| Cristiane Ribeiro | Director | 18 Jul 2024 | 4 Sept 2024 | Italian | 45 years |
| David Richard Anthony Mack | Director | 10 Mar 2015 | 11 Dec 2015 | British | 40 years |
| Frans Henricus Nicasius Van Den Heuvel | Director | 11 Dec 2015 | 17 Dec 2015 | Dutch | 63 years |
| Gavin James Andrew Paterson | Director | 10 Mar 2015 | 11 Dec 2015 | British | 45 years |
| Helen Ruth Down | Director | 22 May 2017 | 19 Mar 2020 | British | 47 years |
| John David Faulks | Director | 16 Dec 2015 | 17 Dec 2015 | British | 61 years |
| Jonathan Nicholas Ord | Director | 4 Sept 2024 | 1 Oct 2025 | British | 43 years |
| Luke James Brandon Roberts | Director | 11 Dec 2017 | 18 Jul 2024 | British | 50 years |
| Michael Antony Rand | Director | 17 Dec 2015 | 11 Dec 2017 | English | 48 years |
| Neil Graham Perry | Director | 11 Dec 2015 | 17 Dec 2015 | British | 64 years |
| William Richard Morris | Director | 17 Dec 2015 | 10 Mar 2017 | American | 53 years |