This rapid PRA shows: A single outbreak of hazelnut blight has been recorded in the UK from 1976. The absence of further disease reports suggests Xac has limited potential to establish and cause disease in UK climatic conditions. Measures contained within EU Marketing Directives reduce entry risks for Xac though it is possible that the pathogen could be imported through asymptomatically infected plants for planting. Growers should be alert to the possibility of Xac infection and adopt high standards of phytosanitary management that will reduce disease impacts.