| Alan Charles Lovell | Director | 29 Apr 2019 | 31 Jul 2019 | British | 73 years |
| Alan Jack Cole | Director | 10 Mar 2000 | 2 Nov 2000 | British | 84 years |
| Alejandro Veramendi | Director | 24 Nov 2021 | 30 Dec 2022 | Spanish | 53 years |
| Alexander David Gemmill | Director | 29 Apr 1996 | 16 May 2002 | British | 85 years |
| Alfredo Garcia | Director | 10 Jul 2008 | 24 Nov 2021 | Spanish | 55 years |
| Amanda Lucia Fisher | Director | 22 Jan 2020 | 30 Dec 2022 | British | 63 years |
| Andres Camacho Donezar | Director | 21 May 2014 | 25 Mar 2020 | Spanish | 50 years |
| Andrew Lee Milner | Director | 19 Feb 2016 | 12 Dec 2019 | British | 57 years |
| Ann Elizabeth Mantz | Secretary | 1 Jan 1996 | 4 Feb 2000 | British | - |
| Austen Patrick Brown | Director | 31 Mar 2004 | 30 Jun 2008 | British | 86 years |
| Brian Lynn Staples | Director | 17 Nov 1997 | 28 Feb 2003 | British | 81 years |
| Carol Hui | Director | 1 Jan 2004 | 15 Mar 2009 | British | 70 years |
| Carol Hui | Director | 26 Jan 2017 | 28 Mar 2019 | British | 70 years |
| Carol Hui | Secretary | 18 Sept 2000 | 15 Mar 2009 | British | - |
| Charles Michael Mogg | Director | 14 Jan 2000 | 3 Sept 2003 | British | 81 years |
| Christopher Charles Webster | Director | 26 Jan 2006 | 11 Apr 2010 | British | 68 years |
| David Alwyn Cawthorne | Director | 4 May 1991 | 7 May 1997 | British | 82 years |
| David Alwyn Cawthorne | Secretary | 4 May 1991 | 1 Jan 1996 | British | - |
| David John Miller | Director | 2 Nov 1998 | 10 Sept 2002 | British | 64 years |
| Donald Andrew Holland | Director | 4 May 1991 | 12 May 1999 | British | 102 years |
| Edmund Alec King | Director | 4 May 1991 | 13 Feb 1998 | British | 90 years |
| Elena Fernandez Rodriguez | Director | 24 Nov 2021 | 30 Dec 2022 | Spanish | 60 years |
| Fernando Gonzalez De Canales Moyano | Director | 29 Apr 2016 | 29 Apr 2016 | Spanish | 61 years |
| Fernando Gonzalez De Canales Moyano | Director | 29 Apr 2016 | 24 Nov 2021 | Spanish | 61 years |
| Fidel Lopez Soria | Director | 6 Jun 2018 | 24 Nov 2021 | Spanish | 59 years |
| Fidel Lopez-soria | Director | 2 Oct 2007 | 18 Apr 2011 | Spanish | 59 years |
| Gerard Joseph Mccormack | Director | 9 Dec 1996 | 23 Oct 1998 | British | 74 years |
| Gonzalo Nieto Mier | Director | 9 Dec 2020 | 30 Dec 2022 | Spanish | 52 years |
| Gordon Francis De Courcy Page | Director | 12 Nov 2001 | 29 May 2003 | British | 83 years |
| Ian Paul Tyler | Director | 1 Jan 2018 | 30 Dec 2022 | British | 66 years |
| Ian Robinson | Director | 7 Feb 2001 | 31 Dec 2003 | British | 84 years |
| Inigo Jodra Uriate | Director | 18 Apr 2011 | 21 May 2014 | Spanish | 60 years |
| Inigo Meiras | Director | 29 May 2003 | 29 Nov 2007 | Spanish | 63 years |
| Jaime Aguirre De Carcer Moreno | Director | 16 Dec 2003 | 31 Dec 2015 | Spanish | 75 years |
| Javier Galindo | Director | 24 Nov 2021 | 20 Jun 2022 | Spanish | 65 years |
| Javier Romero Sulla | Director | 13 Jul 2005 | 1 Jul 2008 | Spanish | 66 years |
| John Alan Napier | Director | 25 Mar 1999 | 30 Sept 1999 | British | 84 years |
| John Anthony Biles | Director | 19 Jun 2001 | 29 May 2003 | British | 79 years |
| John Edward Michael Douglas Whiteman | Director | 2 Apr 2001 | 2 Aug 2001 | British | 72 years |
| John Haggitt Charles Patten | Director | 1 Dec 1999 | 29 May 2003 | British | 81 years |
| John Hamilton Robinson | Director | 17 Mar 2000 | 30 Sept 2002 | American | 76 years |
| John Richard Tetlow | Secretary | 9 Feb 2000 | 18 Sept 2000 | British | - |
| John Thomas Snook | Director | 4 May 1991 | 11 May 1995 | British | 72 years |
| Jordan Lawrie | Director | 30 Dec 2022 | 30 Dec 2022 | American | 38 years |
| Jose Leo | Director | 29 May 2003 | 22 Sept 2006 | Spanish | 66 years |
| Jose-maria Perez Tremps | Director | 29 May 2003 | 13 Jul 2005 | Spanish | 74 years |
| Juan Perez Arguedas | Director | 31 Mar 2020 | 30 Sept 2020 | Spanish | 43 years |
| Melvyn Ewell | Director | 1 Sept 2001 | 31 Mar 2016 | British | 68 years |
| Michael Arthur Kayser | Director | 11 Sept 2002 | 15 Oct 2002 | British | 71 years |
| Michael Pilbeam | Director | 2 Nov 1998 | 28 Feb 2001 | British | 77 years |
| Neil Ashley | Director | 4 May 1991 | 9 May 2001 | British | 90 years |
| Nicolas Villen | Director | 29 May 2003 | 30 Nov 2012 | Spanish | 77 years |
| Peter John Forbes | Director | 25 Mar 1996 | 4 Aug 1997 | British | 83 years |
| Richard Clive Mottram | Director | 19 Aug 2008 | 31 Dec 2017 | British | 80 years |
| Richard Colin Douglas | Director | 4 May 1991 | 8 May 1996 | British | 87 years |
| Richard William Entwistle | Director | 4 Aug 1997 | 30 Jun 2005 | British | 73 years |
| Robert Charles Osborne | Director | 9 Feb 2000 | 19 Jul 2002 | British | 65 years |
| Santiago Olivares | Director | 29 May 2003 | 1 Jun 2018 | Spanish | 59 years |
| Trevor William West | Director | 1 Nov 1994 | 12 May 1999 | British | 87 years |
| Wayne Anthony Robertson | Secretary | 16 Mar 2009 | 28 Apr 2017 | British | - |
| William Anthony Lucas | Director | 1 Jan 1993 | 31 Jan 2000 | British | 85 years |