Two seasons of excavation (1975 and 1977) by F.H. Thompson for the Society of Antiquaries and SyAS concentrated on the defences and a number of anomalies indicated by gradiometer survey by A.J. Clark. The defences consisted of a single stone-faced rampart and a V-shaped ditch, possibly right round the promontory. The primary ditch silt on the south-east side was sampled for Mr Clark's sediment dating programme. The fort's entrance was through two out-turned stone-revetted banks; a recess in each guarded the front of a post-hole setting for a front gate some 6 metres wide, and there was also a rear gate position. In the interior some of the anomalies proved to be large pits; one which contained carbonized grain may have been a dwelling. Other features included a hearth, possibly two others, and probable quarry pits for the revetment. Finds included Late Iron Age pottery, 3 Class I Potin coins (first half first century BC), bee-hive quern fragments, and sling stones. (124 and 142; report in Antiquaries Journal 59)