Northern Ireland issue with Ireland (historic peace agreement signed 10 April 1998); Gibraltar issue with Spain; Argentina claims Falkland Islands (Islas Malvinas); Argentina claims South Georgia and the South Sandwich Islands; Mauritius and the Seychelles claim Chagos Archipelago (UK-administered British Indian Ocean Territory); Rockall continental shelf dispute involving Denmark and Iceland; territorial claim in Antarctica (British Antarctic Territory) overlaps Argentine claim and partially overlaps Chilean claim; disputes with Iceland, Denmark, and Ireland over the Faroe Islands continental shelf boundary outside 200 NM