Archaeological investigations, including trial trenching, excavation and monitoring, by Suffolk Archaeology CIC (SACIC) and Cotswold Archaeology (CA) from 2016 to 2019 of a 26ha site southwest of Mildenhall. Archaeological investigations recorded principal phases of late prehistoric and Early Anglo-Saxon occupation. A single high-status Anglo-Saxon burial (Grave 0404) of the mid 7th century AD was also found with grave goods including a hanging bowl, spear and shield. Isotope analysis of the male skeleton has suggested that the deceased was of local birth. The broadly contemporary buildings include both small post-built 'halls' and sunken-featured buildings (SFBs). The prehistoric occupation is dated by associated pottery and radiocarbon determinations to the Middle Iron Age (400 BC-100 BC). The evidence of settlement comprised over 120 pits in around a dozen pit clusters, as well as ditches that were the remains of farming enclosures. The mainly cylindrical pit features contribute to an ongoing debate about the nature of 'grain storage pits' and their disuse in the period: in keeping with other finds from across Britain, some of the pits are marked by final acts of 'structured' or 'special' deposition. They include two pits that contained adult human burials, another that had a complete horse, and one which provided a sheltered hollow for an oven. The enclosure ditches of the Iron Age settlement were located to take advantage of a large natural feature in the south of the site, a mired palaeochannel (2157) that had once been a tributary of the River Lark. Combined macrofossil plant, pollen, diatom and mollusc evidence, together with the geoarchaeological study of the channel's formation and silting-up processes, has allowed for the reconstruction of the farmed environment from the prehistoric to medieval periods. In addition, finds of coins, other artefacts, and animal and human remains within the channel fills suggest the possibility that further ritual activity was centred on this marshy 'wet' feature in the later Iron Age (100 BC-AD 43) and Early Roman period (AD 43-200). The excavations have indicated the site of another Iron Age settlement beside the River Lark and in the environs of Mildenhall. The many pits excavated have added evidence for ritual practice or 'special' deposits that contribute to ongoing debate about the function and disuse of so-called grain storage pits. The deposits included animal skulls, human burials and other remains, and...