| ONE ADVISORY LIMITED ACTIVE | Secretary | 14 Jun 2019 | | | | 201, Temple Chambers, 3-7 Temple Avenue, London, EC4Y 0DT, United Kingdom |
| KAYE, Adam ACTIVE | Director | 20 Jan 2009 | | United Kingdom | September 1968 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| MANNING, Sheree Olivia ACTIVE | Director | 24 Feb 2026 | | United Kingdom | March 1979 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| BOASTE, Richard Andrew John Michael RESIGNED | Secretary | 10 Nov 2005 | 29 Oct 2009 | | | 38 Ornan Road, Hampstead, London, NW3 4QB |
| BROCH, Daniel RESIGNED | Secretary | 30 Nov 1999 | 15 Dec 2003 | | | 39 Muswell Avenue, London, N10 2EB |
| DWYER, Daniel John RESIGNED | Nominee Secretary | 25 Nov 1999 | 30 Nov 1999 | | | 6 Brimstone Close, Chelsfield Park, Chelsfield, Kent, BR6 7ST |
| JACOBSON, Philip Ronald RESIGNED | Secretary | 31 Dec 2014 | 01 Nov 2016 | | | 3, Beatrice Court, Totteridge Green, London, N20 8PY, England |
| LIPSCOMB, Lisa RESIGNED | Secretary | 15 Dec 2003 | 10 Nov 2005 | | | 39 Muswell Avenue, London, N10 2EB |
| MYERS, Andrew Leon RESIGNED | Secretary | 29 Oct 2009 | 31 Dec 2014 | | | 12, Haslemere Gardens, London, N3 3EA, England |
| PETERS, Jonathan Steven RESIGNED | Secretary | 01 Nov 2016 | 14 Jun 2019 | | | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| BRICK, Alexander Paul RESIGNED | Director | 20 Jan 2009 | 15 Dec 2010 | England | September 1958 | 12 The Bishops Avenue, London, N2 0AN |
| BROCH, Daniel RESIGNED | Director | 30 Nov 1999 | 21 Nov 2008 | England | December 1967 | 25 Hurst Avenue, London, N6 5TX |
| DWYER, Daniel James RESIGNED | Nominee Director | 25 Nov 1999 | 30 Nov 1999 | | May 1975 | Fieldstock, Vicarage Road, Bexley, Kent, DA5 2AW |
| LAKE, Elizabeth Janet RESIGNED | Director | 05 Dec 2019 | 28 Mar 2022 | England | September 1967 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| LILLY, Crispin RESIGNED | Director | 01 Dec 2014 | 30 Sep 2020 | England | November 1970 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| MANSON, William Glynn RESIGNED | Director | 30 Nov 1999 | 03 May 2007 | | December 1942 | 29 West Hill Park, Merton Lane, London, N6 6NB |
| MYERS, Andrew Leon RESIGNED | Director | 15 Dec 2010 | 01 Dec 2014 | England | March 1972 | 12, Haslemere Gardens, London, N3 3EA, United Kingdom |
| PETERS, Jonathan Steven RESIGNED | Director | 30 Mar 2015 | 14 Jun 2019 | England | December 1969 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| SCRIMGEOUR, Alexander Rupert Gauvain RESIGNED | Director | 12 Jan 2022 | 24 Dec 2025 | England | October 1971 | Studio 4, 2 Downshire Hill, London, NW3 1NR |
| WISE, Paul Louis RESIGNED | Director | 14 Sep 2006 | 28 Feb 2023 | United Kingdom | October 1960 | 17 Wildwood Road, London, NW11 6UL |
| WORSDELL, William John Henry RESIGNED | Director | 28 Jun 2022 | 13 Mar 2026 | United Kingdom | December 1988 | Studio 4, 2 Downshire Hill, London, NW3 1NR |