| Amit Rishi Jaysukh Thakrar | Director | 29 Mar 2022 | 16 Mar 2023 | British | 39 years |
| Andrew David Clapp | Director | 28 Mar 2019 | 26 Aug 2021 | British | 51 years |
| Belinda Faith Knox | Director | 14 Aug 2014 | 5 Oct 2020 | British | 54 years |
| Charles George Alexander Mcleod | Director | 12 Aug 2016 | 12 Jul 2018 | British | 63 years |
| Christophe Andre Bernard Chapron | Director | 26 Jun 2013 | 7 Oct 2013 | French | 62 years |
| David Courtenay Palmer-jones | Director | 26 Jun 2013 | 7 Oct 2013 | British | 63 years |
| Edward Arthur Wilson | Director | 12 Jul 2018 | 28 Mar 2019 | British | 61 years |
| Eiichiro Higashiyama | Director | 16 Mar 2015 | 24 Jul 2017 | Japanese | 56 years |
| Florent Thierry Antoine Duval | Director | 13 Dec 2016 | 1 Dec 2021 | French | 50 years |
| Gershon Daniel Cohen | Director | 22 Nov 2013 | 1 May 2017 | British | 62 years |
| Graham Arthur Mckenna-mayes | Director | 7 Oct 2013 | 28 Jun 2021 | British | 58 years |
| Halim Bulent Artuc | Director | 5 Oct 2020 | 31 Oct 2023 | Turkish | 44 years |
| Ian Anthony Sexton | Director | 7 Oct 2013 | 31 Mar 2020 | British | 70 years |
| John Brian Marshall | Director | 22 Nov 2013 | 16 Mar 2015 | British | 70 years |
| Joseph Mark Linney | Director | 26 Aug 2021 | 29 Mar 2022 | British | 68 years |
| Kenneth John Simpson | Director | 1 May 2017 | 6 Dec 2017 | British | 61 years |
| Kevan Paul Sproul | Director | 7 Mar 2014 | 13 Dec 2016 | British | 64 years |
| Kevin Brown | Director | 12 Aug 2016 | 6 Dec 2017 | British | 50 years |
| Masashi Kanai | Director | 1 Sept 2021 | 1 Apr 2023 | Japanese | 54 years |
| Nicholas Tommy Cole | Director | 22 Nov 2013 | 12 Aug 2016 | British | 48 years |
| Nicholas Tommy Cole | Director | 6 Dec 2017 | 28 Mar 2019 | British | 48 years |
| Paul Gavin | Director | 7 Oct 2013 | 7 Mar 2014 | British | 60 years |
| Philip Peter Ashbrook | Director | 28 Mar 2019 | 21 Dec 2022 | British | 66 years |
| Tsuneharu Hibino | Director | 22 Nov 2013 | 14 Aug 2014 | Japanese | 50 years |
| Yuji Suzuki | Director | 24 Jul 2017 | 20 Jul 2021 | Japanese | 56 years |