| Andrew John Robertson | Secretary | 16 Jun 2000 | 31 Mar 2002 | British | - |
| Bernadette Allinson | Secretary | 5 Oct 2007 | 15 Jun 2015 | Other | - |
| Calum Stuart Macdonald | Director | 6 Jun 1991 | 30 Jun 1991 | British | 80 years |
| Cecil Scott Colegate | Director | 6 Jun 1991 | 1 Jun 2001 | British | 78 years |
| Charles Gordon Clark | Secretary | 11 Nov 1996 | 16 Jun 2000 | British | - |
| Charles Howard Cunningham | Director | 11 Nov 1996 | 30 Dec 2002 | British | 81 years |
| David Jack Leonard | Secretary | 8 Dec 2004 | 31 Aug 2006 | British | - |
| Derek Shaw | Director | 30 Jun 2006 | 23 Apr 2007 | British | 71 years |
| Eric Mckenzie Turner | Director | 6 Jun 1991 | 13 May 1992 | British | 98 years |
| Flemming Dalgaard | Director | 16 Apr 2008 | 17 Jan 2014 | Danish | 62 years |
| Ganesh Raj Jayaraman | Director | 17 Jan 2014 | 16 Apr 2018 | Australian | 62 years |
| Graeme Dermott Stuart Dunlop | Director | 6 Jun 1991 | 31 Dec 2002 | British | 84 years |
| Howard Stapleton | Director | 14 Sept 1993 | 24 May 1996 | British | 76 years |
| Howard Stapleton | Director | 14 Aug 1996 | 4 Mar 2004 | British | 76 years |
| John Mark Woollacott | Director | 23 Apr 2007 | 11 May 2010 | Australian | 55 years |
| Mantraraj Dipak Budhdev | Director | 25 Jun 2019 | 25 Nov 2021 | British | 40 years |
| Michael Ellis Moore | Director | 30 Jun 2006 | 15 Oct 2008 | American | 70 years |
| Michael George Reid Brown | Secretary | 6 Jun 1991 | 10 Nov 1996 | British | - |
| Mohammad Alhashimy | Secretary | 15 Jun 2015 | 20 Jul 2023 | - | - |
| Mohammad Ebrahim Ali Alhashimy | Director | 25 Jun 2019 | 20 Jul 2023 | British | 41 years |
| Nicholas Haydn Glyndwr Rees | Secretary | 31 Aug 2006 | 23 Apr 2007 | British | - |
| Patrick William Walters | Director | 23 Apr 2007 | 16 Apr 2008 | British | 60 years |
| Peter Arthur Walker | Director | 27 Aug 2010 | 1 Nov 2013 | British | 73 years |
| Richard Michael Gradon | Director | 13 Feb 2004 | 30 Jun 2006 | British | 67 years |
| Sameer Dileep Damle | Secretary | 23 Apr 2007 | 5 Oct 2007 | British | - |
| Sandra Scott | Secretary | 31 Mar 2002 | 8 Dec 2004 | British | - |
| Sarmad Mehmood Qureshi | Director | 11 May 2010 | 25 Jun 2019 | British | 56 years |
| Terence Charles Cairns | Director | 13 May 1992 | 27 Aug 2010 | British | 79 years |