| Alan James Reid Thomson | Director | 7 May 1992 | 26 Oct 1995 | British | 91 years |
| Alistair Linn Webster | Director | 20 Jan 2004 | 30 Jun 2009 | British | 73 years |
| Allan Martin Griffiths | Director | 30 Jun 2009 | 1 Jun 2018 | British | 56 years |
| Alun Talfan Davies | Director | 14 Jun 1991 | 31 Jul 1995 | British | 113 years |
| Andrew John Wykes | Director | 23 Dec 2014 | 20 Mar 2024 | British | 60 years |
| Archibald Turner Gibson | Director | 14 Jun 1991 | 21 Oct 1993 | British | 94 years |
| Austin Thomas Reilly | Director | 21 Dec 1995 | 10 Oct 2002 | British | 80 years |
| Colin Matthew | Director | 16 Dec 1999 | 31 Dec 2003 | British | 76 years |
| Daniel Meredith Jones | Director | 23 Dec 2014 | 5 Dec 2017 | British | 55 years |
| David Bruce Pattullo | Director | 14 Jun 1991 | 28 Feb 1998 | British | 88 years |
| David Brynle Williams | Director | 14 Jun 1991 | 24 Aug 2000 | British | 86 years |
| David Charles Hasson | Director | 4 Jan 2006 | 14 Apr 2008 | British | 57 years |
| David Keith Marlais James | Director | 14 Jun 1991 | 21 Sept 2001 | British | 82 years |
| George Gibson Reid | Director | 20 Jan 2004 | 4 Jan 2006 | British | 58 years |
| Gerald Rees | Secretary | 14 Jun 1991 | 30 Nov 2000 | British | - |
| Iain William St Clair Scott | Director | 1 Sept 1997 | 19 Nov 1999 | British | 80 years |
| James Mackenzie Robertson Fraser | Director | 25 Aug 2000 | 21 Dec 2001 | British | 81 years |
| James Robin Browning | Director | 21 Oct 1993 | 31 Aug 1997 | British | 87 years |
| John Kenneth Mcdowall | Director | 14 Jun 1991 | 27 Jun 1996 | British | 101 years |
| John Martin Bryant | Director | 21 Mar 1996 | 21 Sept 2001 | British | 83 years |
| John Mcgoldrick | Director | 30 Jun 2009 | 30 Apr 2012 | British | 71 years |
| John Michael Morrissey | Director | 30 Jun 2009 | 31 Aug 2010 | British | 65 years |
| John Wynford Evans | Director | 14 Jun 1991 | 21 Sept 2001 | British | 92 years |
| Kevin Francis Dunne | Director | 23 Dec 2014 | 25 May 2017 | Irish | 50 years |
| Malcolm Glover Thomas | Director | 14 Jun 1991 | 5 Jan 1997 | British | 99 years |
| Michael John David Griffiths | Director | 18 Apr 2011 | 23 Dec 2014 | British | 77 years |
| Nicholas Thornton | Director | 14 Jun 1991 | 27 Aug 1993 | British | 84 years |
| Noreen Bray | Director | 1 Feb 1999 | 21 Sept 2001 | British | 76 years |
| Paul Gittens | Director | 19 Dec 2002 | 20 Jan 2004 | British | 71 years |
| Paul Gittins | Secretary | 30 Nov 2000 | 15 Feb 2013 | British | - |
| Peter Alexander Burt | Director | 27 Jun 1996 | 6 Jan 2003 | British | 82 years |
| Robert Joseph Johnstone Wickham | Director | 14 Jun 1991 | 3 Dec 1993 | British | 92 years |
| Steven David Russell Chessman | Director | 27 Aug 2010 | 28 Feb 2011 | British | 63 years |
| Stuart James Ballingall | Director | 14 Apr 2008 | 30 Jun 2009 | British | 62 years |
| Thomas Eric Hector Crawford | Director | 14 Jun 1991 | 1 May 1994 | British | 94 years |
| Thomas Oliver Hutchison | Director | 23 Jun 1993 | 27 Jun 1996 | British | 95 years |
| Timothy Mark Blackwell | Director | 30 Jun 2009 | 19 Sept 2011 | British | 57 years |