The lack of appraisal of CO2 storage sites is considered a key hurdle to progressing CCS in the UK.This project will screen, select and progress appraisal of 5 CO2 stores applying international best practice.Screening will use CO2Stored and public domain sources.Selection and Appraisal will use the PGS Megamerge seismic data plus seismic and well data from CDA, augmented as necessary.