Flat Jason is one of the Jason Islands in the north west Falkland Islands[1] . The Jason Islands ( Spanish /Argentine name Islas Sebaldes) are an Archipelago in the Falkland Islands, lying north west of the main island In Spanish it is considered one of "Islas las Llaves" (eastern, Seal Rocks and North Fur Island) [2], such a distinction doesn't exist in English between the two groups of the islands.