Blyth Offshore Demonstrator Ltd (BOD) have requested that Wessex Archaeology (WA) undertake a geoarchaeological assessment of geotechnical samples in support of Retained Archaeologist Services for the preconstruction and construction phases of the Blyth Offshore Demonstration Project (Figure 1). The Stage 1 geoarchaeological review (WA 2016), identified sequences of bedded, laminated, fine-grained and organic sediments of possible Holocene (or earlier) origin which have potential for understanding the timing and influence of marine transgression and determining the development of coastal geomorphology since the last glacial. These coastal environments are of particular archaeological interest; early prehistoric archaeology being framed by the flooding of Doggerland prior to 7000 BP (Bicket and Tizzard 2015). Following the Stage 1 review, a number of boreholes were identified as suitable for Stage 2 geoarchaeological assessment. Six samples from three of these boreholes were obtained, described and interpreted (BH-A2-9B-BH02, BH-A2-10B-BH02 and BH-A2-10B-BH04). The report in this series displays the geoarchaeological assessment results for the samples of interest; the locations of which are shown on Figure 1 of the report.