| Alan Irvine Pickup | Director | 17 Dec 1999 | 20 Sept 2002 | British | 84 years |
| Alan Renatus Frederick Hughes | Director | 6 May 1992 | 30 Jun 1997 | British | 75 years |
| Andrew James Huke | Director | 23 Jul 2007 | 28 Nov 2011 | British | 67 years |
| Atulkumar Brijmohan Kabra | Director | 9 Dec 2020 | 30 Sept 2025 | Indian | 52 years |
| Bruce Alan Fletcher | Director | 3 Feb 2011 | 25 Sept 2012 | American | 66 years |
| Catherine Mary Brett | Director | 18 Jul 2014 | 11 Jan 2016 | British | 61 years |
| Christopher David Spooner | Director | 20 Sept 2002 | 21 Sept 2007 | British | 76 years |
| David Jaffa | Director | 17 Dec 2003 | 29 Sept 2006 | British | 71 years |
| David John Clements | Director | 23 Jul 2004 | 28 Nov 2011 | British | 64 years |
| David Johnstone Mackay | Director | 1 Jul 1997 | 30 Jun 1998 | Scottish | 68 years |
| David Michael Watts | Director | 23 Jun 2017 | 4 Sept 2018 | British | 60 years |
| David William Gilman | Director | 1 Apr 1997 | 2 Jul 1999 | British | 74 years |
| Dennis Michael Smith | Director | 17 Dec 1999 | 31 Aug 2004 | British | 72 years |
| F T Limited | Corporate Director | 2 Jul 1999 | 17 Dec 1999 | - | - |
| Frances Ann Craig | Director | 6 Dec 2006 | 21 Sept 2007 | British | 66 years |
| Frances Julie Niven | Secretary | 23 Jul 2004 | 19 Jul 2005 | British | - |
| Graham Edward Picken | Director | 1 Apr 1997 | 2 Jul 1999 | British | 77 years |
| Griffin Limited | Corporate Director | 2 Jul 1999 | 17 Dec 1999 | United Kingdom | - |
| Hannah Elizabeth Shepherd | Secretary | 15 Oct 2013 | 4 Jul 2014 | - | - |
| Helen Docherty | Secretary | 26 Jan 2012 | 15 Oct 2013 | - | - |
| Hollie Rheanna Wood | Secretary | 10 Sept 2010 | 26 Jan 2012 | - | - |
| Howard Idris Morgan | Director | 6 May 1992 | 2 Jul 1999 | British | 83 years |
| Jacques Fleurant | Director | 26 Jul 2019 | 30 Sept 2021 | Canadian | 59 years |
| James Stewart Gunn | Director | 6 May 1992 | 25 Sept 1992 | British | 70 years |
| Jane Fahey | Secretary | 22 Sept 2016 | 9 Nov 2017 | - | - |
| John Hume Mckenzie | Secretary | 6 May 1992 | 17 Dec 1999 | British | - |
| Jonathan James Calladine | Director | 25 Sept 2012 | 4 Jul 2014 | British | 60 years |
| Lorna Youssouf | Secretary | 8 Nov 2017 | 4 Sept 2018 | - | - |
| Mark Vivian Pearce | Secretary | 19 Dec 2002 | 23 Jul 2004 | British | - |
| Matthew Nathan Gillen | Director | 30 Sept 2021 | 30 Sept 2025 | British | 42 years |
| Nicola Carol Hopkins | Secretary | 25 Sept 2019 | 25 Feb 2022 | - | - |
| Peter John Reid | Director | 3 Feb 2011 | 28 Feb 2021 | British | 64 years |
| Philip Antony Alvey | Director | 28 Nov 2011 | 1 Dec 2020 | British | 52 years |
| Rajiv Kumar Gopaul | Director | 28 Nov 2011 | 26 Jul 2019 | British | 58 years |
| Robert Hugh Musgrove | Secretary | 17 Dec 1999 | 19 Dec 2002 | Other | - |
| Robert Hugh Musgrove | Secretary | 19 Jul 2005 | 10 Sept 2010 | British | - |
| Romana Lewis | Secretary | 4 Sept 2018 | 25 Sept 2019 | - | - |
| Stephen Andrew Bottomley | Director | 1 Oct 1998 | 2 Jul 1999 | British | 67 years |
| Syeeda Siddiqui | Secretary | 4 Jul 2014 | 22 Sept 2016 | - | - |
| Terence John Day | Director | 17 Dec 1999 | 17 Dec 2003 | British | 78 years |