| Afshan Rathore | Secretary | 19 May 2017 | 12 Jul 2018 | - | - |
| Ana Louise Jordan | Secretary | 21 Jun 2022 | 12 Sept 2024 | - | - |
| Anthony Graham Cropper | Director | 1 Jun 1991 | 3 Jul 1998 | British | 87 years |
| Anthony Roger Thornett | Director | 1 Jan 1994 | 12 May 1998 | British | 70 years |
| Bruce Ian Marsh | Director | 5 May 2005 | 1 Nov 2006 | British | 61 years |
| Carol Ann Ridlington | Director | 26 May 2006 | 1 Nov 2006 | British | 64 years |
| Christopher Marshall Bates | Director | 1 Nov 2002 | 1 Nov 2006 | British | 60 years |
| Christopher Spencer | Director | 22 Sept 2020 | 31 Oct 2022 | British | 56 years |
| David Andrew Lowe | Director | 31 Jan 2022 | 31 Aug 2022 | British | 59 years |
| David James Jackman | Director | 25 Jan 2011 | 30 Sept 2016 | British | 65 years |
| David John Etherington | Director | 27 Mar 2014 | 4 Apr 2021 | British | 68 years |
| David White | Director | 1 Nov 2002 | 13 Mar 2017 | British | 60 years |
| Deborah Lee Davis | Director | 1 Sept 2024 | 18 Mar 2025 | British | 62 years |
| Dennis Gerald Green | Director | 21 Aug 1996 | 25 Feb 1997 | British | 72 years |
| Donald Mackechnie | Director | 2 Dec 2022 | 31 Aug 2024 | British | 52 years |
| Dudley Mark Hewitt Skinner | Director | 27 Mar 2014 | 30 Jan 2017 | British | 69 years |
| Dudley Mark Hewitt Skinner | Director | 2 Dec 2022 | 31 Aug 2024 | British | 69 years |
| Elaine Turtle | Director | 5 May 2005 | 1 Nov 2006 | British | 63 years |
| Gary Dixon | Director | 28 Jul 2010 | 31 Oct 2012 | British | 61 years |
| George Mcgrady | Director | 15 Mar 2010 | 23 May 2013 | British | 58 years |
| George Mcgrady | Secretary | 30 Sept 2014 | 23 Jul 2015 | - | - |
| Inez Mary Peach | Secretary | 1 Jun 1991 | 13 Oct 1993 | British | - |
| Jacqueline Leiper | Director | 31 Oct 2022 | 31 Aug 2024 | British | 53 years |
| Jacqueline Lowe | Director | 1 Feb 2023 | 30 Sept 2023 | British | 59 years |
| James Henry Wilkinson | Director | 25 Nov 1997 | 3 Jul 1998 | British | 59 years |
| Jeremy Southall | Director | 1 Jan 1994 | 20 Mar 1996 | British | 60 years |
| Jo Ke | Director | 18 May 2010 | 18 May 2010 | Br | 69 years |
| Joanna Kate Harris | Director | 1 Sept 2024 | 4 Jun 2025 | British | 52 years |
| John Leslie Kennedy | Secretary | 6 Aug 2009 | 29 Aug 2014 | British | - |
| John Martin Withers | Secretary | 14 Oct 1993 | 3 Jul 1998 | British | - |
| John Michael Jennings | Director | 1 Aug 2012 | 8 Mar 2013 | British | 66 years |
| Jonathan Anderson | Director | 26 May 2022 | 31 Aug 2024 | British | 70 years |
| Jonathan Scott Wheway | Director | 1 Sept 2024 | 31 Oct 2025 | British | 59 years |
| Kevin Wells | Director | 24 May 2005 | 1 Nov 2006 | British | 66 years |
| Mark Christopher Stubbs | Director | 24 Oct 1991 | 10 Feb 2006 | British | 63 years |
| Mary Stewart | Director | 19 Jun 2008 | 23 May 2013 | British | 61 years |
| Michael Francis Ward | Director | 1 Jun 1991 | 30 Jun 1994 | British | 74 years |
| Michael John Hemlin | Director | 26 Jun 1998 | 17 May 2004 | British | 62 years |
| Neil Duncan Marsh | Director | 21 Aug 1996 | 25 Feb 1997 | British | 64 years |
| Neil Duncan Marsh | Director | 26 Jun 1998 | 22 May 2008 | British | 64 years |
| Nenette Scrivener | Director | 11 Sept 2006 | 24 Jul 2009 | British | 61 years |
| Nenette Scrivener | Secretary | 14 Nov 2006 | 24 Jul 2009 | British | - |
| Nicola Megaw | Secretary | 8 Dec 2020 | 21 Jun 2022 | - | - |
| Nigel John Webber | Director | 27 Mar 2014 | 30 Jan 2017 | British | 72 years |
| Paul Anthony Turtle | Director | 18 May 2010 | 18 May 2010 | British | 77 years |
| Paul Anthony Turtle | Director | 18 May 2010 | 25 Jan 2011 | British | 77 years |
| Paul Downing | Director | 3 Apr 2017 | 31 Jan 2022 | British | 70 years |
| Paul Mcmahon | Director | 26 May 2022 | 31 Aug 2024 | British | 62 years |
| Peter Robert Green | Director | 21 Jun 2007 | 31 Aug 2013 | English | 71 years |
| Peter Stephen Rigby | Director | 1 Jun 1991 | 3 Jul 1998 | British | 70 years |
| Phillip Smith | Director | 23 May 2013 | 31 Dec 2019 | British | 57 years |
| Priscilla Ann Davies | Director | 2 Dec 2022 | 30 Jun 2023 | British | 54 years |
| Richard Leslie Martin Wohanka | Director | 23 May 2013 | 20 Mar 2017 | British | 73 years |
| Robert Kelly Adams | Director | 16 Apr 2015 | 17 Nov 2019 | English | 64 years |
| Sanjaykumar Pancholi | Secretary | 1 Jul 1998 | 14 Nov 2006 | British | - |
| Scott Cameron Guild | Director | 31 Jan 2022 | 31 Aug 2024 | British | 58 years |
| Sean Bowker Haswell | Director | 1 Aug 2012 | 23 May 2013 | British | 67 years |
| Sophie Jane O'connor | Director | 2 Dec 2022 | 30 Sept 2023 | British | 55 years |
| Stella Croot | Director | 12 Dec 2012 | 23 May 2013 | British | 58 years |
| Stephen Luigi Bertuzzi | Director | 19 Jun 2008 | 9 Feb 2010 | British | 58 years |
| Stephen Rees | Director | 1 Jun 1991 | 31 Mar 1993 | British | 64 years |
| Stephen Richard Hornbuckle | Director | 1 Jun 1991 | 1 Dec 2003 | British | 80 years |
| Steven Mitchell | Director | 1 Jun 1991 | 3 Apr 1994 | British | 76 years |
| Susan Deborah Busfield | Director | 26 May 2006 | 6 Sept 2007 | British | 67 years |
| Trevor Newton Denison | Director | 1 Jun 1991 | 16 Apr 2008 | British | 75 years |
| Vincent Philippe Francois Cambonie | Director | 21 Feb 2017 | 31 Jan 2022 | French | 60 years |
| Vincent Philippe Francois Cambonie | Secretary | 12 Jul 2018 | 8 Dec 2020 | - | - |
| Vivienne Belcher | Director | 1 Nov 2002 | 1 Nov 2006 | British | 68 years |
| Vivienne Belcher | Director | 20 Mar 2008 | 31 Dec 2009 | British | 68 years |
| Wendy Jayne Sanderson | Director | 26 May 2006 | 1 Nov 2006 | British | 53 years |
