| DAWSON, Martin ACTIVE | Secretary | 16 Mar 2023 | | | | Slimbridge, Gloucester, GL2 7BT |
| BEER, Andrew David ACTIVE | Director | 05 Oct 2017 | | United Kingdom | November 1968 | Slimbridge, Gloucester, GL2 7BT |
| BRIGGS, Barnaby Daniel ACTIVE | Director | 13 Dec 2011 | | England | April 1964 | Slimbridge, Gloucester, GL2 7BT |
| DUNN, Christian Philip, Professor ACTIVE | Director | 27 Feb 2025 | | United Kingdom | March 1981 | Slimbridge, Gloucester, GL2 7BT |
| FLINT, Richard Mark Russell ACTIVE | Director | 27 Feb 2025 | | Netherlands | July 1970 | Slimbridge, Gloucester, GL2 7BT |
| LAW, Alan Bahadur ACTIVE | Director | 12 Dec 2019 | | United Kingdom | December 1964 | Slimbridge, Gloucester, GL2 7BT |
| MAWER, Alexander Daniel ACTIVE | Director | 12 Dec 2019 | | England | June 1973 | Slimbridge, Gloucester, GL2 7BT |
| MONTGOMERY, Fraser Stewart ACTIVE | Director | 25 Nov 2021 | | England | May 1970 | Slimbridge, Gloucester, GL2 7BT |
| PEARSON, Sarah Anne ACTIVE | Director | 25 Nov 2021 | | United Kingdom | January 1980 | Slimbridge, Gloucester, GL2 7BT |
| WILSON, Philip Charles ACTIVE | Director | 17 Nov 2022 | | England | October 1955 | Slimbridge, Gloucester, GL2 7BT |
| DAW, Michael Garry RESIGNED | Secretary | 07 Oct 2004 | 15 Aug 2005 | | | 17 Davallia Drive, Up Hatherley, Cheltenham, Gloucestershire, GL51 3XG |
| LEED, Stuart Douglas RESIGNED | Secretary | 01 Apr 2014 | 28 Jan 2015 | | | Slimbridge, Gloucester, GL2 7BT |
| LEED, Stuart Douglas RESIGNED | Secretary | 23 Jun 2011 | 13 Dec 2012 | | | Slimbridge, Gloucester, GL2 7BT |
| REW, John Leslie RESIGNED | Secretary | 19 Jul 2018 | 03 Mar 2023 | | | Slimbridge, Gloucester, GL2 7BT |
| ROBSHAW, Terence Ian RESIGNED | Secretary | 16 Dec 1993 | 07 Oct 2004 | | | Applegarth Bosbury Road, Cradley, Malvern, Worcestershire, WR13 5LT |
| SPENCER, Elizabeth Nicola RESIGNED | Secretary | 28 Jan 2015 | 25 May 2018 | | | Slimbridge, Gloucester, GL2 7BT |
| SPENCER, Elizabeth Nicola RESIGNED | Secretary | 13 Dec 2012 | 01 Apr 2014 | | | Slimbridge, Gloucester, GL2 7BT |
| SPENCER, Elizabeth Nicola RESIGNED | Secretary | 16 Aug 2005 | 23 Jun 2011 | | | 22 Worley Ridge, Nailsworth, Gloucestershire, GL6 0DP |
| AGOSTON, Robyn RESIGNED | Director | 27 Feb 2025 | 09 Mar 2026 | Switzerland | October 1981 | Slimbridge, Gloucester, GL2 7BT |
| BAINES, John Christopher, Professor RESIGNED | Director | 30 Mar 1994 | 20 Jun 1996 | United Kingdom | May 1947 | 28 Park Dale West, Wolverhampton, West Midlands, WV1 4TE |
| BIRCH, Martin Philip RESIGNED | Director | 01 Oct 2015 | 17 Nov 2022 | England | June 1965 | Slimbridge, Gloucester, GL2 7BT |
| BOULTON, Mark Noy RESIGNED | Director | 20 Jun 1996 | 20 Jun 2002 | | November 1937 | Brocklebank Butts Lane, Woodmancote, Cheltenham, Gloucestershire, GL52 4QH |
| BROWN, Andrew Edward, Dr RESIGNED | Director | 01 Jan 2008 | 01 Oct 2015 | England | May 1954 | Sunny, Bank Farm, Carperby, Leyburn, North Yorkshire, DL8 4DR |
| CARRAGHER, Anna RESIGNED | Director | 17 Jun 2009 | 11 Oct 2018 | Northern Ireland | July 1948 | 24 College Park Avenue, Belfast, BT7 1LR |
| CASTLE, Pamela Margaret RESIGNED | Director | 01 Oct 2015 | 04 May 2020 | England | September 1941 | Slimbridge, Gloucester, GL2 7BT |
| DAY, Peter Donal RESIGNED | Director | 25 Jun 2008 | 19 Jul 2020 | United Kingdom | February 1944 | 10 Clifton Road, Amersham, Buckinghamshire, HP6 5PU |
| DEARDEN, Michael Bailey RESIGNED | Director | 16 Jun 2010 | 12 Dec 2011 | United Kingdom | September 1942 | Slimbridge, Gloucester, GL2 7BT |
| DOWN, Ashley Gordon RESIGNED | Director | 30 Mar 1994 | 20 Jun 1996 | | November 1938 | 12a Digby Mansions, Hammersmith Bridge Road, London, W6 9DE |
| DRIVER, Alastair, Professor RESIGNED | Director | 01 Dec 2011 | 26 Nov 2020 | United Kingdom | October 1956 | Wisteria, Garde Road, Sonning, Reading, RG4 6XJ, United Kingdom |
| DUNCAN, Philip Marshall RESIGNED | Director | 01 Dec 2011 | 01 Oct 2015 | United Kingdom | March 1940 | 9, The Green, Aldbourne, Marlborough, Wiltshire, SN8 2BW, United Kingdom |
| FERNIE, William Mackinnson RESIGNED | Director | 30 Jun 2005 | 17 Jun 2009 | | March 1931 | Manor Farm, Tellisford, Bath, Avon, BA2 7RL |
| FERNIE, William Mackinnson RESIGNED | Director | 21 Jun 1997 | 05 Jun 2003 | | March 1931 | Manor Farm, Tellisford, Bath, Avon, BA2 7RL |
| FOX, Anthony David, Professor RESIGNED | Director | 10 Jun 2000 | 15 Jun 2006 | | August 1956 | Ramtenvej 54, Dk-8581 Nimtofte, Denmark |
| FRY, Graham Holbrook, Sir RESIGNED | Director | 17 Jun 2009 | 06 Oct 2016 | England | December 1949 | Old Farm Cottage, Staploe, St. Neots, Cambs, PE19 5JA |
| GALSWORTHY, Anthony Charles, Sir RESIGNED | Director | 05 Jun 2003 | 17 Jun 2009 | United Kingdom | December 1944 | 11 Church Path, Merton Park, London, SW19 3HJ |
| GASKELL, Richard Kennedy Harvey, Sir RESIGNED | Director | 16 Dec 1993 | 30 Mar 1994 | | September 1936 | Grove Farm Grove Lane, Yatton Keynell, Chippenham, Wiltshire, SN14 7BS |
| HARVEY-JONES, John Henry, Sir RESIGNED | Director | 16 Dec 1993 | 09 Jun 1994 | | April 1924 | Rudhall Manor, Rudhall, Ross On Wye, Herefordshire, HR9 7TL |
| HENZELL-THOMAS, Simon RESIGNED | Director | 05 Oct 2017 | 04 Oct 2019 | Netherlands | October 1977 | Slimbridge, Gloucester, GL2 7BT |
| HOLBAN, Luminita RESIGNED | Director | 25 Nov 2021 | 21 Nov 2024 | England | March 1976 | Slimbridge, Gloucester, GL2 7BT |
| JONES, Leslie David RESIGNED | Director | 30 Jun 2005 | 01 Oct 2015 | United Kingdom | January 1946 | The Clock House, 231 Kentwood Hill Tilehurst, Reading, Berkshire, RG31 6JD |
| KEAR, Janet, Doctor RESIGNED | Director | 07 Dec 2000 | 24 Nov 2004 | | January 1933 | Jewells Lodge Cottage, Umberleigh, Devon, EX37 9EY |
| LIAKOS, Hester RESIGNED | Director | 12 Dec 2019 | 12 Oct 2023 | England | January 1976 | Church View, High Halden, Ashford, TN26 3JB, England |
| LUCAS, Grenville Llewellyn RESIGNED | Director | 17 Jun 1999 | 16 Mar 2002 | | December 1935 | 3 Hornchurch Close, Kingston Upon Thames, Surrey, KT2 5GH |
| MACDONALD, David, Professor RESIGNED | Director | 30 Jun 2005 | 22 Jul 2010 | United Kingdom | September 1951 | Bankfield Lodge, Stand Lake, Oxfordshire, OX29 7QB |
| MALLINSON, Jeremy John Crosby RESIGNED | Director | 08 Jun 1995 | 21 Jun 2001 | | March 1937 | Jersey Wildlife Preservation Trust, Les Augres Manor Trinity, Jersey, Channel Islands, JE3 5BP |
| MELLOR, Hugh Salisbury RESIGNED | Director | 07 Dec 1995 | 20 Jun 2002 | United Kingdom | March 1936 | Blackland Farm, Stewkley, Leighton Buzzard, Bedfordshire, LU7 0EU |
| MILNE, David Calder RESIGNED | Director | 11 Dec 2008 | 01 Dec 2011 | United Kingdom | September 1945 | 56, Woodstock Road, Chiswick, London, W4 1EQ |
| MILNE, David RESIGNED | Director | 04 Oct 2001 | 25 Jun 2008 | | September 1945 | 16 Bedford Row, London, WC1R 4EB |
| MOSER, Michael RESIGNED | Director | 30 Mar 1994 | 20 Jun 1996 | | July 1956 | Iwrb, Slimbridge, Gloucestershsire, GL2 7BX |
| NEWTON, Ian RESIGNED | Director | 21 Jun 1997 | 10 Jun 2000 | | January 1940 | Treetops Salts Road, West Walton, Wisbech, Cambridgeshire, PE14 7ED |
| NEWTON, Ian RESIGNED | Director | 30 Mar 1994 | 08 Jun 1995 | | January 1940 | Treetops Salts Road, West Walton, Wisbech, Cambridgeshire, PE14 7ED |
| OLIVER, Peter James RESIGNED | Director | 20 Jun 1996 | 31 Aug 1999 | England | July 1939 | The Briar Patch, Limpsfield Chart, Oxted, Surrey, RH8 0TL |
| PACKHAM, Chris RESIGNED | Director | 06 Dec 2001 | 22 Jan 2005 | | May 1961 | Badgers Brook, Hound Road, Netley Abbey, Southampton, Hampshire, SO31 5FZ |
| PERRINS, Christopher Miles RESIGNED | Director | 08 Jun 1995 | 21 Jun 2001 | | May 1935 | 46 Cumnor Hill, Oxford, Oxfordshire, OX2 9HB |
| POLLOCK, Stephen Thoms RESIGNED | Director | 09 Jun 1994 | 10 Jun 2000 | | June 1953 | 8 Roundwood Park, Harpenden, Hertfordshire, AL5 3AB |
| PRIEST, Nicholas RESIGNED | Director | 06 Apr 2000 | 15 Jun 2006 | England | August 1961 | Ashmead House, Ashmead Green, Dursley, Gloucestershire, GL11 5EN |
| QUARRY, Adam Philip St John RESIGNED | Director | 05 Dec 1996 | 20 Jun 2002 | | August 1955 | Glebe Cottage, Froxfield, Petersfield, Hampshire, GU32 1EG |
| RUSSELL, George, Sir RESIGNED | Director | 01 Dec 2011 | 05 Mar 2015 | United Kingdom | October 1935 | Slimbridge, Gloucester, GL2 7BT |
| RUSSELL, George, Sir RESIGNED | Director | 11 Jul 2002 | 25 Jun 2008 | United Kingdom | October 1935 | 46 Downshire Hill, Hampstead, London, NW3 1NX |
| SCOTT, Dafila RESIGNED | Director | 21 Jun 1997 | 05 Jun 2003 | | June 1952 | White Roses, The Hythe, Reach, Cambridgeshsire, CB5 0JQ |
| SCOTT, Dafila RESIGNED | Director | 30 Mar 1994 | 20 Jun 1996 | | June 1952 | White Roses, The Hythe, Reach, Cambridgeshsire, CB5 0JQ |
| SCOTT, Philippa, Lady RESIGNED | Director | 30 Mar 1994 | 05 Jan 2010 | United Kingdom | November 1918 | Newgrounds, Slimbridge, Gloucestershire, GL2 7BT |
| SPRAY, Christopher James, Professor RESIGNED | Director | 05 Jun 2003 | 17 Jun 2009 | Scotland | July 1953 | 8 Ledcameroch Gardens, Dunblane, Perthshire, FK15 0GZ |
| TEACHER, Anthony James Moreton RESIGNED | Director | 30 Mar 1994 | 08 Jun 1995 | | August 1937 | Hadlow Place, Tonbridge, Kent, TN11 0BW |
| THOMAS, Anthony David RESIGNED | Director | 07 Dec 2000 | 01 Dec 2011 | England | October 1943 | Slimbridge, Gloucester, GL2 7BT |
| TONGE, Simon Jonathan RESIGNED | Director | 25 Jun 2008 | 17 Nov 2022 | United Kingdom | November 1958 | 3 North Rocks Road, Churston Ferrers, Paignton, Devon, TQ4 6LF |
| TUDOR, David Thomas RESIGNED | Director | 25 Nov 2021 | 24 Mar 2026 | England | May 1972 | Slimbridge, Gloucester, GL2 7BT |
| VAN OSS, Richard Mark RESIGNED | Director | 30 Mar 1994 | 21 Jun 1997 | | March 1931 | Glebe Cottage Parsonage Street, Fontmell Magna, Shaftesbury, Dorset, SP7 0PB |
| WALKDEN, Paul RESIGNED | Director | 30 Mar 1994 | 08 Jun 1995 | | November 1952 | 32 Oakfield Way, Sharpness, Berkeley, Gloucestershire, GL13 9UU |
| WILKINSON, William Henry Nairn, Sir RESIGNED | Director | 30 Mar 1994 | 12 Apr 1996 | | July 1932 | 119 Castelnau, Barnes, London, SW13 9EL |
| WILLIAMS, Max, Sir RESIGNED | Director | 08 Jun 1995 | 20 Jun 1996 | | February 1926 | Orinda, Holly Lane, Harpenden, Hertfordshire, AL5 5DY |
| WORCESTER, Robert Milton, Sir RESIGNED | Director | 20 Jun 2002 | 25 Jun 2008 | United Kingdom | December 1933 | Allington Castle, Allington, Maidstone, Kent, ME16 0NB |