| Andrew Nicholas Russell | Director | 5 Mar 2010 | 30 Nov 2011 | British | 59 years |
| Brona Rose Mckeown | Secretary | 19 Dec 2014 | 30 Mar 2015 | - | - |
| Caroline Jane Richardson | Director | 23 Mar 2017 | 1 Oct 2018 | British | 52 years |
| Catherine Elizabeth Green | Secretary | 14 Feb 2019 | 1 Oct 2025 | - | - |
| Charles Francis Mckeown | Director | 15 Nov 2002 | 25 Apr 2007 | British | 77 years |
| Charles Thomas Hillcock | Director | 2 Feb 1994 | 30 Jul 1999 | British | 78 years |
| Clare Louise Gosling | Director | 30 Mar 2012 | 20 Aug 2015 | British | 53 years |
| Daniel Mundy | Director | 20 Aug 2015 | 10 Mar 2017 | British | 50 years |
| David Clive Whitehead | Secretary | 30 Mar 2015 | 14 Feb 2019 | - | - |
| David John Cox | Director | 1 Jun 1992 | 14 Nov 2003 | British | 78 years |
| Derek Gilbert Dawson | Director | 1 Jun 1992 | 8 Jan 1993 | British | 94 years |
| George Stephan Pater | Director | 20 Apr 2007 | 22 Aug 2008 | British | 75 years |
| Grahame George Scott Mcgirr | Director | 17 Apr 2014 | 6 Oct 2016 | Scottish | 49 years |
| Isabel Mary Chadwick | Director | 20 Aug 2015 | 28 Feb 2018 | British | 59 years |
| Jonathan Daniel Bailey | Director | 1 Oct 2018 | 11 Feb 2022 | British | 39 years |
| Katy Jane Arnold | Secretary | 1 Jun 2014 | 19 Dec 2014 | - | - |
| Louise Jeanette Britnell | Director | 30 Jun 2019 | 31 Mar 2025 | British | 47 years |
| Lynn Rose Coleman | Director | 9 Dec 2003 | 6 Mar 2009 | British | 72 years |
| Mark Stephen Russon | Director | 6 Oct 1998 | 23 Aug 2002 | British | 63 years |
| Michael Anthony Firth | Director | 6 Feb 1996 | 1 Oct 2002 | British | 80 years |
| Michael David Fairbairn | Director | 16 Apr 2007 | 26 Jun 2012 | British | 74 years |
| Michael John Woodward | Director | 5 Jan 1994 | 30 Mar 1994 | British | 79 years |
| Moira Ann Lees | Secretary | 1 Jun 1992 | 11 Nov 2003 | British | - |
| Moira Ann Lees | Secretary | 13 Jan 2006 | 19 Jul 2010 | British | - |
| Nicholas Gibson Websdell | Director | 20 Aug 2015 | 23 Mar 2017 | British | 51 years |
| Patricia Anne Wade | Secretary | 19 Jul 2010 | 16 Apr 2014 | - | - |
| Patricia Anne Wade | Secretary | 11 Nov 2003 | 13 Jan 2006 | British | - |
| Peter Alan Ferns | Director | 28 Jul 2009 | 11 Sept 2011 | British | 63 years |
| Richard John Adnett | Director | 23 Mar 2017 | 30 Jun 2019 | British | 52 years |
| Richard Thomas Goddard | Director | 14 Apr 1999 | 7 Oct 2003 | British | 69 years |
| Richard Thomas Goddard | Director | 4 Apr 2008 | 8 Oct 2009 | British | 69 years |
| Robert William Peter Morris | Director | 1 Jun 1992 | 5 Aug 1997 | British | 77 years |
| Robin John Russel Fisher | Director | 20 Jan 2004 | 15 Aug 2007 | British | 68 years |
| Rodney Jensen Bulmer | Director | 7 May 2008 | 16 Apr 2014 | British | 56 years |
| Roger John Bridport | Director | 1 Jun 1992 | 26 Sept 2003 | British | 83 years |
| Roger John Gorvin | Director | 1 Jun 1992 | 2 Nov 1993 | British | 88 years |
| Roger Lionel King | Director | 30 Mar 1994 | 17 Jun 1997 | British | 78 years |
| Stephen Allen Carter | Director | 17 Jun 1997 | 9 Feb 1999 | British | 85 years |
| Steven David Kember | Director | 5 Aug 1997 | 29 Oct 2004 | British | 61 years |
| Stuart James Ritchie | Director | 9 May 2001 | 7 Oct 2003 | British | 74 years |
| Terence James Thomas Of Macclesfield | Director | 1 Jun 1992 | 30 Mar 1994 | British | 89 years |
| William John Marper | Director | 30 Mar 1994 | 6 Feb 1996 | British | 80 years |