Large-scale excavation by M G O'Connell for SCC, Hall Aggregates (Thames Valley) Ltd, HBMC, and the Community Task Force. Neolithic cursus ditches recorded in detail in several places, also probably LBA field boundaries and large pits (7 wells), some with waterlogged wood remains. The supposed `henge', tentatively identified on aerial photographs, was found to be an ill-defined probably Saxon feature.