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Portsea Island is a small, flat and low-lying island just off the south coast of England. The island is totally within, and contains a large proportion of, the city of Portsmouth. The third largest by population of any island in the British Isles after the mainlands of Great Britain and Ireland, it has the highest population density. To the east lies Langstone Harbour, and to the west is Portsmouth Harbour. To the south, it faces into the Spithead area of the wider Solent. A narrow channel, known as Portsbridge Creek, separates the island from the mainland. Three road bridges (the M275 motorway, the A3 and the A2030), a pedestrian and cycle bridge, and a rail bridge connect the island to the mainland, and a small road bridge joins it to Whale Island. In addition there are ferry services to Gosport (on the mainland) and the Isle of Wight. It gives its name to a relatively commercial and historic neighbourhood, adjoining the south-western "city centre", Portsea, which has had variable use in local government but has long been a parish of the island. == History == There have been two Bronze Age hoards found on the island. A hoard of Roman coins has also been found. In 979AD the island was raided by Danes. At the time of the Domesday Book 3 manors were recorded as being on the island. ''For later history see History of Portsmouth'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Portsea Island」の詳細全文を読む スポンサード リンク
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