DiUKcoast v1.0, is a new supranational dataset documenting four decades of coastal change across the United Kingdom (England, Scotland, Wales and Northern Ireland) including including the isle of Wight and Anglesey. This dataset has been produced using the publicly available optical Landsat-5,8 and Sentinel-2 missions over the period between 1984 to 2024 (40 years). It includes instantaneous waterlines and instantaneous tidally corrected to Mean Sea Level shorelines. DiUKcoast is made available to the public as free and open interactive data to support future coastal research and management across UK.