| Abigail Victoria Harding | Director | 16 Aug 2019 | 28 Apr 2022 | British | 36 years |
| Agnes Christina Lynch | Director | 10 Jun 2002 | 6 Sept 2005 | British | 59 years |
| Alan George Scott | Director | 6 Sept 2005 | 31 Mar 2012 | British | 76 years |
| Alan Malcolm Rainer | Secretary | 12 Nov 2001 | 28 May 2021 | British | - |
| Alberto Buffa | Director | 2 Mar 2015 | 9 Dec 2016 | Italian | 41 years |
| Andrew Christopher Wood | Director | 10 Mar 2000 | 5 Sept 2005 | British | 79 years |
| Carol Gear | Director | 8 Oct 1992 | 17 Feb 1995 | British | 68 years |
| Christina Bridget Ryan | Director | 17 Jul 1998 | 31 Mar 2025 | Irish | 66 years |
| Christina Bridget Ryan | Secretary | 12 Jul 1993 | 21 Nov 1995 | Irish | - |
| Christina Bridget Ryan | Secretary | 3 Mar 1997 | 17 Jul 1998 | Irish | - |
| Craig Ian Machell | Director | 24 Feb 2014 | 26 Jan 2017 | British | 40 years |
| David Borthwick | Director | 28 Feb 2000 | 16 Nov 2001 | British | 86 years |
| David Hywel Sanger | Director | 8 Oct 1992 | 21 Nov 1995 | British | 68 years |
| David Hywel Sanger | Director | 17 Jul 1998 | 22 Jun 2000 | British | 68 years |
| David Paul Wenham | Secretary | 17 Jul 1998 | 11 Jan 2002 | British | - |
| Dowglass Charles Cardale | Director | 20 Dec 1995 | 5 Apr 2002 | British | 79 years |
| Esther Patricia Curran | Secretary | 17 Jul 1998 | 22 Jan 1999 | British | - |
| Esther Patricia Curran | Secretary | 9 Nov 1999 | 11 Jan 2002 | British | - |
| Francis John O'mahony | Director | 13 Feb 2008 | 23 Jul 2018 | British | 65 years |
| Gareth James Bartman | Director | 9 Nov 1999 | 10 Nov 2000 | British | 51 years |
| Gillian Jean Palmer | Director | 9 Nov 1999 | 31 Oct 2001 | British | 71 years |
| Glyn Parry | Director | 8 May 2002 | 30 Jul 2014 | British | 59 years |
| Heather Gwendolyn Brierley | Director | 1 Feb 2001 | 16 Aug 2019 | British | 55 years |
| Helen Louise Ashton | Director | 12 Nov 2001 | 27 Mar 2012 | British | 64 years |
| Hope Hannah Mcfarlane-edmond | Director | 19 Oct 2023 | 30 Sept 2025 | British | 33 years |
| John Christopher Challis | Director | 21 Nov 1995 | 12 Jan 1998 | British | 73 years |
| John Christopher Challis | Director | 6 Sept 2005 | 31 Mar 2011 | British | 73 years |
| Jon Robert Burch | Director | 30 Nov 2022 | 19 Oct 2023 | British | 32 years |
| Judith Sasse | Director | 1 Nov 2006 | 1 Jul 2010 | German | 51 years |
| Kate Jowett-baker | Director | 4 Aug 2010 | 7 Nov 2011 | British | 42 years |
| Katherine Ann Walker | Director | 21 Nov 1995 | 12 Jul 2002 | British | 75 years |
| Katherine Mary Duffy | Director | 22 Feb 1995 | 25 Sept 1995 | British | 81 years |
| Katherine Mary Duffy | Director | 21 Nov 1995 | 31 Jul 2000 | British | 81 years |
| Kathryn Alice Zielinski | Director | 7 Dec 2017 | 30 Nov 2022 | British | 36 years |
| Kathryn Silverwood | Director | 1 Feb 2001 | 11 Jan 2002 | British | 59 years |
| Louise Alison Clare Blackwell | Director | 4 Sept 2008 | 14 Oct 2013 | British | 44 years |
| Louise Alison Clare Blackwell | Director | 30 Jul 2014 | 11 Nov 2019 | British | 44 years |
| Mark Philip David Stevens | Director | 1 Nov 2006 | 22 Feb 2008 | British | 52 years |
| Michael John Cole | Director | 30 Mar 2009 | 28 Feb 2014 | British | 56 years |
| Michael Joseph Mohun | Director | 1 Jun 2017 | 4 Oct 2019 | Australian | 36 years |
| Nicholas John Eldred | Director | 29 Sept 2000 | 13 Jul 2001 | British | 63 years |
| Patricia Mary Day | Director | 15 Feb 2008 | 12 Jan 2011 | English | 73 years |
| Paula Annette Walsh | Director | 17 Jul 1998 | 30 Apr 2004 | British | 61 years |
| Paula Annette Walsh | Secretary | 24 May 1994 | 21 Nov 1995 | British | - |
| Philip Norman Allenby | Director | 1 Jul 2010 | 22 Aug 2017 | British | 66 years |
| Richard David Price | Secretary | 8 Oct 1992 | 18 Jun 1993 | British | - |
| Robert John Harwood | Director | 12 Jan 1998 | 17 Nov 2001 | British | 66 years |
| Robert Murray Duncan | Director | 14 Aug 2002 | 27 Aug 2002 | British | 60 years |
| Roy Leslie Tooley | Director | 19 Jul 2012 | 5 Feb 2016 | British | - |
| Stephen John Prior | Director | 21 Nov 1995 | 6 Sept 2005 | British | 73 years |
| Tanuja Shah | Secretary | 22 Jan 1999 | 31 Mar 2009 | British | - |
| Tomas Gerard Cahalane | Director | 25 Sept 1995 | 21 Nov 1995 | British | 61 years |
| Tomas Gerard Cahalane | Secretary | 21 Nov 1995 | 3 Mar 1997 | British | - |
| Vivienne Ann Haynes | Director | 3 Mar 2010 | 18 Dec 2015 | British | 68 years |
| William Paton Stringer | Director | 1 Apr 2005 | 19 Mar 2007 | British | 69 years |