The Falkland Islands will hold a referendum on its "political status", with the aim of sending a message to Argentina and ending the sovereignty dispute.
The announcement of the poll comes ahead of tomorrow's 30th anniversary of the end of the 74-day occupation by the Galtieri junta in 1982.
The Argentine President, Cristina Fernandez de Kirchner, is due to raise the issue at the United Nations, part of a ratcheting up of tension over the disputed islands.
The British and Falkland Islands Governments have accused Buenos Aires of trying to impose an economic blockade on the islands. Argentina has been turning away cruise ships flying the British flag and is taking legal action against five UK oil firms exploring the islands' coastline.
The referendum is similar to the action taken by Gibraltar in 2002, in which the idea of Britain sharing sovereignty with Spain was rejected by 98.5 per cent of the population.