| David Edmund Frederick Simons | Director | 1 Jun 1992 | 2 Oct 2002 | British | 85 years |
| David John Rivers Sleath | Director | 3 Apr 2007 | 15 Dec 2023 | British | 64 years |
| Derek Robert Wilson | Director | 1 Jun 1992 | 4 Nov 2002 | British | 81 years |
| Elizabeth Ann Blease | Secretary | 13 Oct 2008 | 3 Nov 2021 | Other | - |
| Elizabeth Anne Horler | Director | 30 Jul 2008 | 31 Mar 2009 | British | 55 years |
| Gerald Nigel Mobbs | Director | 1 Jun 1992 | 21 Sept 1999 | British | 88 years |
| Henry Armstrong Allen Stokes | Director | 15 Dec 2023 | 13 Feb 2025 | British | 51 years |
| Hugh Linklater Thomson | Director | 1 Jun 1992 | 31 Aug 1998 | British | 80 years |
| Ian David Coull | Director | 22 Jun 2009 | 5 Apr 2011 | British | 75 years |
| John Anthony Nicholas Heawood | Director | 2 Sept 2002 | 4 Jul 2008 | British | 72 years |
| John Robert Probert | Director | 3 Nov 2003 | 8 Jul 2008 | British | 74 years |
| John Robert Probert | Secretary | 1 Jun 1992 | 28 Jul 2008 | British | - |
| Julia Foo | Secretary | 3 Nov 2021 | 23 May 2023 | - | - |
| Justin Richard Read | Director | 30 Sept 2011 | 23 Nov 2016 | British | 64 years |
| Richard David Kingston | Director | 2 Sept 2002 | 31 Dec 2006 | British | 77 years |
| Simon Andrew Carlyon | Director | 20 Apr 2009 | 30 Jun 2015 | Australian | 52 years |
| Siva Shankar | Director | 31 Dec 2006 | 1 Dec 2011 | British | 55 years |
| Soumen Das | Director | 5 May 2017 | 15 Dec 2023 | British | 49 years |
| Trevor Charles Mant | Director | 22 Jun 2009 | 17 Dec 2009 | British | 69 years |
| Valerie Ann Lynch | Secretary | 28 Jul 2008 | 13 Oct 2008 | British | - |
| Walter Emile Rosa Hens | Director | 3 Apr 2007 | 31 Dec 2008 | Belgian | 77 years |