| Alice Sarah Louise Cummings | Director | 31 May 2016 | 8 Jul 2019 | British | 63 years |
| Andrew Geoffrey Searle | Director | 15 Apr 2020 | 23 Dec 2020 | British | 52 years |
| David Martin Petrie | Director | 8 Jul 2019 | 23 Dec 2020 | British | 57 years |
| Gavin Kaye | Secretary | 18 Mar 2013 | 11 Sept 2014 | British | - |
| Gavin Mark Kaye | Director | 18 Mar 2013 | 11 Sept 2014 | British | 63 years |
| Gavin William Rimmer | Director | 25 Jan 2006 | 5 Jul 2006 | British | 58 years |
| Gordon Roy Peters | Director | 9 Feb 2012 | 19 Mar 2013 | British | 90 years |
| Jonathan Christopher Lowe | Director | 23 Dec 2020 | 3 Sept 2021 | British | 62 years |
| Julian Mark Griggs | Director | 1 Apr 2009 | 14 Jun 2010 | British | 57 years |
| Lee Jon Ali | Director | 23 Dec 2020 | 24 Sept 2021 | British | 48 years |
| Martin Ewart Johnson | Director | 18 Jan 2006 | 25 Jul 2008 | British | 68 years |
| Michael David Allen Benton | Director | 18 Mar 2013 | 31 May 2016 | British | 74 years |
| Neal David Edwards | Director | 5 Jul 2006 | 20 Apr 2007 | British | 65 years |
| Neal David Edwards | Director | 22 Aug 2008 | 18 Jun 2010 | British | 65 years |
| Paul Francis Bibby | Director | 25 Jan 2006 | 31 May 2016 | British | 62 years |
| Richard James Bradford | Director | 31 May 2016 | 23 Dec 2020 | British | 63 years |
| Simon Leo Belfer | Director | 9 Feb 2022 | 17 Mar 2023 | British | 63 years |
| Stephen James Logan | Director | 18 Jan 2006 | 31 Jul 2013 | British | 71 years |
| Stephen James Logan | Secretary | 18 Jan 2006 | 19 Mar 2013 | British | - |
| Thomas Beaufoy | Director | 1 Sept 2009 | 18 Jun 2010 | British | 54 years |
| Victoria Gayle Maskill | Director | 18 Mar 2013 | 31 May 2016 | British | 51 years |