| Alison Marie Rose-slade | Director | 1 Oct 2015 | 6 Mar 2016 | British | 56 years |
| Andrew Charles Fisher | Director | 12 Jun 2000 | 28 Feb 2002 | British | 64 years |
| Andrew Richard Kyle | Director | 21 Feb 2019 | 1 Aug 2023 | British | 45 years |
| Bernard Philip Horn | Director | 4 May 1992 | 14 Nov 1994 | British | 79 years |
| Brian Hartzer | Director | 25 Oct 2010 | 15 Jun 2012 | Us Citizen | 58 years |
| Brian John Crowe | Director | 16 Aug 2004 | 3 Jun 2008 | British | 68 years |
| Brian Martin Mulholland | Director | 23 Feb 2015 | 22 Aug 2016 | British | 51 years |
| Cameron Ian Mcphail | Director | 6 Mar 2000 | 25 Mar 2002 | British | 71 years |
| Carel Maurits Mosselmans | Director | 4 May 1992 | 22 May 1995 | British | 96 years |
| Christopher David Middleton | Director | 5 Apr 2002 | 29 Nov 2002 | British | 65 years |
| Christopher Malcolm Horne | Secretary | 4 May 1992 | 26 Sept 1996 | British | - |
| David Alexander Cospatrick Home | Director | 6 Apr 1999 | 31 Dec 2013 | British | 82 years |
| David Burdett Money-coutts | Director | 4 May 1992 | 21 May 1996 | British | 94 years |
| David Cameron Macdonald | Director | 4 May 1992 | 22 May 1995 | British | 89 years |
| David Went | Director | 22 Jul 1994 | 1 Nov 1997 | Irish | 78 years |
| Denis Marsden Child | Director | 4 May 1992 | 24 Apr 1997 | British | 99 years |
| Douglas Richard Hurd | Director | 20 May 1998 | 31 Dec 2009 | British | 95 years |
| Ewen Alastair John Fergusson | Director | 28 May 1993 | 1 Jun 1999 | British | 93 years |
| Fiona Mary Mackay | Secretary | 12 Sept 2016 | 5 Dec 2018 | - | - |
| Francesca Barnes | Director | 1 Nov 2012 | 31 Oct 2021 | British | 67 years |
| Frederick Anderson Goodwin | Director | 11 Jul 2001 | 31 Dec 2007 | British | 67 years |
| Gavin Christopher Frost | Director | 19 May 2011 | 31 Dec 2013 | British | 52 years |
| Gerald Anthony Davies | Director | 4 May 1992 | 31 Dec 1992 | British | 90 years |
| Gloria Jayne Glennie | Secretary | 29 Sept 1998 | 1 Jun 1999 | British | - |
| Glyn Parry Jones | Director | 30 Oct 1997 | 3 Jul 2000 | British | 73 years |
| Gordon Francis Pell | Director | 11 Jul 2001 | 31 Dec 2011 | British | 75 years |
| Herschel Post | Director | 1 Jul 1995 | 14 Jul 2000 | British And American | 86 years |
| Ian Nicol Tegner | Director | 26 Jan 1996 | 20 May 1998 | British | 92 years |
| Ian Ross Farnsworth | Director | 4 May 1992 | 30 Jun 1995 | British | 87 years |
| Ian Ross Farnsworth | Director | 1 Oct 1995 | 29 Jan 1997 | British | 87 years |
| James Hedley Rawlingson | Director | 14 Jan 2008 | 1 Jul 2011 | British | 58 years |
| Jean Pierre Cuoni | Director | 28 May 1993 | 10 Oct 1994 | Swiss | 88 years |
| John Alexander Williamson | Director | 5 Feb 2001 | 30 Apr 2002 | British | 63 years |
| John Duncan Baines | Director | 21 Jul 2003 | 28 Feb 2010 | British | 63 years |
| John Smith | Director | 4 May 1992 | 28 May 1993 | British | 102 years |
| Kathryn Anne Winup | Director | 15 Feb 2006 | 31 Dec 2007 | British | 55 years |
| Linda Hamilton Urquhart | Director | 11 Jul 2017 | 18 Jul 2025 | British | 66 years |
| Marie Claire Baird | Director | 5 Dec 2018 | 21 May 2019 | Irish | 52 years |
| Mark Elliott | Secretary | 19 Mar 2021 | 18 Oct 2024 | - | - |
| Mark Hebberton Sheldon | Director | 26 Jan 1996 | 20 May 1998 | British | 94 years |
| Matthew Edward James Waymark | Director | 9 Mar 2020 | 9 Mar 2023 | British | 50 years |
| Michael Albemarle Bowes Lyon | Director | 4 May 1992 | 28 May 1993 | British | 85 years |
| Michael John Morley | Director | 14 Aug 2009 | 6 Mar 2016 | British | 68 years |
| Michael Robert Regan | Director | 8 Nov 2016 | 31 Jan 2019 | British | 46 years |
| Mohammad Kamal Syed | Director | 27 Jul 2023 | 8 Aug 2024 | British | 62 years |
| Nicholas Assheton | Director | 4 May 1992 | 23 May 1999 | British | 91 years |
| Nicholas Guy Pollard | Director | 15 Feb 2006 | 31 Aug 2009 | British | 64 years |
| Nicholas Rory Tapner | Director | 25 Oct 2010 | 31 Mar 2015 | British | 66 years |
| Paul Myners | Director | 20 May 1998 | 6 Mar 2000 | British | 77 years |
| Peter Gordon Flavel | Director | 4 Mar 2016 | 27 Jul 2023 | Australian | 65 years |
| Philip John Remnant | Director | 30 Sept 2022 | 30 Sept 2025 | British | 71 years |
| Ralph Antoine Ricks | Secretary | 5 Dec 2018 | 19 Mar 2021 | - | - |
| Robert Earl Stemmons | Secretary | 26 Sept 1996 | 30 Jul 1997 | Usa | - |
| Roger Flemington | Director | 4 May 1992 | 13 Sept 1994 | British | 93 years |
| Ruth Nicholson | Secretary | 1 Jun 1999 | 13 Mar 2000 | British | - |
| Sally Anne Doyle | Secretary | 13 Mar 2000 | 12 Sept 2016 | British | - |
| Samantha Helen Linsley | Secretary | 30 Jul 1997 | 30 Sept 1998 | British | - |
| Sarah Jane Deaves | Director | 20 Nov 2002 | 1 Jul 2009 | British | 64 years |
| Siobhan Geraldine Boylan | Director | 1 Sept 2023 | 18 Jul 2025 | Irish | 56 years |
| Stuart Walter Marshall | Director | 4 May 1992 | 31 Mar 1993 | British | 90 years |
| Werner Hans Peyer | Director | 14 Jul 2000 | 11 Jan 2002 | Switzerland | 71 years |
| William Arthur Waldegrave | Director | 3 Dec 2012 | 1 Jan 2023 | British | 79 years |
| Yvette Monica Newbold | Director | 22 Jul 1994 | 20 May 1998 | British | 85 years |