| Abigail Jane Dunning | Director | 11 Nov 2021 | 15 Feb 2022 | British | 51 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 |
| Andrew Nicholas Hewson | Director | 30 Apr 1991 | 23 Sept 2002 | British | 68 years |
| Andrew Nicholas Hewson | Secretary | 30 Apr 1991 | 15 Mar 1995 | British | - |
| Andrew Nicholas Hewson | Secretary | 21 Mar 1995 | 1 Dec 1996 | British | - |
| Christopher Mark Stephen Evans | Director | 26 Jan 1998 | 31 Mar 2002 | British | 61 years |
| Christopher Mark Stephen Evans | Secretary | 15 Mar 1995 | 21 Mar 1995 | British | - |
| Christopher Patrick Jolly | Director | 29 Sept 1998 | 18 Dec 2000 | British | 73 years |
| David John Atkins | Director | 28 Mar 2003 | 1 Oct 2009 | British | 60 years |
| Dominic Martin Etienne Page | Director | 15 Feb 2022 | 31 May 2023 | British | 58 years |
| Edward Thomas David Luker | Director | 30 Sept 1996 | 18 Dec 2000 | British | 77 years |
| Frederick John Reeder | Director | 4 Oct 1999 | 18 Dec 2000 | British | 90 years |
| Geoffrey Harcroft Wright | Director | 23 Sept 2002 | 30 Jun 2006 | British | 83 years |
| Iain Farlane Sim Harris | Director | 23 Sept 2002 | 21 Nov 2003 | British | 64 years |
| Ian Michael Hollocks | Secretary | 1 Dec 1996 | 23 Sept 2002 | British | - |
| John Andrew Bywater | Director | 23 Sept 2002 | 31 Mar 2007 | British | 79 years |
| Jonathan Michael Emery | Director | 1 Jan 2007 | 8 Oct 2008 | British | 60 years |
| Lawrence Francis Hutchings | Director | 8 Oct 2008 | 28 Sept 2012 | British | 60 years |
| Mark Richard Bourgeois | Director | 30 Apr 2019 | 11 Nov 2021 | British | 58 years |
| Martin Clive Jepson | Director | 8 Oct 2008 | 31 Jul 2011 | British | 64 years |
| Michael Ashton | Director | 3 Feb 2020 | 27 Mar 2020 | New Zealander | 41 years |
| Michael John Baker | Director | 23 Sept 2002 | 30 Jun 2006 | British | 63 years |
| Nicholas Alan Scott Hardie | Director | 23 Sept 2002 | 14 Oct 2011 | British | 71 years |
| Nicholas Brian Treseder Alford | Director | 20 Nov 2001 | 23 Sept 2002 | British | 62 years |
| Nicholas Mark Leslau | Director | 18 Jul 1996 | 12 Aug 1997 | British | 67 years |
| Nigel William Wray | Director | 18 Jul 1996 | 30 Sept 1999 | British | 78 years |
| Paul James Whight | Director | 30 Apr 1991 | 31 Mar 2000 | British | 75 years |
| Paul Justin Denby | Director | 4 Nov 2021 | 28 Apr 2023 | British | 55 years |
| Paul Laurence Huberman | Director | 6 Jan 2000 | 23 Sept 2002 | British | 65 years |
| Peter William Beaumont Cole | Director | 23 Sept 2002 | 30 Apr 2019 | British | 67 years |
| Robin Paul Binks | Director | 30 Sept 1996 | 5 May 1998 | British | 74 years |
| Sandra Christine O'neill | Director | 30 Apr 1991 | 3 Jun 1994 | British | 76 years |
| Simon Charles Travis | Director | 3 Feb 2020 | 7 Aug 2025 | British | 57 years |
| Stuart John Haydon | Secretary | 23 Sept 2002 | 22 Sept 2011 | British | - |
| Thomas Cochrane | Director | 7 Aug 2020 | 19 May 2021 | British | 44 years |
| Timothy Paul Walton | Director | 11 May 1998 | 23 Sept 2002 | British | 65 years |