| Adam George Waddington | Director | 14 Aug 2011 | 1 Oct 2012 | British | 52 years |
| Adrian Vincent Mole | Director | 11 Dec 2012 | 1 Jan 2014 | British | 59 years |
| Anne Catherine Ramsay | Secretary | 16 Jun 2008 | 24 Jul 2012 | Other | - |
| Benjamin Matthew Cashin | Director | 16 Jun 2008 | 11 Aug 2011 | British | 54 years |
| Caroline Suzanne Barlow | Director | 1 Oct 2021 | 19 Apr 2023 | British | 57 years |
| Daniel Colin Ward | Director | 31 Dec 2016 | 15 Apr 2021 | British | 44 years |
| David Graham Blanchard | Director | 1 Oct 2012 | 28 Jun 2013 | British | 59 years |
| Elaine Louise Whiteley-todd | Director | 27 Jan 2012 | 15 Nov 2015 | British | 63 years |
| Gerard Eugene Hanson | Director | 18 Jun 2009 | 30 Jun 2012 | British | 71 years |
| Gerard Eugene Hanson | Director | 1 Oct 2012 | 14 May 2014 | British | 71 years |
| Graham Farley | Director | 16 Jun 2008 | 30 Sept 2011 | British | 77 years |
| Jane Elizabeth Mackreth | Secretary | 16 Jun 2008 | 30 Jun 2012 | Other | - |
| Jonathan Roger Chester | Director | 16 Jun 2008 | 18 Jun 2009 | British | 60 years |
| Kate Louise Flaherty | Director | 31 Oct 2017 | 17 Oct 2019 | British | 46 years |
| Keith Joseph Edwards | Director | 21 Apr 2016 | 1 Aug 2025 | British | 61 years |
| Lee James Mills | Director | 18 Apr 2008 | 16 Jun 2008 | British | 68 years |
| Luke Christopher Ashworth | Director | 14 May 2014 | 11 Jul 2014 | British | 44 years |
| Margaret Ruth Bonsall | Director | 25 Jan 2010 | 1 Jul 2011 | British | 70 years |
| Martyn Andrew Trodd | Director | 30 Sept 2011 | 30 Jun 2012 | British | 59 years |
| Martyn Andrew Trodd | Director | 1 Jan 2014 | 11 Nov 2016 | British | 59 years |
| Nick Stuart English | Director | 14 Aug 2011 | 1 Aug 2012 | British | 66 years |
| Nigel Richard Henshaw | Director | 17 Sept 2020 | 29 Mar 2024 | British | 62 years |
| Paul Dean Russell | Director | 16 Jun 2008 | 1 Mar 2009 | British | 57 years |
| Paul Simon Andrews | Director | 28 Jun 2013 | 31 Dec 2016 | British | 56 years |
| Philip Mandeville Wakefield | Director | 1 Mar 2009 | 8 Mar 2013 | British | 66 years |
| Robert Ashley Hughes | Director | 19 Apr 2023 | 23 May 2025 | British | 44 years |
| Robin Jeffrey Monk | Director | 14 Dec 2015 | 6 Feb 2018 | British | 68 years |
| Sandra Jane Stewart | Director | 1 Jan 2022 | 24 Oct 2024 | British | 57 years |
| Sinesh Ramesh Shah | Director | 11 Jul 2014 | 31 Oct 2017 | British | 49 years |
| Steven Craig Pleasant | Director | 16 Jun 2008 | 21 May 2020 | British | 60 years |
| Susan Jayne Traverse | Director | 21 May 2020 | 30 Sept 2021 | British | 60 years |
| Timothy Francis George | Director | 18 Apr 2008 | 16 Jun 2008 | British | 66 years |
| Timothy Francis George | Secretary | 18 Apr 2008 | 16 Jun 2008 | British | - |
| Tom Paul Wilkinson | Director | 6 Feb 2018 | 30 Apr 2021 | British | 50 years |