Tristan da Cunha is part of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha. This includes Saint Helena and equatorial <answer>Ascension Island</answer> some 3,730 kilometres (2,318 mi) to the north of Tristan. The island has a population of 267 as of January 2016.
what other island is included in the territory?
Ascension Island