Isles of Scilly Isles of Scilly The Isles of Scilly (; or "") is an archipelago off the southwestern tip of Cornwall. One of the islands, St Agnes, is the most southerly point in both England and the United Kingdom, being over further south than the most southerly point of the British mainland at Lizard Point. The population of all the islands at the 2011 census was 2,203. Scilly forms part of the ceremonial county of Cornwall, and some services are combined with those of Cornwall. However, since 1890, the islands have had a separate local authority. Since the passing of the Isles
History of Cornwall on the later development of stone-built fortified homesteads known in Cornwall as "Rounds". In the wake of the Roman withdrawal from Great Britain in about 410, Saxons and other Germanic peoples were able to conquer and settle most of the east of the island over the next two centuries. In the west, Devon and Cornwall held out as the British kingdom of Dumnonia. Dumnonia had close cultural contacts with Christian Ireland, Wales, Romano-Celtic Brittany and Byzantium via the West Atlantic trade network, and there is exceptional archaeological evidence for Late Antique trading contacts at the stronghold of Tintagel in Cornwall.