(1) Between Northern Ireland and England Explanation: The Isle of Man, otherwise known simply as Mann, is a self-governing British Crown Dependency, located in the Irish Sea between the islands of Great Britain and Ireland within the British Isle. The closest land is southern Scotland. It is 52 kilometres long and, at its widest point, 22 kilometres wide. The United Kingdom is responsible for the island’s defence and ultimately for good governance, and for representing the island in international forums, while the island’s own parliament and government have competence over all domestic matters.