| Angelien Kemna | Director | 7 Jan 2015 | 1 Jan 2019 | Dutch | 69 years |
| Brendan Dominick Reville | Director | 20 Jul 2004 | 12 Feb 2008 | British | 64 years |
| Carl Sigmund Bang | Director | 12 Feb 2019 | 11 Jul 2021 | Canadian | 64 years |
| Charles Richard Browne Goldson | Director | 3 Feb 2015 | 31 Dec 2016 | British | 77 years |
| Christine Susan Kernoghan | Director | 2 Jul 2021 | 6 Jul 2022 | British | 68 years |
| Christopher John Hitchen | Director | 2 Nov 1998 | 31 Dec 2017 | British | 61 years |
| Cyril Francis Johnson | Director | 1 Oct 2004 | 30 Jan 2014 | British | 68 years |
| David Harry Adams | Director | 25 Jun 1991 | 5 Apr 1997 | British | 87 years |
| David Maddison | Director | 13 Jun 2005 | 31 Dec 2007 | British | 62 years |
| David Matthew Teasdale | Director | 27 Sept 2010 | 30 Jan 2014 | British | 63 years |
| Francis Edward Curtiss | Secretary | 25 Jun 1991 | 12 Jul 1995 | British | - |
| Gerard Doherty | Director | 2 Jul 2021 | 1 Aug 2023 | British | 73 years |
| James Alexander Mckinnell | Director | 1 Oct 1994 | 17 May 2003 | British | 85 years |
| Johanna Kate Kyrklund | Director | 7 Mar 2019 | 2 Jul 2021 | British | 50 years |
| John David Chilman | Director | 4 Feb 2014 | 31 Dec 2014 | British | 59 years |
| John David Chilman | Director | 7 Feb 2017 | 31 Oct 2017 | British | 59 years |
| John David Chilman | Director | 14 Jun 2019 | 7 Oct 2024 | British | 59 years |
| John Hilton Mayfield | Director | 6 Feb 2014 | 31 Mar 2020 | British | 89 years |
| Karl Stephen Sternberg | Director | 8 Sept 2014 | 31 Dec 2019 | British | 57 years |
| Kathryn Isabel Mary Long | Director | 23 Jan 1996 | 6 Apr 1998 | British | 65 years |
| Lisa Melanie Sunner | Director | 7 May 2013 | 30 Jan 2014 | British | 57 years |
| Lisa Melanie Sunner | Secretary | 12 Jul 1995 | 26 May 2022 | British | - |
| Malcolm James Gray | Director | 1 Nov 1991 | 1 Oct 2004 | British | 82 years |
| Maura Sullivan | Director | 1 Apr 2022 | 31 Dec 2023 | British | 60 years |
| Maura Sullivan | Director | 14 Mar 2024 | 31 Jul 2024 | British | 60 years |
| Meliha Duymaz Oludipe | Director | 27 Nov 2017 | 27 Nov 2020 | British | 48 years |
| Michael Goy | Director | 24 Feb 1997 | 31 Dec 2007 | British | 74 years |
| Michael Goy | Director | 24 Apr 2008 | 7 Oct 2008 | British | 74 years |
| Peter Anthony Murray | Director | 1 May 1997 | 19 May 2004 | British | 84 years |
| Peter William Stanyer | Director | 25 Jun 1991 | 6 Oct 1995 | British | 70 years |
| Peter William Stanyer | Director | 10 Mar 2008 | 30 Sept 2015 | British | 70 years |
| Philip Craig Willcock | Director | 1 Feb 2018 | 28 Feb 2019 | British | 55 years |
| Richard Andrew Murray | Director | 1 Jan 2021 | 2 Jul 2021 | British | 53 years |
| Richard Edward Jones | Director | 2 Jul 2021 | 31 Dec 2023 | British | 60 years |
| Stephen Charles Kairis | Director | 20 Jul 2004 | 31 Dec 2007 | British | 76 years |
| Stephen Paul Trickett | Director | 1 May 2013 | 20 May 2020 | British | 69 years |
| Stuart Blackett | Director | 30 Jul 2021 | 8 Jan 2024 | British | 51 years |
| Susan Adeane | Director | 25 Jun 1991 | 31 Dec 2007 | British | 67 years |