The paper ‘Evaluation of the ASSIGN open-source deterministic address-matching algorithm for allocating Unique Property Reference Numbers to general practitioner-recorded patient addresses’ has been selected by the HDR UK Impact Committee as having significant impact and clearly demonstrating the value of uniting the UK’s health data to make discoveries that improve people’s lives. The committee meets monthly to select research outputs put forward by research directors, researchers, and other members of the HDR UK community.