| Aderemi Ladega | Secretary | 11 Apr 2005 | 30 Jun 2010 | British | - |
| Alan Henry Haywood | Director | 1 Nov 2014 | 1 Jan 2017 | British | 60 years |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 11 Apr 2005 | Other | - |
| Anthony Bryan Hayward | Director | 1 Sept 2000 | 1 Nov 2002 | British | 69 years |
| Brian Peevor | Secretary | 1 Apr 1994 | 31 Aug 1997 | British | - |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| Clive Warren Chambers | Director | 18 Aug 1993 | 30 Apr 1998 | British | 86 years |
| David Alan Rider | Director | 6 Oct 2014 | 30 Nov 2020 | British | 62 years |
| David James Bucknall | Director | 1 Jan 2012 | 1 Nov 2014 | British | 58 years |
| David Robert Watson | Director | 1 Oct 1996 | 1 Sept 2000 | British | 74 years |
| Debasish Satya Sanyal | Director | 1 Aug 2007 | 1 Jan 2012 | British | 61 years |
| Douglas Patrick Chapman | Director | 17 Jul 1992 | 31 Mar 1994 | British | 76 years |
| Douglas Patrick Chapman | Director | 1 Mar 1995 | 1 Feb 2003 | British | 76 years |
| Douglas Patrick Chapman | Director | 1 Jun 2005 | 31 Jul 2007 | British | 76 years |
| Francis William Michael Starkie | Director | 1 Apr 1994 | 30 Sept 2009 | British | 77 years |
| Gary Christian Greve | Director | 1 Mar 1995 | 31 Aug 1995 | Us Citizen | 77 years |
| Ian Guy Stewart Hartigan | Director | 10 Apr 1992 | 18 Aug 1993 | British | 93 years |
| James Grant Nemeth | Director | 1 Feb 2003 | 1 Jun 2005 | Us Citizen | 69 years |
| John Gordon Sinclair Buchanan | Director | 1 Sept 1995 | 30 Sept 1996 | British | 83 years |
| Julian John Watts | Director | 21 Dec 1994 | 23 May 1997 | New Zealand | 87 years |
| Julian John Watts | Secretary | 10 Apr 1992 | 31 Mar 1994 | New Zealand | - |
| Katherine Anne Thomson | Director | 1 Jan 2017 | 1 Feb 2022 | British | 58 years |
| Mark Traill Bentley | Director | 10 Apr 1992 | 17 Jul 1992 | British | 91 years |
| Martin Francis Giles | Director | 29 Jul 2016 | 28 Feb 2019 | British | 65 years |
| Niamh Marie Staunton | Director | 1 Feb 2022 | 15 Jan 2024 | Irish | 48 years |
| Nicholas Mark Hargrave Bamfield | Director | 1 Jun 2005 | 29 Jul 2016 | British | 67 years |
| Richard Charles Grayson | Director | 10 Apr 1992 | 21 Dec 1994 | British | 85 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 6 Oct 2014 | British | 60 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |