| PAN, Rachel ACTIVE | Secretary | 04 Mar 2020 | | | | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| BATCHELAR, Judith Margaret ACTIVE | Director | 28 Apr 2021 | | England | March 1959 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| BOTTERELL, Sandra Caroline ACTIVE | Director | 17 Mar 2016 | | England | July 1957 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| COOKE, Fay Margaret, Dr ACTIVE | Director | 19 Mar 2024 | | England | July 1982 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| DEVERELL, Richard George ACTIVE | Director | 18 Sep 2012 | | United Kingdom | December 1965 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| MAGDALENIC-MOUSSAVI, Vjera, Dr ACTIVE | Director | 26 Mar 2026 | | England | September 1976 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| MUNRO, Rebecca Jane ACTIVE | Director | 19 Mar 2024 | | England | November 1975 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| STONER, Fern Karen ACTIVE | Director | 01 Jul 2017 | | England | July 1972 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| THOW, Adam ACTIVE | Director | 02 Dec 2019 | | England | August 1974 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| BOWER, Rebecca Margaret RESIGNED | Secretary | 01 Apr 1993 | 19 Mar 2013 | | | 54 Ramillies Road, Chiswick, London, W4 1JN |
| FISHER, Miranda Katherine RESIGNED | Secretary | 19 Mar 2013 | 14 Apr 2015 | | | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| NORTH, Magda Amy RESIGNED | Secretary | 09 Sep 2015 | 11 Oct 2019 | | | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| HALLMARK SECRETARIES LIMITED RESIGNED | Nominee Secretary | 12 Mar 1993 | 01 Apr 1993 | | | 120 East Road, London, N1 6AA |
| AGIUS, Marcus Ambrose Paul RESIGNED | Director | 21 May 2010 | 25 Oct 2019 | United Kingdom | July 1946 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| BAUMAN, Robert Patten RESIGNED | Director | 20 Apr 1993 | 28 Jan 2002 | | March 1931 | 10 Alexander Square, London, SW3 2AY |
| BLACK, Moira Elizabeth RESIGNED | Director | 09 Nov 2000 | 05 Apr 2004 | England | April 1950 | 60 Beaufort Road, London, W5 3EA |
| BLAKENHAM, Michael John, Viscount RESIGNED | Director | 20 Apr 1993 | 05 Apr 2004 | United Kingdom | January 1938 | 1 St Leonards Studios, Smith Street, London, SW3 4EN |
| BOWER, Rebecca Margaret RESIGNED | Director | 01 Apr 1993 | 10 Jun 2002 | United Kingdom | January 1957 | 54 Ramillies Road, Chiswick, London, W4 1JN |
| BRADLEY, Denise RESIGNED | Director | 02 Apr 2004 | 01 Jun 2006 | | December 1958 | Suite 1, 56 Queen Anne Street, London, W1G 8LA |
| BURBIDGE, Robert Brinsley, Dr RESIGNED | Director | 20 Apr 1993 | 30 Sep 1994 | | December 1943 | 21 Devonhurst Place, Heathfield Terrace,Chiswick, London, W4 4JB |
| BURCHELL, Andrew Lindsay RESIGNED | Director | 28 Feb 2011 | 18 Sep 2012 | United Kingdom | May 1954 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| BURMAN, Tanya Kim RESIGNED | Director | 11 May 2006 | 28 Feb 2011 | United Kingdom | October 1961 | 14 Portland Terrace, Richmond, Surrey, TW9 1QQ |
| COLEY, Susan Gaynor RESIGNED | Director | 03 Dec 2013 | 30 Oct 2015 | England | July 1958 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| CRANE, Peter Robert, Prof Sir RESIGNED | Director | 04 Nov 1999 | 10 Jun 2002 | | July 1954 | 49 Kew Green, Richmond, Surrey, TW9 3AA |
| DOUGHTY, Jonathan Mark RESIGNED | Director | 20 Sep 2010 | 20 Sep 2017 | England | October 1962 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| DRORI, Jonathan Ilan RESIGNED | Director | 15 Mar 2007 | 31 Jul 2015 | England | November 1960 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| FARRAR, Adam RESIGNED | Director | 14 Dec 2016 | 26 Jun 2019 | England | December 1964 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| FLANNIGAN, Sarah Elisabeth RESIGNED | Director | 07 Oct 2019 | 01 Sep 2023 | England | December 1973 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| FLANNIGAN, Sarah Elisabeth RESIGNED | Director | 14 Dec 2016 | 20 Sep 2017 | England | December 1973 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| GOODING, Valerie Frances RESIGNED | Director | 10 Dec 2014 | 31 Mar 2021 | United Kingdom | May 1950 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| GREEN, Daniel Julian RESIGNED | Director | 18 Sep 2012 | 20 Sep 2017 | United Kingdom | January 1958 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| HAYMAN, Helene Valerie, Baroness RESIGNED | Director | 02 Apr 2004 | 21 Sep 2006 | | March 1949 | 12 Brookfield Park, London, NW5 1ER |
| HERBERT, Robin Arthur Elidyr RESIGNED | Director | 20 Apr 1993 | 13 Nov 1997 | Wales | March 1934 | The Neuadd, Llanbedr Road, Crickhowell, Powys, NP8 1SP |
| HOBHOUSE, William Arthur RESIGNED | Director | 20 Sep 2010 | 03 Feb 2015 | England | September 1956 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| HOPPER, Stephen, Professor RESIGNED | Director | 26 Feb 2008 | 18 Sep 2012 | United Kingdom | June 1951 | Royal Botanic Gardens, Kew Green, Richmond, Surrey, TW9 3AB |
| HUNTER, Meredith Pierce RESIGNED | Director | 01 Jul 2017 | 12 May 2023 | United Kingdom | September 1974 | Royal Botanic Gardens, Kew, Richmond, TW9 3AE, England |
| LAVIN, John Jeffrey RESIGNED | Director | 01 Apr 1993 | 10 Jun 2002 | | September 1953 | 7 Prospect Crescent, Twickenham, Middlesex, TW2 7EB |
| MARKS, Jonathan RESIGNED | Director | 28 Feb 2011 | 29 Feb 2016 | England | July 1973 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| MCFARLANE, Angela Elizabeth RESIGNED | Director | 17 Aug 2011 | 17 Sep 2013 | United Kingdom | December 1957 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| MCLAUGHLIN, Gillian Margaret RESIGNED | Director | 03 Dec 2013 | 01 Jul 2017 | England | July 1957 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| OAG, Iain Davie Mackenzie RESIGNED | Director | 02 Mar 1999 | 21 Nov 2004 | | July 1951 | Brook Cottage 17 Main Street, Low Bentham, Lancaster, LA2 7BX |
| PRANCE, Ghillean Tolmie, Sir RESIGNED | Director | 16 May 1996 | 13 Aug 1999 | England | July 1937 | The Old Vicarage, Silver Street, Lyme Regis, Dorset, DT7 3HS |
| SELBOURNE, John Roundell, The Earl Of RESIGNED | Director | 02 Apr 2004 | 12 Oct 2009 | | March 1940 | Temple Manor, Selbourne, Acton, Hampshire, CV34 3LR |
| SIMMONDS, Monique Sheelagh Jacquard, Professor RESIGNED | Director | 18 Sep 2012 | 20 Sep 2017 | United Kingdom | February 1950 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| SWEENEY, Antony Gerard RESIGNED | Director | 10 Dec 2015 | 20 Sep 2017 | England | September 1955 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| VYVYAN, Ralph Ferrers Alexander, Sir RESIGNED | Director | 10 Dec 2014 | 29 May 2015 | England | August 1960 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| WALTON, Christine Helen RESIGNED | Director | 08 Jan 1996 | 31 Mar 2000 | England | May 1954 | Penpoll, West Harting, Petersfield, Hampshire, GU31 5PA |
| WATEROUS, Johanna Elizabeth Martin RESIGNED | Director | 26 Feb 2008 | 13 Feb 2019 | England | September 1957 | Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB |
| HALLMARK REGISTRARS LIMITED RESIGNED | Nominee Director | 12 Mar 1993 | 01 Apr 1993 | | | 120 East Road, London, N1 6AA |