| Alan John Ainsworth | Director | 14 Jul 1997 | 31 Mar 2006 | British | 75 years |
| Alexander Park Leitch | Director | 9 Aug 1991 | 14 Jul 1997 | British | 79 years |
| Andrew Stephen Melcher | Director | 30 Apr 1996 | 14 Jul 1997 | U S | 77 years |
| Brian Michael Thomas | Director | 30 Apr 1996 | 14 Jul 1997 | British | 74 years |
| Brian Pattison Garraway | Director | 9 Aug 1991 | 12 Dec 1991 | British | 95 years |
| Campbell David Fleming | Director | 11 Dec 2009 | 29 Apr 2016 | Australian | 62 years |
| Christopher John Morrogh | Director | 9 Aug 2013 | 31 Dec 2020 | British | 63 years |
| Crispin John Henderson | Director | 6 Mar 2002 | 28 Feb 2013 | British | 78 years |
| David Frederick Sachon | Director | 1 Aug 1997 | 31 Mar 2006 | British | 76 years |
| David Gasparro | Director | 25 Jun 2004 | 31 Jan 2009 | British | 61 years |
| Donald Armstrong Jordison | Director | 9 Aug 2013 | 1 May 2018 | British | 66 years |
| George Pallister Greener | Director | 12 Dec 1991 | 8 Mar 1996 | British | 81 years |
| Guy Evelyn Patrick Beech | Director | 14 Jul 1997 | 26 Jul 2000 | British | 65 years |
| Howard David Goldring | Director | 9 Aug 1991 | 29 May 1992 | British | 76 years |
| Howard James Maguire | Director | 12 Dec 1991 | 6 Dec 1995 | British | 78 years |
| Howard James Maguire | Director | 14 Jul 1997 | 30 Apr 2000 | British | 78 years |
| Ian Graham Seward | Director | 30 Apr 1996 | 14 Jul 1997 | British | 79 years |
| James Mark Alexander Rigg | Director | 9 Aug 2013 | 28 Oct 2025 | British | 58 years |
| Jeremy Ward Grayburn | Director | 12 Dec 1991 | 14 Jul 1997 | British | 74 years |
| John Adrian Varcoe Grimshaw | Director | 12 Jun 2006 | 24 Nov 2008 | British | 64 years |
| John Devine | Director | 14 Nov 2008 | 1 Dec 2010 | British | 68 years |
| John Marcus Willcock | Director | 9 Aug 2013 | 31 Dec 2020 | British | 63 years |
| John Peter Gurney | Director | 9 Aug 1991 | 6 Dec 1995 | British | 90 years |
| Keith John Davies | Director | 12 Dec 1991 | 11 Aug 1992 | British | 79 years |
| Keith John Davies | Director | 26 Jun 1996 | 15 Aug 1997 | British | 79 years |
| Keith Reginald Baldwin | Director | 30 Apr 1996 | 14 Jul 1997 | British | 78 years |
| Kenneth William Ballard Inglis | Director | 9 Aug 1991 | 29 Apr 1994 | British | 83 years |
| Mary Elizabeth Blair | Director | 14 Jul 1997 | 26 Jul 2000 | British | 75 years |
| Nicholas John Kirk | Director | 14 Jul 1997 | 31 Mar 1999 | British | 73 years |
| Nicholas John Ring | Director | 2 Jul 2009 | 24 Jun 2015 | British | 61 years |
| Norman John Sharman | Director | 1 Jun 1992 | 28 Oct 1994 | British | 74 years |
| Norman Robert Leslie | Director | 12 Dec 1991 | 13 Jan 1993 | British | 82 years |
| Paul Victor Sant Manduca | Director | 30 Apr 1996 | 22 Feb 1999 | British | 75 years |
| Peter Charles Howe | Secretary | 9 Aug 1991 | 1 Jul 1997 | British | - |
| Phil Andrew Hodkinson | Director | 30 Apr 1996 | 15 Aug 1997 | British | 68 years |
| Philip James William Reed | Director | 1 Oct 2007 | 30 Jun 2014 | British | 64 years |
| Philip Smith | Director | 12 Dec 1991 | 14 Jul 1997 | British | 79 years |
| Richard John Drake Eats | Director | 18 Aug 1998 | 2 Aug 2000 | British | 81 years |
| Robin Douglas Clark | Director | 14 Jul 1997 | 22 May 1998 | British | 70 years |
| Simon Howard Davies | Director | 14 Jul 1997 | 1 Aug 2007 | British | 67 years |
| Thomas William Challenor | Director | 22 Sept 1997 | 30 Jun 2009 | British | 71 years |
| Timothy Nicholas Gillbanks | Director | 9 Mar 2005 | 1 Sept 2014 | British | 60 years |
| Timothy Nicholas Gillbanks | Director | 7 Nov 2016 | 31 Mar 2017 | British | 60 years |
| William David Lowndes | Director | 17 Nov 1998 | 12 Jun 2006 | British | 63 years |