We investigate the extent to which graduate returns vary according to the class of degree achieved by UK university students and examine changes over time in estimated degree class premia. Using a variety of complementary datasets for individuals born in Britain around 1970 and aged between 30 and 40, we estimate an hourly wage premium for a "good" (relative to a "lower") class of degree of 7% to 9%, implying a wide spread around the average graduate premium. We also estimate the premium for a good relative to a lower degree for different cohorts (those born between the mid-1960s and early-1980s) and find evidence that the premium for a good degree has risen over time as the proportions of cohorts participating in higher education have increased. Tables and a list of university types are appended.