| Alain Henri Pierre Dromer | Director | 3 Sept 2007 | 31 May 2012 | French | 72 years |
| Alan Gadd | Director | 20 Feb 2003 | 3 Jun 2005 | British | 66 years |
| Alan Henry Clifton | Director | 19 Mar 1992 | 1 Apr 2001 | British | 80 years |
| Alan Henry Palmer | Director | 19 Mar 1992 | 16 Mar 1999 | British | 82 years |
| Alistair Dougal Morrison | Director | 20 Feb 2003 | 21 Jun 2005 | British | 70 years |
| Andrew James Kirton | Director | 25 Feb 2020 | 31 Dec 2024 | British | 62 years |
| Anthony Blake Wyand | Director | 1 Jul 1993 | 10 Jun 2000 | British | 83 years |
| Barry Firoz Sanjana | Director | 1 Jan 1995 | 10 Jun 2000 | British | 71 years |
| Brian Leonard Grayson | Director | 19 Mar 1992 | 1 Jan 1997 | British | 84 years |
| Brian William Rennie Peters | Director | 1 Jul 1993 | 16 Mar 1999 | British | 86 years |
| Charles William Dawson Brand | Director | 22 Jan 1997 | 16 Mar 1999 | British | 64 years |
| Christopher Miles Oglethorpe | Director | 14 Dec 2005 | 30 Jan 2009 | British | 57 years |
| Clifford James Abrahams | Director | 24 Jul 2015 | 31 Dec 2015 | British | 59 years |
| Colin Andrew Purdie | Director | 3 Nov 2021 | 6 Jun 2023 | British | 47 years |
| Daniel Mchugh | Director | 19 Oct 2023 | 31 Dec 2024 | British | 53 years |
| David Clayton | Director | 14 Dec 2015 | 31 Aug 2020 | British | 64 years |
| David Kenneth Watson | Director | 16 Dec 2003 | 28 Aug 2007 | British | 67 years |
| David Robert Keen | Director | 19 Mar 1992 | 19 Jun 2000 | British | 75 years |
| David Tremblay | Director | 26 Feb 2002 | 4 Feb 2003 | British | 70 years |
| Dean Stannard | Director | 26 Feb 2002 | 30 Apr 2004 | British | 60 years |
| Donald James Mcdonald | Director | 19 Mar 1992 | 28 Apr 1994 | British | 89 years |
| Erich Paul Gerth | Director | 6 Oct 2009 | 30 Sept 2012 | American | 63 years |
| Euan George Munro | Director | 13 Jan 2014 | 4 Jan 2021 | British | 56 years |
| Frederic Arthur Gregory Hoad | Director | 1 Apr 1995 | 1 Jan 1997 | British | 87 years |
| Gerald Hubert Holtham | Director | 19 Jun 2000 | 24 Mar 2004 | British | 82 years |
| Ian Ainscow | Director | 1 Jun 1991 | 16 Mar 1999 | British | 69 years |
| Ian Bryan Womack | Director | 20 Feb 2003 | 30 Jun 2015 | British | 73 years |
| Ian Douglas Mathieson | Director | 30 Sept 1998 | 19 Dec 2000 | British | 84 years |
| James Leonard Tanner | Director | 13 May 2005 | 29 Feb 2008 | British | 66 years |
| James Sebastian Sandilands | Director | 19 Mar 1992 | 15 Mar 1995 | British | 82 years |
| Jan Nuttall | Director | 3 Oct 2001 | 30 Jun 2005 | British | 69 years |
| Jill Diane Barber | Director | 18 Oct 2023 | 31 Dec 2024 | British | 54 years |
| John Gordon Hodgson | Director | 20 Apr 2009 | 31 May 2013 | British | 66 years |
| John Leslie Parrott | Director | 1 Apr 1995 | 16 Apr 1999 | British | 78 years |
| Joseph Wijendra Erasmus Mariathasan | Director | 1 Apr 1995 | 16 Mar 1999 | British | 68 years |
| Katherine Lucy Garrett-cox | Director | 31 Mar 2004 | 28 Feb 2007 | British | 59 years |
| Keith Jones | Director | 19 Jun 2000 | 31 Dec 2006 | British | 74 years |
| Louise Anne Kay | Director | 10 Nov 2021 | 20 Oct 2023 | British | 57 years |
| Malcolm John Le May | Director | 2 Oct 2001 | 10 Jan 2003 | British | 68 years |
| Mark Connolly | Director | 24 Jul 2015 | 6 Sept 2016 | British | 67 years |
| Mark Jeffrey Buckley | Director | 23 Apr 2009 | 2 Sept 2009 | United States | 64 years |
| Martin Alexander Hall | Director | 19 Jun 2000 | 31 Aug 2001 | British | 67 years |
| Maurice Gerard Quirke | Director | 19 Jun 2000 | 16 Dec 2003 | British | 66 years |
| Michael Ashweek Evans | Director | 19 Mar 1992 | 30 Jun 1992 | British | 95 years |
| Michael James Sparkes | Director | 1 Apr 1995 | 16 Mar 1999 | British | 69 years |
| Michael John Bishop | Director | 18 Dec 2000 | 26 Oct 2001 | British | 76 years |
| Nicholas David Alford | Director | 1 Sept 2003 | 1 Jun 2008 | British | 72 years |
| Nigel Gordon Clemson | Director | 1 Feb 2010 | 20 Dec 2012 | British | 67 years |
| Oliver Michael Pugh | Director | 1 Jul 1993 | 10 Jun 2000 | British | 76 years |
| Patrick John Neville | Director | 21 Jul 2011 | 30 Jun 2015 | British | 66 years |
| Paul Andrew Abberley | Director | 19 Mar 2012 | 20 Nov 2013 | British | 67 years |
| Peter Anthony Rice | Director | 16 Mar 1999 | 10 Jun 2000 | British | 76 years |
| Peter Colin Frank Haynes | Director | 19 Jun 2000 | 19 Nov 2001 | British | 72 years |
| Peter Francis Rains | Director | 1 Jul 1993 | 16 Mar 1999 | British | 70 years |
| Peter Stratton | Director | 1 Apr 1995 | 30 Sept 1998 | British | 73 years |
| Philip Gordon Scott | Director | 16 Mar 2007 | 8 Nov 2007 | British | 72 years |
| Philip Johnson Twyman | Director | 16 Mar 1999 | 19 Jun 2000 | Australian | 82 years |
| Philip Johnson Twyman | Director | 24 Jan 2002 | 31 Mar 2004 | Australian | 82 years |
| Raoul Philip Gustav Bachman | Director | 20 Feb 2003 | 31 Aug 2003 | Swiss | 64 years |
| Richard Julian Field | Director | 21 Jan 2009 | 30 Apr 2014 | British | 63 years |
| Roy Kemp | Director | 19 Mar 1992 | 15 Mar 1995 | British | 83 years |
| Shirley Jill Garrood | Director | 22 Jan 1997 | 21 Mar 2001 | British | 69 years |
| Shirley Jill Garrood | Director | 22 Jan 1997 | 21 Mar 2001 | British | 69 years |
| Siobhan Geraldine Boylan | Director | 24 Sept 2007 | 27 May 2011 | British | 57 years |
| Susan Patricia Janet Ebenston | Director | 17 Dec 2014 | 31 Mar 2021 | British | 67 years |
| Thomas Patrick Howard | Director | 25 Jan 2021 | 31 Mar 2024 | Irish | 49 years |
| Veronique Liliane Arnoldi | Director | 22 Apr 2009 | 18 Jul 2011 | French | 61 years |