| DELL, Blake Pieper ACTIVE | Director | 01 Jun 2024 | | United States | June 1985 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| EMBLETON, Alexa Jayne ACTIVE | Director | 01 Sep 2023 | | England | January 1983 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| 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 | 13 Feb 2025 | | England | April 1975 | Singleton Birch Limited, Singleton Birch Ltd, Melton Ross Quarries, Barnetby, County, 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, Barnetby, North Lincolnshire, DN38 6AE |
| PALMER, Alan Stephen RESIGNED | Secretary | 22 Nov 1999 | 06 Jan 2000 | | | 6 Dengayne, Basildon, Essex, SS14 1QG |
| ROBERTS, Donald RESIGNED | Secretary | 07 Sep 2022 | 01 May 2023 | | | 2nd Floor, 38-43, Lincoln's Inn Fields, London, WC2A 3PE, United Kingdom |
| SHEHATA, Mina Labib RESIGNED | Secretary | 06 Jan 2000 | 17 Sep 2009 | | | 4150 Saint Georges Road, Toorak, Victoria 3142 |
| TATTERTON, Ellen Patricia RESIGNED | Secretary | 17 Sep 2009 | 07 Sep 2022 | | | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| KEY LEGAL SERVICES (SECRETARIAL) LIMITED RESIGNED | Nominee Secretary | 22 Nov 1999 | 22 Nov 1999 | | | 20 Station Road, Radyr, Cardiff, CF15 8AA |
| BALDWIN, Mark Andrew RESIGNED | Director | 13 Feb 2023 | 09 Aug 2024 | England | November 1965 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| BALDWIN, Mark Andrew RESIGNED | Director | 01 Jun 2020 | 30 Jun 2022 | England | November 1965 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| BIRDEN, Daryl Weston RESIGNED | Director | 17 Sep 2009 | 26 Apr 2013 | England | August 1966 | 4 Westcote Farm, Wold Road, Barrow Upon Humber, North Lincolnshire, DN19 7DY |
| CAMPION, Paul Anthony RESIGNED | Director | 06 Jan 2000 | 17 Sep 2009 | | May 1958 | 73 Eagle Valley, Enniskery, County Wicklow, IRISH, Ireland |
| DRINKHILL, John David RESIGNED | Director | 19 Jul 2000 | 17 Sep 2009 | | January 1952 | 23 Hailey Place, Cranleigh, Surrey, GU6 7EG |
| FOSTER, Stephen William RESIGNED | Director | 26 Apr 2013 | 31 Jul 2024 | England | October 1962 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| 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 |
| PALMER, Kevin Barry RESIGNED | Director | 22 Nov 1999 | 19 Jul 2000 | United Kingdom | November 1968 | 6 Dengayne, Basildon, Essex, SS14 1QG |
| 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 |
| SHEHATA, Mina Labib RESIGNED | Director | 06 Jan 2000 | 17 Sep 2009 | | March 1943 | 4150 Saint Georges Road, Toorak, Victoria 3142 |
| STANSFIELD, Richard Mark RESIGNED | Director | 07 Feb 2018 | 01 Jun 2024 | England | May 1967 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| TATTERTON, Ellen Patricia RESIGNED | Director | 17 Sep 2009 | 31 Aug 2023 | England | July 1961 | Melton Ross Quarries, Barnetby, North Lincolnshire, DN38 6AE |
| KEY LEGAL SERVICES (NOMINEES) LIMITED RESIGNED | Nominee Director | 22 Nov 1999 | 22 Nov 1999 | | | 20 Station Road, Radyr, Cardiff, CF15 8AA |