The Northern Isles, which consist of the two island groups of Shetland and Orkney, have been inhabited since prehistoric times but were formally annexed by the Norwegian king Harald Hårfagre in around 875 after he subdued the Vikings who used the islands as a base from which to raid Norway and Scotland.
21st November 1974: The Birmingham pub bombings kill 21 people and injure 182
21st November 2020