| Colin James Cole | Secretary | 20 Apr 1998 | 23 Oct 2002 | British | - |
| Colin Neil Chandler | Secretary | 23 Oct 2002 | 17 Feb 2006 | British | - |
| David Jenkinson | Director | 1 May 2016 | 20 Sept 2020 | British | 58 years |
| David Wilson Taylor | Director | 13 Sept 1996 | 20 Apr 1998 | British | 75 years |
| Eric John Pountain | Director | 14 Oct 1994 | 20 Apr 1998 | British | 92 years |
| Geoffrey Robert Swarbrick | Director | 7 Dec 1991 | 28 Jun 1996 | British | 84 years |
| Geoffrey Robert Swarbrick | Secretary | 7 Dec 1991 | 28 Jun 1996 | British | - |
| Gerald Neil Francis | Director | 17 Jan 2006 | 30 Sept 2016 | British | 69 years |
| Graham Arthur Henry Thorpe | Director | 27 Nov 1997 | 20 Apr 1998 | British | 88 years |
| Grenville Alun Evans | Director | 1 Oct 1996 | 27 Mar 1997 | British | 71 years |
| Henry Edward Farley | Director | 7 Dec 1991 | 20 Apr 1998 | British | 95 years |
| James Walter Barr | Director | 7 Nov 1997 | 20 Apr 1998 | British | 76 years |
| Jeffrey Fairburn | Director | 1 Jan 2010 | 31 Dec 2018 | British | 59 years |
| Jeremy Rowe | Director | 7 Dec 1991 | 28 Sept 1996 | British | 97 years |
| John Bernard Davies | Director | 7 Dec 1991 | 15 Jan 1993 | British | 88 years |
| John Henry Bennett | Director | 20 Apr 1998 | 31 Mar 2006 | British | 78 years |
| John Ware Maunders | Director | 7 Dec 1991 | 20 Apr 1998 | British | 80 years |
| John White | Director | 17 Jan 2006 | 31 Dec 2009 | British | 74 years |
| Martin Charles Donohue | Director | 20 Apr 1998 | 1 Nov 2005 | Irish | 80 years |
| Michael Hugh Killoran | Director | 17 Jan 2006 | 14 Jan 2022 | British | 64 years |
| Michael Peter Farley | Director | 17 Jan 2006 | 18 Apr 2013 | British | 72 years |
| Nigel Peter Greenaway | Director | 18 Apr 2013 | 30 Apr 2016 | British | 65 years |
| Nigel Terry Fee | Director | 20 Apr 1998 | 24 Jan 2006 | British | 74 years |
| Peter David Kendall | Secretary | 28 Jun 1996 | 20 Apr 1998 | British | - |
| Peter David Kendall | Director | 7 Dec 1991 | 20 Apr 1998 | British | 76 years |
| Richard Paul Stenhouse | Director | 30 Sept 2016 | 30 Sept 2021 | British | 54 years |
| Robin John Davies | Director | 20 Apr 1998 | 23 Oct 2002 | Uk | 70 years |
| Roland Pinder | Director | 7 Dec 1991 | 20 Mar 1995 | British | 75 years |
| Willaim Henry Bannister | Director | 7 Dec 1991 | 20 Apr 1998 | British | 76 years |