Evans was educated at the University of Birmingham, University College London and University College Hospital. From 1916 to 1918 he was in the Royal Army Medical Corps. He moved on to become Professor of Experimental Physiology in Leeds, 1918-1919. He joined the National Institute for Medical Research, 1919-1922. From 1922 to 1926 he was Professor of Physiology at St Bartholomew's Medical College, and from 1926 to 1949 he was Jodrell Professor of Physiology at University College London. He did national service from 1939 to 1944. Evans became Emeritus Professor of Physiology at the University of London in 1949. He was also a Consultant at the War Office from 1959. From 1946 to 1948 Evans was a member of the Council and Vice-President of the Royal Society. He was also Chairman of the Military Personnel Research Committee, War Office, 1948-1953. He was knighted in 1951. He published a couple of books on physiology and some papers on physiology and biochemistry. He died on 29 August 1968.
From the guide to the Evans Notebooks, 1903-1947, (University College London)
