A third structure lies at SC17636642. It is apparent as two unconnected curved banks, which have a strong stone content. The surviving lengths are 10m and 12m respectively and the walls stand 0.3m high and 2m wide. The curved walls suggest a classic longhouse-type structure.


It is possible that Burroo Ned was used as a look-out during the Norse and medieval period, as part of a watch-and-ward system of coastal defence, and the building may have been constructed for shelter for the militia undertaking these duties.