[2] Hubble was principally notable for research into paediatric endocrinology and publishing a number of papers on the subject, which gave him a national reputation.
He developed an interest in paediatric endocrinology, and gained a national reputation for his expertise after publishing numerous articles in the field.
He worked simultaneously as a general practitioner and a specialist paediatrician until 1942, when he was appointed as a physician to the Derbyshire Royal Infirmary and Derby City Hospital.
He later joined the University of Birmingham Medical School in 1958 as the chair of paediatrics, and worked principally on the development of the Institute of Child Health.
[2] He was awarded the James Spence Medal, the highest honour of the Royal College of Paediatrics and Child Health, in 1970;[3] he also received the British Medical Association's Dawson Williams Prize.