| Alan Brian Lamerton | Director | 23 Jun 1989 | 31 Dec 1991 | British | 81 years |
| Alan Brian Lamerton | Director | 21 Feb 2000 | 31 Jan 2007 | British | 81 years |
| Amec Nominees Limited | Corporate Director | 31 Jan 2007 | 5 Jan 2021 | United Kingdom | - |
| Christopher Laskey Fidler | Secretary | 17 Jul 1989 | 22 Jul 2016 | British | - |
| David Robson | Director | 29 Jan 1998 | 21 Feb 2000 | British | 81 years |
| Gerald William Stanley Mcpeake | Director | 23 Jun 1989 | 31 Dec 1989 | British | 101 years |
| Grant Richmond Ling | Director | 31 Oct 2008 | 19 Nov 2024 | British | 70 years |
| Helen Morrell | Secretary | 22 Jul 2016 | 22 Feb 2017 | - | - |
| Ian Graeme Lloyd Charnock | Director | 1 Jul 2005 | 31 Oct 2008 | British | 64 years |
| Jennifer Ann Warburton | Secretary | 22 Feb 2017 | 16 Feb 2018 | - | - |
| Malcolm Kenyon Eckersall | Director | 8 Jun 1991 | 29 Jan 1998 | British | 81 years |
| Michael John Bardsley | Secretary | 23 Jun 1989 | 17 Jul 1989 | British | - |
| Nigel Alan Higgins | Director | 21 Feb 2000 | 1 Jul 2005 | British | 70 years |
| Peter Brynes | Director | 13 May 1991 | 30 Sept 1994 | British | 76 years |
| Raymond William Mott | Director | 23 Jun 1989 | 1 Jan 1991 | English | 96 years |
| Robert Dalton | Director | 1 Jan 1994 | 30 Jun 2004 | British | 81 years |
