| Alison Mary Jones | Secretary | 27 Mar 1996 | 12 Feb 1999 | British | - |
| Amanda Helen Bowe | Director | 1 Oct 2023 | 30 Apr 2024 | British | 58 years |
| Amanda Louise Perrin | Director | 14 Jan 2000 | 27 Oct 2000 | British | 67 years |
| Andrew Seaton Birrell | Director | 27 Jun 2018 | 30 Sept 2023 | British,south African | 57 years |
| Andrew Stephen Melcher | Director | 12 Feb 1999 | 21 Nov 2002 | British | 77 years |
| Anthony Beverley Davidson | Director | 14 Sept 2000 | 1 Jul 2012 | British | 79 years |
| Barry John Blackburn | Director | 14 Jan 2000 | 30 Jul 2001 | British | 76 years |
| Barry John Blackburn | Secretary | 4 May 1991 | 25 Mar 1996 | British | - |
| Bernard Andrew Curran | Director | 9 Apr 2024 | 8 May 2025 | British | 58 years |
| Brid Mary Meaney | Director | 16 Apr 2024 | 19 Aug 2024 | Irish | 52 years |
| Claude James Prieur | Director | 5 May 2000 | 6 Sept 2006 | Us Canadian | 75 years |
| David Hammond | Director | 22 Apr 1995 | 1 Oct 1996 | British | 92 years |
| David Wyndham Davies | Director | 30 Sept 2002 | 1 Apr 2012 | British | 79 years |
| Dean Arthur Connor | Director | 17 Nov 2006 | 31 Dec 2007 | Canadian | 70 years |
| Donald Alexander Stewart | Director | 5 May 2000 | 31 Dec 2017 | British | 80 years |
| Edward Ian Gardner | Director | 12 Sept 2001 | 29 Apr 2005 | British | 67 years |
| Eric Edward Anstee | Director | 1 Jan 2012 | 24 Sept 2019 | British | 75 years |
| George Lester Willman | Director | 22 Apr 1995 | 28 Jun 1996 | British | 86 years |
| Hasan Askari | Director | 17 Nov 2011 | 30 Jun 2017 | British | 81 years |
| Ian Adam Craston | Director | 1 Oct 2023 | 31 Oct 2025 | British | 60 years |
| James Harry Sutcliffe | Director | 20 May 2010 | 31 Dec 2011 | British | 70 years |
| James Harry Sutcliffe | Director | 15 Jul 2017 | 30 Sept 2023 | British | 70 years |
| Janet Christine Fuller | Director | 1 Mar 2002 | 3 May 2013 | British Canadian | 69 years |
| John Arthur Brindle | Director | 4 May 1991 | 22 Apr 1995 | British | 104 years |
| John Duncan Mcneil | Director | 4 May 1991 | 22 Apr 1995 | Canadian | 92 years |
| John Robert Gardner | Director | 4 May 1991 | 22 Apr 1995 | United States And Canadian | 89 years |
| John Robert Lister | Director | 1 Oct 2023 | 24 Aug 2025 | British | 68 years |
| Jon Andrew Boscia | Director | 23 Jul 2010 | 31 Mar 2011 | American | 74 years |
| Jon Andrew Boscia | Director | 25 Aug 2010 | 25 Aug 2010 | American | 74 years |
| Jonathan Charles Hyatt Tate | Director | 22 Apr 1995 | 31 May 1996 | British | 88 years |
| Jonathan Stephen Moss | Director | 31 Jan 2012 | 28 Jun 2018 | British | 63 years |
| Julie Houston | Director | 12 Sept 2001 | 12 Sept 2001 | British | 66 years |
| Katherine Angela Garner | Director | 4 Mar 2010 | 1 Apr 2024 | British | 58 years |
| Margaret Fleur Hobbs | Secretary | 28 Jan 2010 | 1 Apr 2024 | - | - |
| Mark Timothy John Sismey Durrant | Director | 20 Jan 1999 | 1 Oct 1999 | British | 67 years |
| Maurice Edward Bates | Director | 4 May 1991 | 31 Aug 1998 | British | 81 years |
| Neil Leonard Haynes | Director | 29 Apr 2005 | 3 Nov 2008 | Canadian | 67 years |
| Neville Dean Kent | Director | 29 Dec 2009 | 31 Dec 2011 | British | 66 years |
| Nicholas Hugh Poyntz-wright | Director | 1 Oct 2023 | 31 Dec 2024 | British | 63 years |
| Paul John Davies | Director | 14 Jan 2000 | 28 Feb 2003 | British | 75 years |
| Paul Sharman | Director | 21 Jun 1996 | 1 Sept 1998 | British | 74 years |
| Peter Brian Baxendell | Director | 4 May 1991 | 22 Apr 1995 | British | 101 years |
| Peter Nicholas Hanby | Director | 14 Jan 2000 | 30 Sept 2002 | British | 77 years |
| Philip Harding Green | Director | 31 Dec 1996 | 13 Nov 1998 | British | 74 years |
| Philip Martin Lockyer | Director | 14 Jan 2000 | 2 Jul 2001 | British | 74 years |
| Rakesh Kishore Thakrar | Director | 1 Apr 2024 | 31 Jul 2024 | British | 51 years |
| Richard Arthur Brealey | Director | 15 Jul 1994 | 22 Apr 1995 | British | 90 years |
| Richard William Shelmerdine Baker | Director | 4 May 1991 | 31 Dec 1996 | British | 93 years |
| Robert Edward Stuart Littlejohn | Secretary | 12 Feb 1999 | 28 Jan 2010 | British | - |
| Robert George Meek | Director | 31 Dec 1996 | 22 Jan 1999 | British | 86 years |
| Robert John Sharkey | Director | 3 Nov 2008 | 30 Nov 2010 | Canadian | 78 years |
| Robert Paul Reid | Director | 5 May 2000 | 1 Apr 2008 | British | 92 years |
| Robert Salipante | Director | 1 Nov 2008 | 30 Oct 2009 | American | 70 years |
| Stephen Mark Coombes | Director | 25 Sept 2013 | 29 Feb 2016 | British | 69 years |
| Stuart Terence Hill | Director | 1 Aug 1996 | 19 Jul 2001 | British | 67 years |
| Thomas Maunsel Galt | Director | 4 May 1991 | 15 Jul 1994 | Canadian | 105 years |
| Timothy John Bateman | Director | 12 Sept 2001 | 1 Mar 2002 | British | 68 years |
| Tracy Dunley-owen | Director | 27 Mar 2019 | 30 Sept 2023 | British,south African | 54 years |
