Skipsea Castle based on Iron Age mound

theguardian.com/science/2016/oct/03/skipsea-castle-yorkshire-built-on-iron-age-mound

Jim Leary spoke more about this on the Today programme at 6.55
( bbc.co.uk/programmes/b07wn3rq ). His team took a core down through the mound to ascertain its age, as part of the ‘Round Mounds’ project. They’ve been looking at others and he’s got others in mind for the future...
more details at
roundmoundsproject.wordpress.com/