The Vikings of the north can strike at any moment. They are bloodthirsty pagans and have no care for Christian beliefs – even the religious sanctity of Iona is under threat.

Evidence of Viking warfare in the Western Isles. Iron axehead, from a Viking grave at Ballinaby on Islay, Inner Hebrides.

Site of the early Gaelic Christian centre. Iona Abbey, Iona, restored in the 20th century.