| Anders Ekblom | Director | 20 Jul 2009 | 15 Jul 2011 | Swedish | 71 years |
| Andrew Leonard Smith | Director | 16 Dec 1994 | 13 Dec 1995 | British | 76 years |
| Andrew Philip Witty | Director | 25 Oct 2005 | 31 Mar 2017 | British | 61 years |
| Bradley Andrew Joseph Wilson | Director | 13 Dec 1995 | 13 Sept 1996 | British | 78 years |
| Cedric Annesley Scroggs | Director | 26 Jun 1992 | 13 Dec 1993 | British | 84 years |
| Charles James Attridge | Director | 1 Jan 1997 | 1 Feb 1999 | British | 85 years |
| Charles James Attridge | Secretary | 1 Jan 1997 | 31 Jan 1999 | British | - |
| Christopher Strutt | Director | 1 Feb 1999 | 20 Jun 2001 | British | 66 years |
| Christopher Strutt | Secretary | 1 Feb 1999 | 20 Jun 2001 | British | - |
| David Friend | Director | 10 Sept 1991 | 1 Jul 1994 | British | 91 years |
| David Godfrey | Director | 10 Sept 1991 | 26 Jun 1992 | British | 96 years |
| David Richard Brennan | Director | 1 Jan 2006 | 1 Jun 2012 | American | 72 years |
| Edgar William Stanford | Director | 10 Sept 1991 | 31 Dec 1996 | British | 89 years |
| Edgar William Stanford | Secretary | 10 Sept 1991 | 31 Dec 1996 | British | - |
| Edward James Gray | Director | 20 Oct 2008 | 1 Feb 2013 | British | 66 years |
| Eric Edward Cliffe | Director | 10 Sept 1991 | 1 Jul 1992 | British | 93 years |
| Ernest Mario | Director | 10 Sept 1991 | 11 Mar 1993 | American | 87 years |
| Franz Bernhard Humer | Director | 9 Jun 1993 | 13 Jul 1994 | Swiss | 79 years |
| Geoffrey Peter Fothergill | Director | 10 Sept 1991 | 26 Jun 1992 | British | 80 years |
| Gordon Ridley Solway | Director | 1 Jul 1992 | 31 Dec 1994 | British | 89 years |
| James Anderson | Director | 29 Feb 2016 | 15 Jan 2021 | British | 53 years |
| James Michael Thomas Cochrane | Director | 26 Jun 1992 | 31 Dec 1994 | British | 81 years |
| Jan Leschly | Director | 10 Sept 1991 | 20 Apr 2000 | Danish | 85 years |
| Jean Pierre Garnier | Director | 1 Nov 1999 | 31 May 2008 | French | 78 years |
| John Peter Marshall Cooke | Director | 20 May 2002 | 31 Dec 2004 | British | 66 years |
| John Peter Marshall Cooke | Secretary | 20 May 2002 | 31 Dec 2004 | British | - |
| John Richard Farrant | Director | 10 Sept 1991 | 11 Mar 1992 | British | 97 years |
| John Simon Patterson | Director | 13 Dec 1995 | 31 Mar 2009 | British | 77 years |
| John Weddell Robb | Director | 10 Sept 1991 | 31 Dec 1994 | British | 89 years |
| Keith Robert Whitesides | Director | 10 Sept 1991 | 31 Dec 1994 | British | 82 years |
| Menelas Nicolas Pangalos | Director | 15 Jul 2011 | 28 Mar 2024 | British | 58 years |
| Michael Redmond | Director | 26 Jun 1992 | 31 Dec 1995 | British | 81 years |
| Pascal Claude Roland Soriot | Director | 1 Sept 2013 | 4 Apr 2025 | French | 66 years |
| Patrick John Thompson Vallance | Director | 1 Sept 2013 | 31 Mar 2018 | British | 65 years |
| Philip David Miller | Secretary | 30 Aug 2005 | 25 Aug 2006 | British | - |
| Ramneek Kaur Mahal | Director | 1 Jun 2022 | 16 Jun 2023 | British | 51 years |
| Richard Brook Sykes | Director | 13 Jul 1994 | 20 May 2002 | British | 83 years |
| Richard De Souza | Director | 12 Dec 1996 | 9 Jul 1999 | British | 68 years |
| Rudi Dobber | Director | 9 Apr 2024 | 6 May 2025 | Dutch | 61 years |
| Sean Patrick Lance | Director | 11 Mar 1992 | 12 Mar 1997 | Irish | 78 years |
| Sidney Stewart Siddall | Director | 10 Sept 1991 | 16 Dec 1994 | British | 89 years |
| Simon David Haigh Sargent | Director | 20 Jun 2001 | 20 May 2002 | British | 72 years |
| Simon David Haigh Sargent | Secretary | 20 Jun 2001 | 20 May 2002 | British | - |
| Simon Jonathan Lowth | Director | 13 Jul 2012 | 1 Sept 2013 | British | 64 years |
| Stuart Michael Wallis | Director | 16 Dec 1994 | 31 Dec 1995 | British | 80 years |
| Sue Middleton | Director | 31 Dec 2004 | 6 Dec 2021 | British | 61 years |
| Sue Middleton | Secretary | 31 Dec 2004 | 30 Aug 2005 | British | - |
| Thomas Fulton Wilson Mckillop | Director | 1 Jul 1994 | 31 Dec 2005 | British | 82 years |
| Till Medinger | Director | 10 Sept 1991 | 13 Dec 1995 | German | 85 years |