British Antarctic Territory (the United Kingdom of Great Britain and Northern Ireland)

The United Kingdom claims Antarctica from 80 degrees west to 20 degrees west, but its claim are in abeyance. Chile's and Argentina's claims overlap the British ones. Only the part east of 25 degrees is undisputed. The territory also includes the South Orkney and South Shetland Islands.

Antarctic claims by Chile and the UK only
Antarctic claims by Argentina, Chile and the UK, or by Argentina and the UK
continental claim by the UK only
South Orkney and South Shetland Islands

Other broad topics

the United Kingdom and its possessions