| Alexander Brian Cooper Short | Director | 1 Jan 2015 | 4 Jul 2016 | British | 59 years |
| Barrie Mason Jackson | Director | 12 May 1989 | 31 May 2005 | British | 71 years |
| Brian Gammell Ivory | Director | 1 Jan 1998 | 18 Nov 1999 | British | 77 years |
| Graham Robert Hutcheon | Director | 31 Mar 2010 | 31 Mar 2021 | British | 63 years |
| Ian Barrett Curle | Director | 1 Mar 1991 | 1 Jul 1997 | British | 65 years |
| Ian Barrett Curle | Director | 31 Mar 2001 | 29 Mar 2019 | British | 65 years |
| John Alexander Rose Macphail | Director | 12 May 1989 | 31 Dec 1993 | British | 103 years |
| John Campbell Dunlop | Director | 12 May 1989 | 31 Oct 1993 | British | 92 years |
| John Campbell Dunlop | Secretary | 12 May 1989 | 1 May 1993 | British | - |
| John James Griffen Good | Director | 12 May 1989 | 1 Aug 2006 | British | 83 years |
| John Macleod Goodwin | Director | 12 May 1989 | 31 Dec 1997 | British | 94 years |
| Martin Alexander Cooke | Director | 1 Aug 2006 | 1 Sept 2020 | British | 65 years |
| Martin Alexander Cooke | Secretary | 1 May 1993 | 1 Sept 2020 | British | - |
| Richard Jackson Arrol Hunter | Director | 12 May 1989 | 1 Jul 2014 | British | 71 years |
| Richard William Farrar | Director | 31 Mar 2010 | 5 Jun 2017 | British | 68 years |
| Robin Peter Gillies | Director | 1 Jul 1997 | 31 Mar 2001 | British | 69 years |