| Alan Alexander Bryce | Director | 31 Jan 2007 | 1 Oct 2009 | British | 66 years |
| Alan William Mcculloch | Secretary | 1 May 2003 | 30 Sept 2005 | British | - |
| Alison Mary Mcgregor | Director | 15 Nov 2018 | 22 Aug 2024 | British | 65 years |
| Andrew Ross Mitchell | Secretary | 1 Dec 1998 | 1 May 2003 | British | - |
| David Rutherford | Director | 6 Sept 2005 | 31 Jan 2007 | British | 63 years |
| David Thomas Nish | Director | 10 Jan 2005 | 6 Sept 2005 | British | 66 years |
| Denise Mary Holt | Director | 31 Mar 2014 | 24 Jun 2014 | British | 77 years |
| Donald James Mcpherson | Secretary | 30 Sept 2005 | 30 Jun 2006 | British | - |
| Duncan Whyte | Director | 1 Dec 1998 | 31 May 1999 | British | 80 years |
| Elizabeth Zaidee Haywood | Director | 1 Jan 2015 | 31 Dec 2017 | British | 71 years |
| Frank Mitchell | Director | 1 Oct 2009 | 26 Aug 2022 | British | 62 years |
| Iain Maury Campbell Meiklejohn | Nominee Director | 7 Sept 1998 | 1 Dec 1998 | British | 72 years |
| Iain Maury Campbell Meiklejohn | Nominee Secretary | 7 Sept 1998 | 1 Dec 1998 | British | - |
| Ian Simon Macgregor Russell | Director | 1 Dec 1998 | 14 Aug 2001 | British | 73 years |
| James Fleming Wilson | Director | 14 Aug 2001 | 23 Dec 2005 | British | 74 years |
| James Robert Will | Nominee Director | 7 Sept 1998 | 1 Dec 1998 | British | 71 years |
| James Rufus Mcdonald | Director | 31 Mar 2014 | 18 Nov 2015 | British | 69 years |
| James Sutherland | Director | 30 Mar 2005 | 18 Nov 2005 | British | 60 years |
| John Matthew Hutton | Director | 16 Jul 2024 | 5 May 2025 | British | 71 years |
| Kenneth Leslie Vowles | Director | 8 Nov 1999 | 14 Aug 2001 | British | 84 years |
| Lesley Anne Glover | Director | 3 Jul 2019 | 20 Mar 2022 | British | 70 years |
| Marie Isobel Ross | Secretary | 26 Oct 2007 | 7 Jan 2011 | British | - |
| Michael Howard Davies | Secretary | 7 Jan 2011 | 31 Dec 2014 | British | - |
| Rhona Gregg | Secretary | 30 Jun 2006 | 26 Oct 2007 | British | - |
| Robert Francis Bayvel Maclaren | Director | 14 Aug 2001 | 30 Mar 2005 | British | 76 years |
| Ronnie Edward Mercer | Director | 14 Aug 2001 | 10 Jan 2005 | British | 82 years |
| Suzanne Fox | Director | 27 Sept 2017 | 15 Nov 2018 | British | 57 years |
| Suzanne Fox | Director | 2 Feb 2022 | 31 Jan 2023 | British | 57 years |
| Vicky Kelsall | Director | 26 Aug 2022 | 30 Jun 2024 | British | 55 years |
| Wendy Jacqueline Barnes | Director | 1 Jan 2015 | 6 May 2020 | British | 69 years |