringer | Director | 6 Sept 2005 | 19 Mar 2007 | British | 69 years |