| BREARLEY, John Richard RESIGNED | Secretary | 11 Aug 2006 | 31 May 2017 | | | The Estates Office, Alnwick Castle, Alnwick, Northumberland, NE66 1NQ |
| COULSON, Kenneth RESIGNED | Secretary | 30 Jan 1998 | 11 Aug 2006 | | | Bridge End, Denwick, Alnwick, Northumberland, NE66 3RF |
| ILDERTON, Lesley Ann RESIGNED | Secretary | 01 Jun 2017 | 03 Apr 2018 | | | Ey, 1 More London Place, London, SE1 2AF |
| MAY MAY & MERRIMANS (SOLICITORS) RESIGNED | Secretary | 24 Oct 1997 | 30 Jan 1998 | | | 12 South Square, Grays Inn, London, WC1R 5HH |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 07 Oct 1997 | 24 Oct 1997 | | | 26, Church Street, London, NW8 8EP |
| BARNES, Colin Leslie RESIGNED | Director | 25 Jan 2016 | 05 Dec 2017 | England | March 1960 | The Estates Office, Alnwick Castle, Alnwick, Northumberland, NE66 1NQ |
| BREARLEY, John Richard RESIGNED | Director | 03 Dec 2007 | 31 May 2017 | United Kingdom | May 1961 | The Estates Office, Alnwick Castle, Alnwick, Northumberland, NE66 1NQ |
| ILDERTON, Lesley Ann RESIGNED | Director | 01 Jun 2017 | 21 Dec 2017 | England | January 1976 | The Estates Office, Alnwick Castle, Alnwick, Northumberland, NE66 1NQ |
| PERCY, Ralph George Algernon, Duke Of Northumberland RESIGNED | Director | 30 Jan 1998 | 21 Dec 2017 | United Kingdom | November 1956 | Alnwick Castle, Alnwick, Northumberland, NE66 1NQ |
| SCHOFIELD, Sandon RESIGNED | Director | 11 Mar 1998 | 07 May 1998 | | April 1949 | 27 Despard Road, London, N19 5NP |
| SCHOFIELD, Sandon RESIGNED | Director | 19 Nov 1997 | 18 Dec 1997 | | April 1949 | 27 Despard Road, London, N19 5NP |
| SMYTH, David Hamilton RESIGNED | Director | 11 Mar 1998 | 07 May 1998 | United Kingdom | December 1952 | 8 Benbow Road, Hammersmith, London, W6 0AG |
| SMYTH, David Hamilton RESIGNED | Director | 24 Oct 1997 | 30 Jan 1998 | United Kingdom | December 1952 | 8 Benbow Road, Hammersmith, London, W6 0AG |
| WALSH, Christopher Phillip RESIGNED | Director | 24 Oct 1997 | 30 Jan 1998 | United Kingdom | June 1946 | Melton Lodge, 29 Wells Road, Malvern, WR14 4RH |
| WILSON, Roderick Charles St John RESIGNED | Director | 30 Jan 1998 | 21 Dec 2017 | United Kingdom | January 1961 | Denwick House, Denwick, Alnwick, Northumberland, NE66 3RE |
| INSTANT COMPANIES LIMITED RESIGNED | Nominee Director | 07 Oct 1997 | 24 Oct 1997 | | | 1, Mitchell Lane, Bristol, Avon, BS1 6BU |