Born in Worcester, England, Hamblin's early years were spent in Aldershot in Hampshire where he and his family lived on Cambridge Road; he was educated at Farnborough Grammar School (1954–1961)[1] and the University of Bristol.
He pursued a research career in haematology and immunology, successively becoming an expert in plasma exchange, stem cell transplantation, monoclonal antibody therapy, myelodysplastic syndrome and chronic lymphocytic leukaemia.
[2] His most important research discovery was that chronic lymphocytic leukaemia comes in two forms, depending on whether the immunoglobulin heavy chain variable region genes contain somatic mutations.
[citation needed] Hamblin presented the BBC 2 episode 'Of Mice and Men' (1998) in its Counterblast series, in which he argued for the use of animals in medical research.
He claimed in a 1981 BMJ paper that the belief in spinach having a high iron content was due to a decimal point error that was discovered in the 1930s;[4] Mike Sutton published an article in 2010 questioning Hamblin's story.