This article gives general characteristic of the constitutional status of the overseas territories of the UK, show the directions of cooperation between the UK and the overseas territories. The author has made some conclusions on the flexibility and quality differentiation of constitutional and legal approaches of the organization of the political-territorial structure of the UK. The political and territorial relations between the UK and relevant overseas territory were proposed to classify as unitary with the elements of federalism. The author has confirmed the actuality of the question of the constitutional concretization of the competences of the Governor of St. Helena, Ascension Island, Tristan da Cunha. In order to provide a more complete account of interests of population of the overseas territories was raised the problem of the lack of constitutional provisions on the appointment of the Administrators on Ascension Island and Tristan da Cunha with the opinion formed by elected Councils. The position on the advisability of the constitutional consolidation of the form and order of consideration of the interests of the Islands of Saint Helena, Ascension Island and Tristan da Cunha in the government of the Kingdom, as well as when considering the UK Parliament of legislative acts on issues relating to the whole Commonwealth was argued.