| Adam Paul Walker | Director | 7 Sept 2015 | 14 Dec 2023 | British | 40 years |
| Alistair James Wivell | Director | 23 Jul 1992 | 2 Jul 1996 | British | 81 years |
| Andrew Michael David Kirkman | Director | 11 Sept 2006 | 11 Feb 2011 | British | 54 years |
| Anthony Leon Philip Rabin | Director | 1 Apr 1998 | 21 Oct 2002 | British | 71 years |
| Anthony Leon Philip Rabin | Director | 2 Dec 2005 | 17 Aug 2009 | British | 71 years |
| Balfour Beatty Capital Ltd | Corporate Director | 21 Sept 2009 | 21 Sept 2009 | - | - |
| Brian Roland Walker | Director | 2 Apr 2007 | 22 Jul 2025 | British | 71 years |
| Christopher Hartley Whitehead | Director | 3 Jan 2006 | 1 Jan 2009 | British | 67 years |
| Christopher Loraine Spencer | Director | 3 Jan 2006 | 2 Jun 2009 | British | 71 years |
| Daniel James Greenspan | Director | 2 Oct 2007 | 15 Jan 2011 | British | 51 years |
| Daniel James Greenspan | Secretary | 2 Oct 2007 | 15 Jan 2011 | British | - |
| David James Swarbrick | Director | 1 Jan 2009 | 22 Aug 2018 | British | 60 years |
| David John Wilkinson | Director | 19 Dec 1991 | 31 Oct 1995 | British | 88 years |
| Denise Holdom | Director | 29 Jun 2015 | 22 Sept 2023 | British | 55 years |
| Denise Shotwell Hubley | Director | 21 Aug 2013 | 18 Dec 2017 | American | 59 years |
| Douglas Watt Kilpatrick | Director | 2 Jul 1996 | 30 Sept 1997 | British | 90 years |
| Douglas Watt Kilpatrick | Secretary | 8 Feb 1991 | 31 Jan 1992 | British | - |
| Douglas Watt Kilpatrick | Secretary | 2 Jul 1996 | 30 Sept 1997 | British | - |
| Francis Declan Finbar Tempany Mccormack | Director | 2 Jul 1996 | 29 Oct 2001 | Irish | 71 years |
| Ian Kenneth Rylatt | Director | 4 Jan 2000 | 15 Mar 2021 | British | 61 years |
| James Lionel Cohen | Director | 1 Apr 1998 | 2 Dec 2005 | British | 84 years |
| John Clarke Fox | Director | 22 Apr 1999 | 30 Nov 2003 | British | 81 years |
| John Dean | Director | 8 Feb 1991 | 31 Mar 1992 | British | 86 years |
| John Henry Needham | Director | 8 Jan 2003 | 28 Jan 2014 | British | 62 years |
| Lisa Marie Thomson | Director | 24 Jul 2013 | 7 Sept 2015 | British | 50 years |
| Michael Archbold | Director | 4 Jan 2000 | 4 Jul 2006 | British | 80 years |
| Michael John Colin Milton | Director | 2 Jul 1996 | 11 Nov 1998 | British | 87 years |
| Michael John Colin Milton | Secretary | 2 Jul 1996 | 11 Nov 1998 | British | - |
| Michael Melville Brown Ross | Director | 15 Oct 2003 | 15 Jan 2011 | British | 83 years |
| Paul Andrew Hawtin | Director | 8 Feb 2013 | 5 Jun 2015 | Uk | 50 years |
| Peter Anton Gerstrom | Director | 8 Feb 1991 | 19 Feb 1993 | British | 71 years |
| Peter Sandor Roughton | Secretary | 15 Feb 2011 | 29 Jun 2015 | - | - |
| Roger Haygarth Schofield | Director | 8 Feb 1991 | 2 Jul 1996 | British | 89 years |
| Roger Haygarth Schofield | Secretary | 31 Jan 1992 | 2 Jul 1996 | British | - |
| Sandip Mahajan | Director | 18 Jan 2011 | 24 Jul 2013 | British | 52 years |
| Stephen Peter Gibbs | Director | 21 Sept 2009 | 8 Feb 2013 | British | 61 years |
| Stewart Orrell | Director | 3 Jan 2006 | 30 Oct 2015 | British | 61 years |
| Stuart Kenneth Leadill | Director | 1 Apr 1998 | 30 Sept 2007 | British | 73 years |
| Stuart Kenneth Leadill | Secretary | 11 Nov 1998 | 30 Sept 2007 | British | - |
| Susan Marie Marotta | Director | 1 Jan 2008 | 12 May 2010 | British | 62 years |