| Aderemi Ladega | Secretary | 11 Apr 2005 | 30 Jun 2010 | British | - |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 11 Apr 2005 | Other | - |
| Brian Michael Puffer | Director | 1 Jan 2010 | 6 Feb 2018 | British,american | 57 years |
| Brian Peevor | Secretary | 9 Feb 1994 | 31 Aug 1997 | British | - |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| David Hulf | Director | 1 Dec 2002 | 30 Dec 2004 | British | 76 years |
| David Sinclair Mace | Director | 22 Sept 1993 | 30 Dec 1996 | British | 89 years |
| Dennis Bryant | Director | 27 Jul 1992 | 22 Sept 1993 | British | 86 years |
| Donald Price | Director | 27 Jul 1992 | 30 May 1993 | British | 73 years |
| Douglas Patrick Chapman | Director | 6 Aug 1997 | 1 Dec 2002 | British | 76 years |
| Francis William Michael Starkie | Director | 31 Dec 1996 | 30 Sept 2009 | British | 77 years |
| Gillian Elizabeth Young | Secretary | 27 Jul 1992 | 9 Feb 1994 | British | - |
| Iain Fraser Macdonald | Director | 30 Dec 2004 | 31 Dec 2009 | British | 69 years |
| Jens Bertelsen | Director | 17 Apr 2018 | 17 Dec 2019 | British | 67 years |
| John Christopher Withey | Director | 30 May 1993 | 29 Aug 2008 | British | 76 years |
| Kenneth Charles John Wraxall Hunter | Director | 22 Sept 1993 | 5 Aug 1997 | British | 75 years |
| Kenneth George Stephenson Gillham | Director | 22 Sept 1993 | 30 Dec 1998 | South African | 81 years |
| Michael David Jordan | Director | 27 Jul 1992 | 22 Sept 1993 | British | 88 years |
| Peter William James Moffatt | Director | 27 Jul 1992 | 30 May 1993 | British | 84 years |
| Richard King | Director | 8 Dec 2008 | 24 Nov 2010 | South African | 70 years |
| Roger Alan Webber | Director | 27 Jul 1992 | 30 May 1993 | British | 91 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 8 Mar 2010 | British | 60 years |
| Sipho Solomon Mbelle | Director | 24 Nov 2010 | 31 Aug 2012 | South African | 65 years |
| Terence Michael Thornton | Director | 22 Dec 2014 | 1 Jul 2020 | British | 63 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |