Charcoal burning pit?
The site consists of an inner bank running around two thirds of a moated island, a single earth bank on the South East side, and a double earth bank on the North West. The island is accessable from the North corner, but apparently traces of a causeway have been found in the Western corner.....although I couldn't find these remains!!!
These are by far the most impressive part of this site, and survive in places, to around a meter and a half high. There are definitely two rooms to the long house, with piles of slate rubble where the walls have otherwise collapsed. The remains of a charcoal burning pit have apparently been found in the area, although I was unable to track this feature down.