| Adrian James Henry Ewer | Director | 11 May 1998 | 30 Mar 2001 | British | 73 years |
| Alan Edward Birch | Director | 20 Sept 2021 | 30 Sept 2024 | British | 56 years |
| Alan Robert Chaney | Director | 27 Jun 1997 | 6 Oct 1997 | British | 83 years |
| Andrew Bell | Director | 21 Feb 2007 | 28 Jun 2007 | British | 78 years |
| Angela Louise Roshier | Director | 29 Jul 2008 | 13 May 2010 | British | 51 years |
| Anna Louise Dellis | Director | 20 May 2014 | 22 Jan 2015 | British | 53 years |
| Anthony Bruce Cornwell | Director | 11 Jul 1997 | 6 Sept 1999 | British | 83 years |
| Anthony Charles Roper | Director | 6 Oct 1997 | 9 Jan 1998 | British | 66 years |
| Anthony Charles Roper | Secretary | 27 Jun 1997 | 15 May 1998 | British | - |
| Barry Simon Williams | Director | 23 Dec 2005 | 14 Aug 2007 | British | 56 years |
| Brian Mervyn Semple | Director | 20 Nov 2007 | 26 Aug 2009 | British | 80 years |
| Bruce Warren Dalgleish | Director | 15 Sept 2009 | 31 Dec 2009 | British | 59 years |
| Bruce Warren Dalgleish | Director | 31 Dec 2009 | 31 Mar 2012 | British | 59 years |
| Christopher James Elliott | Director | 7 Jan 1998 | 10 Oct 2003 | British | 76 years |
| Christopher John Blundell | Director | 31 Jan 2013 | 22 Mar 2017 | British | 60 years |
| Daniel Geoffrey North | Director | 26 Jun 2019 | 20 Sept 2021 | British | 38 years |
| David Boyd Lindsay | Director | 1 Jun 1998 | 31 Dec 2000 | British | 67 years |
| David Charles Carter | Secretary | 9 May 1997 | 27 Jun 1997 | British | - |
| David Christopher Howe | Secretary | 3 Sept 1998 | 28 Feb 2009 | British | - |
| David Francis Lindesay | Director | 13 Apr 2017 | 26 Jun 2019 | British | 66 years |
| David Michael Hardy | Director | 1 Nov 2005 | 30 Nov 2005 | British | 69 years |
| Ellen Charlotte Le Breton Schroder | Director | 1 Nov 2013 | 28 Oct 2015 | British | 69 years |
| Gary Arthur Neville | Director | 1 Dec 2005 | 12 Sept 2006 | British | 70 years |
| Gary Stephen Lucas | Director | 1 Aug 2004 | 31 Oct 2005 | British | 68 years |
| George Russell Sandars | Nominee Director | 9 May 1997 | 27 Jun 1997 | British | 72 years |
| Hannah O'gorman | Director | 20 Jul 2010 | 17 Nov 2015 | British | 55 years |
| Harvey John William Pownall | Director | 22 Mar 2017 | 22 Mar 2017 | British | 60 years |
| Hcp Social Infrastructure (uk) Limited | Corporate Secretary | 28 Feb 2009 | 29 Jun 2012 | United Kingdom | - |
| Ian Joseph Wells | Director | 12 Sept 2006 | 31 Mar 2009 | British | 75 years |
| James Armstrong | Director | 7 Jan 1998 | 15 Jun 1999 | British | 87 years |
| James William Ward | Director | 18 May 2005 | 21 Jan 2014 | British | 74 years |
| John Ivor Cavill | Director | 23 Jan 2015 | 20 Dec 2019 | British | 54 years |
| Jonathan Michael Sisson | Director | 1 Aug 2006 | 31 Jan 2013 | British | 75 years |
| Mark James Tribe | Director | 20 Sept 1999 | 21 Aug 2001 | British | 71 years |
| Michael Baybutt | Director | 12 Sept 2006 | 31 Mar 2009 | British | 72 years |
| Moira Elizabeth Black | Director | 7 Jan 1998 | 21 Feb 2007 | British | 76 years |
| Neil Edmund King | Director | 28 Jun 2007 | 13 Nov 2007 | British | 63 years |
| Neil Rae | Director | 19 Jan 2010 | 9 Mar 2023 | British | 55 years |
| Nigel Wythen Middleton | Director | 23 Jan 2003 | 22 Dec 2005 | British | 70 years |
| Peter John Sheldrake | Director | 2 Jul 2018 | 20 Dec 2019 | British | 67 years |
| Philip Joseph White | Director | 13 Nov 2007 | 29 Jul 2008 | British | 64 years |
| Philip Joseph White | Director | 4 May 2010 | 20 May 2014 | British | 64 years |
| Philip Kingdon Rees | Director | 27 Jun 1997 | 9 Jan 1998 | British | 78 years |
| Philip Peter Ashbrook | Director | 17 Nov 2015 | 29 Jun 2018 | British | 66 years |
| Phillip Joseph Dodd | Director | 31 Mar 2012 | 31 Jan 2013 | British | 71 years |
| Richard Weston | Director | 23 Apr 2001 | 31 Jul 2004 | British | 78 years |
| Richard Wilson Jewson | Director | 1 Jun 1998 | 1 Aug 2006 | British | 82 years |
| Sabrina Sidhu | Director | 2 Oct 2018 | 18 Dec 2018 | British | 47 years |
| Sheila Jamieson Clark | Director | 21 Jan 2014 | 2 Oct 2018 | British | 53 years |
| Timothy Richard Pearson | Director | 7 Jan 1998 | 18 May 2005 | British | 64 years |
| William Edward Keng Mesquitta | Secretary | 15 May 1998 | 3 Sept 1998 | British | - |
| William Frank Futcher | Director | 11 Jul 1997 | 9 Jan 1998 | British | 79 years |
| William Frank Futcher | Director | 1 Jul 1998 | 23 Apr 2001 | British | 79 years |
| William Robert Doughty | Director | 23 Dec 2005 | 31 Dec 2009 | British | 58 years |
| William Wright Mcnaught | Director | 21 Aug 2001 | 29 Jun 2007 | British | 81 years |