James William Douglas Bull, the son of a general practitioner in Buckinghamshire, was educated at Repton and at Gonville and Caius College, Cambridge, before securing an entrance scholarship to St George's Hospital Medical School and graduating there in 1936. One of his uncles was a radiologist and

Born at Pontefract on 12 September 1904, the son of a general practitioner, George Blomfield was educated at Malvern and Trinity College, Cambridge, where he graduated with first-class honours in the mechanical sciences tripos. Despite his gift for mathematics and mechanical science he was, after