After a brief period in practice, in 2002 he was awarded a Rhodes Scholarship to undertake a DPhil at Oxford University with Professor Herman Waldmann FRS, receiving his DPhil in 2007. Dr Daley then joined Professor Chris Goodnow’s laboratory as a postdoctoral fellow. In 2013 he shared in the publication of a paper, in Journal of Experimental Medicine, which showed that self-reactive T cells are eliminated at two separate stages of development in the normal thymus.