| Alan James Mcwalter | Director | 28 Jan 2000 | 10 Jul 2002 | British | 73 years |
| Alistair Graham Milne | Director | 25 Apr 2002 | 4 Feb 2005 | British | 66 years |
| Andrew Douglas Van Den Aardweg | Director | 17 Jul 2015 | 18 Jun 2020 | South African,british | 72 years |
| Andrew John Ripley | Director | 20 Feb 2008 | 24 Sept 2009 | British | 60 years |
| Andrew Ray Mielczarek | Director | 21 Apr 2005 | 20 Feb 2007 | British | 56 years |
| Barrie John Wells | Director | 4 Jan 2000 | 31 Dec 2009 | British | 86 years |
| Brendan Alistair Cook | Director | 9 Dec 2004 | 1 Jan 2009 | British | 64 years |
| Christine Dora Haslam | Director | 9 Nov 2009 | 28 Feb 2011 | British | 61 years |
| Christopher Meehan | Secretary | 3 Jul 2018 | 22 Mar 2019 | - | - |
| Colin Martin Kersley | Director | 11 Feb 2009 | 22 May 2014 | British | 70 years |
| Crawford Peter Prentice | Director | 4 Mar 2010 | 11 Dec 2014 | British | 53 years |
| David Charles Budd | Director | 22 Sept 2005 | 1 Oct 2007 | British | 73 years |
| David Johnstone Mackay | Director | 28 Jul 2005 | 21 Aug 2006 | British | 68 years |
| David Malcolm Towell | Director | 15 Aug 1991 | 31 Dec 2001 | British | 80 years |
| David Stewart | Director | 1 Jul 2014 | 13 May 2020 | British | 61 years |
| David William Lister | Director | 20 Sept 2019 | 24 Apr 2024 | British | 68 years |
| Denise Mary Holt | Director | 1 Aug 2013 | 19 Sept 2019 | British | 77 years |
| Dyfrig Dafydd Joseff John | Director | 25 Apr 2005 | 9 Feb 2006 | British | 76 years |
| Edward Brian Nott | Director | 1 Aug 2002 | 10 Dec 2007 | British | 67 years |
| Gev Lynott | Director | 24 Nov 2000 | 19 Jul 2002 | British | 63 years |
| Graham John Oakley | Secretary | 15 Aug 1991 | 18 Oct 1991 | British | - |
| Ian Derek Cordwell | Director | 22 Feb 1999 | 30 Apr 1999 | British | 63 years |
| James Coyle | Director | 11 Jan 2016 | 24 Apr 2024 | British | 70 years |
| James Richard Benfield | Director | 26 Mar 1999 | 31 Dec 1999 | British | 77 years |
| John Allan Walton | Director | 14 Sept 1999 | 7 Nov 2004 | British | 76 years |
| John Keith Oates | Director | 15 Aug 1991 | 31 Jan 1999 | British | 84 years |
| Johnson Daniel Garner | Director | 9 Feb 2006 | 2 Feb 2011 | British | 57 years |
| Kate Elizabeth Hudson | Secretary | 22 Sept 2010 | 26 Sept 2013 | - | - |
| Katie Lewis | Secretary | 22 Mar 2019 | 11 Feb 2020 | - | - |
| Keith Woollard | Director | 1 Dec 2011 | 8 Dec 2015 | British | 72 years |
| Kelley Craig Knutson | Director | 21 Mar 2002 | 31 Dec 2009 | British | 66 years |
| Kenneth Culley | Director | 22 Sept 2000 | 12 Dec 2013 | British | 84 years |
| Laurel Claire Powers-freeling | Director | 6 Nov 2001 | 7 Nov 2004 | British | 69 years |
| Luc Emile Vandevelde | Director | 1 Sept 2002 | 3 Oct 2003 | Belgian | 75 years |
| Marcus John Joseph Reynolds Golby | Director | 28 Jul 2008 | 25 Mar 2011 | British | 56 years |
| Margaret Dunbar | Director | 22 Feb 1999 | 4 Jan 2002 | British | 74 years |
| Mark John Thundercliffe | Director | 17 May 2012 | 22 Jun 2016 | British | 61 years |
| Mary Josephine Margaret Mcnalty | Secretary | 26 Sept 2013 | 11 Dec 2014 | - | - |
| Matthew Alexander Granger Handley | Director | 1 Nov 2015 | 25 May 2020 | British | 47 years |
| Michael Adrian Johnson | Director | 15 Aug 1991 | 31 Mar 1993 | British | 82 years |
| Neville Brian Richardson | Director | 9 Feb 2012 | 18 Jun 2013 | British | 69 years |
| Nigel Grant Hinshelwood | Director | 28 Sept 2011 | 30 May 2018 | British | 60 years |
| Paul Kenneth Seward | Director | 11 Nov 2016 | 30 Nov 2017 | British | 70 years |
| Paul Michael Spencer | Director | 20 Feb 2008 | 7 Sept 2009 | British | 56 years |
| Paul Michael Spencer | Director | 1 Feb 2019 | 5 Dec 2024 | British | 56 years |
| Paul Richard Bradshaw | Director | 28 May 2003 | 31 May 2005 | British | 76 years |
| Pauline Louise Mcquillan | Secretary | 23 Jul 2008 | 24 Sept 2009 | British | - |
| Peter Harvey Green | Secretary | 24 Aug 1999 | 16 Jun 2005 | British | - |
| Peter James Harvey | Secretary | 16 Jun 2005 | 23 Jul 2008 | Other | - |
| Peter Leslie Salsbury | Director | 31 Mar 1993 | 22 Feb 1999 | British | 77 years |
| Peter Michael Shawyer | Director | 1 Aug 2013 | 4 Mar 2015 | British | 76 years |
| Peter Simon Fennell | Director | 22 Feb 1999 | 30 Apr 2002 | British | 64 years |
| Philip Guy Mccracken | Director | 15 Aug 1991 | 22 Feb 1999 | British | 78 years |
| Philip Henry George Sellwood | Director | 22 Feb 1999 | 31 Oct 2000 | British | 72 years |
| Richard Ian Waugh | Director | 22 Feb 1999 | 20 Aug 1999 | British | 63 years |
| Richard Ian Waugh | Director | 28 Jul 2005 | 10 Dec 2007 | British | 63 years |
| Robert Hugh Musgrove | Secretary | 24 Sept 2009 | 22 Sept 2010 | British | - |
| Robert John Ivens | Secretary | 18 Oct 1991 | 24 Aug 1999 | British | - |
| Robert William Chaigneau Colvill | Director | 15 Aug 1991 | 31 Aug 2002 | British | 86 years |
| Roger Anthony Holmes | Director | 3 Oct 2003 | 31 May 2004 | British | 66 years |
| Roy Henry Ranson | Director | 22 Feb 1999 | 28 May 2003 | British | 96 years |
| Sally Anne Cohen | Director | 9 Feb 2012 | 28 Feb 2013 | British /american | 68 years |
| Sean Patrick O'sullivan | Director | 15 Nov 2007 | 31 Jan 2011 | Canadian | 70 years |
| Simon Leslie Rushton | Director | 23 Sept 1999 | 24 Nov 2000 | British | 65 years |
| Stuart Arthur Haire | Director | 1 Dec 2017 | 18 Jun 2020 | British | 52 years |
| Suzanne Fox | Director | 22 May 2014 | 31 Jan 2019 | British | 57 years |
| Syeeda Ollite | Secretary | 11 Dec 2014 | 3 Jul 2018 | - | - |