| Alexander Scott Bell | Director | 11 Apr 1989 | 15 Mar 2002 | British | 84 years |
| Archibald James Angus Macuish Gray | Secretary | 11 Apr 1989 | 14 Nov 1993 | British | - |
| David Cameron Bentley | Director | 16 Mar 2002 | 28 Apr 2011 | Uk | 71 years |
| David Drysdale Fotheringham | Secretary | 15 Nov 1993 | 1 Mar 1996 | British | - |
| David John Archibald | Director | 14 Jun 2011 | 29 Sept 2017 | British | 61 years |
| Gillian Mcgovern | Secretary | 1 May 2007 | 22 Apr 2015 | British | - |
| Graham Scott Nichol | Director | 28 Apr 2011 | 14 Jun 2011 | British | 61 years |
| Iain Cobden Lumsden | Director | 26 May 1998 | 13 Jan 2004 | British | 79 years |
| James Stretton | Director | 11 Apr 1989 | 15 Dec 2001 | British | 82 years |
| John Francis Henry Trott | Director | 22 Mar 1994 | 28 Apr 1998 | British | 87 years |
| John Francis Hylands | Director | 16 Dec 2001 | 31 Mar 2007 | British | 74 years |
| Judith Mckenzie Coutts | Secretary | 22 Apr 2015 | 31 Aug 2018 | - | - |
| Lawrence Airey | Director | 11 Apr 1989 | 22 Mar 1994 | British | 99 years |
| Michael Douglas Craig | Director | 1 Jun 2012 | 15 Jul 2019 | British | 61 years |
| Norman Douglas Dowie | Director | 30 May 2006 | 31 Aug 2018 | British | 67 years |
| Norman Lessels | Director | 11 Apr 1989 | 28 Apr 1998 | British | 87 years |
| Peter Walter Somerville | Secretary | 1 Mar 1996 | 1 May 2007 | British | - |
| Simon Alexander Dawson Burns | Director | 29 Mar 2011 | 15 Jan 2015 | British | 60 years |
| Stephen Keith Percival | Director | 31 Aug 2018 | 30 Apr 2021 | British | 50 years |
| Stratton Street Trustees Limited | Corporate Director | 20 Jun 2000 | 7 Nov 2000 | United Kingdom | - |
| Stratton Street Trustees Limited | Corporate Director | 2 Mar 2006 | 27 Sept 2006 | United Kingdom | - |