
Thomas Ford Chipp was an English botanist who became Assistant Director of the Royal Botanic Gardens, Kew. He played an important role in development of the study of ecology in the British Empire.

Sir Gordon Richard Conway is an agricultural ecologist and former President of the Rockefeller Foundation and the Royal Geographical Society. He is currently Professor of International Development at Imperial College, London and Director of Agriculture for Impact, a grant funded by the Bill & Melinda Gates Foundation, which focuses on European support of agricultural development in Africa.

Mike Dilger is an English ecologist, ornithologist, television presenter, and the wildlife reporter on the BBC television programme The One Show. He attended the University of Nottingham and UCNW Bangor in north Wales.

Alastair James Driver FCIEEM is an English ecologist and conservationist. He is an Honorary Professor of Applied Environmental Management at the University of Exeter and was the National Conservation Manager for the Environment Agency from 2002 to 2016. In January 2017 Driver was appointed as Director - England and Wales for Rewilding Britain. He is the creator and voluntary warden of Ali's Pond Local Nature Reserve in Sonning, Berks, which carries his name.

David William Goodall was an English-born Australian botanist and ecologist. He was influential in the early development of statistical methods in plant communities. He worked as researcher and professor in England, Australia, Ghana and the United States. He was editor-in-chief of the 30-volume Ecosystems of the World series of books, and author of over 100 publications. He was known as Australia's oldest working scientist, still editing ecology papers at age 103. Long an advocate of voluntary euthanasia legalisation, he ended his own life in Switzerland via physician-assisted suicide at age 104.

George Evelyn Hutchinson, was a British ecologist sometimes described as the "father of modern ecology." He contributed for more than sixty years to the fields of limnology, systems ecology, radiation ecology, entomology, genetics, biogeochemistry, a mathematical theory of population growth, art history, philosophy, religion, and anthropology. He worked on the passage of phosphorus through lakes, the chemistry and biology of lakes, the theory of interspecific competition, and on insect taxonomy and genetics, zoo-geography and African water bugs. He is known as one of the first to combine ecology with mathematics. He became an international expert on lakes and wrote the four-volume Treatise on Limnology in 1957.

David Lambert Lack FRS was a British evolutionary biologist who made contributions to ornithology, ecology, and ethology. His 1947 book, Darwin's Finches, on the finches of the Galapagos Islands was a landmark work as were his other popular science books on Life of the Robin and Swifts in a Tower. He developed what is now known as Lack's Principle which explained the evolution of avian clutch sizes in terms of individual selection as opposed to the competing contemporary idea that they had evolved for the benefit of species. His pioneering life-history studies of the living bird helped in changing the nature of ornithology from what was then a collection-oriented field. He was a longtime director of the Edward Grey Institute of Field Ornithology at the University of Oxford.

James Ephraim Lovelock, is an English independent scientist, environmentalist and futurist. He is best known for proposing the Gaia hypothesis, which postulates that the Earth functions as a self-regulating system.

Nahla Mahmoud is a Sudanese-born British writer, ex-Muslim, secularist, environmentalist, and human rights activist, and spokesperson for the Council of Ex-Muslims of Britain. She fled to the United Kingdom in 2010.

Dame Angela Ruth McLean is professor of mathematical biology in the Department of Zoology at the University of Oxford, and Chief Scientific Adviser to the Ministry of Defence.
David William Sims is a British marine biologist known for satellite tracking sharks and the Global Shark Movement Project. He is Senior Research Fellow at the Laboratory of the Marine Biological Association (MBA) in Plymouth, and a Professor of Marine Ecology in the National Oceanography Centre, Southampton at the University of Southampton, U.K.

Sir Reginald George Stapledon FRS was an English grassland scientist and pioneer environmentalist.

Sir Arthur George Tansley FLS, FRS was an English botanist and a pioneer in the science of ecology.

Hewett Cottrell Watson was a phrenologist, botanist and evolutionary theorist. He was born in Firbeck, near Rotherham, Yorkshire, and died at Thames Ditton, Surrey.

Gilbert White FRS was a "parson-naturalist", a pioneering English naturalist, ecologist and ornithologist. He is best known for his Natural History and Antiquities of Selborne.
Carrington Bonsor Williams FRS better known as C. B. Williams or just "C.B." to friends was an English entomologist and ecologist. His name is particularly associated with insect migration, statistical ecology and biogeography.