| Alison Ann Hargreaves | Secretary | 28 Oct 1997 | 13 Aug 1999 | British | - |
| Antony Christie | Director | 5 Oct 2007 | 10 Apr 2012 | British | 62 years |
| Antony Christie | Director | 10 Apr 2012 | 10 Oct 2012 | British | 62 years |
| Antony Christie | Director | 29 Jun 2012 | 29 Jun 2012 | British | 62 years |
| Caroline Hinchliffe | Secretary | 1 Jul 2008 | 31 Dec 2009 | British | - |
| Caroline Mary Tolhurst | Director | 13 Sept 2007 | 1 Oct 2007 | British | 65 years |
| Caroline Mary Tolhurst | Secretary | 13 Aug 1999 | 1 Jul 2008 | British | - |
| Christopher James Jukes | Director | 27 Feb 2013 | 11 Jun 2013 | British | 48 years |
| Christopher James Taite | Director | 4 Mar 2004 | 28 Apr 2004 | British | 55 years |
| Christopher Millard | Director | 17 Mar 2011 | 10 Apr 2012 | British | 57 years |
| David Robert Wright | Director | 18 Jul 2024 | 21 Jan 2025 | British | 45 years |
| Douglas Robert Jan De Broekert | Director | 28 Oct 1997 | 10 Dec 1998 | British | 87 years |
| Drusilla Charlotte Jane Rowe | Nominee Director | 22 Jul 1997 | 28 Oct 1997 | British | 65 years |
| Eleanor Jane Zuercher | Nominee Director | 22 Jul 1997 | 28 Oct 1997 | British | 63 years |
| Fiona Clare Boyce | Secretary | 1 Jan 2021 | 9 Dec 2022 | - | - |
| George Ian Macloy Cockburn | Director | 28 Oct 1997 | 31 Dec 1997 | British | 81 years |
| Jeremy David Tredennick Titchen | Director | 10 Apr 2000 | 8 Sept 2003 | British | 63 years |
| Jeremy Henry Moore Newsum | Director | 28 Oct 1997 | 22 Nov 1999 | British | 71 years |
| John Francis German | Director | 10 Apr 2012 | 10 Oct 2012 | British | 62 years |
| John Lloyd | Director | 16 Feb 2004 | 20 Sept 2004 | British | 69 years |
| Jonathan Osborne Hagger | Director | 28 Oct 1997 | 22 Nov 1999 | British | 77 years |
| Julian Richard Milne | Director | 10 Apr 2000 | 8 Sept 2003 | British | 70 years |
| Katharine Emma Robinson | Secretary | 31 Dec 2009 | 4 Aug 2010 | - | - |
| Leonie Watson-brock | Secretary | 4 Aug 2010 | 20 Sept 2013 | - | - |
| Lisa Sorrell | Secretary | 12 Mar 2014 | 31 Dec 2020 | - | - |
| Mark Robin Preston | Director | 22 Nov 1999 | 10 Apr 2000 | British | 58 years |
| Martin Aldred | Director | 10 Dec 1998 | 22 Nov 1999 | British | 81 years |
| Mervyn Howard | Director | 8 Sept 2003 | 27 Feb 2013 | British | 67 years |
| Miles George Sutherland Dunnett | Director | 4 Jan 2016 | 6 Jan 2016 | British | 57 years |
| Nathalie Marie Christine Hakim | Director | 8 Sept 2021 | 30 Nov 2022 | British | 39 years |
| Nicholas Oliver Preston | Director | 10 Oct 2012 | 31 Jan 2016 | British | 58 years |
| Nicholas Richard Scarles | Director | 19 Jan 2005 | 24 Jul 2006 | British | 64 years |
| Rachel Dickie | Director | 1 Jan 2021 | 7 Sept 2021 | British | 42 years |
| Raymond Charles Williams | Director | 10 Dec 1998 | 28 Apr 2004 | British | 73 years |
| Richard Brian Mallett | Director | 19 Jan 2005 | 29 Jun 2007 | British | 59 years |
| Richard Brian Mallett | Director | 19 Jul 2013 | 5 Aug 2013 | British | 59 years |
| Richard Brian Mallett | Director | 19 Aug 2013 | 27 Aug 2013 | British | 59 years |
| Richard Brian Mallett | Director | 4 Aug 2014 | 26 Aug 2014 | British | 59 years |
| Richard Brian Mallett | Director | 11 Sept 2014 | 15 Sept 2014 | British | 59 years |
| Richard Brian Mallett | Director | 1 Aug 2015 | 31 Aug 2015 | British | 59 years |
| Richard Brian Mallett | Director | 8 Oct 2015 | 12 Jul 2021 | British | 59 years |
| Richard Simon Handley | Director | 22 Nov 1999 | 19 Jan 2005 | British | 72 years |
| Robert Richard Davis | Director | 24 Jul 2006 | 17 May 2019 | British | 59 years |
| Sebastien Dominique Hyest | Director | 17 Dec 2012 | 7 Jan 2013 | French | 53 years |
| Sebastien Dominique Hyest | Director | 27 Feb 2013 | 21 Dec 2020 | French | 53 years |
| Stephen Howard Rhodes Musgrave | Director | 22 Nov 1999 | 19 Jan 2005 | British | 73 years |
| Stuart Robert Hartley Beevor | Director | 19 Jan 2005 | 17 Mar 2011 | British | 69 years |
| Trusec Limited | Corporate Nominee Secretary | 22 Jul 1997 | 28 Oct 1997 | United Kingdom | - |
| Virginia Duncan | Secretary | 20 Sept 2013 | 19 Feb 2014 | - | - |