| Akira Suzuki | Director | 14 Aug 2017 | 29 May 2018 | Japanese | 67 years |
| Alexander Maxwell Crombie | Director | 18 May 2006 | 31 Dec 2009 | British | 77 years |
| Alexander Peter Watt | Director | 18 May 2006 | 15 Nov 2010 | British | 74 years |
| Carolyn Cathleen Raffaeli | Director | 1 Aug 2018 | 19 Dec 2019 | American | 70 years |
| Cecilia Reyes Leuzinger | Director | 1 Oct 2019 | 19 Dec 2019 | Swiss,filipino | 67 years |
| Colin Alexander Mason Buchan | Director | 18 May 2006 | 1 Jan 2012 | British | 72 years |
| Colin Martin Clark | Director | 18 May 2006 | 14 Aug 2017 | British | 67 years |
| Colin Richard Walklin | Director | 3 Dec 2007 | 14 Aug 2017 | British | 72 years |
| David John Burns | Secretary | 1 Jul 2010 | 4 Apr 2017 | - | - |
| David Thomas Nish | Director | 1 Jan 2010 | 5 Aug 2015 | British | 66 years |
| David Thorburn Cumming | Director | 18 May 2006 | 1 Jan 2012 | British | 65 years |
| Douglas Jardine Flint | Director | 1 Nov 2018 | 19 Dec 2019 | British | 71 years |
| Gerald Edgar Grimstone | Director | 3 May 2013 | 28 Apr 2015 | British | 77 years |
| Gerald Edgar Grimstone | Director | 14 Aug 2017 | 31 Dec 2018 | British | 77 years |
| Gerhard Wilhelm Fusenig | Director | 14 Aug 2017 | 31 Dec 2018 | German | 63 years |
| Gerrard Patrick Rocchi | Director | 1 Mar 2014 | 31 Aug 2016 | Canadian | 69 years |
| Hilary Anne Staples | Director | 15 Aug 2022 | 27 Jun 2025 | British | 55 years |
| Holly Sylvia Kidd | Secretary | 4 Apr 2017 | 10 Dec 2020 | - | - |
| Hugh Alexander Stevenson | Director | 18 May 2006 | 19 May 2008 | United Kingdom | 84 years |
| John Devine | Director | 14 Aug 2017 | 19 Dec 2019 | British | 68 years |
| John Devine | Director | 25 Sept 2012 | 31 Aug 2016 | British | 68 years |
| John Dingwall Maxwell | Director | 18 May 2006 | 15 Dec 2006 | British | 63 years |
| John Gregor Hugh Paynter | Director | 1 Dec 2010 | 28 Apr 2015 | British | 72 years |
| Jonathan Donald Sherlock Dawson | Director | 1 Dec 2010 | 28 Feb 2013 | British | 74 years |
| Jonathan Paul Asquith | Director | 1 Sept 2019 | 19 Dec 2019 | British | 70 years |
| Julie Chakraverty | Director | 14 Aug 2017 | 29 May 2018 | British | 55 years |
| Jutta Grevinde Af Rosenborg | Director | 14 Aug 2017 | 19 Dec 2019 | Danish | 68 years |
| Kenneth Arthur Gilmour | Director | 10 Dec 2020 | 30 Sept 2022 | British | 63 years |
| Kevin Allen Huw Parry | Director | 14 Aug 2017 | 31 Dec 2018 | British | 64 years |
| Lynne Margaret Peacock | Director | 14 Aug 2017 | 29 May 2018 | British | 73 years |
| Mark Connolly | Director | 18 May 2006 | 15 Mar 2009 | British | 67 years |
| Martin James Gilbert | Director | 14 Aug 2017 | 12 May 2020 | British | 71 years |
| Martinclair Pike | Director | 14 Aug 2017 | 19 Dec 2019 | British | 65 years |
| Melanie Gee | Director | 14 Aug 2017 | 19 Dec 2019 | British | 65 years |
| Norman Keith Skeoch | Director | 18 May 2006 | 1 Sept 2020 | British | 70 years |
| Patrick David Bartlett | Director | 10 Dec 2020 | 5 Apr 2023 | British | 59 years |
| Paul Bernard Mckenna | Director | 10 Dec 2020 | 31 May 2025 | British | 62 years |
| Richard Stephen Mully | Director | 14 Aug 2017 | 14 May 2019 | British | 65 years |
| Roderick Louis Paris | Director | 18 May 2006 | 10 Dec 2020 | British | 67 years |
| Roger Andre Renaud | Director | 18 May 2006 | 1 Jan 2012 | Canadian | 66 years |
| Simon Richard Vivian Troughton | Director | 14 Aug 2017 | 14 May 2019 | British | 73 years |
| Stephanie Jane Bruce | Director | 1 Jun 2019 | 10 Dec 2020 | British | 58 years |
| Suchita Vijaychandra Patel | Director | 19 Apr 2023 | 28 Feb 2024 | British | 56 years |
| Vincent Joseph O'brien | Director | 3 Mar 2006 | 17 May 2006 | British | 61 years |
| Vincent Joseph O'brien | Secretary | 3 Mar 2006 | 1 Jul 2010 | British | - |
| Virginia Anne Holmes | Director | 24 Oct 2008 | 31 Aug 2016 | British | 66 years |
| William John Rattray | Director | 14 Aug 2017 | 31 May 2019 | British | 68 years |
| William Regnar Littleboy | Director | 3 Mar 2006 | 1 Jan 2012 | British | 65 years |
