Detailed magnetometry was carried out over 35ha within 80 separate survey areas over the line of a gas main between Ilchester and Barrington, Somerset A geophysical survey was carried out over the route of a proposed gas pipeline between Ilchester and Barrington in Somerset. A total of 35ha was surveyed with magnetometry within 80 separate areas. Within these areas at least 20 have shown some evidence for magnetic anomalies that may be responses to cut features such as ditches and pits with an archaeological origin. Positive linear, rectilinear, curvilinear and discrete responses may relate to enclosures, land boundaries, ring ditches and pits. There is some evidence for continuation of features between several fields along the survey corridor. Evidence for former agricultural activity that is likely to include ridge and furrow agricultural systems has also been located.