Archaeological excavations in advance of the construction of the new A43 dual carriageway between Towcester and the M40, in both Northamptonshire and Oxfordshire, were carried out by Northamptonshire Archaeology in 2000 and 2001 in accordance with Highways Agency requirements. Excavations were undertaken on five settlement sites four dating to the Iron Age/early Roman period, and one to the Roman period. Three of the Iron Age sites, each of a different form, lay within 500m of each other south of Towcester. There were also investigations on a smaller scale on sites principally of the Iron Age...