20221115 15491500 1.0 TRUE SWF 1 in 100 year #https://data.gov.uk/dataset/1f3d6e13-40f1-4d12-99de-77132bc19c47/risk-of-flooding-from-surface-water-extent-0-1-percent-annual-chance# Centre for Ecology & Hydrology NERC (CEH). Defra, Met Office and DARD Rivers Agency. Cranfield University. James Hutton Institute.