| Andrew Charles Lane | Director | 12 Dec 2016 | 1 Aug 2020 | British | 63 years |
| Andrew Phillip Milnes | Director | 29 Jan 2016 | 7 Nov 2016 | British | 62 years |
| David James Bucknall | Director | 29 Jan 2016 | 12 Dec 2016 | British | 58 years |
| Emil Isa Oglu Ismayilov | Director | 1 Dec 2020 | 1 Mar 2024 | Azerbaijani | 48 years |
| Emma Louise Delaney-mc Knight | Director | 12 Dec 2016 | 17 Jan 2020 | Irish | 53 years |
| Ian Jonathan Evans | Director | 1 Nov 2019 | 20 May 2020 | British | 61 years |
| Norman Constantine Christie | Director | 1 Jan 2020 | 1 Dec 2020 | American | 65 years |
| Oksana Victorivna Dembitska | Director | 1 Aug 2020 | 5 Aug 2022 | British | 54 years |
| Oksana Victorivna Dembitska | Director | 8 Dec 2022 | 5 Jul 2024 | British | 54 years |
| Paul Jonathan Reed | Director | 29 Jan 2016 | 12 Dec 2016 | British | 70 years |
| Russell Irving Smith | Director | 12 Dec 2016 | 1 Dec 2020 | British | 66 years |
