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  1. Limestone Distribution of Britain - Show Caves of the World

  2. BGS Geology Viewer - British Geological Survey

  3. Principal aquifers in England and Wales | Aquifer, shale and clay maps

  4. Principal aquifers in England and Wales | Aquifer, shale and clay maps

  5. Digital Geological Map Data of Great Britain - data.gov.uk

  6. Aquifer designation data - British Geological Survey

  7. Upland limestone landscapes Upland limestone - BBC

  8. OS Ten Mile Planning Maps. Sheet 1 - Limestone Maps - Map

  9. Upland limestone landscapes Upland limestone - OS map work

  10. Aquifer Designation Dataset for England and Wales - data.gov.uk