 His interests include the origin of the masses of particles and the Higgs boson.Cashmore was educated at Dudley Boys Grammar School, St John's College, Cambridge (BA 1965, MA), Balliol College, Oxford, and University College, Oxford (DPhil 1969, Weir Junior Research Fellow, 1851 Research Fellow).His doctoral thesis was entitled "A study of inelastic pion-proton interactions in the range 600–800 MeV/c".