England is the largest of the four "home nations" that make up the United Kingdom. It is also the most populous of the four with almost 52 million inhabitants (roughly 84% of the total population of the UK). On the island of Great Britain, Scotland sits to the north of England and Wales is to the west. Northern Ireland (also part of the UK) and the Republic of Ireland lie across the Irish Sea to west of England (and Wales). France and the Channel Islands are across the English Channel to the south, and to the east is the North Sea.