| Adele Helen Anderson | Director | 22 Feb 2013 | 25 Oct 2019 | British | 61 years |
| Aidan Christopher Smith | Director | 14 Dec 1998 | 31 Mar 2008 | British | 67 years |
| Andrew David Strang | Director | 8 Jul 2009 | 30 Sept 2018 | British | 73 years |
| Andrew John Mack Huntley | Director | 8 Jul 2009 | 3 May 2017 | British | 87 years |
| Cheryl Joanne Millington | Director | 3 May 2019 | 26 Jun 2020 | British | 60 years |
| Conrad Barend Strauss | Director | 26 Mar 1999 | 14 Aug 2000 | South African | 90 years |
| David Andrew Fischel | Director | 14 Dec 1998 | 26 Apr 2019 | British | 68 years |
| David Bramson | Director | 1 Jan 2001 | 31 Mar 2006 | English | 84 years |
| David Hargrave | Director | 1 May 2020 | 2 Dec 2020 | British | 59 years |
| David Patrick Henry Burgess | Director | 1 Jan 2001 | 3 May 2017 | British | 82 years |
| Donald Gordon | Director | 26 Mar 1999 | 30 Jun 2005 | South African | 96 years |
| Douglas Ross Leslie | Director | 11 Dec 2000 | 31 Mar 2004 | British | 79 years |
| Edward Matthew Giles Roberts | Director | 3 Jun 2010 | 1 Jul 2020 | British | 63 years |
| Farrell Barry Sher | Director | 26 Mar 1999 | 26 Mar 2003 | British | 81 years |
| Francis Storer Eaton Newall | Director | 26 Mar 1999 | 27 Mar 2001 | British | 96 years |
| George Raymond Fine | Director | 7 May 2010 | 31 Dec 2018 | British | 80 years |
| George Raymond Fine | Director | 8 Jul 2009 | 7 May 2010 | British | 80 years |
| Graeme John Gordon | Director | 26 Mar 1999 | 7 May 2010 | British,south African | 63 years |
| Ian Charles Durant | Director | 21 Apr 2008 | 17 May 2010 | British | 68 years |
| Ian David Hawksworth | Director | 15 Sept 2006 | 7 May 2010 | British | 61 years |
| Ian James Henderson | Director | 7 Feb 2005 | 25 Apr 2012 | British | 83 years |
| James Harry Sutcliffe | Director | 26 Mar 1999 | 8 Nov 1999 | British | 70 years |
| Jeremy Stephen Bottle | Secretary | 14 Dec 1998 | 7 Jan 2000 | British | - |
| John George Abel | Director | 11 Dec 2000 | 31 Dec 2008 | British | 82 years |
| John George Abel | Director | 2 Jun 2010 | 8 May 2013 | British | 82 years |
| John Ian Saggers | Director | 13 Dec 1999 | 26 Oct 2006 | British | 80 years |
| John Strachan | Director | 7 Oct 2015 | 26 Jun 2020 | British | 75 years |
| John Whittaker | Director | 28 Jan 2011 | 26 Jun 2020 | British | 84 years |
| Kay Elizabeth Chaldecott | Director | 7 Feb 2005 | 30 Sept 2011 | British | 64 years |
| Lesley James | Director | 17 May 2004 | 18 Apr 2008 | British | 77 years |
| Louise Alexandra Virginia Charlotte Patten | Director | 22 Sept 2011 | 18 Feb 2019 | British | 72 years |
| Michael Ian Burke | Director | 1 Oct 2018 | 26 Jun 2020 | British | 70 years |
| Michael Rapp | Director | 26 Mar 1999 | 2 Jun 2010 | British | 91 years |
| Nilesh Sachdev | Director | 1 Nov 2006 | 4 May 2016 | British | 68 years |
| Peter Colin Badcock | Director | 11 Dec 2000 | 31 Mar 2004 | British | 82 years |
| Phillip Sober | Director | 26 Mar 1999 | 26 Mar 2002 | British | 95 years |
| Rakhi (parekh) Goss-custard | Director | 7 Oct 2015 | 3 May 2019 | American | 52 years |
| Richard Malcolm Cable | Director | 7 Feb 2005 | 18 Apr 2008 | British | 67 years |
| Richard Michael Gordon | Director | 9 Jan 2001 | 7 May 2010 | British | 68 years |
| Richard Michael Gordon | Director | 7 May 2010 | 18 Feb 2019 | British | 68 years |
| Robert Gerard Finch | Director | 7 Feb 2005 | 31 Jul 2008 | British | 82 years |
| Robert Oscar Rowley | Director | 17 May 2004 | 18 Oct 2013 | British | 77 years |
| Robin Alexander Macdonald Baillie | Director | 26 Mar 1999 | 31 Mar 2004 | British | 93 years |
| Robin Renwick Of Clifton | Director | 26 Mar 1999 | 6 Jul 2000 | British | 89 years |
| Robin William Turnbull Buchanan | Director | 26 Mar 1999 | 31 Dec 2008 | British | 74 years |
| Roy Cecil Andersen | Director | 26 Mar 1999 | 27 Jul 2000 | South African | 78 years |
| Stephen David Barber | Director | 9 Sept 2019 | 26 Jun 2020 | British | 74 years |
| Steven Keith Underwood | Director | 22 Feb 2011 | 26 Jun 2020 | British | 52 years |
| Susan Marsden | Secretary | 7 Feb 2000 | 31 Dec 2020 | British | - |