| Andrew Charles Smith | Director | 11 May 1991 | 30 Mar 2001 | British | 80 years |
| Andrew Charles Smith | Secretary | 11 May 1991 | 28 Nov 2000 | British | - |
| Andrew Christopher Bolter | Director | 1 Aug 2011 | 4 Apr 2014 | British | 56 years |
| Christopher Gordon Reynolds | Director | 17 Dec 1999 | 18 May 2009 | British | 73 years |
| Christopher Malcolm Henry Kemp | Director | 11 May 1991 | 17 Dec 1999 | British | 75 years |
| David Anthony Grady | Director | 18 May 2009 | 11 Jun 2010 | British | 57 years |
| Deborah Grimason | Director | 28 Jun 2013 | 20 Nov 2013 | British | 63 years |
| Fiona Puleston Penhallurick | Director | 4 Apr 2014 | 15 Mar 2016 | British | 59 years |
| James Richard Stirk | Director | 4 Aug 1999 | 14 Dec 2012 | British | 67 years |
| James Richard Stirk | Secretary | 28 Nov 2000 | 30 Nov 2012 | British | - |
| John Richard Bradshaw | Secretary | 30 Nov 2012 | 29 Jun 2013 | British | - |
| John Richard Bradshaw | Director | 17 Dec 1999 | 29 Jun 2013 | British | 71 years |
| Lafarge Tarmac Directors (uk) Limited | Corporate Director | 28 Jun 2013 | 27 Aug 2015 | United Kingdom | - |
| Michael John Choules | Director | 27 Aug 2015 | 9 Apr 2021 | British | 66 years |
| Richard John Wood | Director | 9 Apr 2021 | 30 Sept 2022 | British | 54 years |
| Ruth Sarah Button | Director | 30 Sept 2022 | 1 Oct 2025 | British | 42 years |
