| Alan Ross Mcalister | Director | 21 Mar 2002 | 12 May 2003 | British | 69 years |
| Alan Travis | Director | 21 Aug 2003 | 30 Jan 2004 | British | 55 years |
| Anita Catherine Hanna | Director | 12 May 2003 | 21 Aug 2003 | British | 49 years |
| Christopher Richard Field | Director | 15 Dec 2006 | 24 Apr 2014 | British | 71 years |
| Eamon O'hare | Director | 21 Aug 2003 | 4 Jul 2023 | Irish | 78 years |
| Gaynor Birley Smith | Director | 22 Jan 2004 | 15 Dec 2006 | English | 60 years |
| Gregor Steven Mr Hamilton | Director | 12 May 2003 | 21 Aug 2003 | British | 63 years |
| John David Harris | Director | 24 Apr 2014 | 7 Jul 2014 | British | 61 years |
| John Mcdonagh | Director | 31 May 2023 | 26 Feb 2024 | British | 57 years |
| John Stephen Gordon | Director | 18 May 2015 | 5 Oct 2015 | British | 64 years |
| Joseph Eugene Philipsz | Director | 7 Jul 2014 | 18 May 2015 | British,irish | 59 years |
| Leo William Mckenna | Director | 30 Aug 2018 | 31 May 2023 | Irish | 60 years |
| Nicholas James Kerr Taylor | Director | 21 Mar 2002 | 12 May 2003 | British | 55 years |
| Patrick Matthew Duffy | Director | 21 Aug 2003 | 4 Jul 2023 | Northern Irish | 70 years |
| Patrick Matthew Duffy | Secretary | 21 Mar 2002 | 4 Jul 2023 | Irish | - |
| Paul Robert Hepburn | Director | 2 Feb 2004 | 1 Oct 2009 | British | 57 years |
| Peter Kenneth Johnstone | Director | 5 Oct 2015 | 30 Aug 2018 | British | 61 years |
| Resolis Limited | Secretary | 4 Jul 2023 | 4 Jul 2023 | United Kingdom | - |
| Robert David Vince | Director | 21 Aug 2003 | 22 Jan 2004 | British | 62 years |
| Stephen John Mallion | Director | 1 Oct 2009 | 31 Mar 2019 | British | 69 years |