| Alan Pascoe Collett | Director | 4 Oct 2012 | 28 Feb 2014 | British | 74 years |
| Brian Anthony Jolly | Director | 16 Jun 2000 | 10 Jul 2012 | British | 80 years |
| Brian Leslie Smith | Director | 8 Sept 2011 | 28 Feb 2014 | British | 66 years |
| Conor Matthew O'shaughnessy | Director | 1 Mar 2014 | 10 Nov 2014 | Irish | 64 years |
| David Hancock | Director | 6 Oct 2004 | 7 Feb 2007 | British | 75 years |
| David Keith Gannicott | Director | 7 Nov 2013 | 31 Mar 2019 | British | 67 years |
| David Nigel Geoffrey Small | Director | 16 Jun 2000 | 6 Oct 2004 | British | 82 years |
| Debra Ann Small | Director | 1 Mar 2014 | 7 Oct 2019 | British | 67 years |
| Gary Adam Lawson | Director | 9 Feb 2005 | 16 Oct 2009 | British | 62 years |
| Guy Kingsley Slocombe | Director | 29 Apr 2019 | 30 Jan 2025 | British | 58 years |
| Guy William Flynn | Director | 23 Feb 2023 | 23 Aug 2024 | British | 44 years |
| Ian Hagger | Director | 28 Mar 2007 | 13 Aug 2010 | British | 65 years |
| Jacob Harvey Goulde | Director | 20 Feb 2008 | 17 Feb 2011 | British | 67 years |
| Jane Elizabeth Jenkinson | Director | 10 Feb 2010 | 26 Mar 2012 | British | 60 years |
| Jeremy Guy Sumeray | Director | 20 Feb 2008 | 17 Feb 2011 | British | 66 years |
| John Alfred Neville Tibbitts | Director | 19 Sept 2012 | 30 Jun 2013 | British | 70 years |
| John Mark Edwards | Secretary | 28 Jan 2004 | 31 May 2018 | British | - |
| John Warburton Unsworth | Director | 9 Feb 2009 | 10 Feb 2010 | Other | 72 years |
| Kerry Andrew Tromanhauser | Secretary | 1 Jun 2018 | 23 Sept 2019 | - | - |
| Maeve Natalie Maiella Feeny | Director | 16 Jun 2000 | 17 Feb 2011 | British | 73 years |
| Michael Richard Johnson | Director | 3 Oct 2014 | 22 Dec 2017 | British | 58 years |
| Nicholas John Badman | Director | 17 Feb 2011 | 28 Feb 2014 | British | 64 years |
| Peter Robert Denton | Director | 16 Feb 2017 | 14 Sept 2020 | British | 54 years |
| Prodaman Kumar Sarwal | Director | 17 Feb 2011 | 28 Feb 2014 | British | 74 years |
| Raymond Gary Christopher | Director | 10 Nov 2014 | 31 Mar 2018 | British | 60 years |
| Richard Michael Reger | Secretary | 13 Nov 2000 | 3 Oct 2003 | British | - |
| Sarah Caroline Titley | Secretary | 16 Jun 2000 | 13 Nov 2000 | British | - |
| Sarah Caroline Titley | Secretary | 3 Oct 2003 | 28 Jan 2004 | British | - |
| Sharon Margaret Pearce | Director | 31 Mar 2018 | 16 Dec 2024 | British | 58 years |
| Simon Peacock | Director | 5 May 2011 | 31 Dec 2015 | British | 54 years |
| Simon William Vevers | Director | 1 Mar 2014 | 18 Jun 2021 | British | 54 years |
| Stephen Mcmorris | Director | 4 Nov 2019 | 21 Feb 2022 | British | 54 years |
| Stephen White | Director | 25 Apr 2012 | 19 Sept 2012 | British | 60 years |
| Susan Harvey | Director | 6 Oct 2004 | 16 Sept 2007 | British | 63 years |
| Thomas Edward Shaw | Director | 1 Mar 2014 | 15 Aug 2019 | British | 47 years |
| Thomas Gore Titherington | Director | 28 Mar 2007 | 23 Jan 2009 | British | 67 years |
| Timothy Andrew Ayre | Director | 20 Feb 2008 | 17 Feb 2011 | British | 70 years |
| Tracy Helen Allison | Director | 1 Mar 2014 | 16 Oct 2019 | British | 60 years |
| Valerie Ann Stead | Director | 6 Oct 2004 | 7 Feb 2007 | British | 85 years |
| Zoe Ollerearnshaw | Secretary | 23 Sept 2019 | 9 Sept 2024 | - | - |