The ship, which is an official maritime war grave, is carefully protected by the local council, but hundreds of other vessels dotted round the UK coastline do not enjoy the same protection.

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Huge concrete hangars from the 1920s house an interactive, kid-friendly maritime museum complete with a 1936 mine-laying submarine, a British seaplane that saw active duty in World War I and a large aquarium revealing the fishy inhabitants of the Baltic Sea.

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