| Alexandra Mary Moffatt | Director | 25 Sept 2019 | 1 May 2020 | British | 46 years |
| Chantal Free | Director | 14 Oct 2019 | 16 Sept 2022 | British | 58 years |
| Charles John Mayo | Director | 12 Jun 2012 | 25 Jul 2012 | British | 66 years |
| Constantine Karayannis | Director | 9 Nov 2020 | 31 Aug 2022 | British | 47 years |
| Craig Hilton Rodgerson | Director | 18 Dec 2013 | 1 Jan 2015 | British | 62 years |
| Erika Bannerman | Director | 20 Jun 2018 | 7 Aug 2019 | British | 55 years |
| Grace Fiona Horton | Director | 26 Feb 2013 | 10 Jun 2013 | British | 55 years |
| Jeremy Simon Warren Smith | Director | 26 Feb 2013 | 10 Jul 2015 | British | 62 years |
| Mark Duncan William Alexander | Director | 26 Feb 2013 | 30 Nov 2013 | British | 64 years |
| Neil Brendon O'connor | Director | 25 Jul 2012 | 26 Feb 2013 | British | 63 years |
| Peter Hamby Hepworth | Director | 15 May 2015 | 21 May 2018 | British | 62 years |
| Richard Andrew Armitage | Director | 12 Jun 2012 | 25 Jul 2012 | British | 69 years |
| Richard Melvyn Marchant | Director | 22 Dec 2015 | 23 Dec 2015 | British | 72 years |
| Richard Simon Waterworth | Director | 10 Jun 2013 | 30 Sept 2019 | British | 61 years |
| Samantha Rosemary Jane Booth | Director | 30 Apr 2020 | 11 Jun 2021 | British | 55 years |
| Timothy David Rossington | Director | 25 Jul 2012 | 26 Feb 2013 | British | 68 years |
| Timothy David Rossington | Secretary | 25 Jul 2012 | 26 Feb 2013 | British | - |