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Sir Peter Brian Medawar was a British biologist and writer, whose works on graft rejection and the discovery of acquired immune tolerance have been fundamental to the medical practice of tissue and organ transplants. He studied at Marlborough College and Magdalen College, Oxford, and was professor of zoology at the University of Birmingham and University College London

Captain Cyril Diver was a civil servant and amateur naturalist. He became the first Director-General of the Nature Conservancy

Lawrence Alderson was the Founder, Scientific Consultant, Executive Director, Chairman and International Ambassador of the Rare Breeds Survival Trust between 1969 and 2012. He helped to establish national non-governmental organisations for endangered breeds in several counties, and was Founder President of Rare Breeds International in 1989