| Alun Morton Jones | Director | 16 Nov 1998 | 30 Apr 2004 | British | 73 years |
| Angus Lushington Wylie Brown | Director | 21 Dec 2004 | 31 Dec 2011 | British | 76 years |
| Bernard Francis Thomas Judge | Director | 16 Nov 1998 | 19 Jan 2001 | British | 81 years |
| Bryan David Myers | Director | 30 Apr 2004 | 31 Jan 2013 | British | 66 years |
| Christopher Martin Burgess | Director | 29 Sept 1991 | 27 Jan 1995 | British | 80 years |
| Christopher William Roberts Hayden | Director | 19 Jan 2001 | 30 Jun 2011 | British | 65 years |
| Clive Charles Page | Secretary | 30 Apr 2004 | 26 May 2015 | British | - |
| David Ian Thorley | Director | 6 Apr 2006 | 5 Aug 2007 | British | 70 years |
| Derek Potts | Director | 27 Jan 1995 | 31 Jan 1997 | British | 67 years |
| Derek Potts | Director | 1 Jan 2000 | 29 Jun 2001 | British | 67 years |
| Eamon Bradley | Director | 1 Feb 2001 | 30 Apr 2004 | British | 77 years |
| Eric Jackson | Director | 29 Sept 1991 | 27 Jan 1995 | British | 101 years |
| Graham Paul Hughes | Secretary | 30 Apr 2004 | 17 Jun 2009 | Other | - |
| Gregory Geiger | Director | 16 Nov 1998 | 17 Feb 2000 | American | 73 years |
| Harry Streets | Director | 1 Dec 1993 | 20 Sept 1995 | British | 79 years |
| John Bernard Cowper | Director | 16 Nov 1998 | 17 Apr 2000 | British | 68 years |
| John Muir Ritchie | Director | 27 Jan 1995 | 31 Oct 2000 | British | 82 years |
| John Raymond Witt | Director | 1 Feb 1997 | 12 Jun 1998 | Canadian | 62 years |
| Kenneth Checkley | Director | 18 Apr 2000 | 27 Aug 2004 | British | 72 years |
| Kevin Cramton | Director | 18 Feb 2000 | 9 Jun 2002 | United States | 66 years |
| Lewis Bernard Mack | Director | 29 Sept 1991 | 20 Sept 1995 | British | 78 years |
| Lewis Bernard Mack | Secretary | 29 Sept 1991 | 31 Jan 1995 | British | - |
| Matheson & Co Limited | Corporate Secretary | 31 Jan 1995 | 30 Apr 2004 | - | - |
| Nicholas John Jason | Director | 18 Sept 2017 | 26 Sept 2019 | American | 52 years |
| Nigel Martin Parker | Director | 21 Dec 2004 | 3 Feb 2006 | British | 68 years |
| Paul Alexander Macniven | Director | 25 Jul 2013 | 31 Oct 2016 | British | 60 years |
| Paul Alexander Macniven | Director | 10 Jun 2002 | 30 Apr 2004 | British | 60 years |
| Peter Beynon | Director | 12 Jun 1998 | 31 Dec 1999 | British | 68 years |
| Samuel George Houston | Director | 30 Jun 2001 | 30 Apr 2004 | British | 69 years |
| Stephen Glenn Hood | Director | 27 Jan 2015 | 18 Sept 2017 | British | 62 years |
| Steven Wyn Williams | Director | 16 Nov 2007 | 31 Dec 2013 | British | 75 years |
| Stuart Donald Kerr | Director | 1 Feb 2012 | 1 Jan 2015 | Belgian | 73 years |
| Stuart Edgar Foulds | Director | 18 Sept 2017 | 11 Feb 2022 | British | 71 years |
| Terry Christopher Watkins | Director | 29 Sept 1991 | 20 Sept 1995 | British | 81 years |