| Andrew James Thompson | Director | 16 Jun 2011 | 18 Sept 2012 | British | 68 years |
| Bernadette Clare Young | Secretary | 12 Dec 2000 | 6 Dec 2001 | British | - |
| Charlotte Dawn Alethea Heiss | Director | 28 May 2020 | 1 Jun 2021 | British | 47 years |
| Denise Patricia Cockrem | Director | 5 Dec 2008 | 16 Jun 2011 | British | 64 years |
| Eric Roland Wills | Secretary | 1 May 1992 | 23 Apr 1997 | British | - |
| Heather Gwendolyn Brierley | Secretary | 15 Sept 2000 | 12 Dec 2000 | British | - |
| Ian Adam Craston | Director | 5 Dec 2008 | 16 Jun 2011 | British | 60 years |
| Ian David Hutchinson | Director | 2 Apr 2004 | 28 Sept 2004 | British | 72 years |
| Jacqueline Elizabeth Fox | Secretary | 3 Jul 2002 | 9 Dec 2005 | British | - |
| James Gregory Jewell | Director | 1 May 1992 | 11 Oct 1996 | British | 84 years |
| Jamie Jeremy Woods | Director | 1 May 1992 | 19 Dec 1997 | British | 85 years |
| Jan Victor Miller | Director | 5 Mar 1998 | 28 Sept 2004 | British | 75 years |
| Jane Carmel Poole | Director | 15 Jun 2020 | 15 Feb 2021 | British | 46 years |
| John Allan Walton | Director | 1 May 1992 | 30 Jun 1995 | British | 76 years |
| John Hilton Berg | Secretary | 31 Jul 1998 | 15 Sept 2000 | British | - |
| Julian Christopher Hance | Director | 29 Jun 2001 | 2 Apr 2004 | British | 71 years |
| Martin Richard Kendall Booth | Director | 1 May 1992 | 31 Aug 1994 | British | 79 years |
| Michael Harris | Director | 5 Dec 2008 | 16 Jun 2011 | British | 61 years |
| Non-destructive Testers Limited | Corporate Director | 2 Apr 2004 | 16 Dec 2008 | United Kingdom | - |
| Paul Lewis Miles | Director | 5 Dec 2008 | 30 Jun 2010 | British | 55 years |
| Paul Mounsey | Director | 16 Jun 2011 | 15 Jun 2020 | British | 59 years |
| Peter Graham Taylor | Director | 1 May 1992 | 31 Aug 1994 | British | 87 years |
| Peter John Fiddimore | Director | 5 Sept 1994 | 31 Dec 1998 | British | 79 years |
| Richard Anthony Eves | Secretary | 24 Apr 1997 | 31 Jul 1998 | British | - |
| Robert John Clayton | Director | 5 Dec 2008 | 16 Jun 2011 | British | 56 years |
| Roysun Limited | Corporate Director | 27 Jul 2004 | 16 Dec 2008 | United Kingdom | - |
| Stewart Thomas Kay | Director | 16 Jun 2011 | 31 Oct 2015 | British | 64 years |
| Suzanne Elizabeth Tiffany | Director | 22 Dec 2015 | 28 May 2020 | British | 48 years |
| Thomas Arthur Hayes | Director | 5 Sept 1994 | 29 Jun 2001 | British | 83 years |
| Thomas Scott Nelson | Director | 1 May 1992 | 5 Mar 1998 | British | 87 years |
| Vanessa Jones | Secretary | 6 Dec 2001 | 26 Apr 2002 | British | - |