The ?Scientific Dates for Field Systems in England? project was completed during 2015-16 in a partnership between Historic England, the University of Sheffield and ArcHeritage, a commercial archaeological consultancy. The project?s aims were to: (a) produce a collated list of relevant scientific dates for field systems in England; (b) provide a constructive critique of fieldscape chronologies based on collated scientific dates; (c) recommend methodological enhancements and future research that arise from the project?s results. The project assessed the current understanding of the chronology of field systems of all periods in England. The focus of the work was on reviewing known dates for the activity of enclosure for agricultural purposes and aimed to review existing dates for fields of all periods drawn from published and unpublished sources. The project recorded 393 scientific dates from 120 excavated sites (?site? refers to the archaeologically investigated area, however large or small) using information from unpublished and published sources. The project?s database structure, comprising three related tables and their constituent fields. A table of bibliographical references is also provided. 1. Site table: Site UID Site name County NGR Easting & Northing Latitude & Longitude Date of intervention Monument type(s) x 2 (based on Historic England?s Monuments Thesaurus) Archaeological period(s) x 2 (based on Historic England?s periodisation) Short reference Site summary SMR/HER monument or event no. 2. Radiocarbon date table: Date UID Site UID Laboratory code and unique sample number Project sample reference Type of material dated [defined list] Description of material Description of context Objective for dating sample 14C age 14C error ë -13C( per cent) Measurement type [AMS/radiometric] Calibrated date [to 2 sigma, 95 per cent confidence] Comment/interpretation 3. OSL date table: Date UID Site UID Laboratory code and unique sample number Project's sample no Description of context Objective for dating sample De measurement and error Total dose rate Luminescence age Age error Calendar date Date of measurement Comment/interpretation