'Eggs, legs and Grimsby' - Viking words we still use
The influence of the Vikings who came to Britain can still be heard more than 1,000 years later in the English language.
They didn't just loot and leave, at the end of the 9th Century there were large settlements of Scandinavians throughout the country.
Dr Richard Dance, of Cambridge University, tells Neil Oliver the words and places whose origins can be traced back to the Vikings.
Vikings is broadcast on BBC Two on 11 September at 21:00 BST.
BBC History: Find out more about the Vikings' legacy