The third stage of archaeological excavation has been completed at Broom Quarry on behalf of Tarmac Quarry Products (Central) Ltd. The assessment area comprised 22.5 hectares. The excavations were conducted by a team from the Cambridge Archaeological Unit in October/ November of 1998. Unlike previous phases where the excavations could be centred on known areas of activity (as recognised from aerial photography and / or previous trial trenching) the current phase of fieldwork had a single objective: to prospect for unknown sites and / or activity areas by using systematic trenching.