| Alan William Mcculloch | Secretary | 14 Sept 2007 | 11 Aug 2010 | British | - |
| Alistair Charles Walter Williams | Director | 31 Dec 2005 | 5 Jun 2009 | British | 63 years |
| Andrew Martin-davis | Director | 1 Oct 2004 | 20 Aug 2009 | British | 65 years |
| Ashley Martin Almanza | Director | 1 Dec 1998 | 10 Apr 2001 | Irish | 63 years |
| Brian Ralph Thornley | Director | 25 Oct 1991 | 1 Jun 2001 | British | 80 years |
| Bruno De Almeida Laranjeira | Director | 1 Jun 2018 | 12 Jun 2019 | Portuguese | 45 years |
| Carla Michelle Tully | Director | 27 Jan 2015 | 26 Jun 2017 | Us | 54 years |
| Carol Susan Inman | Secretary | 25 Oct 1991 | 1 Jan 2007 | British | - |
| Desmond Brian King | Director | 25 Oct 1991 | 22 Apr 1999 | British | 78 years |
| Garry Looker | Director | 17 Sept 2002 | 1 Oct 2004 | British | 68 years |
| Heather Spence | Secretary | 26 Jun 2017 | 23 May 2022 | - | - |
| Henry Ten Eyck (jr) Coolidge | Director | 1 Jan 2007 | 31 Mar 2009 | Us Citizen | 67 years |
| Ian Chitty | Director | 28 Mar 2006 | 11 Aug 2010 | British | 58 years |
| Ian Robert Luney | Director | 29 Aug 2014 | 2 Aug 2018 | British | 58 years |
| Ian Robert Luney | Director | 17 Oct 2019 | 8 Dec 2022 | British | 58 years |
| John Charles Earl | Director | 25 Oct 1991 | 8 Jan 2002 | British | 79 years |
| Jonathan Mark Collingwood | Director | 19 Apr 2010 | 11 Aug 2010 | British | 62 years |
| Julian Jose Nebreda Marquez | Director | 1 Oct 2010 | 8 Mar 2016 | Venezuelan | 60 years |
| Julie Leeburn | Secretary | 10 Feb 2012 | 12 Jun 2019 | - | - |
| Kristina Lund | Director | 22 Dec 2017 | 31 May 2018 | American | 49 years |
| Lesley Joyce Hogg | Secretary | 1 Jan 2007 | 31 Mar 2009 | - | - |
| Lesley Joyce Hogg | Director | 31 Mar 2009 | 1 Aug 2012 | British | 57 years |
| Malcolm Sarjeant | Director | 8 Jan 2002 | 31 Mar 2009 | British | 79 years |
| Mark Edward Miller | Director | 11 Aug 2010 | 27 Jan 2015 | American | 65 years |
| Mark Edward Reynolds | Director | 11 Sept 2017 | 22 Dec 2017 | British | 62 years |
| Mark Eugene Green | Director | 18 Apr 2016 | 12 Jun 2019 | American | 59 years |
| Martin William Plackett | Director | 25 Oct 1991 | 14 Sept 1999 | British | 73 years |
| Melvyn Hill | Director | 25 Oct 1991 | 4 Mar 1999 | British | 80 years |
| Melvyn Hill | Director | 31 Mar 2009 | 11 Aug 2010 | British | 80 years |
| Nigel Richard Shaw | Director | 15 Sept 1999 | 17 Jul 2001 | British | 72 years |
| Nigel Robert Darlow | Director | 16 Mar 2004 | 28 Mar 2006 | British | 60 years |
| Paul Anthony Moore | Secretary | 30 Oct 2005 | 14 Sept 2007 | - | - |
| Paul Austin Hutchinson | Secretary | 11 Aug 2010 | 10 Feb 2012 | - | - |
| Peter John Andrew Smith | Director | 1 Jun 2001 | 16 Mar 2004 | Irish | 62 years |
| Richard Jack Souchard | Director | 1 Jan 2007 | 31 Mar 2010 | British | 72 years |
| Richard Scott Berge | Director | 2 Aug 2018 | 12 Jun 2019 | American | 50 years |
| Roger Paul Casement | Director | 11 Aug 2010 | 31 May 2018 | Irish | 63 years |
| Serhiy Zuyev | Director | 2 Aug 2018 | 12 Jun 2019 | Ukrainian | 52 years |
| Stefan Paul Unna | Director | 1 Oct 2010 | 29 Aug 2014 | America | 59 years |
| Stephen John Surrall | Director | 20 Aug 2009 | 11 Aug 2010 | British | 66 years |
| Stephen John Surrall | Director | 17 Jul 2001 | 17 Sept 2002 | British | 66 years |
| Una Markham | Secretary | 31 Mar 2009 | 11 Aug 2010 | - | - |
| William Harvey Adamson | Director | 17 Sept 2002 | 12 Jul 2005 | British | 78 years |