| DELL, Blake Pieper ACTIVE | Director | 01 Jun 2024 | | United States | June 1985 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |
| EMBLETON, Alexa Jayne ACTIVE | Director | 01 Sep 2023 | | England | January 1983 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |
| FINCHER, Clenon Anderson ACTIVE | Director | 07 Sep 2022 | | United States | December 1970 | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| FITZGERALD, Patrick Tallman ACTIVE | Director | 01 May 2023 | | United States | October 1974 | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| FORMAN, Alistair William ACTIVE | Director | 30 Nov 2018 | | England | April 1975 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, DN38 6AE, England |
| HOGAN, Paul Lawrence ACTIVE | Director | 07 Sep 2022 | | United States | June 1969 | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| KIEFER, Michael Philip ACTIVE | Director | 01 May 2024 | | United States | October 1975 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |
| HOLDSWORTH, David John RESIGNED | Secretary | 25 Mar 1996 | 30 Nov 2018 | | | First Floor, Organia House, Bradford Road, Guiseley, West Yorkshire, LS20 8NH, England |
| ROBERTS, Donald RESIGNED | Secretary | 07 Sep 2022 | 01 May 2023 | | | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| SMITH, William Robert RESIGNED | Secretary | | 25 Mar 1996 | | | 24 Spofforth Hill, Wetherby, West Yorkshire, LS22 6SE |
| TATTERTON, Ellen Patricia RESIGNED | Secretary | 30 Nov 2018 | 07 Sep 2022 | | | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |
| HENKEN, Arthur RESIGNED | Director | 07 Sep 2022 | 26 Jan 2024 | United States | April 1967 | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| HOLDSWORTH, Alison Jane RESIGNED | Director | 25 Mar 1996 | 30 Nov 2018 | England | May 1964 | First Floor, Organia House, Bradford Road, Guiseley, West Yorkshire, LS20 8NH, England |
| HOLDSWORTH, David John RESIGNED | Director | 25 Mar 1996 | 30 Nov 2018 | England | July 1957 | First Floor, Organia House, Bradford Road, Guiseley, West Yorkshire, LS20 8NH, England |
| JONES, David Hillary RESIGNED | Director | | 25 Mar 1996 | England | December 1950 | The Beeches Brook Lane, Weeton, Leeds, West Yorkshire, LS17 0BE |
| JONES, Denis RESIGNED | Director | | 01 Jun 1996 | | January 1962 | 3 Ballantyre Road, Thackley, Bradford, West Yorkshire, BD10 0SU |
| ROBERTS, Donald RESIGNED | Director | 07 Sep 2022 | 01 May 2023 | United States | February 1957 | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| SMITH, William Robert RESIGNED | Director | | 25 Mar 1996 | | January 1947 | 24 Spofforth Hill, Wetherby, West Yorkshire, LS22 6SE |
| STANSFIELD, Richard Mark RESIGNED | Director | 30 Nov 2018 | 01 Jun 2024 | England | May 1967 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |
| TATTERTON, Ellen Patricia RESIGNED | Director | 30 Nov 2018 | 31 Aug 2023 | England | July 1961 | Melton Ross Quarries, Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE, England |