Detailed magnetometry was carried out within a 6ha field prior to a proposed residential development at Cholsey in Oxfordshire. The results indicate the presence of a number of rectilinear enclosures, trackways, linear ditches and pits of archaeological potential. The anomalies have a similar orientation to features previously located immediately to the south west and dated to the Bronze Age/early Iron Age, with some later Roman ditches. The site also contains a number of further positive linear and discrete anomalies which could relate to further cut features with archaeological potential; however, they are weak and cannot be confidently interpreted. An extant low linear bank crosses the south eastern part of the site and is associated with a very weak magnetic response. The southern part of the low bank appears to have been utilised as a headland for ridge and furrow cultivation.