
The Friends' Ambulance Unit (FAU) was a volunteer ambulance service, founded by individual members of the British Religious Society of Friends (Quakers), in line with their Peace Testimony. The FAU operated from 1914–1919, 1939–1946 and 1946–1959 in 25 different countries around the world. It was independent of the Quakers' organisation and chiefly staffed by registered conscientious objectors.

Horace Gundry Alexander was an English Quaker teacher, writer, pacifist and ornithologist. He was the youngest of four sons of Joseph Gundry Alexander (1848–1918), two other sons being the ornithologists Wilfred Backhouse Alexander and Christopher James Alexander (1887–1917). He was a friend of Mahatma Gandhi.

Lawrence Wilfred "Laurie" Baker was a British-born Indian architect, renowned for his initiatives in cost-effective energy-efficient architecture and designs that maximized space, ventilation and light and maintained an uncluttered yet striking aesthetic sensibility. Influenced by Mahatma Gandhi and his own experiences in the remote Himalayas, he promoted the revival of regional building practices and use of local materials; and combined this with a design philosophy that emphasized a responsible and prudent use of resources and energy. He was a pioneer of sustainable architecture as well as organic architecture, incorporating in his designs even in the late 1960s, concepts such as rain-water harvesting, minimizing usage of energy-inefficient building materials, minimizing damage to the building site and seamlessly merging with the surroundings. Due to his social and humanitarian efforts to bring architecture and design to the common man, his honest use of materials, his belief in simplicity in design and in life, and his staunch Quaker belief in non-violence, he has been called the "Gandhi of architecture."

Patrick David Barr was an English actor. In his career spanning over half a century, he appeared in about 144 films and television series.

Walter Russell Brain, 1st Baron Brain was a British neurologist. He was principal author of the standard work of neurology, Brain's Diseases of the Nervous System, and longtime editor of the homonymous neurological medical journal titled Brain. He is also eponymised with "Brain's reflex", a reflex exhibited by humans when assuming the quadrupedian position.

Richard Bevan Braithwaite, usually cited as R. B. Braithwaite, was an English philosopher who specialized in the philosophy of science, ethics, and the philosophy of religion.

Dame Elizabeth Mary Cadbury was a British philanthropist and wife of George Cadbury, the chocolate manufacturer.

Eric Barry Wilfred Chappelow was a poet and a World War I era conscientious objector from England. His arrest and harsh treatment during four months imprisonment garnered support from prominent people including Chappelow's connections within the literary community. A campaign for his release was joined by Bertrand Russell, W. B. Yeats, and George Bernard Shaw. His arrest and the treatment were highlighted in the House of Commons by the Liberal MP Philip Morrell.

Stephen Pit Corder, generally known as Pit Corder, was a professor of applied linguistics at Edinburgh University, known for his contribution to the study of error analysis. He was the first Chair of the British Association for Applied Linguistics, 1967–70, and was instrumental in developing the field of applied linguistics in the United Kingdom.

Sir Kenneth William Cross FRCP was a British physiologist who was principally known for his fundamental contributions to the physiology of newborns that were so relevant to paediatric practice at the time.

Gerald Austin Gardiner, Baron Gardiner, was a British Labour politician, who served as Lord High Chancellor of Great Britain from 1964 to 1970 and during that time he introduced into British law as many reforms as any Lord Chancellor had done before or since. In that position he embarked on a great programme of reform, most importantly setting up the Law Commission in 1965.

Ruth Harrison OBE was a British animal welfare activist and writer.

William Fryer Harvey AM, known as W. F. Harvey, was an English writer of short stories, most notably in the macabre and horror genres. Among his best-known stories are "August Heat" and "The Beast with Five Fingers", described by horror historian Les Daniels as "minor masterpieces".

Lancelot Thomas Hogben FRS FRSE was a British experimental zoologist and medical statistician. He developed the African clawed frog (Xenopus laevis) as a model organism for biological research in his early career, attacked the eugenics movement in the middle of his career, and popularised books on science, mathematics and language in his later career.

Frank Raymond "F. R." Leavis was a British literary critic of the early-to-mid-twentieth century. He taught for much of his career at Downing College, Cambridge, and later at the University of York.

Christopher Richard Wynne Nevinson was an English figure and landscape painter, etcher and lithographer, who was one of the most famous war artists of World War I. He is often referred to by his initials C. R. W. Nevinson, and was also known as Richard.

Henry Woodd Nevinson was a British war correspondent during the Second Boer War and World War I, a campaigning journalist exposing slavery in western Africa, political commentator and suffragist.

Sir George Newman GBE, KCB FRSE was an English public health physician, Quaker, the first Chief Medical Officer to the Ministry of Health in England, and wrote a seminal treatise on the social problems causing infant mortality.

Philip John Noel-Baker, Baron Noel-Baker,, born Philip John Baker, was a British politician, diplomat, academic, amateur athlete, and renowned campaigner for disarmament. He carried the British team flag and won a silver medal for the 1500m at the 1920 Summer Olympics in Antwerp, and received the Nobel Peace Prize in 1959.

Cuthbert Wilfrid Francis Noyce was an English mountaineer and author. He was a member of the 1953 British Expedition that made the first ascent of Mount Everest.

Lionel Sharples Penrose, FRS was an English psychiatrist, medical geneticist, paediatrician, mathematician and chess theorist, who carried out pioneering work on the genetics of intellectual disability. Penrose was the Galton professor of eugenics (1945-1965), then professor of human genetics (1963–1965) at University College London, and later emeritus professor.

Sir Roland Algernon Penrose was an English artist, historian and poet. He was a major promoter and collector of modern art and an associate of the surrealists in the United Kingdom. During the Second World War he put his artistic skills to practical use as a teacher of camouflage.

Arthur Cecil Pigou was an English economist. As a teacher and builder of the School of Economics at the University of Cambridge, he trained and influenced many Cambridge economists who went on to take chairs of economics around the world. His work covered various fields of economics, particularly welfare economics, but also included Business cycle theory, unemployment, public finance, index numbers, and measurement of national output. His reputation was affected adversely by influential economic writers who used his work as the basis on which to define their own opposing views. He reluctantly served on several public committees, including the Cunliffe Committee and the 1919 Royal Commission on Income tax.

Lewis Fry Richardson, FRS was an English mathematician, physicist, meteorologist, psychologist and pacifist who pioneered modern mathematical techniques of weather forecasting, and the application of similar techniques to studying the causes of wars and how to prevent them. He is also noted for his pioneering work concerning fractals and a method for solving a system of linear equations known as modified Richardson iteration.

William Olaf Stapledon – known as Olaf Stapledon – was a British philosopher and author of science fiction. In 2014, he was inducted into the Science Fiction and Fantasy Hall of Fame.
Donald Ibrahím Swann was a Welsh-born composer, musician, singer and entertainer. He was one half of Flanders and Swann, writing and performing comic songs with Michael Flanders.

Richard Scurrah Wainwright was a Liberal MP for Colne Valley 1966–70, and February 1974–87.

Geoffrey Winthrop Young was a British climber, poet and educator, and author of several notable books on mountaineering.