| Alexandra Clare Thomas Hathaway | Director | 8 Jan 2025 | 7 Aug 2025 | British | 52 years |
| Alison Jane Brittain | Director | 12 Nov 2015 | 12 Oct 2022 | British | 61 years |
| Andrew Dancox | Director | 18 Aug 2014 | 30 Sept 2017 | British | 61 years |
| Andrew Harrison | Director | 18 Aug 2014 | 12 Nov 2015 | British | 69 years |
| Christopher David Vaughan | Director | 12 Nov 2015 | 22 Jun 2023 | British | 62 years |
| Daniel Richard Levere | Director | 12 Oct 2022 | 20 Dec 2024 | British | 46 years |
| Hemantkumar Kiritbhai Patel | Director | 22 Mar 2022 | 12 Oct 2022 | British | 57 years |
| Mark Anderson | Director | 12 Nov 2015 | 12 Oct 2022 | British | 55 years |
| Matthew Yates | Director | 25 Aug 2017 | 10 Jan 2025 | British | 49 years |
| Nicholas Theodore Cadbury | Director | 18 Aug 2014 | 21 Mar 2022 | British | 60 years |
| Patrick Joseph Anthony Dempsey | Director | 18 Aug 2014 | 17 Feb 2015 | British | 67 years |
| Paul Alick Macpherson | Director | 18 Aug 2014 | 13 Nov 2014 | Canadian | 65 years |
| Ratnesh Mohan Verma | Director | 9 Jun 2015 | 3 Aug 2018 | Indian | 57 years |
| Russell William Fairhurst | Director | 19 Jun 2007 | 3 Aug 2018 | British | 63 years |
| Simon Charles Barratt | Director | 19 Jun 2007 | 12 Nov 2015 | British | 67 years |
