| Charles Bondi | Director | 9 Mar 2015 | 8 Jan 2021 | British | 54 years |
| Claire Lucy Burden | Director | 5 Nov 2014 | 26 Feb 2015 | British | 44 years |
| Cristiane Ribeiro | Director | 18 Jul 2024 | 4 Sept 2024 | Italian | 45 years |
| Graham David Harding | Director | 5 Nov 2014 | 18 Mar 2015 | British | 60 years |
| Jonathan Nicholas Ord | Director | 4 Sept 2024 | 1 Oct 2025 | British | 43 years |
| Kenneth Reid Ross | Director | 4 Apr 2016 | 8 Jan 2021 | British | 58 years |
| Luke James Brandon Roberts | Director | 8 Jan 2021 | 18 Jul 2024 | British | 50 years |
| Rupert Sherman John Cotterell | Director | 26 Feb 2015 | 18 Mar 2015 | British | 57 years |
| Simon Charles Grist Stevens | Director | 9 Mar 2015 | 4 Apr 2016 | British | 74 years |