| Alan Clifford Levings | Secretary | 27 Sept 1992 | 11 Aug 1995 | British | - |
| Andrew Neville Joy | Director | 27 Sept 1992 | 9 Aug 1996 | British | 69 years |
| Andrew William Marchant | Director | 27 Sept 1992 | 9 Aug 1996 | British | 71 years |
| Barry John Southcott | Director | 26 Oct 1993 | 12 Apr 1996 | British | 76 years |
| Brian Andrew Linden | Director | 27 Sept 1992 | 9 Aug 1996 | British | 70 years |
| Charles Dumaresq Nicholson | Director | 27 Sept 1992 | 9 Aug 1996 | British | 74 years |
| Christopher John Robert Ashton | Secretary | 16 Jan 2002 | 7 Mar 2003 | British | - |
| Claire Alexandra Symonds | Director | 3 Oct 2007 | 30 May 2008 | British | 58 years |
| Daniel John Whincup | Director | 1 Jan 2017 | 21 Sept 2022 | British | 47 years |
| David George Morgan | Director | 5 Sept 2000 | 27 Jul 2007 | British | 80 years |
| David Nigel Beevor | Director | 25 May 1993 | 20 Dec 1996 | British | 85 years |
| Frederick Malcolm Irvine | Director | 5 Sept 2000 | 12 Dec 2001 | British | 80 years |
| Frederick Malcolm Irvine | Secretary | 5 Sept 2000 | 16 Jan 2002 | British | - |
| Geoffrey Mellor | Director | 27 Jul 2007 | 21 Sept 2022 | British | 62 years |
| George Alexander Bruce | Director | 9 Aug 1996 | 31 Dec 2009 | British | 68 years |
| Gerard Christopher Lane | Director | 1 Jul 2011 | 31 Dec 2016 | British | 65 years |
| Graham James Keniston-cooper | Director | 27 Sept 1992 | 9 Aug 1996 | British | 68 years |
| Guy Bryce Davison | Director | 27 Sept 1992 | 9 Aug 1996 | British | 69 years |
| Guy Patrick De Courcy Bennett | Director | 8 Aug 1996 | 11 Apr 1997 | British | 68 years |
| Hugh Macgillivray Langmuir | Director | 27 Sept 1992 | 9 Aug 1996 | British | 71 years |
| Jennifer Olwen Youde | Director | 8 Aug 1996 | 12 Dec 2001 | British | 71 years |
| John Forster Brown | Director | 27 Sept 1992 | 9 Aug 1996 | British | 74 years |
| Jonathan George Gough Clarke | Director | 27 Sept 1992 | 9 Aug 1996 | British | 68 years |
| Jonathan Michael Storer | Secretary | 1 Jul 2011 | 24 Dec 2013 | - | - |
| Joseph Barnes | Director | 3 Aug 1998 | 31 Aug 2001 | British | 72 years |
| Keith Alexander Wylie | Director | 27 Sept 1992 | 3 May 1993 | British | 76 years |
| Kevin John Whale | Secretary | 29 Feb 1996 | 10 Aug 1996 | British | - |
| Mark Geoffrey William Burgess | Director | 27 Sept 1992 | 29 Feb 1996 | British | 67 years |
| Mark Geoffrey William Burgess | Secretary | 11 Aug 1995 | 29 Feb 1996 | British | - |
| Michael John Hensman | Director | 3 Sept 2001 | 30 Apr 2011 | British | 76 years |
| Michael John Hensman | Secretary | 7 Mar 2003 | 30 Apr 2011 | British | - |
| Michael Pratten | Director | 16 Sept 2008 | 31 May 2012 | British | 61 years |
| Nigel Brentwood Wheeler | Director | 27 Sept 1992 | 9 Aug 1996 | British | 75 years |
| Paul Michael Whitney | Director | 27 Sept 1992 | 26 Oct 1993 | British | 78 years |
| Peter Malcolm Harris | Director | 8 Aug 1996 | 5 Sept 2000 | British | 71 years |
| Peter Malcolm Harris | Secretary | 10 Aug 1996 | 5 Sept 2000 | British | - |
| Philip John Maskell | Director | 27 Sept 1992 | 14 Jul 1995 | British | 67 years |
| Riccardo Di Mascio | Director | 8 Aug 1996 | 3 Nov 1997 | British | 69 years |
| Richard James Munton | Director | 27 Sept 1992 | 9 Aug 1996 | British | 70 years |
| Robin Alexander Hall | Director | 27 Sept 1992 | 9 Aug 1996 | British | 78 years |
| Simon Nicholas Rowlands | Director | 27 Sept 1992 | 9 Aug 1996 | British | 69 years |
| Stefan Dunatov | Director | 16 Apr 2012 | 11 Apr 2017 | New Zealand | 53 years |
| William Robert John Dinning | Director | 18 Jun 2014 | 31 Jul 2016 | British | 67 years |