| Aileen Norma Taylor | Secretary | 27 Apr 2018 | 5 Aug 2019 | - | - |
| Alexa Hamilton Henderson | Director | 24 Aug 2012 | 19 Jan 2018 | British | 64 years |
| Alexander Stewart Dudgeon | Director | 1 Jan 1989 | 25 Jan 1994 | British | 68 years |
| Alison Davis | Director | 27 Apr 2018 | 31 Mar 2020 | American | 64 years |
| Alison Marie Rose-slade | Director | 3 Dec 2018 | 25 Jul 2023 | British | 56 years |
| Andrew Kyle Mulligan | Director | 6 Apr 2006 | 16 Nov 2009 | British | 61 years |
| Brendan Robert Nelson | Director | 27 Apr 2018 | 31 Dec 2018 | British | 76 years |
| Brian Martin Mulholland | Director | 17 Mar 2015 | 22 Aug 2016 | British | 51 years |
| Brian Mccrindle | Director | 9 Oct 2012 | 30 Dec 2016 | British | 58 years |
| Byron Kenneth Coombs | Director | 28 Sept 2009 | 31 Dec 2011 | British | 65 years |
| Charles Annand Fraser | Director | 19 Feb 1990 | 1 Oct 1998 | British | 97 years |
| Christopher George Pearson | Director | 18 Oct 1993 | 30 Aug 1996 | British | 79 years |
| David James Cathie | Director | 2 Feb 2004 | 3 Sept 2010 | British | 69 years |
| David Lauder Bell | Director | 1 Dec 1995 | 4 Sept 1998 | British | 76 years |
| Didier Primat | Director | 9 Oct 1989 | 10 May 2001 | French | 81 years |
| Donald Graham | Director | 18 Mar 1991 | 16 Nov 2009 | British | 69 years |
| Douglas Robertson Corner | Director | 22 Sept 1997 | 30 Nov 2004 | British | 81 years |
| Edward Adam Michael Lee | Director | 7 Nov 1988 | 16 Apr 1990 | British | 83 years |
| Ewen James Stevenson | Director | 27 Apr 2018 | 30 Sept 2018 | British | 59 years |
| Fiona Mary Mackay | Secretary | 15 Jun 2017 | 27 Apr 2018 | - | - |
| Francesca Barnes | Director | 11 Jul 2017 | 27 Apr 2018 | British | 67 years |
| Frederickrichard Penn Howe | Director | 7 Nov 1988 | 16 Apr 1990 | British | 74 years |
| Gavin Christopher Frost | Director | 11 Feb 2011 | 20 Dec 2013 | British | 52 years |
| Graeme Thomas Hartop | Secretary | 22 Jan 1990 | 9 Oct 1989 | British | - |
| Graeme Thomas Hartop | Secretary | 22 Oct 1990 | 8 Nov 1994 | British | - |
| Graham John Beale | Director | 1 May 2018 | 31 Aug 2023 | British | 67 years |
| Graham Storrie | Director | 7 Feb 2011 | 27 Apr 2018 | British | 65 years |
| Ian Donald Cormack | Director | 1 May 2018 | 4 May 2025 | British | 78 years |
| Ian Martin Dalziel | Director | 7 Nov 1988 | 30 Jun 1992 | British | 78 years |
| Ian Maxwell Ewart | Director | 2 May 2012 | 1 Sept 2015 | Swiss | 64 years |
| James Hedley Rawlingson | Director | 28 Sept 2009 | 21 Mar 2011 | British | 58 years |
| James Tait Laurenson | Director | 9 Oct 1989 | 6 Sept 1993 | British | 84 years |
| Jan Cargill | Secretary | 5 Aug 2019 | 14 Feb 2025 | - | - |
| Jeremy Malbon Lowry | Director | 1 Jul 1989 | 30 Sept 1993 | British | 68 years |
| Jeremy Malbon Lowry | Secretary | 7 Nov 1988 | 22 Jan 1990 | British | - |
| Jeremy Paul Norfolk | Director | 7 Nov 1988 | 12 Mar 1991 | British | 77 years |
| John O'donnell | Director | 1 Dec 2004 | 16 Nov 2009 | British | 71 years |
| John Richard Hackett | Director | 25 Sept 2006 | 27 Nov 2009 | British | 65 years |
| Kerry Ann Falconer | Director | 1 Apr 2008 | 16 Nov 2009 | British | 65 years |
| Kerry Ann Falconer | Director | 15 Nov 2010 | 30 Nov 2015 | British | 65 years |
| Linda Hamilton Urquhart | Director | 24 Aug 2012 | 27 Apr 2018 | British | 66 years |
| Mark Donald Seligman | Director | 27 Apr 2018 | 31 Mar 2025 | British | 69 years |
| Mark Joseph Lund | Director | 11 Jul 2017 | 27 Apr 2018 | British | 68 years |
| Mary-lou Doherty | Secretary | 3 Dec 2002 | 31 Aug 2006 | British | - |
| Michael John Morley | Director | 24 Aug 2009 | 17 Mar 2016 | British | 68 years |
| Michael John Rogers | Director | 27 Apr 2018 | 25 Apr 2023 | British | 61 years |
| Michael Robert Regan | Director | 31 Oct 2016 | 27 Apr 2018 | British | 46 years |
| Miller Roy Mclean | Director | 28 Sept 2009 | 11 Jul 2017 | British | 76 years |
| Morten Nicolai Friis | Director | 27 Apr 2018 | 31 Jul 2023 | Norwegian | 72 years |
| Morven Gow | Secretary | 19 Jun 2013 | 24 Jul 2017 | - | - |
| Penelope Lesley Hughes | Director | 27 Apr 2018 | 30 May 2018 | British | 66 years |
| Peter Gordon Flavel | Director | 17 Mar 2016 | 27 Apr 2018 | Australian | 65 years |
| Peter Sanderson | Director | 25 May 1999 | 28 Apr 2000 | British | 85 years |
| Philip Taylor Morris | Director | 17 Jan 1994 | 12 Apr 2006 | British | 73 years |
| Raymond Marvin Entwistle | Director | 9 Oct 1989 | 31 Dec 2009 | British | 81 years |
| Richard Edwards Donaldson | Director | 1 Feb 1991 | 16 Nov 2009 | British | 79 years |
| Richard Robert Lockhart | Director | 20 May 2003 | 16 Nov 2009 | British | 59 years |
| Richard Walter Moore | Director | 20 May 2003 | 23 Jun 2008 | British | 73 years |
| Robert Andrew Joseph Gillespie | Director | 27 Apr 2018 | 15 Dec 2022 | British | 70 years |
| Robert Currie Cumming | Director | 25 Nov 1992 | 6 Sept 1993 | British | 104 years |
| Ronald Stuart Alexander | Secretary | 1 Sept 2006 | 7 Jan 2009 | British | - |
| Ross Maxwell Mcewan | Director | 27 Apr 2018 | 31 Oct 2019 | New Zealander | 68 years |
| Sally Anne Doyle | Secretary | 7 Jan 2009 | 19 Jun 2013 | British | - |
| Scott Edward Massie | Secretary | 8 Nov 1994 | 16 Jan 1995 | British | - |
| Sheila Valerie Noakes | Director | 27 Apr 2018 | 31 Jul 2020 | British | 76 years |
| Simon Edward Callum Miller | Director | 23 Nov 1992 | 28 Feb 2010 | British | 73 years |
| Sir Howard John Davies | Director | 27 Apr 2018 | 15 Apr 2024 | British | 74 years |
| William Arthur Waldegrave | Director | 11 Jul 2017 | 27 Apr 2018 | British | 79 years |
| William John Stanworth | Director | 1 Mar 1998 | 16 Nov 2009 | British | 65 years |
| William John Stanworth | Secretary | 16 Jan 1995 | 3 Dec 2002 | British | - |
| William Michael Clifford Kennedy | Director | 22 Jul 1996 | 31 Dec 2004 | British | 90 years |