| Alistair Baillie | Director | 1 Jan 1998 | 29 Jan 2004 | British | 66 years |
| Andrew Richard Burgess | Director | 15 Jan 1997 | 1 Jan 1998 | Australian | 80 years |
| Andrew Stewart Kent | Director | 1 Jul 1998 | 2 Nov 1998 | British | 77 years |
| Andrew Stewart Kent | Director | 10 Sept 1999 | 31 Mar 2005 | British | 77 years |
| Andrew William Smith | Director | 1 Jul 1998 | 22 Feb 1999 | English | 75 years |
| Anthony John Mason | Director | 23 Aug 1992 | 15 Jan 1997 | British | 74 years |
| Bo Ake Lerenius | Director | 14 Jun 1999 | 31 Mar 2007 | Swedish | 79 years |
| Campbell Dermot Nelson Mason | Director | 11 Apr 2007 | 31 Dec 2008 | Australian British | 60 years |
| Carole Jean Cran | Director | 3 Jan 2018 | 8 Nov 2024 | British | 55 years |
| Charles Graham Hammond | Director | 2 Nov 1998 | 30 Jun 2024 | British | 64 years |
| Charles William Orange | Director | 23 Aug 1992 | 1 Apr 1994 | British | 83 years |
| Charles William Orange | Director | 1 Jul 1998 | 10 Sept 1999 | British | 83 years |
| David Anthony Browne | Director | 11 Oct 1995 | 31 Dec 1999 | British | 86 years |
| David Michael Cross | Director | 22 Nov 1999 | 14 May 2002 | British | 72 years |
| Dennis Dunn | Director | 13 Dec 1995 | 2 Nov 1998 | British | 85 years |
| Derek Francis Mcbride | Director | 23 Aug 1992 | 31 Dec 1995 | British | 87 years |
| Douglas Downie Morrison | Director | 1 Apr 2005 | 25 Jan 2012 | British | 74 years |
| Flemming Dalgaard | Director | 16 Apr 2008 | 25 Jan 2012 | Danish | 61 years |
| George Sebastian Matthew Bull | Director | 25 Feb 2011 | 25 Jan 2012 | British | 65 years |
| Iain David Cameron Simm | Director | 9 Dec 2005 | 13 Jul 2006 | British | 58 years |
| James Constantine Stuart Mcclean | Director | 1 Apr 1994 | 10 Sept 1999 | British | 66 years |
| Jeremy Gledhill | Director | 2 Nov 1998 | 12 Mar 2001 | British | 69 years |
| Jeremy James Lennox Rickcord | Director | 11 Oct 1995 | 31 Aug 2000 | British | 74 years |
| Jeremy James Lennox Rickcord | Director | 14 May 2002 | 29 Jan 2004 | British | 74 years |
| John William Buckley | Director | 29 Jan 2004 | 10 Mar 2005 | Australian | 70 years |
| Malcolm Frederick Ravenscroft | Director | 1 Apr 1994 | 22 Feb 1999 | British | 77 years |
| Martin David Parmenter | Director | 12 Mar 2001 | 30 Nov 2001 | British | 67 years |
| Michael Andrew Gibson | Director | 1 Apr 1998 | 25 Jan 2012 | British | 70 years |
| Michael Andrew Gibson | Secretary | 23 Aug 1992 | 31 Aug 2002 | British | - |
| Michael David Denchfield | Director | 23 Aug 1992 | 11 Oct 1995 | British | 88 years |
| Neale Martin Banfield | Director | 1 Jul 2004 | 23 Apr 2012 | British | 61 years |
| Neale Martin Banfield | Secretary | 1 Jul 2004 | 23 Apr 2012 | British | - |
| Nicholas Antony West | Director | 26 May 2001 | 30 Jun 2006 | British | 60 years |
| Nicholas Lawrence Luff | Director | 15 Jan 1997 | 31 Aug 2000 | British | 58 years |
| Patrick William Walters | Director | 1 Sept 2002 | 1 Jul 2004 | British | 59 years |
| Patrick William Walters | Director | 10 Mar 2005 | 16 Apr 2008 | British | 59 years |
| Patrick William Walters | Secretary | 1 Sept 2002 | 1 Jul 2004 | British | - |
| Patrick William Walters | Director | 1 Jul 1998 | 26 May 2001 | British | 59 years |
| Paul Cooper | Director | 1 Apr 2002 | 1 Jun 2009 | British | 71 years |
| Perry Dean Glading | Director | 2 Jul 1999 | 31 Mar 2017 | British | 67 years |
| Peter Anthony Jones | Director | 1 Apr 2007 | 25 Jan 2012 | British | 70 years |
| Peter Arthur Walker | Director | 11 Oct 1995 | 15 Jan 1997 | British | 72 years |
| Peter Arthur Walker | Director | 1 Aug 2006 | 25 Jan 2012 | British | 72 years |
| Peter Graham Pike | Director | 23 Aug 1992 | 26 Aug 1992 | British | 88 years |
| Raymond Alastair Channing | Director | 23 Aug 1992 | 13 Dec 1995 | British | 82 years |
| Richard John Adam | Director | 6 Jan 2000 | 26 Aug 2002 | British | 68 years |
| Richard John Adam | Director | 30 Sept 2002 | 28 Feb 2007 | British | 68 years |
| Robert Barclay Woods | Director | 23 Aug 1992 | 25 Jan 2012 | British | 79 years |
| Roger Roels | Director | 12 Jul 2006 | 31 Mar 2007 | Belgian | 70 years |
| Roger Roels | Director | 29 Feb 2004 | 9 Dec 2005 | British | 75 years |
| Stephen John Walsh | Director | 26 Aug 2002 | 30 Sept 2002 | British | 60 years |
| Stuart Randall Paterson | Director | 1 Jul 2011 | 3 Jan 2018 | British | 67 years |
| Zafar Iqbal Khan | Director | 1 Mar 2007 | 25 Feb 2011 | British | 57 years |