Born 19 December 1891, the second son of Frederick Herbert Raison, a schoolmaster, and Maud Chaplin, his wife. He was educated at King Edward's Grammar School, Nuneaton, and at Birmingham Medical School, and served as house surgeon in the Queen's Hospital to C A Leedham-Green, professor of surgery at Birmingham. As soon as he had qualified in 1914 he joined the RAMC in the first world war, and served at Salonika as major in charge of a surgical division. After the war he settled in practice at Birmingham and was appointed assistant surgeon to the General Hospital in 1928, becoming surgeon to the United Hospital on its formation. He was also surgeon to the Children's Hospital, and consulting surgeon to Nuneaton General and Infectious Diseases Hospital. He was for some years lecturer on operative surgery at Birmingham University. Raison volunteered for active service again in the RAMC on the outbreak of the second war in 1939, but was not accepted on account of his ill-health. He worked strenuously among the air-raid casualties at Birmingham during 1940-41 and operated regularly in the great under-ground emergency hospital. Raison married in 1923 Ceres Johnson, who survived him with a son and a daughter. Raison's health was broken by his wartime exertions and he died, after a long illness, in the Queen Elizabeth Hospital, Birmingham, on 8 May 1948, aged 56. He was buried at Llwyngwrill. He left £2,000 to endow a prize at Birmingham University in the surgical diseases of children. Raison had a staunch spirit in a slight frame, and was an excellent all-round surgeon, craftsman and teacher. He had a large practice at 58 Harborne Road.