This spreasheet includes data to support the Figures and Tables in: Title: Quantifying CPT cone factors in clays derived from weathered mudstone Journal: Quarterly Journal of Engineering Geology & Hydrogeology Authors: Dr Kevin M. Briggs, Dr Yuderka Trinidad Gonzalez, Prof. William Powrie, Mr Simon Butler, Mr Nick Sartain Column headings are based on: Electronic Transfer of Geotechnical and Geoenvironmental Data (AGS4, Edition 4.1, December 2020)