| Alan Geoffrey Sawyer | Director | 31 May 1991 | 31 Dec 1991 | British | 71 years |
| Anthony Guthrie | Secretary | 12 Apr 2016 | 3 May 2018 | - | - |
| David Evison | Director | 4 May 2005 | 26 Nov 2010 | British | 62 years |
| David Harry Graham | Director | 6 Dec 1994 | 4 May 2005 | British | 75 years |
| David Harry Graham | Secretary | 20 Mar 1995 | 17 Feb 2004 | British | - |
| Dean Coates | Director | 25 Jan 1994 | 1 Dec 2000 | British | 61 years |
| Duncan John Cooper | Director | 8 Mar 2018 | 2 May 2019 | British | 47 years |
| Duncan Seath Millar | Director | 2 Jun 1997 | 4 May 2001 | British | 63 years |
| Edward Peter Barker | Director | 18 Apr 2012 | 8 Mar 2018 | British | 54 years |
| Hazel Debra Jarvis | Secretary | 25 Feb 2014 | 12 Apr 2016 | British | - |
| Hazel Debra Jarvis | Secretary | 17 Feb 2004 | 27 Jun 2012 | British | - |
| James John Mccarthy | Director | 15 Oct 2004 | 1 Jun 2006 | British | 70 years |
| John Alexander Knowles | Director | 16 Jun 1997 | 17 Nov 2000 | British | 74 years |
| John Angus Mclaren Oughtred | Director | 4 May 2005 | 14 Mar 2008 | British | 70 years |
| Jonathan Robert Lawson | Director | 1 Jun 2006 | 8 Dec 2006 | British | 55 years |
| Julia Foo | Secretary | 14 Jun 2019 | 7 May 2021 | - | - |
| Lawrence Richard Christensen | Director | 8 Dec 2006 | 14 Mar 2008 | British | 83 years |
| Leslie Bell | Director | 31 May 1991 | 17 Feb 2004 | British | 93 years |
| Marcus Leek | Director | 19 Dec 2002 | 4 May 2005 | British | 51 years |
| Martyn Stephen Burke | Director | 14 Jun 2019 | 3 Dec 2019 | British | 56 years |
| Michael Trevor Walker | Director | 25 Jan 1994 | 30 Jun 2001 | British | 60 years |
| Michael Trevor Walker | Director | 2 Oct 2001 | 25 Oct 2007 | British | 60 years |
| Nicholas David Jones | Director | 17 Feb 2004 | 10 Sept 2004 | British | 60 years |
| Nicholas Paul Michael Angelo Mills Hicks | Director | 17 Feb 2004 | 15 Oct 2004 | British | 55 years |
| Nicholas Roger Hateley | Director | 4 May 2005 | 26 Oct 2006 | British | 61 years |
| Philip Davis | Director | 4 May 2005 | 25 Oct 2007 | British | 69 years |
| Philip Gallier | Director | 3 Dec 2019 | 9 Sept 2022 | British | 45 years |
| Philip William Davies | Secretary | 27 Jun 2012 | 25 Feb 2014 | British | - |
| Richard Alexander Fleming | Director | 16 Sept 2010 | 18 Apr 2012 | British | 55 years |
| Richard Collins | Director | 13 Nov 2000 | 19 Dec 2002 | British | 68 years |
| Richard Collins | Secretary | 31 May 1991 | 20 Mar 1995 | British | - |
| Richard John Keenlyside | Director | 19 Dec 2002 | 4 May 2005 | British | 53 years |
| Sheila Irene Gibbin | Director | 6 Apr 1998 | 30 Jun 2001 | British | 79 years |
| Simon Jonathan Henry Still | Director | 10 Sept 1996 | 31 Jan 2003 | British | 77 years |
| Steven Andrew Bell | Director | 31 May 1991 | 29 Apr 2005 | British | 66 years |
| Steven Fraser Brown | Director | 16 Jun 1997 | 30 Jun 2001 | British | 61 years |
| Timothy Fallowfield | Secretary | 3 May 2018 | 14 Jun 2019 | - | - |