[1] There is a single bank and ditch, in roughly the shape of a square with rounded corners, enclosing an area of about 9 acres (3.6 ha).

[3] The enclosure contains three Bronze Age bowl barrows, aligned roughly north-south near the centre.

It was established that there was an earlier, slightly smaller enclosure: the eastern side of this survives as a low bank aligned north-south, with a filled-in ditch to its east, about 25 metres (27 yd) within the eastern rampart, the other sides of the earlier enclosure being beneath the later fort.

[1][3] The 1931 excavation also revealed postholes at the north-east side and east entrance, showing that the rampart was originally a box rampart, filled with rubble and reinforced with timbers, with a berm and a ditch beyond the outer timbers.

[2][3] Excavation of 1967–69 showed the remains of five round houses, of diameters 4.25–12.25 metres (14–40 ft), from the early 6th century BC, in the south-west corner.