| Alexander Brian Cooper Short | Director | 1 Jan 2015 | 4 Jul 2016 | British | 59 years |
| Barrie Mason Jackson | Director | 10 May 1989 | 31 May 2005 | British | 71 years |
| David Thomas King | Director | 3 Jul 1995 | 31 Dec 1998 | British | 62 years |
| George Leggat | Director | 3 Apr 1995 | 31 Mar 2001 | British | 81 years |
| George Leggat | Secretary | 10 May 1989 | 1 Aug 1997 | British | - |
| Iain Buchanan Birrell | Director | 10 May 1989 | 31 Mar 2001 | British | 84 years |
| Ian Barrett Curle | Director | 31 Mar 2001 | 1 Jan 2015 | British | 65 years |
| James Edward Marr Walker | Director | 10 May 1989 | 31 Dec 1991 | British | 82 years |
| James Edward Turle | Director | 10 May 1989 | 31 Dec 1991 | British | 86 years |
| John James Griffen Good | Director | 10 May 1989 | 31 Jul 1996 | British | 83 years |
| John James Griffen Good | Director | 31 Mar 2001 | 1 Aug 2006 | British | 83 years |
| Martin Alexander Cooke | Director | 1 Aug 2006 | 1 Sept 2020 | British | 65 years |
| Martin Alexander Cooke | Secretary | 1 Jul 1997 | 1 Sept 2020 | British | - |
| Paul Alphonse Andre Guerin | Director | 10 May 1989 | 31 Mar 2001 | British | 75 years |
| Richard Jackson Arrol Hunter | Director | 10 May 1989 | 31 Dec 1991 | British | 71 years |
| Richard Jackson Arrol Hunter | Director | 31 Mar 2001 | 1 Jul 2014 | British | 71 years |
| William Scott Hogg | Director | 1 Apr 1996 | 30 Jun 1997 | British | 63 years |