The Island of Unst is the most northerly island on Britain.
Ellesmere Island
The most northerly part of the Irish province of Ulster is Malin Head in county Donegal. It is also the most northerly point on the island of Ireland.
Martinique
cayman island
Out Stack... or Muckle Flugga
the most northely island group in the UK is the cook island people
i believe that's ellesmere
it is the most northerly island in the british isles
From the most northerly point of Ellesmere Island to the Pole is 817 kilometres (508 mi).
Boigu Island is the most northerly inhabited island in Australian territory. It is part of the top-western group of the Torres Strait Islands. Cape York, on Cape York Peninsula, Queensland, is the northernmost tip of the Australian mainland.
Darwin is the most northerly of these cities.