This deliverable is the final report of the United Kingdom Storage Appraisal (UKSAP) project. UKSAP was initiated by the Energy Technologies Institute to provide a comprehensive, auditable and defensible estimate of UK CO2 storage capacity. This report summarises the background to the project, methodologies applied in order to estimate storage capacity, security of containment and economics.The report discusses results in terms of how understanding of the UK’s storage resource has been advanced, and what is still required in order to move the deployment of CCS forward