Headland Archaeology (UK) Ltd undertook a geophysical (magnetometer) survey covering approximately 12.5 hectares at three locations around the town of Mottram in Longdendale, Tameside, in support of the Trans-Pennine Upgrade. No anomalies of probable archaeological activity have been identified by the survey supporting the conclusions of the Arcadis Cultural Heritage Desk-based Assessment. Although numerous linear anomalies have been identified the majority reflect recent agricultural activity such as ploughing, drainage or hedgerow removal. Areas of magnetic disturbance locate infilled small-scale quarry pits or ponds. A large rectilinear anomaly locates a former building not recorded on historic mapping but likely to be of post-medieval or modern date based on its orientation. Parallel high magnitude linear responses locate the route of the Mottram Tunnel, part of the Longdendale Aqueduct, which was built in the mid-19th century to carry water to Manchester. On the basis of the geophysical survey the archaeological potential of Areas 3, 4 and 5 is assessed as low.