| Alice Ann Darwall | Director | 2 Mar 2020 | 1 Apr 2022 | British | 58 years |
| Andrew James Gray Thomson | Director | 1 Jan 2007 | 19 Mar 2014 | British | 59 years |
| Andrew John Berger-north | Director | 8 Oct 2008 | 7 Aug 2020 | British | 65 years |
| Clare Frances Carson | Secretary | 26 Apr 1999 | 8 Sept 2000 | British | - |
| David John Atkins | Director | 21 Nov 2003 | 2 Nov 2020 | British | 60 years |
| Geoffrey Harcroft Wright | Director | 4 May 1992 | 30 Jun 2006 | British | 83 years |
| Hans Rainer Vogt | Director | 4 May 1992 | 31 Dec 1997 | British | 83 years |
| Henry Lawrence Flint | Director | 21 Dec 1993 | 31 Jul 1997 | British | 66 years |
| Iain Farlane Sim Harris | Director | 15 Sept 1997 | 21 Nov 2003 | British | 64 years |
| James Alan Lenton | Director | 30 Oct 2019 | 26 Apr 2021 | British | 51 years |
| James Henry Riddell | Director | 4 May 1992 | 16 Mar 1994 | British | 76 years |
| John Andrew Bywater | Director | 27 Apr 1998 | 31 Mar 2007 | British | 79 years |
| John Andrew William Dodds | Director | 4 May 1992 | 24 Aug 2001 | British | 70 years |
| John Richard Parry | Director | 4 May 1992 | 14 Jun 1993 | British | 92 years |
| Jonathan Hardy Sworn | Director | 4 May 1992 | 25 Aug 1993 | British | 78 years |
| Jonathan Michael Douglas Scott | Director | 4 May 1992 | 12 Aug 1993 | British | 80 years |
| Jonathan Michael Emery | Director | 1 Jan 2007 | 8 Oct 2008 | British | 60 years |
| Lawrence Francis Hutchings | Director | 8 Oct 2008 | 29 Sept 2012 | British | 60 years |
| Mark Richard Bourgeois | Director | 17 Mar 2017 | 11 Nov 2021 | British | 58 years |
| Martin Clive Jepson | Director | 8 Oct 2008 | 31 Jul 2011 | British | 64 years |
| Martin Plocica | Director | 17 Oct 2012 | 31 May 2017 | American | 64 years |
| Michael Ashton | Director | 3 Feb 2020 | 27 Mar 2020 | New Zealander | 41 years |
| Michael John Baker | Director | 1 Aug 2001 | 30 Jun 2006 | British | 63 years |
| Michael Skudder | Director | 4 May 1992 | 23 Dec 1992 | British | 93 years |
| Nicholas Alan Scott Hardie | Director | 1 Aug 2001 | 14 Oct 2011 | British | 71 years |
| Nicholas Timon Drakesmith | Director | 18 Jul 2012 | 1 Oct 2019 | British | 61 years |
| Peter William Beaumont Cole | Director | 23 Dec 1992 | 30 Apr 2019 | British | 67 years |
| Philip David Harold Brown | Director | 2 Nov 1993 | 31 May 1999 | British | 75 years |
| Rachel Sarah Booth | Director | 11 Feb 2016 | 27 Mar 2020 | Scottish | 60 years |
| Robert John Godwin Richards | Director | 4 May 1992 | 30 Sept 2009 | British | 70 years |
| Ronald Richard Spinney | Director | 11 Mar 1996 | 30 Sept 1999 | British | 85 years |
| Roy Sidney Johnson | Director | 4 May 1992 | 2 Nov 1993 | British | 89 years |
| Roy Sidney Johnson | Secretary | 4 May 1992 | 2 Nov 1993 | British | - |
| Simon Charles Travis | Director | 3 Feb 2020 | 1 Apr 2022 | British | 57 years |
| Simon Charles Travis | Director | 1 Apr 2022 | 7 Aug 2025 | British | 57 years |
| Stuart John Haydon | Secretary | 2 Nov 1993 | 26 Apr 1999 | British | - |
| Stuart John Haydon | Secretary | 8 Sept 2000 | 22 Sept 2011 | British | - |
| Sydney Mason | Director | 4 May 1992 | 14 Jun 1993 | British | 106 years |
| Thomas Beaney | Director | 3 Feb 2020 | 11 Nov 2021 | British | 42 years |
| Thomas Cochrane | Director | 7 Aug 2020 | 19 May 2021 | British | 44 years |
| Timothy Carlo Newman | Director | 23 Dec 1992 | 2 Nov 1993 | British | 66 years |