Iron Age

Several centuries passed before there was renewed activity on the site, but by the Middle Iron Age there were two enclosures there, each containing four-post structures. As well as burnt flint, fired clay and pottery, iron slag was found, suggesting that metal was being worked.
 
Crossing one of the Bronze Age enclosures were two parallel ditches, probably a droveway dating to the Late Iron Age. To the north of it a puzzling set of 9 post-holes laid out in a 3 x 3 grid, 3 m square is thought to have been a granary or other storage building with a floor raised off the ground.  

The 'four-post structures' within the Iron Age enclosure