| Alan Cockshaw | Director | 8 Jun 1991 | 18 Jan 1995 | British | 89 years |
| Amec Nominees Limited | Corporate Director | 18 Jan 1995 | 11 Aug 2020 | United Kingdom | - |
| Andrew Stuart Mclean | Director | 11 Aug 2020 | 31 Aug 2024 | British | 56 years |
| Charles Ian Bateman | Director | 8 Jun 1991 | 28 May 1993 | British | 91 years |
| Christopher Laskey Fidler | Director | 31 Aug 2009 | 22 Jul 2016 | British | 71 years |
| Christopher Laskey Fidler | Secretary | 16 Jun 2009 | 31 Aug 2009 | British | - |
| Colin Fellowes | Secretary | 15 Sept 1995 | 16 Jun 2009 | British | - |
| Helen Morrell | Secretary | 4 Dec 2015 | 22 Feb 2017 | - | - |
| Iain Angus Jones | Secretary | 16 Feb 2018 | 12 Jun 2024 | - | - |
| Jennifer Ann Warburton | Director | 22 Jul 2016 | 16 Feb 2018 | British | 57 years |
| Jennifer Ann Warburton | Secretary | 22 Feb 2017 | 16 Feb 2018 | - | - |
| John Swinburne Bateson | Director | 8 Jun 1991 | 18 Jan 1995 | British | 84 years |
| Kim Andrea Hand | Secretary | 31 Aug 2009 | 4 Dec 2015 | British | - |
| Mark James Watson | Director | 16 Feb 2018 | 31 Dec 2020 | British | 62 years |
| Michael John Bardsley | Director | 18 Jan 1995 | 5 Apr 2001 | British | 82 years |
| Michael John Bardsley | Secretary | 8 Jun 1991 | 18 Jan 1995 | British | - |
| Nigel James Maxwell Davies | Secretary | 18 Jan 1995 | 15 Sept 1995 | British | - |
| Oswald Davies | Director | 8 Jun 1991 | 18 Jan 1995 | British | 106 years |
| Peter James Holland | Director | 5 Apr 2001 | 31 Aug 2009 | British | 79 years |
