Evaluation trenching and subsequent open area excavation were undertaken in advance of expansion at Lidsey Landfill in West Sussex. The fieldwork revealed predominantly prehistoric occupation with the Middle Bronze Age through to Middle Iron Age being the principal periods represented by clusters of pits and postholes followed by enclosures and small areas of fields. The area was overlain by a series of Roman field boundaries which commenced early in the Roman period but had gone out of use by later Roman times. Subsequent activity was only represented by a few sherds of early Saxon pottery, a medieval pit and post-medieval and modern field boundaries.