This dataset maps the risks of Phytophthora ramorum infection for 47587 fragments of Heather heathland (UKCEH Landcover Map class H9) and 74869 fragments of Heather grassland (UKCEH Landcover Map class H10). Fragment risk scores integrate climate suitability for P. ramorum (using pathogen-specific temperature-dependent growth curves and a relative humidity threshold), proximity to Larch/infected Larch within 500m or 5000m, proximity to other (non-Larch) wider environment infections within 1500m, habitat suitability within the fragment for sporulating hosts (Vaccinium myrtillus, V. vitis-idaea, Acrostaphylos uva-versi) and the reservoir host Rhododendron ponticum, proximity to inspected premises with confirmed infections and the presence of water courses. The maximum possible risk score for heathland fragments across all risk factors was 11.5, but in practice the maximum assigned for any fragment was 10.5 for Heather (H9) and 11 for Heather grassland (H10). Fragments were also classified as low, medium or high risk (overall_risk_as_range). Full details about this dataset can be found at https://doi.org/10.5285/00601c2a-ac86-467d-8696-689cf20e35d3
