A detailed magnetometer survey was carried out by Archaeological Surveys Ltd over 2ha at Ruddle Court Farm, Newnham in Gloucestershire using a hand-pushed, cart-based system of 5 sensors spaced 0.5m apart. The results indicate the presence of several areas of very highly magnetic responses which could indicate former iron smelting. One is situated on the south western edge of the site and contains a number of strong responses in a linear formation with a zone of magnetic debris to the east. Further east is a widespread area of amorphous magnetic responses bounded by a linear feature. This zone does contain several strongly magnetic discrete anomalies but it is not clear if they relate to in-situ features or dumped or redeposited material. To the north east are two groups of strongly magnetic responses generally arranged in fragmented linear groups and associated with widespread magnetic debris. These linear groups containing strongly magnetic discrete responses that may also be indicative of former iron smelting. In the western part of the site, magnetic debris appears to be associated with former buildings mapped during the early 19th century.