| Allan Mathieson | Secretary | 21 Feb 1989 | 30 Jun 1997 | British | - |
| Andrew Christopher Bolter | Director | 3 Sept 2012 | 4 Apr 2014 | British | 56 years |
| Anthony John Rush | Director | 21 Feb 1989 | 3 Nov 1989 | British | 80 years |
| Bernard Desmond Andrews | Director | 26 Oct 1989 | 26 Mar 1992 | British | 92 years |
| Charles Novotny | Director | 26 Mar 1992 | 12 Aug 1992 | British | 88 years |
| Christopher Gordon Reynolds | Director | 17 Jan 2008 | 18 May 2009 | British | 73 years |
| David Anthony Grady | Director | 18 May 2009 | 11 Jun 2010 | British | 57 years |
| David Low Warrender | Director | 21 Feb 1989 | 31 Jul 1991 | British | 95 years |
| David Nicol Scott | Director | 31 Jul 1989 | 30 Apr 1997 | British | 79 years |
| Fiona Puleston Penhallurick | Director | 4 Apr 2014 | 15 Mar 2016 | British | 59 years |
| Jack Mawdsley | Director | 21 Feb 1989 | 12 Aug 1992 | British | 88 years |
| James Joseph Pearse | Director | 1 Jun 1996 | 30 Apr 1997 | Irish | 81 years |
| James Mackay Anderson | Director | 21 Feb 1989 | 31 Aug 1989 | British | - |
| James Richard Stirk | Director | 11 Jun 2010 | 14 Dec 2012 | British | 67 years |
| James Richard Stirk | Secretary | 30 Jun 1997 | 3 Feb 2004 | British | - |
| John Ferguson Bowater | Director | 30 Apr 1997 | 3 Feb 2004 | British | 77 years |
| Lafarge Tarmac Directors (uk) Limited | Corporate Director | 20 Jan 2014 | 28 Aug 2015 | United Kingdom | - |
| Michael John Choules | Director | 27 Aug 2015 | 9 Apr 2021 | British | 66 years |
| Neil Boyle | Director | 31 Jul 1991 | 30 Jun 1992 | British | 94 years |
| Peter Francis Davenport | Director | 18 May 1990 | 12 Aug 1992 | British | 89 years |
| Peter John Gillatt | Director | 12 Aug 1992 | 1 Jun 1996 | British | 66 years |
| Richard John Wood | Director | 9 Apr 2021 | 30 Sept 2022 | British | 54 years |
| Roy James Harrison | Director | 26 Oct 1989 | 1 Jul 1992 | British | 79 years |
| Ruth Sarah Button | Director | 30 Sept 2022 | 1 Oct 2025 | British | 42 years |
| Tarmac Nominees Limited | Corporate Director | 2 Feb 2004 | 20 Jan 2014 | United Kingdom | - |
| Tarmac Nominees Two Limited | Corporate Director | 2 Feb 2004 | 20 Jan 2014 | United Kingdom | - |
| Tarmac Nominees Two Limited | Corporate Secretary | 3 Feb 2004 | 20 Jan 2014 | United Kingdom | - |
| William Andrew Aeneas Macleod | Director | 1 Jan 1993 | 31 Mar 1997 | British | 82 years |