| Alan Robert Robertson | Director | 12 Feb 1998 | 14 May 2005 | British | 64 years |
| Angus John Giffard Irvine | Director | 3 Sept 1991 | 30 Sept 1997 | British | 96 years |
| Anthony John King | Director | 3 Sept 1991 | 31 Mar 1997 | British | 89 years |
| Austin Spencer Lewis | Director | 14 Oct 2010 | 28 Aug 2013 | British | 60 years |
| Babcock Corporate Secretaries Limited | Corporate Secretary | 25 Feb 2013 | 23 Dec 2021 | United Kingdom | - |
| Christopher Graham Wigg | Director | 3 Feb 1997 | 11 Aug 2000 | British | 75 years |
| David James Jackson | Director | 6 Apr 2000 | 16 Jun 2004 | British | 79 years |
| David Martin Best | Director | 6 Apr 2000 | 31 Mar 2003 | British | 68 years |
| David Matthew Bramwell | Director | 6 Apr 2000 | 31 Mar 2002 | British | 79 years |
| Duncan Smith | Director | 23 Dec 2021 | 12 Sept 2023 | British | 55 years |
| Franco Martinelli | Director | 11 May 2005 | 13 Sept 2016 | British | 66 years |
| Gerald Malcolm Hough | Director | 3 Sept 1991 | 30 Jun 1994 | British | 96 years |
| Graham David Leeming | Director | 14 Oct 2010 | 1 Jul 2016 | British | 58 years |
| Graham Matthew Reid | Director | 2 Jan 2002 | 30 Sept 2003 | British | 64 years |
| Graham Stuart Foster | Director | 3 Sept 1991 | 31 Mar 1999 | British | 87 years |
| Iain Stuart Urquhart | Director | 17 Dec 2014 | 23 Dec 2021 | British | 61 years |
| Ilaria Evans | Secretary | 15 Sept 2022 | 20 Nov 2023 | - | - |
| James Gareth Orpen | Director | 1 Sept 1994 | 24 Jul 1996 | British | 78 years |
| James Michael Arnold | Director | 23 Dec 2021 | 1 Jan 2023 | British | 61 years |
| James Michael Rabbitt | Director | 3 Sept 1991 | 24 Apr 1997 | British | 83 years |
| James Robert Winnicott | Director | 23 Dec 2021 | 28 Feb 2023 | British | 58 years |
| John Andrew Woollhead | Secretary | 3 Sept 1991 | 23 Dec 2004 | British | - |
| John Mcgrath | Director | 29 Mar 2011 | 28 Aug 2013 | British | 55 years |
| John Patrick Perry | Director | 3 Sept 1991 | 31 Mar 1994 | British | 95 years |
| John Peter O'kane | Director | 30 Sept 2003 | 31 Jul 2004 | Irish | 68 years |
| John Richard Davies | Director | 1 Dec 2015 | 28 Jun 2021 | British | 63 years |
| Kevin Richard Thomas | Director | 29 Mar 2011 | 2 Nov 2015 | British | 72 years |
| Lindsay Holmes Brown | Director | 28 Aug 2013 | 1 Aug 2018 | British | 63 years |
| Matthew Hayward | Director | 3 Aug 2020 | 23 Dec 2021 | British | 60 years |
| Michael John Farebrother | Director | 1 Aug 1998 | 6 Jan 2000 | British | 85 years |
| Nicholas James William Borrett | Secretary | 27 Jul 2012 | 25 Feb 2013 | - | - |
| Nigel Alistair Mckinnell | Director | 2 Jan 2002 | 15 Aug 2003 | British | 69 years |
| Peter Charles Adams | Director | 1 Apr 1994 | 8 Aug 1996 | British | 73 years |
| Peter Francis Corley | Director | 14 Jul 1993 | 1 Mar 2000 | British | 83 years |
| Peter Lloyd Rogers | Director | 16 Jun 2004 | 31 Aug 2016 | British | 79 years |
| Pieter Esbach | Director | 27 Jul 2015 | 15 May 2019 | British | 64 years |
| Richard Hewitt Taylor | Director | 1 Jul 2016 | 31 Oct 2021 | British | 65 years |
| Richard William Neall | Director | 2 Jan 2002 | 27 Sept 2002 | Australian | 62 years |
| Robert Forbes | Director | 10 Dec 2014 | 15 May 2019 | British | 61 years |
| Robert Frank Whiley | Director | 2 Jan 2002 | 14 Oct 2010 | British | 71 years |
| Robert Frank Whiley | Director | 28 Aug 2013 | 27 Jul 2015 | British | 71 years |
| Roger George Ames | Director | 3 Sept 1991 | 31 Mar 1997 | British | 99 years |
| Sally Fiona Brooks | Director | 1 Aug 2018 | 15 May 2019 | British | 60 years |
| Samuel Michael White | Director | 15 May 2019 | 3 Aug 2020 | British | 50 years |
| Stanley Alan Royall Billiald | Director | 18 Feb 2005 | 23 May 2007 | Other | 82 years |
| Stanley Alan Royall Billiald | Secretary | 4 Oct 2004 | 1 Jul 2009 | Other | - |
| Stephen Jeffrey Cocliff | Director | 1 Sept 2002 | 31 Jan 2004 | British | 68 years |
| Steven West | Director | 15 May 2019 | 11 Oct 2019 | British | 51 years |
| Valerie Francine Anne Teller | Secretary | 1 Jul 2009 | 27 Jul 2012 | British | - |
| William James Cooper | Secretary | 23 Dec 2021 | 15 Sept 2022 | - | - |
| William Kerss | Director | 1 Apr 1997 | 18 Dec 1997 | British | 95 years |
| William Tame | Director | 16 Jun 2004 | 17 Dec 2014 | British | 72 years |