| Adam Charles Little | Director | 1 Nov 2004 | 1 Jun 2007 | British | 75 years |
| Alan Malcolm Chater | Director | 24 Jul 1992 | 10 Mar 1993 | British | 75 years |
| Alan Paul Busson | Director | 28 Nov 1995 | 1 Dec 2001 | British | 66 years |
| Alan Paul Busson | Secretary | 22 Aug 2000 | 12 Apr 2001 | British | - |
| Alan Philip Martin | Director | 22 Dec 2010 | 1 Jul 2022 | British | 55 years |
| Alison Sheila Young | Director | 2 Nov 2017 | 1 Aug 2024 | British | 61 years |
| Amanda Jane Sin-fai-lam | Secretary | 26 Nov 1999 | 22 Aug 2000 | British | - |
| Brian Hardy | Director | 24 Jul 1992 | 28 Nov 1995 | British | 84 years |
| Christina Campbell Verchere | Director | 10 May 2014 | 1 Mar 2018 | American | 55 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| David Sellors | Director | 1 Aug 1994 | 28 Nov 1995 | British | 71 years |
| Douglas Patrick Chapman | Director | 1 Dec 2001 | 1 Feb 2003 | British | 76 years |
| Edward Geoffrey Parker | Director | 12 Feb 1999 | 26 Nov 1999 | British | 59 years |
| Edward Geoffrey Parker | Secretary | 17 Dec 1993 | 26 Nov 1999 | British | - |
| Emma Louise Delaney-mc Knight | Director | 27 Feb 2015 | 1 May 2017 | Irish | 53 years |
| Francis William Michael Starkie | Director | 1 Dec 2001 | 1 Nov 2004 | British | 77 years |
| Francis William Michael Starkie | Director | 1 Dec 2006 | 30 Sept 2009 | British | 77 years |
| James Grant Nemeth | Director | 1 Feb 2003 | 3 Aug 2005 | Us Citizen | 69 years |
| James Stephen Blythe | Director | 22 Dec 2010 | 1 Dec 2014 | British | 71 years |
| John Harold Bartlett | Director | 7 Dec 2010 | 1 Jan 2016 | British | 73 years |
| John Murphy Brame | Director | 11 Jun 2014 | 30 Apr 2018 | American | 65 years |
| Jonathan Michael Fry | Director | 24 Jul 1992 | 1 Aug 1993 | British | 89 years |
| Martin Robert Illingworth | Director | 7 Dec 2010 | 31 Jan 2014 | British | 69 years |
| Martin William Perrie | Director | 22 Mar 2021 | 30 Sept 2024 | British | 52 years |
| Nader Zaki | Director | 1 Mar 2018 | 1 Jul 2022 | Egyptian | 53 years |
| Patrick Herbert Foster | Director | 30 Sept 2000 | 1 Dec 2001 | British | 79 years |
| Paul David Dean | Director | 10 Mar 1993 | 1 Aug 1994 | British | 65 years |
| Peter Muir Elliott | Director | 26 Nov 1999 | 30 Sept 2000 | British | 76 years |
| Philip Robert Sutherland Howie | Director | 28 Nov 1995 | 12 Feb 1999 | British | 71 years |
| Philip Robert Sutherland Howie | Secretary | 24 Jul 1992 | 17 Dec 1993 | British | - |
| Rebecca Jayne Wright | Secretary | 12 Apr 2001 | 30 Jun 2010 | Other | - |
| Robert Carl Fearnley | Director | 1 Jun 2007 | 7 Dec 2010 | British | 63 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 7 Dec 2010 | British | 60 years |
| Sandra Jean Macrae | Director | 1 Jan 2016 | 28 Aug 2020 | British | 63 years |
| Stuart Charles Shaw | Director | 30 Sept 2024 | 27 Nov 2024 | British | 51 years |
| Svetlana Pereverzeva | Director | 30 Apr 2018 | 22 Mar 2021 | British | 54 years |
| Timothy Edwin Paul Stevenson | Director | 1 Aug 1993 | 24 Jul 1993 | British | 78 years |
| Timothy Edwin Paul Stevenson | Director | 1 Aug 1993 | 28 Nov 1995 | British | 78 years |
| William Wei Lee Lin | Director | 22 Dec 2010 | 10 May 2014 | American | 59 years |
| Xinchao Wu | Director | 1 Jul 2022 | 22 Nov 2024 | American | 60 years |
| Yasin Stanley Ali | Secretary | 12 Apr 2001 | 30 Jun 2010 | - | - |