Original sentence: Genetic studies in the islands of Britain and Ireland of the Y-DNA Haplogroup R1a1, seen also across Scandinavia, have demonstrated that the Vikings settled in Britain and Ireland as well as raiding there
Edited sentence: Genetic studies in the British Isles of the Y-DNA Haplogroup R1a1, seen also across Scandinavia, have demonstrated that the Vikings settled in the British Isles as well as raiding there