| Alain Gerard Edmond Bourguignon | Director | 1 Apr 2010 | 1 Mar 2011 | French | 67 years |
| Barnabus Towne Beddow | Director | 1 Nov 1999 | 30 Mar 2007 | British | 77 years |
| Barnabus Towne Beddow | Secretary | 1 Nov 1999 | 12 Feb 2007 | British | - |
| Brian James Patrick Moon | Director | 19 Apr 1991 | 23 May 1997 | British | 80 years |
| Charles Ernest Stewart Mcclure | Director | 19 Apr 1991 | 18 Jun 1997 | British | 85 years |
| David Peter Smith | Director | 18 Jun 1997 | 30 Jun 2005 | British | 73 years |
| George William Bolsover | Director | 29 Sept 2006 | 31 Mar 2010 | British | 76 years |
| James Keith Retallack | Director | 1 Mar 2011 | 30 Jun 2011 | British | 69 years |
| James West Atherton-ham | Director | 1 Jul 2011 | 30 Apr 2019 | British | 56 years |
| John Barry Sullivan | Director | 19 Apr 1991 | 21 May 1997 | Irish | 82 years |
| John Ferguson Bowater | Director | 12 Feb 2007 | 31 Dec 2022 | British | 77 years |
| John Foster Yeoman | Director | 18 Jun 1997 | 8 Sept 2006 | British | 65 years |
| John Gerard Wernicke Smart | Director | 18 Jun 1997 | 1 Nov 1999 | British | 81 years |
| John Gerard Wernicke Smart | Secretary | 18 Jun 1997 | 1 Nov 1999 | British | - |
| Mary Ford | Secretary | 12 Feb 2007 | 30 Mar 2012 | British | - |
| Raymond Arnold Reilly | Secretary | 19 Apr 1991 | 18 Jun 1997 | Irish | - |
| Richard James Drew | Director | 19 Apr 1991 | 23 May 1997 | British | 81 years |
| Roland Edward Hall | Director | 29 Jun 1995 | 26 May 1997 | British | 77 years |
| Ronald Mcintyre | Director | 19 Apr 1991 | 18 Jun 1997 | British | 85 years |
| Ross William Snape | Director | 12 Sept 2005 | 29 Sept 2006 | British | 62 years |