| Andrew Edward Guy Gulliford | Director | 1 Mar 2006 | 25 Jul 2016 | British | 80 years |
| Antony Romer Beevor | Director | 9 May 2000 | 24 Jul 2012 | British | 86 years |
| Christopher Giles Herron Weaver | Director | 13 Sept 1993 | 24 Jul 2012 | British | 80 years |
| Duncan Charles Eades Walker | Director | 24 Jun 2011 | 12 Jul 2017 | British | 47 years |
| Gerald Anthony Kaye | Director | 28 Sept 1994 | 17 Jul 2024 | British | 68 years |
| Heather Jane Williams | Secretary | 12 Sept 2013 | 30 Apr 2015 | - | - |
| Ian Geoffrey Butler | Director | 21 Apr 1993 | 20 Mar 2001 | British | 101 years |
| Jack Struan Pitman | Director | 1 Aug 2007 | 13 Feb 2015 | British | 57 years |
| James Richard Moss | Secretary | 21 May 2015 | 1 Apr 2025 | - | - |
| John Philip Southwell | Director | 22 Jun 1992 | 20 Jul 2006 | British | 93 years |
| Joseph Julian Lister | Director | 1 Sept 2018 | 17 Jul 2024 | British | 55 years |
| Laurence Charles Kevin Kelly | Director | 22 Jun 1992 | 15 Jun 1993 | British | 93 years |
| Michael Eric Slade | Director | 22 Jun 1992 | 11 Jul 2019 | British | 80 years |
| Michael Kane O'donnell | Director | 24 Jun 2011 | 11 Jul 2019 | Irish | 59 years |
| Nigel Guthrie Mcnair Scott | Director | 22 Jun 1992 | 25 Jul 2016 | British | 81 years |
| Nigel Guthrie Mcnair Scott | Secretary | 22 Jun 1992 | 10 Mar 1994 | British | - |
| Philip Michael Brown | Director | 8 Apr 1998 | 4 Jun 2009 | British | 66 years |
| Richard Dunnell Gillingwater | Director | 24 Jul 2012 | 12 Jul 2018 | British | 70 years |
| Richard John Grant | Director | 24 Jul 2012 | 14 Jul 2022 | British | 72 years |
| Susan Vivien Clayton | Director | 1 Feb 2016 | 17 Jul 2025 | British | 69 years |
| Timothy John Murphy | Director | 24 Jul 2012 | 17 Jul 2025 | British | 67 years |
| Timothy John Murphy | Secretary | 10 Mar 1994 | 12 Sept 2013 | British | - |
| Wilfred John Thomas Weeks | Director | 14 Apr 2005 | 24 Jul 2012 | British | 78 years |