| Andrew Kenneth Muir-simpson | Director | 28 Feb 2015 | 27 Nov 2015 | British | 48 years |
| Anthony Stephen Critchlow | Director | 4 Apr 2011 | 27 Nov 2015 | British | 66 years |
| Constance Wing-yin Lee | Director | 30 Jun 2017 | 25 Mar 2021 | British,american | 52 years |
| David Anthony Byrne | Director | 4 Apr 2011 | 7 Aug 2014 | British | 50 years |
| Faheem Zaka Sheikh | Director | 1 May 2023 | 2 Jun 2025 | British | 42 years |
| Katy Elizabeth Hogg | Director | 27 Nov 2015 | 30 Jun 2017 | British | 46 years |
| Laurence Jon Fumagalli | Director | 30 Jun 2017 | 1 May 2023 | British | 54 years |
| Mark Stanton Evans | Director | 27 Nov 2015 | 30 Jun 2017 | British | 54 years |
| Nicola Clemo | Director | 7 Aug 2014 | 28 Feb 2015 | British | 42 years |
| Pablo Mariano Hernandez De Riquer | Director | 1 May 2023 | 7 May 2025 | Spanish | 41 years |
| Stephen Bernard Lilley | Director | 30 Jun 2017 | 1 May 2023 | British | 58 years |
| Victor Sergio Monje Diez | Director | 30 Jun 2017 | 29 Jul 2021 | Spanish | 41 years |