Under a large mound of worked timbers at BC 5, archaeologists discovered large areas of burnt clay, burnt flint and charcoal, which has been interpreted as the floor of a living space. Other timbers show signs of having been extensively worked on. Some split oak suggests that particularly large structures, or possibly boats, were being constructed at the site. Another timber shows signs of having been fashioned as a type of conduit, which is not something that has ever been seen in Mesolithic archaeology before. Some of the worked timbers indicate technological skills that had previously only been associated with the Neolithic era, 2000 years later than Bouldnor.