| Andrew James William Telfer | Director | 1 Jan 2009 | 1 Jan 2017 | British | 59 years |
| Andrew Richard Hill | Director | 1 Nov 1994 | 12 Apr 1999 | British | 68 years |
| Christopher Julian Sheridan | Director | 1 Apr 1999 | 31 Dec 2002 | British | 83 years |
| Christopher Julian Sheridan | Director | 1 Jan 2003 | 31 Jan 2003 | British | 83 years |
| Christopher Julian Sheridan | Director | 1 Jan 2009 | 26 May 2023 | British | 83 years |
| Christopher Simon Durkin | Director | 1 Jan 2010 | 1 Jan 2017 | British | 63 years |
| Colin Enticknap | Director | 23 Oct 1992 | 23 May 2008 | British | 68 years |
| Colin Enticknap | Director | 1 Jan 2009 | 1 Jan 2024 | British | 68 years |
| Duncan Inglis Canney | Director | 23 May 2008 | 1 Apr 2009 | British | 74 years |
| Ian Leonard Dixon | Director | 23 Oct 1992 | 31 Dec 1998 | British | 88 years |
| Ian Roger Woolfe | Secretary | 1 Jun 1999 | 13 Sept 1999 | British | - |
| John Frankiewicz | Director | 1 Jan 2007 | 1 Apr 2009 | British | 71 years |
| John Frankiewicz | Director | 1 Jan 2010 | 31 Dec 2014 | British | 71 years |
| John Frederick Waterman | Director | 1 Jan 2019 | 18 Jul 2025 | British | 62 years |
| John William Bayliss | Director | 23 Oct 1992 | 1 Jun 1999 | British | 92 years |
| John William Bayliss | Secretary | 23 Oct 1992 | 1 Jun 1999 | British | - |
| Jonathon Espie Porritt | Director | 1 Jan 2009 | 1 Apr 2009 | British | 76 years |
| Jonathon Espie Porritt | Director | 1 Jan 2010 | 1 Jan 2023 | British | 76 years |
| Kieran Thomas Larkin | Director | 23 Oct 1992 | 12 Apr 1999 | British | 73 years |
| Laurence Nigel Holdcroft | Secretary | 1 Mar 2012 | 14 Mar 2016 | British | - |
| Michael Anthony Latham | Director | 1 Oct 1996 | 1 Apr 2009 | British | 84 years |
| Michael Leonard Hart | Director | 1 Jan 2019 | 18 Dec 2020 | British | 71 years |
| Paul Raymond Smith | Director | 1 Jan 2014 | 31 Dec 2016 | British | 67 years |
| Peter William Willmott | Director | 23 Oct 1992 | 30 Apr 1994 | British | 95 years |
| Philip Michael Wainwright | Director | 1 Jan 2016 | 26 Sept 2018 | British | 61 years |
| Robert Charles Eyre | Secretary | 23 May 2008 | 20 Aug 2013 | British | - |
| Steven Ian Graham Dixon | Director | 1 Jan 1998 | 23 May 2008 | British | 63 years |