| Alan James Harris Stewart | Director | 1 Nov 2010 | 10 Jul 2014 | British | 66 years |
| Alison Clare Reed | Director | 1 Feb 1999 | 30 Apr 2005 | British | 70 years |
| Amanda Mellor | Director | 30 Jul 2009 | 1 Feb 2019 | British | 62 years |
| Andrew Robert Findlay | Director | 5 Mar 2009 | 31 Jan 2011 | British | 57 years |
| Christopher Littmoden | Director | 15 Aug 1992 | 31 Jan 1994 | British | 83 years |
| Clare Louise Pettitt | Director | 27 Jun 2019 | 30 Nov 2020 | British | 52 years |
| Daniel Oliver Brook | Director | 31 Jan 2020 | 16 Jul 2021 | British | 42 years |
| Emma Harris | Director | 14 Jan 2021 | 27 Oct 2023 | British | 48 years |
| Graham John Oakley | Director | 31 Dec 2004 | 31 Jul 2009 | British | 70 years |
| Graham John Oakley | Secretary | 15 Aug 1992 | 10 Mar 1998 | British | - |
| Helen Alison Weir | Director | 5 Jun 2015 | 31 Mar 2018 | British | 64 years |
| Ian Dyson | Director | 27 Jun 2005 | 14 Jul 2010 | British | 64 years |
| Jeffrey Irvine Denton | Director | 31 Jan 1994 | 28 Feb 2003 | British | 80 years |
| Joanna Marageret Hawkes | Director | 10 Jul 2015 | 31 Jan 2020 | British | 65 years |
| John Keith Oates | Director | 15 Aug 1992 | 31 Jan 1999 | British | 84 years |
| Lara Louise Brown | Director | 1 Oct 2018 | 27 Jun 2019 | British | 45 years |
| Laurel Claire Powers-freeling | Director | 5 Feb 2002 | 9 Nov 2004 | British | 69 years |
| Lindsay Dalton | Director | 31 Mar 2018 | 1 Oct 2018 | British | 45 years |
| Marc Bolland | Director | 14 Jul 2010 | 7 Feb 2011 | Dutch | 67 years |
| Nick James Folland | Director | 1 Feb 2019 | 27 Oct 2023 | British | 61 years |
| Patricia Howell | Secretary | 8 Feb 2018 | 31 Aug 2022 | - | - |
| Paul Allan Friston | Director | 10 Jul 2014 | 5 Jun 2015 | British | 53 years |
| Paula Maria Hay-plumb | Director | 28 Feb 2003 | 30 Jun 2005 | British | 66 years |
| Robert John Ivens | Secretary | 10 Mar 1998 | 12 Oct 2016 | British | - |
| Robert William Chaigneau Colvill | Director | 15 Aug 1992 | 31 Dec 2001 | British | 86 years |
| Verity Chase | Secretary | 12 Oct 2016 | 8 Feb 2018 | - | - |