| Adam Gordon Begg | Director | 10 Oct 2022 | 2 May 2025 | Australian | 54 years |
| Adrian James Henry Ewer | Director | 25 Apr 2013 | 19 Jan 2022 | British | 73 years |
| Andrew James Allner | Director | 24 Oct 2008 | 31 Oct 2019 | British | 73 years |
| Austen Patrick Brown | Director | 26 Jan 1999 | 24 Apr 2013 | British | 86 years |
| Christian Schreyer | Director | 1 Nov 2021 | 31 Oct 2023 | German | 58 years |
| Christopher Douglas Collins | Director | 1 Sept 1999 | 23 Oct 2008 | British | 86 years |
| Christopher Moyes | Director | 19 Oct 1991 | 8 Jul 2006 | British | 77 years |
| Clare Margaret Hollingsworth | Director | 1 Aug 2019 | 31 Dec 2023 | British | 66 years |
| David Allen Brown | Director | 1 Apr 2011 | 5 Nov 2021 | British | 66 years |
| David Charles Blackwood | Director | 1 Jan 2022 | 10 Oct 2022 | British, | 67 years |
| Dominic Joseph Lavelle | Director | 1 Jan 2022 | 31 Aug 2024 | British | 63 years |
| Douglas Jamieson Adie | Director | 5 Sept 1995 | 13 Mar 1997 | British | 85 years |
| Elodie Marie Francoise Brian | Director | 5 Jun 2019 | 27 Sept 2021 | French | 47 years |
| Frederick George Thomas Holliday | Director | 8 Sept 1997 | 17 Oct 2002 | British | 91 years |
| Gordon Alexander Boyd | Director | 28 Sept 2021 | 28 Mar 2022 | British | 66 years |
| Harry Arthur Blair Holt | Director | 23 Oct 2017 | 10 Oct 2022 | British | 58 years |
| Ian Philip Butcher | Director | 1 Apr 1996 | 1 Jul 2007 | British | 75 years |
| Ian Philip Butcher | Secretary | 1 Apr 1996 | 30 Jun 2006 | British | - |
| Javier Perez Fortea | Director | 10 Oct 2022 | 13 Jan 2025 | Spanish | 66 years |
| Katherine Christina Mary Innes Ker | Director | 9 Jul 2010 | 24 Nov 2020 | British | 66 years |
| Keith Down | Director | 7 Mar 2011 | 6 Dec 2015 | British | 61 years |
| Keith Lawrence Ludeman | Director | 3 Sept 2004 | 2 Jul 2011 | British | 76 years |
| Leanne Wood | Director | 23 Oct 2017 | 10 Oct 2022 | British | 54 years |
| Martin Stanley Andrew Ballinger | Director | 19 Oct 1991 | 31 Dec 2004 | British | 83 years |
| Michael Ian Bowstead Straker | Director | 19 Oct 1991 | 28 Aug 1998 | British | 98 years |
| Miguel Angel Parras | Director | 20 Nov 2023 | 16 Jul 2025 | Spanish | 47 years |
| Nicholas Swift | Director | 17 Jul 2007 | 7 Mar 2011 | British | 62 years |
| Nicholas Wenham Horler | Director | 14 Nov 2011 | 2 Nov 2017 | British | 67 years |
| Philip James Harmer | Director | 19 Oct 1991 | 31 Mar 1994 | British | 92 years |
| Robert Duncan Clegg | Director | 2 Feb 1995 | 20 Feb 1999 | British | 84 years |
| Rupert Lascelles Pennant-rea | Director | 17 Oct 2002 | 24 Oct 2013 | British | 78 years |
| Sarah Elizabeth Mussenden | Director | 9 May 2022 | 31 Dec 2022 | British | 61 years |
| Sharon Emma Flood | Director | 1 Oct 2024 | 31 Jul 2025 | British,irish | 61 years |
| Simon Patrick Butcher | Director | 14 Mar 2016 | 30 Nov 2018 | British | 59 years |
| Trevor Halliday Shears | Director | 19 Oct 1991 | 31 Mar 1996 | British | 81 years |
| Trevor Halliday Shears | Secretary | 19 Oct 1991 | 31 Mar 1996 | British | - |