In 1085 Sweyn's son, now Canute IV of Denmark, planned a major invasion of England but the assembled fleet never sailed. No further serious Danish invasions of England occurred after this. Although, some raiding occurred during the troubles of Stephen's reign, when King Eystein II of Norway took advantage of the civil war to plunder the east coast of England, sacking Hartlepool and Whitby in 1152, as well as raiding the Yorkshire coast. However, the intention was raids not conquest, and their conclusion marked the end of the Viking Age in England.