| Albert Clive Taylor-clague | Director | 24 Jan 1992 | 31 Dec 1993 | British | 97 years |
| Alfred Merton Vinton | Director | 1 May 1995 | 23 Sept 2009 | American | 88 years |
| Andrew Richard Grimditch | Director | 2 Mar 2018 | 26 Feb 2019 | British | 56 years |
| David Francis Osbourne | Director | 24 Jan 1992 | 31 Dec 1996 | British | 89 years |
| Declan Doyle | Director | 31 Mar 2014 | 31 May 2017 | British | 56 years |
| Edward John Michael Bramson | Director | 1 Jun 2017 | 2 Mar 2018 | British | 75 years |
| Gerard Absalom | Secretary | 30 Sept 1996 | 8 Jan 1998 | British | - |
| Hugh Anthony Lewis Holland Mumford | Director | 24 Jan 1992 | 31 May 2017 | British | 81 years |
| James Richard Brown | Director | 24 Jan 1992 | 30 Apr 1992 | British | 86 years |
| Julian David Knott | Director | 4 Aug 1996 | 8 Jul 2005 | British | 76 years |
| Kalvin Bret Booth | Director | 4 Aug 1996 | 8 Mar 2002 | Australian | 63 years |
| Michael Craig Stoddart | Director | 24 Jan 1992 | 1 May 1995 | British | 94 years |
| Philip John Dyke | Director | 4 Aug 1996 | 31 Mar 2014 | British | 80 years |
| Philip John Dyke | Secretary | 24 Jan 1992 | 31 Mar 2014 | British | - |
| Robert Glyn Morris | Director | 24 Jan 1992 | 31 Dec 1992 | British | 79 years |
| Robert John Lewis | Director | 10 Jun 1992 | 31 Mar 2012 | British | 82 years |
| Stephen Daryl Ozin | Director | 4 Aug 1996 | 31 May 2017 | British | 64 years |