A magnetometer survey was undertaken across, and to the south of, the trapezoidal enclosure (defined by aerial photography) at Gosbecks Farm.<1><2><3> The instrument generally used was the FM18 Fluxgate Gradiometer. Survey squares of side 20m were set out. For most of the survey the tracks were 1m apart and all walked in the south to north direction, taking readings every 0.25m. For the survey of the south west corner of the trapezium the operator walked zigzag in the south/north/south direction along tracks 0.5m apart, taking readings every 0.25m. The survey clearly identified the enclosure and many other linear features that suggest ditched enclosures, together with pit-like features.