The Society regrets to hear of the death of Mark Dunne, Professor of Physiological Sciences at the University of Manchester, UK. A degree in biochemistry from The University of Warwick, UK, led to a prolific career in biomedicine, where he focused most of his research on congenital hyperinsulinism, a genetic disorder where individuals produce abnormally high levels of insulin. Thanks to Dunne’s dedication to this field, he provided significant and valuable scientific support to the specialist congenital hyperinsulinism service at the Royal Manchester Children’s Hospital. Alongside his research, Dunne was The Society’s Meetings Secretary.