Radiocarbon dating of unaccompanied skeletons discovered during the excavation of an Iron Age, Roman and Saxon settlement at Yarnton, Oxfordshire, unexpectedly revealed the presence of a middle Iron Age cemetery (3rd or 4th century cal BC). British Iron Age burials before the 1st century BC are usually found as individuals, often in pits on settlement sites, or are repersented by disarticulated human bone. This paper explores whether cemeteries were a more common part of Iron Age burial practice than hitherto believed, or whether the Yarnton burials were a highly unusual and localized phenomenon? It highlights the merits of obtaining radiocarbon determinations on otherwise undated burials.