| Achal Prakash Bhuwania | Director | 1 Feb 2019 | 5 Aug 2020 | British | 47 years |
| Charles Desmond Kyrle Reid | Director | 17 Dec 2012 | 29 Mar 2018 | British | 45 years |
| Florian Tobias Kron | Director | 9 Dec 2024 | 26 Aug 2025 | German | 37 years |
| Jemma Louise Sherman | Director | 22 Mar 2022 | 12 Dec 2024 | British | 40 years |
| Jonathan Charles Smith | Director | 1 Feb 2019 | 27 Sept 2019 | British | 46 years |
| Joseph Charles Bayston Jones | Director | 5 Aug 2020 | 22 Mar 2022 | British | 32 years |
| Peter George Raftery | Director | 17 Dec 2012 | 1 Feb 2019 | British | 58 years |
| Roger Siegfried Alexander Kraemer | Director | 2 Apr 2019 | 22 Mar 2022 | German | 58 years |
| Stephane Christophe Tetot | Director | 29 Mar 2018 | 1 Feb 2019 | French | 45 years |