| Alan Ewing Mills | Secretary | 20 Apr 1993 | 29 Jul 1994 | British | - |
| Alan Peter Dickinson | Director | 5 Jun 1995 | 1 May 1998 | British | 76 years |
| Alan Wallace Mckean | Director | 20 Apr 1993 | 3 Nov 1994 | British | 72 years |
| Andrew James Morris | Director | 20 Jul 2006 | 20 Oct 2008 | British | 54 years |
| Angus James Murray Mair | Director | 1 May 1998 | 7 May 1999 | British | 82 years |
| Carolyn Smith | Secretary | 13 Dec 2000 | 30 Mar 2001 | British | - |
| Cecilia Ann Mcnulty | Director | 13 Mar 1995 | 21 Aug 1997 | British | 63 years |
| Christopher John Parsons | Director | 31 Jul 2017 | 11 Jan 2020 | British | 62 years |
| Declan Joseph Hourican | Director | 26 Jan 2009 | 23 Dec 2011 | Irish | 50 years |
| Declan Joseph Hourican | Director | 5 Sept 2014 | 7 Sept 2016 | Irish | 50 years |
| Derek Stephen Sach | Director | 3 Nov 1994 | 13 Mar 1997 | British | 78 years |
| Derek Stephen Sach | Director | 11 Dec 1998 | 23 Dec 2011 | British | 78 years |
| Eric George William Tough | Director | 20 Apr 1993 | 3 Nov 1994 | British | 69 years |
| Fiona Jane Macgregor | Director | 20 Jul 2006 | 29 Feb 2012 | British | 60 years |
| Grahame Taylor Whitehead | Director | 3 Nov 1994 | 28 Feb 2003 | British | 76 years |
| Hew Campbell | Director | 5 Sept 1994 | 3 Nov 1994 | British | 64 years |
| John Donald Black Workman | Director | 19 Mar 2001 | 15 Nov 2001 | British | 74 years |
| John Michael Davison | Director | 28 Feb 2011 | 30 Jun 2015 | British | 60 years |
| John Philip Petrie | Director | 3 Nov 1994 | 13 Mar 1995 | British | 74 years |
| Jonathan Mark Penfold | Director | 30 Sept 1997 | 21 Feb 2007 | British | 64 years |
| Jose Guillermo Brena | Director | 26 Feb 2003 | 12 Dec 2003 | British | 67 years |
| Kavita Gopinathan | Director | 31 Jul 2012 | 5 Sept 2014 | Malaysian | 47 years |
| Kavita Gopinathan | Director | 11 Jan 2020 | 22 Oct 2021 | Malaysian | 47 years |
| Kennedy Campbell Foster | Director | 20 Apr 1993 | 5 Sept 1994 | British | 76 years |
| Laura Jane Barlow | Director | 27 Apr 2010 | 31 Jul 2017 | British | 59 years |
| Maria Marchant | Secretary | 3 Dec 2001 | 24 Feb 2003 | British | - |
| Mark Andrew Lambert | Director | 19 Mar 2001 | 10 Mar 2006 | British | 60 years |
| Mark Craig | Secretary | 24 Feb 2003 | 14 Aug 2008 | British | - |
| Nadim-ul Hassan Sheikh | Director | 9 Jan 2012 | 31 Jul 2012 | British | 56 years |
| Nathan Mark Bostock | Director | 8 Feb 2010 | 23 Dec 2011 | British | 66 years |
| Niamh Simms | Director | 22 Oct 2021 | 23 Jul 2024 | Irish | 60 years |
| Philip Andrew Carraro | Director | 9 Jun 1999 | 20 Apr 2009 | United States Citizen | 82 years |
| Rachel Elizabeth Fletcher | Secretary | 15 Aug 2008 | 27 Apr 2012 | British | - |
| Robert Henry Beattie | Director | 3 Nov 1994 | 5 Nov 2003 | British | 77 years |
| Robert Speirs | Director | 13 Mar 1997 | 23 Oct 1998 | British | 90 years |
| Rory Malcolm Cullinan | Director | 5 Nov 2003 | 21 Jul 2004 | British | 67 years |
| Rory Malcolm Cullinan | Director | 8 Feb 2010 | 13 Dec 2011 | British | 67 years |
| Sanjay Bhupendra Patel | Director | 5 Oct 2015 | 31 Jul 2017 | British | 55 years |
| Shirley Margaret Macgillivray | Secretary | 29 Jul 1994 | 3 Nov 1994 | British | - |
| Shirley Margaret Macgillivray | Secretary | 13 Mar 1998 | 3 Dec 2001 | British | - |
| Simon Jonathan Chrispin | Director | 11 Dec 1998 | 10 Apr 2001 | British | 64 years |
| Thomas Peter Kennedy | Director | 1 May 1998 | 8 Feb 2010 | British | 68 years |