| GODDARD, Jay Robin ACTIVE | Director | 21 Apr 2025 | | United Kingdom | September 1982 | Borde Hill House, Borde Hill Lane, Haywards Heath, RH16 1XP, England |
| MILLS, Peter ACTIVE | Director | 08 Apr 2024 | | England | April 1962 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| STEPHENSON CLARKE, Andrewjohn Patrick ACTIVE | Director | 02 Oct 2009 | | England | November 1955 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| STEPHENSON CLARKE, Eleni Charalambos ACTIVE | Director | 29 Jul 2019 | | United Kingdom | October 1951 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| UPSON, Timothy Martin, Dr ACTIVE | Director | 11 Aug 2017 | | England | August 1966 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| BOWMAN, Peter Francis RESIGNED | Secretary | 17 Oct 1994 | 10 Sep 2001 | | | 4 Duncton Close, Haywards Heath, West Sussex, RH16 4DX |
| GARDINER, James Murray Gouvenot RESIGNED | Secretary | 29 Jul 2019 | 31 Dec 2021 | | | Garden Office, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| GRANLUND, Charles Richard Alexander RESIGNED | Secretary | 01 Apr 2008 | 16 Oct 2012 | | | Smiths Gore, Exchange House, Petworth, West Sussex, GU28 0BF |
| MAJOR, John RESIGNED | Secretary | 16 Oct 2001 | 17 Nov 2006 | | | South Green, Piddinghoe, Newhaven, East Sussex, BN9 9AP |
| MORRIS, Jonathan RESIGNED | Secretary | 16 Oct 2012 | 09 Jul 2015 | | | The Estate Office Borde Hill Lane, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| RANKIN, Marylyn Ann RESIGNED | Secretary | | 16 Oct 1994 | | | 57 Mackie Avenue, Hassocks, West Sussex, BN6 8NJ |
| STANLEY, Thomas David RESIGNED | Secretary | 17 Nov 2006 | 01 Apr 2008 | | | 68 Dog Kennels Cottages, Duncton, Petworth, West Sussex, GU28 0LU |
| STEPHENSON CLARKE, Andrewjohn Patrick RESIGNED | Secretary | 09 Jul 2015 | 29 Jul 2019 | | | Borde Hill House, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| BRICKELL, Christopher David RESIGNED | Director | 13 Dec 1993 | 12 Feb 1997 | United Kingdom | June 1932 | The Camber, Ths Street Nutbourne, Pulborough, West Sussex, RH20 2HE |
| CALVOCORESSI, Ian Melville RESIGNED | Director | | 29 Sep 1997 | | April 1919 | Court Lodge, Westerham, Kent, TN16 2DH |
| CLARKE, Andrew John Patrick Stephenson RESIGNED | Director | | 29 Sep 1997 | United Kingdom | November 1955 | Borde Hill Estate Office, Haywards Heath, Sussex, RH16 1XP |
| CLARKE, Rory Saint George Stephenson RESIGNED | Director | 29 Sep 1997 | 11 Aug 2017 | England | January 1934 | Cinderhill House, Horsted Keynes, West Sussex, RH17 7BD |
| DE JAGER, Dick RESIGNED | Director | 01 Jun 1992 | 31 Jul 1995 | | March 1928 | The Old Rectory Rectory Lane, Sutton Valence, Maidstone, Kent, ME17 3BS |
| DOE, Brian Arthur RESIGNED | Director | | 29 Sep 1997 | | April 1932 | 4 Spring Head Road, Kemsing, Sevenoaks, Kent, TN15 6QL |
| EASTELL, Philip Robert RESIGNED | Director | 19 Feb 2022 | 30 Aug 2024 | England | May 1961 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| ERSKINE, Charles Macintyre RESIGNED | Director | 23 Mar 2006 | 30 Oct 2006 | United Kingdom | February 1940 | 12 Talma Gardens, Twickenham, Middlesex, TW2 7RD |
| ERSKINE, Charles Macintyre RESIGNED | Director | | 23 Mar 2006 | United Kingdom | February 1940 | 12 Talma Gardens, Twickenham, Middlesex, TW2 7RD |
| GARDINER, James Murray Gouvenot RESIGNED | Director | 12 Feb 1997 | 31 Dec 2021 | England | October 1950 | Garden Office, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| HARDMAN, David RESIGNED | Director | 14 Sep 2007 | 05 Jul 2013 | United Kingdom | September 1953 | 1, Downshire Terrace, Street Lane, Ardingly, West Sussex, RH17 6UL |
| HOLLIS, Graham Duncan RESIGNED | Director | 29 Jul 2019 | 20 Feb 2026 | England | March 1962 | Borde Hill, Borde Hill Lane, Haywards Heath, West Sussex, RH16 1XP, England |
| LODER, Giles, Sir RESIGNED | Director | | 01 Mar 1993 | | November 1914 | Ockendon House, Cockfield, Haywards Heath, Sussex, RH17 5LV |
| MAIN, John RESIGNED | Director | | 29 Sep 1997 | | September 1940 | Royal Botanic Garden, Edinburgh, FH3 5LR |
| MCQUIRE, John RESIGNED | Director | | 29 Sep 1997 | | September 1932 | Deer Dell Botany Hill, Seale, Farnham, Surrey, GU10 1LZ |
| MORGAN, Colin RESIGNED | Director | | 06 Oct 2003 | | November 1956 | Bedgebury National Pinetum, Gouldhurst, Kent, TN17 2SL |
| NEWMAN, Eveleigh Earle Denis RESIGNED | Director | | 31 Oct 1996 | | August 1920 | Sion Cottage 1 Sion Road, Twickenham, Middlesex, TW1 3DR |
| SKINNER, Archie RESIGNED | Director | | 29 Sep 1997 | | October 1927 | 2 Frog Firle Cottages, Seaford Road Alfriston, Polegate, East Sussex |
| STUBBS, Michael William RESIGNED | Director | 10 Feb 1992 | 16 Oct 2001 | | April 1941 | Chequers Camden Park, Tunbridge Wells, Kent, TN2 5AD |