For 20 points, name this isolated islet in the North Atlantic, some 300 kilometers west of St. Kilda.
As a planned 2011 expedition to this place has been postponed, SAS member Tom McClean's record of 39 days spent here in 1985 will stand for now. In 1997 it was briefly occupied by Greenpeace, who temporarily renamed it "Waveland." It lies near Hasselwood Rock and Helen's Reef are near this site, which is a permanent home to no mammals but does support nesting Black Guillemots and Northern Gannets if waves don't wash over it. This island had been annexed in 1955 in the final territorial expansion of the British Empire, but it is currently contested by three other countries: Denmark, Ireland, and Iceland. For 20 points, name this isolated islet in the North Atlantic, some 300 kilometers west of St. Kilda.
As a planned 2011 expedition to this place has been postponed, SAS member Tom McClean's record of 39 days spent here in 1985 will stand for now.
Rockall