| Andrew Richard John Calvert | Director | 31 May 1996 | 27 Aug 1998 | British | 74 years |
| David Jenkinson | Director | 1 May 2016 | 20 Sept 2020 | British | 58 years |
| David John Smith | Director | 27 Aug 1998 | 19 Mar 2001 | British | 67 years |
| Dennis Michael Webb | Director | 31 May 1996 | 28 Oct 1999 | British | 85 years |
| Geoffrey Grewer | Director | 19 Mar 2001 | 1 May 2002 | British | 83 years |
| Geoffrey Grewer | Secretary | 18 May 2001 | 20 Jul 2001 | British | - |
| Gerald Neil Francis | Director | 1 May 2002 | 29 Dec 2006 | British | 69 years |
| Gerald Neil Francis | Director | 1 Jan 2010 | 30 Sept 2016 | British | 69 years |
| Ian Brown | Secretary | 26 Dec 1991 | 15 Oct 1992 | British | - |
| Jeffrey Fairburn | Director | 1 Jan 2010 | 31 Dec 2018 | British | 59 years |
| John David Low | Director | 28 Oct 1999 | 1 Jun 2001 | British | 81 years |
| John Meredyth Wood | Director | 26 Dec 1991 | 31 Dec 1998 | British | 78 years |
| John White | Director | 5 Jun 2001 | 31 Dec 2009 | British | 74 years |
| Laurence Edwin Garner | Director | 22 Jan 1999 | 1 Oct 2001 | British | 78 years |
| Laurence Edwin Garner | Secretary | 22 Jan 1999 | 18 May 2001 | British | - |
| Michael Hugh Killoran | Director | 19 Mar 2001 | 14 Jan 2022 | British | 64 years |
| Michael Peter Farley | Director | 1 Jan 2010 | 18 Apr 2013 | British | 72 years |
| Nicholas Howard Smith | Director | 23 Feb 1995 | 11 May 2001 | British | 68 years |
| Nicholas Robert Scregg | Director | 26 Dec 1991 | 31 Dec 1994 | British | 70 years |
| Nigel Peter Greenaway | Director | 18 Apr 2013 | 30 Apr 2016 | British | 65 years |
| Paul Mario Bak | Director | 26 Dec 1991 | 30 Sept 1996 | British | 70 years |
| Paul Mario Bak | Secretary | 15 Oct 1992 | 30 Sept 1996 | British | - |
| Richard Miles Cordy | Director | 3 Oct 2000 | 14 Jun 2001 | British | 67 years |
| Richard Paul Stenhouse | Director | 30 Sept 2016 | 30 Sept 2021 | British | 54 years |
| Stephen Watt | Director | 5 Jun 2001 | 31 Dec 2003 | British | 68 years |
| Stewart Antony Baseley | Director | 26 Dec 1991 | 26 Jun 1998 | British | 67 years |
| Susanna Bridgette Church | Director | 26 Dec 1991 | 8 Feb 1994 | British | 82 years |
| Walter Louis Farndon Broadbent | Director | 1 Sept 1996 | 22 Jan 1999 | British | 62 years |
| Walter Louis Farndon Broadbent | Secretary | 30 Sept 1996 | 22 Jan 1999 | British | - |