Which is the most southerly county in the United Kingdom?

Cornwall is the most southerly county in the United Kingdom.

Cornwall is a ceremonial county in South West England, bordered to the north and west by the Celtic Sea,to the south by the English Channel, and to the east by Devon, the River Tamar forming the border between them. Cornwall is the westernmost part of the South West Peninsula of the island of Great Britain. The southwesternmost point is Land's End and the southernmost Lizard Point. Cornwall has a population of 563,600 and an area of 3,563 km2 (1,376 sq mi).The county has been administered since 2009 by the unitary authority, Cornwall Council. The ceremonial county of Cornwall also includes the Isles of Scilly, which are administered separately. The administrative centre of Cornwall is Truro, its only city.

Cornwall is the homeland of the Cornish people and the cultural and ethnic origin of the Cornish diaspora. It retains a distinct cultural identity that reflects its history, and is recognised as one of the Celtic nations. The Cornish nationalist movement contests the present constitutional status of Cornwall and seeks greater autonomy within the United Kingdom in the form of a devolved legislative Cornish Assembly with powers similar to those in Wales and Scotland.In 2014, Cornish people were granted minority status under the European Framework Convention for the Protection of National Minorities giving them recognition as a distinct ethnic group