sentences:  England, Scotland, and Wales are mostly on the island of Great Britain, and the term "Great Britain" is often used to include the whole of England, Scotland and Wales including their component adjoining islands.Politically, Great Britain and Northern Ireland together constitute the United Kingdom.A single Kingdom of Great Britain resulted from the union of the Kingdom of England (which had already comprised the present-day countries of England and Wales) and the Kingdom of Scotland by the 1707 Acts of Union.