| Ae Kyung Yoon | Director | 5 Sept 2022 | 2 Aug 2024 | South Korean | 43 years |
| Christopher Paul Smith | Director | 4 Nov 2013 | 24 Dec 2015 | British | 55 years |
| David Stuart Elbourne | Director | 24 Dec 2015 | 26 Jan 2018 | British | 62 years |
| Ian Charles Brent-smith | Director | 25 Jul 2013 | 24 Dec 2015 | British | 72 years |
| Julie Anne Clare | Director | 24 Dec 2015 | 26 Jan 2018 | British | 67 years |
| Justin Llewellyn Blackwood | Director | 25 Jul 2013 | 24 Dec 2015 | British | 76 years |
| Nicholas Simon Parker | Director | 26 Jan 2018 | 5 Sept 2022 | British | 57 years |
| Philip William Kent | Director | 4 Feb 2020 | 2 Aug 2024 | British | 42 years |
| Rollo Andrew Johnstone Wright | Director | 26 Jan 2018 | 5 Sept 2022 | British | 50 years |
| Ronan Niall Kierans | Director | 26 Jan 2018 | 4 Feb 2020 | Irish | 48 years |
| Saira Jane Johnston | Director | 26 Jan 2018 | 8 Dec 2023 | British | 50 years |
| Stephen Campbell Joseph Ellis | Director | 26 Jan 2018 | 28 Jun 2021 | British | 67 years |