In the summer of 1978 pottery and flintwork were noticed in the sections to the south of Cliffe Village during the laying of a pipeline by British Gas (TQ 734744) (fig. 1). This led to the excavation of a series of small trial trenches by Mr David Thomson with the help of local volunteers in the same year. The retrieval of a Beaker and Collared Urn suggested an early Bronze Age site, and excavations by Dr Ian Kinnes for the British Museum were done in September 1979. Although the excavated features contained mainly Iron Age pottery and metalwork, both seasons' work also produced a large quantity of flint artefacts ranging from Mesolithic to Bronze Age in date. The following report is an analysis of the Mesolithic tranchet axe manufacturing debitage which could be distinguished as a discrete group from the other flintwork. It is not intended to present a comprehensive flint report for Cliffe, but to provide a framework for analysis at other sites where tranchet axe production has been shown to take place (Wymer 1962; Parfitt and Halliwell 1982).