Professor Frier’s principal research interest is the pathophysiology of hypoglycaemia in humans with relevance to diabetes. He has published extensively in this field. An invited speaker on hypoglycaemia at many international meetings, he gave the Banting Memorial lecture at Diabetes UK in 2009 and the Camillo Golgi lecture at the 53rd annual EASD conference in 2017. In 2004 he received the Somogyi Award from the Hungarian Diabetes Association for his research on hypoglycaemia.