123. The territorial sea.

123.     The territorial sea.

The United Kingdom is a party to the United Nations Convention on the Law of the Sea1. Part II of this Convention, which reflects in this respect the rules of customary international law, stipulates that the sovereignty of a state extends beyond its land territory and its internal waters to an adjacent belt of sea, described as the territorial sea2. The United Kingdom regards sovereignty over the territorial sea as flowing automatically from sovereignty over the adjacent land under the doctrine of appurtenance3. The sovereignty of the coastal state