| Alan Philip Scott | Director | 26 Feb 2013 | 30 Aug 2013 | British | 60 years |
| Andrew Stuart Cunningham Church | Secretary | 25 Apr 1994 | 25 Apr 1994 | British | - |
| Andrew Stuart Cunningham Church | Secretary | 25 Apr 1994 | 21 Feb 2002 | British | - |
| Anthony James Jackson | Director | 15 Apr 2002 | 12 Feb 2003 | British | 66 years |
| Beverley Edward John Dew | Director | 30 Aug 2013 | 5 Dec 2014 | British | 55 years |
| Bill Kingwill | Director | 26 Feb 2013 | 24 Oct 2014 | British | 65 years |
| Birse Group Services Limited | Corporate Secretary | 21 Feb 2002 | 15 Oct 2004 | United Kingdom | - |
| Charles Nicholas Pollard | Director | 22 Oct 2014 | 1 Jul 2015 | British | 68 years |
| Christopher Charles Millard | Director | 6 Mar 2015 | 31 Dec 2015 | British | 65 years |
| David George Goose | Director | 13 Apr 1995 | 23 Jul 1999 | British | 79 years |
| David Gordon Smith | Director | 25 Jan 2019 | 31 Dec 2019 | British | 66 years |
| David John Donaldson | Director | 21 May 2013 | 15 Aug 2014 | British | 74 years |
| David John Downing | Director | 18 Oct 1991 | 6 Mar 1992 | British | 84 years |
| David John Swales | Director | 18 Dec 1991 | 25 Apr 1994 | British | 77 years |
| David John Swales | Secretary | 18 Oct 1991 | 25 Apr 1994 | British | - |
| David Samuel Kennedy | Director | 24 Mar 2016 | 31 Jan 2017 | British | 68 years |
| Dean John Banks | Director | 8 Jun 2015 | 10 Feb 2021 | British | 55 years |
| Emma Campbell | Secretary | 14 Oct 2010 | 1 Nov 2012 | - | - |
| Graham Ronald Hill | Director | 14 Jun 2017 | 17 Feb 2021 | British | 64 years |
| Gregory William Mutch | Secretary | 1 Nov 2012 | 30 Sept 2015 | - | - |
| Heather Ann Craven | Director | 21 Feb 2002 | 1 Jul 2002 | British | 65 years |
| Hector Macaulay | Director | 16 Nov 2012 | 21 May 2013 | British | 63 years |
| James Joseph Duffy | Director | 8 Jun 2016 | 17 Mar 2021 | British | 60 years |
| John Anthony Meade Walsh | Director | 28 Jun 2013 | 28 Oct 2013 | British | 62 years |
| John Keaveney | Director | 30 Jan 2015 | 30 Jun 2017 | Irish | 54 years |
| Jonathan Granville Winter | Director | 1 Jul 2017 | 24 Sept 2018 | British | 66 years |
| Mark Farrah | Director | 1 May 2004 | 13 Aug 2017 | British | 62 years |
| Mark Lloyd Cutler | Director | 11 Mar 2014 | 11 Nov 2014 | British | 58 years |
| Mark Richard Johnson | Director | 17 Mar 2010 | 16 Nov 2012 | British | 65 years |
| Mark William Bullock | Director | 10 Feb 2021 | 31 Dec 2023 | British | 63 years |
| Marshall Duncan Scott | Director | 17 Mar 2010 | 12 Mar 2012 | British | 80 years |
| Martin Budden | Director | 13 Apr 1995 | 1 Jul 2002 | British | 69 years |
| Michael Alan Griffin | Director | 20 Apr 1995 | 28 Apr 1995 | British | 73 years |
| Michael John Peasland | Director | 21 May 2013 | 31 Dec 2013 | British | 74 years |
| Murray John Easton | Director | 22 Mar 2011 | 25 Jun 2014 | British | 71 years |
| Neil Patterson | Director | 26 Feb 2013 | 30 Jan 2015 | British | 68 years |
| Paul Francis Gandy | Director | 26 Aug 2014 | 24 Mar 2016 | British | 66 years |
| Peter Gareth Watson | Director | 23 Jul 1999 | 21 Feb 2002 | British | 76 years |
| Peter Malcolm Birse | Director | 18 Oct 1991 | 23 Jul 1999 | British | 84 years |
| Philip Hugh Morris | Secretary | 26 Feb 2010 | 14 Oct 2010 | - | - |
| Robert Adams | Director | 15 Apr 2002 | 22 Mar 2011 | British | 73 years |
| Robert Vincent Walker | Director | 26 Feb 2013 | 24 May 2013 | British | 68 years |
| Stephen James Kennedy | Director | 17 Jun 2010 | 21 May 2013 | British | 66 years |
| Stephen John Waite | Director | 20 Mar 2013 | 1 Jul 2013 | British | 74 years |
| Stephen Paul Barker | Director | 15 Apr 2002 | 12 Feb 2003 | British | 71 years |
| Stuart Edward Curl | Director | 5 Dec 2014 | 31 May 2016 | British | 65 years |
| Thomas Allan Edgcumbe | Director | 14 Aug 2017 | 28 Feb 2022 | British | 46 years |
| Timothy Mark Thrall | Director | 15 Apr 2002 | 26 Feb 2010 | British | 64 years |
| Timothy Mark Thrall | Secretary | 15 Oct 2004 | 26 Feb 2010 | British | - |
| William Owen Aitchison | Director | 26 Feb 2013 | 30 May 2014 | British | 72 years |