| Alejandro Russo | Director | 2 Feb 2014 | 31 Jul 2018 | British | 55 years |
| Alexander Daniel Keeler Simpson | Director | 11 Dec 2017 | 27 Aug 2019 | British | 53 years |
| Alexander Simpson | Secretary | 1 Jun 2013 | 27 Aug 2019 | - | - |
| Allan Leslie Leighton | Director | 10 Oct 1992 | 3 Nov 2000 | British | 73 years |
| Andrew James Bond | Director | 20 Jan 2003 | 1 Jan 2011 | British | 61 years |
| Andrew James Clarke | Director | 5 Sept 2005 | 25 Jul 2016 | British | 62 years |
| Andrew James Clarke | Director | 18 Dec 2000 | 5 Jun 2002 | British | 62 years |
| Andrew Jeffrey Moore | Director | 30 Mar 2010 | 31 Dec 2017 | British | 69 years |
| Andrew Murray | Director | 18 Apr 2016 | 31 Mar 2020 | American | 63 years |
| Angela Lesley Spindler | Director | 14 Jan 2002 | 3 Aug 2007 | British | 64 years |
| Anna-maree Shaw | Director | 20 Jan 2020 | 4 Dec 2020 | British | 54 years |
| Anthony Denunzio | Director | 15 Sept 1998 | 1 Apr 2005 | British | 66 years |
| Anthony Joseph Thompson | Director | 17 Sept 2007 | 30 Mar 2010 | British | 62 years |
| Anthony Robert Page | Director | 1 Jan 2005 | 30 Jun 2006 | British | 60 years |
| Anthony Stuart Hemmerdinger | Director | 31 Dec 2017 | 3 Sept 2021 | British | 57 years |
| Archibald John Norman | Director | 10 Oct 1992 | 1 Nov 1999 | British | 72 years |
| Barry Paul Inman Williams | Director | 18 Feb 2013 | 8 Feb 2016 | British | 56 years |
| Charles Robert Redfield | Director | 18 Oct 2010 | 22 May 2012 | American | 59 years |
| Chittaranjan Kuchinad | Director | 1 Dec 2009 | 14 Mar 2011 | British | 68 years |
| Darren Blackhurst | Director | 9 Jan 2006 | 14 Oct 2010 | British | 60 years |
| David Alexander Hills | Director | 8 Jul 2024 | 23 May 2025 | British | 52 years |
| David Cheesewright | Director | 19 Sept 2005 | 1 Jan 2008 | British | 64 years |
| David Cheesewright | Director | 20 Jan 2003 | 1 Oct 2004 | British | 64 years |
| David Downie | Director | 20 Jan 2003 | 1 Jul 2005 | British | 61 years |
| David James Dible | Director | 1 Nov 1999 | 1 Sept 2005 | American | 79 years |
| David Obrien | Director | 10 Oct 1992 | 20 Sept 1995 | British | 85 years |
| David Sinclair Ferguson | Director | 18 Dec 2000 | 1 Oct 2001 | United States | 81 years |
| David Smith | Director | 18 Dec 2000 | 31 Jan 2009 | British | 70 years |
| Denise Nichola Jagger | Secretary | 3 Feb 1993 | 22 Dec 2003 | British | - |
| Derek Christopher Lawlor | Director | 22 May 2019 | 4 Jan 2022 | Irish | 54 years |
| Douglas John Gurr | Director | 24 Sept 2007 | 1 Jan 2011 | British | 62 years |
| Eleanor Doohan | Secretary | 25 Jan 2008 | 1 Jun 2013 | British | - |
| Eleanor Doohan | Director | 3 Oct 2011 | 1 Jun 2013 | British | 56 years |
| Francis Anthony Aylmer Maude | Director | 10 Oct 1992 | 10 Sept 1999 | British | 73 years |
| Francis William Knight | Director | 10 Oct 1992 | 4 Jun 1999 | British | 90 years |
| Gary Lindsay | Director | 18 Jun 2021 | 19 Dec 2023 | British | 47 years |
| Harold Lee Scott Jr | Director | 1 Nov 1999 | 1 Sept 2005 | American | 77 years |
| Hayley Marie Tatum | Director | 3 Oct 2011 | 21 Nov 2016 | British | 57 years |
| Hayley Marie Tatum | Director | 3 Oct 2011 | 11 Apr 2025 | British | 57 years |
| Ian Gibson | Director | 1 Oct 1993 | 10 Sept 1999 | British | 79 years |
| Ian Robinson | Director | 26 Jun 1997 | 10 Sept 1999 | British | 84 years |
| Jesús Lorente Lopez | Director | 18 Sept 2017 | 31 Jul 2018 | Spanish | 63 years |
| John Bruce Menzer | Director | 1 Nov 1999 | 1 Sept 2005 | American | 75 years |
| John Fallon | Director | 31 Jul 2021 | 18 Jul 2022 | British | 56 years |
| John Longworth | Director | 22 Dec 2003 | 25 Jan 2008 | British | 68 years |
| John Longworth | Secretary | 22 Dec 2003 | 25 Jan 2008 | British | - |
| Judith Jane Mckenna | Director | 20 Jan 2003 | 22 Mar 2013 | British | 60 years |
| Karen Rachael Hubbard | Director | 3 Oct 2011 | 31 Mar 2014 | British | 62 years |
| Lloyd Anthony Campbell | Director | 10 Oct 1992 | 2 Mar 2001 | British | 77 years |
| Manjit Dale | Director | 18 Jun 2021 | 19 Dec 2023 | British | 61 years |
| Mark Ibbotson | Director | 28 Jan 2013 | 27 Feb 2015 | British | 63 years |
| Mark Ogilvie Simpson | Director | 20 Jan 2020 | 8 Jul 2024 | British | 52 years |
| Martin Peter Read | Director | 1 Mar 1996 | 10 Sept 1999 | British | 76 years |
| Michael Andrew Coupe | Director | 15 Sept 1998 | 9 Jul 2001 | British | 66 years |
| Mohsin Issa | Director | 18 Jun 2021 | 19 Dec 2024 | British | 55 years |
| Nicholas David George Jones | Director | 21 May 2018 | 30 Jun 2019 | British | 54 years |
| Patrick John Gillam | Director | 10 Oct 1992 | 13 Dec 1996 | British | 93 years |
| Paul Mason | Director | 28 Oct 1997 | 23 Oct 2001 | British | 66 years |
| Peter Pritchard | Director | 30 Oct 2006 | 30 Jul 2008 | British | 56 years |
| Peter William Monaghan | Director | 1 Jun 1993 | 31 Dec 1993 | British | 79 years |
| Philip Robert Cox | Director | 10 Oct 1992 | 12 Dec 1998 | British | 76 years |
| Philip Robert Cox | Secretary | 10 Oct 1992 | 3 Feb 1993 | British | - |
| Philip Titchmarsh | Secretary | 27 Aug 2019 | 6 Apr 2020 | - | - |
| Richard Andrew Mayfield | Director | 16 Nov 2012 | 2 Feb 2014 | British | 57 years |
| Richard Baker | Director | 1 Nov 1999 | 15 Sept 2003 | British | 64 years |
| Richard Conway North | Director | 21 Mar 1997 | 10 Sept 1999 | British | 76 years |
| Richard Nigel Bendel | Director | 20 Nov 2006 | 30 Apr 2012 | British | 68 years |
| Robert Gerard Mcwilliam | Director | 3 Sept 2018 | 31 Jul 2021 | British | 57 years |
| Roger Michael Burnley | Director | 21 Nov 2016 | 6 Aug 2021 | British | 60 years |
| Roney Godfrey Collumbell Messervy | Director | 10 Oct 1992 | 17 Nov 1993 | British | 102 years |
| Sean John Clarke | Director | 11 Jul 2016 | 31 Dec 2017 | British | 58 years |
| Simon Theodore King | Director | 28 Feb 2011 | 11 Jul 2011 | British | 67 years |
| Steve Smith | Director | 14 May 2012 | 29 Apr 2015 | American | 56 years |
| Steven Anthony Cain | Director | 28 Oct 1997 | 30 Nov 1998 | British | 62 years |
| Steven John Nuttall | Director | 18 Jul 2022 | 24 May 2023 | British | 50 years |
| Susan Caroline Ellen | Director | 10 Oct 1992 | 15 Sept 1998 | British | 78 years |
| Susan Myfanwy Tinson | Director | 19 Jan 1998 | 10 Sept 1999 | British | 83 years |
| Zuber Vali Issa | Director | 18 Jun 2021 | 31 Oct 2024 | British | 54 years |