| Bernadette Allinson | Secretary | 5 Oct 2007 | 15 Jun 2015 | Other | - |
| Bruce Dugald Macphail | Director | 24 May 1992 | 1 Aug 1997 | British | 86 years |
| David Edward Alban Morris | Director | 1 Oct 1992 | 1 Aug 1997 | British | 90 years |
| David Jack Leonard | Director | 8 Dec 2004 | 31 Aug 2006 | British | 65 years |
| David Jack Leonard | Secretary | 8 Dec 2004 | 31 Aug 2006 | British | - |
| Derek Shaw | Director | 30 Jun 2006 | 23 Apr 2007 | British | 70 years |
| Flemming Dalgaard | Director | 16 Apr 2008 | 17 Jan 2014 | Danish | 61 years |
| Ganesh Raj Jayaraman | Director | 17 Jan 2014 | 16 Apr 2018 | Australian | 61 years |
| Hugh Martin Saunders | Director | 24 May 1992 | 1 Oct 1992 | British | 83 years |
| John Mark Woollacott | Director | 23 Apr 2007 | 11 May 2010 | Australian | 54 years |
| John Michael Laver | Director | 31 Oct 2000 | 20 Apr 2001 | British | 83 years |
| John Michael Laver | Secretary | 31 Oct 2000 | 20 Apr 2001 | British | - |
| Mantraraj Dipak Budhdev | Director | 25 Jun 2019 | 25 Nov 2021 | British | 39 years |
| Michael Ellis Moore | Director | 30 Jun 2006 | 15 Oct 2008 | American | 69 years |
| Michael Owen | Director | 1 Aug 1997 | 31 Oct 2000 | British | 83 years |
| Michael Owen | Secretary | 24 May 1992 | 31 Oct 2000 | British | - |
| Mohammad Alhashimy | Secretary | 15 Jun 2015 | 19 Jul 2023 | - | - |
| Mohammad Ebrahim Ali Alhashimy | Director | 25 Jun 2019 | 19 Jul 2023 | British | 40 years |
| Nicholas Haydn Glyndwr Rees | Secretary | 31 Aug 2006 | 23 Apr 2007 | British | - |
| Nicholas John Monteith | Director | 1 Aug 1997 | 31 May 2002 | British | 72 years |
| Patrick William Walters | Director | 23 Apr 2007 | 16 Apr 2008 | British | 59 years |
| Peter Arthur Walker | Director | 31 May 2002 | 1 Nov 2013 | British | 72 years |
| Richard Michael Gradon | Director | 1 Aug 1997 | 30 Jun 2006 | British | 66 years |
| Sameer Dileep Damle | Secretary | 23 Apr 2007 | 5 Oct 2007 | British | - |
| Sandra Scott | Director | 24 Apr 2001 | 8 Dec 2004 | British | 60 years |
| Sandra Scott | Secretary | 24 Apr 2001 | 8 Dec 2004 | British | - |
| Sarmad Mehmood Qureshi | Director | 11 May 2010 | 26 Jul 2019 | British | 55 years |
| Sterling Of Plaistow Quennells | Director | 24 May 1992 | 1 Aug 1997 | British | 91 years |
| Timothy John Randolph Harding | Director | 24 May 1992 | 1 Aug 1997 | British | 85 years |