| Alan Raymond Williams | Director | 8 Jan 2001 | 19 Jun 2006 | British | 80 years |
| Andrew Taylor | Director | 5 May 2015 | 26 Oct 2015 | British | 53 years |
| Charles Compton Anthony Glossop | Director | 8 Jan 2001 | 16 Aug 2004 | British | 85 years |
| Chin Tui Lin | Director | 6 Jan 1994 | 28 Feb 2000 | British | 79 years |
| David Smith | Director | 16 Jun 2023 | 31 Jan 2025 | British | 58 years |
| Guy Charles Gusterson | Director | 30 Jun 2017 | 31 Mar 2022 | British | 56 years |
| Jen Kai Chen | Director | 7 Dec 1998 | 30 Nov 2000 | British | 86 years |
| John Andrew William Dodds | Director | 18 Jul 2008 | 30 Nov 2014 | British | 70 years |
| John Christopher Humphreys | Secretary | 1 Nov 2006 | 2 Jul 2007 | British | - |
| Jon Messent | Secretary | 2 Jul 2007 | 28 Nov 2008 | British | - |
| Lisa Ann Katherine Minns | Director | 29 Feb 2024 | 31 Jan 2025 | Irish | 51 years |
| Michael Edward Dunn | Director | 1 Dec 2010 | 31 May 2015 | British | 58 years |
| Modwen Corporate Services Limited | Corporate Secretary | 28 Nov 2008 | 31 Jan 2025 | United Kingdom | - |
| Richard Lindsay Froggatt | Director | 11 Nov 2004 | 19 Jun 2006 | British | 77 years |
| Robert David Howell Williams | Director | 31 Mar 2022 | 16 Jun 2023 | British | 56 years |
| Robert Flavell | Director | 26 Mar 2020 | 16 Jun 2023 | British | 55 years |
| Robert Jan Hudson | Director | 26 Oct 2015 | 26 Mar 2020 | British | 53 years |
| Robert John Evans | Director | 29 Jun 2023 | 29 Feb 2024 | British | 53 years |
| Rupert Timothy Wood | Director | 15 Mar 2018 | 31 Jul 2019 | British | 53 years |
| Stephen Francis Prosser | Director | 1 Dec 2014 | 30 Jun 2017 | Welsh | 62 years |
| Susan Karen Johnson-brett | Secretary | 8 Jan 2001 | 15 Aug 2006 | British | - |
| Timothy Paul Haywood | Director | 16 Aug 2004 | 26 Nov 2010 | British | 63 years |
| Timothy Paul Haywood | Secretary | 15 Aug 2006 | 1 Nov 2006 | British | - |
| Wei Tong Lin | Director | 6 Jan 1994 | 8 Jan 2001 | British | 78 years |
| William Alder Oliver | Director | 11 Nov 2004 | 30 Nov 2016 | British | 70 years |
| Yan Jen Lin | Director | 30 Nov 2000 | 8 Jan 2001 | British | 76 years |
| Yau Jen Lin | Secretary | 6 Jan 1994 | 8 Jan 2001 | British | - |
