This study looks at data relating to a sample of offenders convicted of online child sexual exploitation offences. It aims to discover if and how online forms of child sexual exploitation and offline child sexual exploitation are linked. The majority of offenders included in this study committed only online offences, although in a small number of cases there was a correlation between exploitative material, grooming and contact offending. This work is an important first step in understanding the nature of online child exploitation and how it relates to other forms of abuse.