| Adrian Richard Colin Taylor | Director | 10 Jun 2019 | 22 Feb 2023 | British | 61 years |
| Alan Schofield | Director | 25 May 2017 | 2 May 2025 | British | 79 years |
| Allister Jeffrey | Director | 6 Dec 2017 | 29 Nov 2018 | British | 61 years |
| Angela Leanne Hannah Smith | Director | 11 Nov 2015 | 10 Aug 2016 | British | 67 years |
| Charles Edwards | Director | 1 Jan 2023 | 2 May 2025 | British | 33 years |
| Christopher Paul Rule | Director | 10 Jun 2019 | 22 Feb 2023 | British | 46 years |
| David Stanley Borrow | Director | 19 Oct 2015 | 8 May 2017 | British | 73 years |
| Dermot John Mcmullan | Director | 19 Oct 2015 | 1 Jan 2021 | British | 76 years |
| Fiona Scott Stark | Director | 1 Aug 2022 | 30 Jun 2025 | British | 63 years |
| George Gardener Graham | Director | 11 Nov 2015 | 13 Apr 2017 | British | 60 years |
| Greg Smith | Secretary | 19 Oct 2015 | 4 Mar 2025 | - | - |
| Jill Francine Mackenzie | Director | 1 Sept 2018 | 11 Sept 2020 | British | 59 years |
| Michael O'higgins | Director | 19 Oct 2015 | 1 Jul 2021 | Irish | 71 years |
| Peter Rogers | Director | 2 Nov 2015 | 31 Jul 2022 | British | 76 years |
| Robert John Branagh | Director | 1 Jan 2023 | 6 Sept 2024 | British | 61 years |
| Robert William Vandersluis | Director | 2 Nov 2015 | 11 Sept 2020 | British,american | 53 years |
| Sally Bridgeland | Director | 1 Jul 2016 | 22 Feb 2023 | British | 61 years |
| Sarah Eileen Laessig | Director | 1 Sept 2018 | 11 Sept 2020 | British,american | 57 years |
| Susan Christine Martin | Director | 11 Nov 2015 | 26 Apr 2019 | British | 67 years |
| Terence Jagger | Director | 1 Jan 2021 | 31 Dec 2023 | British | 69 years |
| Thomas James Richardson | Director | 11 Jul 2016 | 11 Sept 2020 | British | 50 years |