Portsea Island is a flat and low-lying natural island 24.5 square kilometres in area, just off the southern coast of Hampshire in England. The island contains the majority of the city of Portsmouth. Portsea Island has the third-largest population of all the islands in the British Isles after the mainlands of Great Britain and Ireland; it also has the highest populat…
Portsea Island is a flat and low-lying natural island 24.5 square kilometres in area, just off the southern coast of Hampshire in England. The island contains the majority of the city of Portsmouth. Portsea Island has the third-largest population of all the islands in the British Isles after the mainlands of Great Britain and Ireland; it also has the highest population density of any British Isle, and Portsmouth has the highest population density of any city in the UK outside of London.
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