This document provides guidance for good practice in the recovery, analysis and publication of organic residues from archaeological sites. It has been written for a range of archaeological professionals, including local authority archaeology officers, archaeological units and consultants, project managers, museum curators, conservators and pottery specialists, with the aim of ensuring that approaches are suitable, cost-effective and informative. These findings can also be viewed within the wider picture of the importance of marine resources at coastal or island locations throughout British prehistory. There has been much debate about the apparent 'abandonment' of aquatic resources in the Neolithic period in Britain, which is supported by extensive studies of organic residues from the Neolithic and later periods. It is only at Late Iron Age and Viking sites such as Bornais and Jarlshof that we start to see a significant re-appearance of marine resources in pots, several millennia after terrestrial resources became the key source of animal protein (Cramp et al 2015).