Iron Age and medieval defended promontory. A massive bank and ditch forms the defences of this promontory fort. On the southern side a natural gully leading from the sea was enhanced and then extended to form a deep, semi-circular ditch protecting the promontory on the landward side. Material from the ditch was used to construct an earthen rampart, the inner face of which retained by a stone wall.


Excavation showed that the first phase of the defences were constructed during the early Iron Age, but this had fallen into disrepair when it was replaced in a second phase of activity during the late Iron Age, the remains of which can be seen today. The earlier defences were enlarged, the ditch being excavated to a depth of around 3m and the rampart widened to about 3.5m. The investigations also found four stone roundhouses with paved floors and central hearths, which were occupied until 100 AD. A range of personal items was recovered, including a bone comb, a bronze brooch, glass beads and a fragment of a black jet ring and bracelet, as well as weaving and sewing tools.


The promontory fort then fell out of use until the Viking Age, when a rectangular building 12.5m by 5m was constructed. A narrow stone bench against the south wall would have served for sitting and sleeping. No evidence of a hearth was found, implying that the structure was not permanently occupied. The limited evidence for domestic use, coupled with the lack of a hearth, has led to the suggestion that the building served men undertaking watch and ward duties along this stretch of coastline.