| Alan James Johnstone | Director | 4 Oct 2006 | 5 Sept 2016 | British | 63 years |
| Alan Robert Lyle Mcpherson | Director | 18 May 1999 | 1 Sept 2003 | British | 76 years |
| Alan Ross Gibson | Director | 18 Nov 2004 | 24 Mar 2005 | British | 67 years |
| Alan Thomas Curran | Director | 30 Apr 2009 | 30 Sept 2011 | British | 66 years |
| Alastair John Moody | Director | 19 May 2016 | 30 Jun 2016 | British | 54 years |
| Andrew Nigel Briggs | Director | 23 Jun 2015 | 17 Mar 2016 | British | 68 years |
| Bruce Middleton | Director | 1 Mar 2008 | 21 May 2012 | British | 57 years |
| Catriona Janet Gifford | Director | 17 Sept 2005 | 1 Mar 2008 | Scottish | 68 years |
| Christopher Edward Milne Watson | Secretary | 1 Oct 1999 | 24 Nov 2003 | British | - |
| Colin Ross Fleming | Director | 26 Jul 2006 | 23 Jun 2015 | British | 67 years |
| George Alexander Brown | Director | 1 Nov 2005 | 30 Apr 2009 | British | 76 years |
| Gerard Hugh Ward | Director | 24 Nov 2008 | 30 Apr 2011 | British | 73 years |
| Graham Good | Secretary | 27 Apr 1999 | 1 Oct 1999 | British | - |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| Ian Sclater Joy | Director | 17 Sept 2005 | 24 Nov 2008 | United Kingdom | 68 years |
| John Graham Pearson | Director | 24 Mar 2005 | 23 Jun 2015 | British | 63 years |
| John Stewart | Director | 18 May 1999 | 1 Nov 2005 | British | 77 years |
| Jonathan Charles Oakey | Director | 15 Sept 2003 | 26 Jul 2006 | British | 61 years |
| Kenneth Allan Mccombie | Director | 27 Apr 1999 | 17 Sept 2005 | British | 60 years |
| Leslie James Thomas | Director | 19 May 2004 | 17 Sept 2005 | British | 69 years |
| Michael Straughen | Director | 18 May 1999 | 17 Jan 2000 | British | 76 years |
| Neil Alexander Bruce | Director | 17 Jan 2000 | 4 Oct 2006 | British | 66 years |
| Philip Albert Massie | Director | 18 May 1999 | 1 Aug 2003 | British | 71 years |
| Robert Muirhead Birnie Brown | Secretary | 1 Sept 2010 | 18 Dec 2015 | - | - |
| Robin Watson | Director | 21 May 2012 | 23 Jun 2015 | British | 59 years |
| Terence Ralph Hill | Director | 1 Sept 2003 | 18 Nov 2004 | British | 73 years |
| William Edgar | Director | 18 May 1999 | 19 May 2004 | British | 88 years |