| Adam Charles Robert Golton | Director | 10 Oct 2016 | 21 Mar 2017 | British | 61 years |
| Adam Charles Robert Golton | Director | 16 May 2017 | 29 Oct 2018 | British | 61 years |
| Antoine Jan Macgiel Valk | Director | 25 Nov 2011 | 31 Dec 2011 | Dutch | 77 years |
| Brodies Secretarial Services Limited | Corporate Secretary | 2 Mar 2016 | 28 Feb 2023 | United Kingdom | - |
| David Andrew Kaye | Director | 10 Aug 2020 | 14 Apr 2023 | British | 64 years |
| Dominic Daniel Gerard Booth | Director | 25 Nov 2011 | 15 Jun 2023 | British | 63 years |
| Halco Secretaries Limited | Corporate Secretary | 25 Nov 2011 | 2 Mar 2016 | United Kingdom | - |
| Jamie Neil Peter Burles | Director | 10 Oct 2016 | 21 Mar 2017 | British | 54 years |
| Jamie Neil Peter Burles | Director | 16 May 2017 | 8 Oct 2024 | British | 54 years |
| Jeffrey John Krijn Hoogesteger | Director | 1 Jan 2012 | 15 Jun 2015 | Dutch | 62 years |
| Julian Edwards | Director | 15 Jun 2015 | 21 Mar 2017 | British | 57 years |
| Julian Edwards | Director | 16 May 2017 | 10 Aug 2020 | British | 57 years |
| Martin Henry Beable | Director | 8 Oct 2024 | 12 Oct 2025 | British | 43 years |
| Masahiro Mizuhashi | Director | 21 Mar 2017 | 26 Jun 2018 | Japanese | 58 years |
| Matt Dolphin | Director | 29 Oct 2018 | 27 Aug 2022 | British | 58 years |
| Nobuyoshi Umezawa | Director | 21 Mar 2017 | 20 Apr 2020 | Japanese | 54 years |
| Shinichi Ban | Director | 20 Apr 2023 | 5 Oct 2023 | Japanese | 50 years |
| Soichi Nishihara | Director | 6 Oct 2022 | 21 May 2024 | Japanese | 47 years |
| Takahiro Sakai | Director | 6 Oct 2022 | 20 Apr 2023 | Japanese | 56 years |
| Yasumitsu Tanaka | Director | 16 May 2017 | 6 Oct 2022 | Japanese | 57 years |
| Yoshinobu Nakajima | Director | 21 May 2024 | 24 Oct 2025 | Japanese | 46 years |
| Yuichiroh Ieda | Director | 20 Apr 2020 | 6 Oct 2022 | Japanese | 48 years |
