| Alan Leonard Whitnall | Secretary | 19 Aug 2002 | 29 May 2009 | British | - |
| Andrew Morris | Director | 7 Mar 2003 | 30 Jul 2010 | British | 69 years |
| Arnold Mark Threapleton | Director | 20 May 2019 | 30 Jun 2020 | British | 72 years |
| Carla Lucy Stockton-jones | Director | 1 Jul 2020 | 6 Jun 2023 | British | 54 years |
| Christopher David Elliott | Director | 17 Feb 2012 | 2 Sept 2013 | British | 61 years |
| Claire Ansley | Director | 17 Feb 2012 | 15 Aug 2016 | British | 57 years |
| David Kirsopp | Director | 30 Sept 1999 | 7 Mar 2003 | British | 72 years |
| David Reay | Secretary | 1 Nov 1999 | 19 Aug 2002 | British | - |
| Dean Hobson | Director | 15 Aug 2016 | 15 Jun 2018 | British | 46 years |
| George Eric Hutchinson | Director | 12 Sept 1991 | 2 Feb 1995 | British | 83 years |
| Glenn Vernon Stocks | Director | 23 Sept 2010 | 11 Jul 2011 | British | 67 years |
| Graham Charles Eccles | Director | 7 Mar 2003 | 30 Sept 2005 | British | 80 years |
| Ian Ralph Dobbs | Director | 30 Sept 2005 | 28 Feb 2009 | British Australian | 72 years |
| James Norton Stewart | Director | 15 Aug 2016 | 22 Mar 2024 | British | 52 years |
| John Conroy | Director | 12 Sept 1991 | 7 Mar 2003 | British | 79 years |
| John Conroy | Secretary | 12 Sept 1991 | 1 Nov 1999 | British | - |
| Kate Wright | Director | 27 Aug 2013 | 15 Aug 2016 | British | 42 years |
| Margaret Patricia Veronica Kay | Director | 17 Feb 2012 | 2 Oct 2017 | British | 68 years |
| Mark Stuart Edwin Haberfield | Director | 24 Sept 2008 | 17 Feb 2012 | British | 63 years |
| Martin Andrew Griffiths | Director | 7 Mar 2003 | 8 Jan 2021 | British | 60 years |
| Michael John Vaux | Director | 20 Sept 2010 | 30 Jul 2024 | British | 55 years |
| Michael John Vaux | Secretary | 29 May 2009 | 30 Jul 2024 | British | - |
| Nicholas Leigh Guest | Director | 7 Mar 2003 | 12 Sept 2007 | British | 60 years |
| Nigel Wragg | Director | 1 Nov 2013 | 20 May 2019 | British | 59 years |
| Peter John Nash | Director | 12 Sept 1991 | 30 Sept 1999 | British | 80 years |
| Timothy Colin Shoveller | Director | 30 Jul 2010 | 17 Feb 2012 | British | 54 years |
| Timothy David Bilby | Director | 17 Feb 2012 | 22 Mar 2024 | British | 54 years |