Answer:
The United Kingdom of Great Britain and Northern Ireland is a political entity made up of England, Scotland, Wales, Northern Ireland and most of the small islands.
Its name is often said as "Britain," "The United Kingdom," or just "The UK."
The common use of "England" may refer erroneously or incorrectly to the whole of Great Britain.
The British Isles
There is a difference between a geographic description of a place and a Political description. For example, the geographic area called "North America" is politically divided into Canada, The United States of America, and Mexico. Generically, however, the US is often referred to as "America".
"The British Isles" is the geographic name for the group of Islands off the North West coast of Europe which includes Great Britain, the largest island, Ireland and over 1000 smaller islands.
The island of "Great Britain" is divided into Scotland in the north, England to the south, and Wales to the west.
The Island of "Ireland" is divided into The Republic of Ireland in the south and the six counties of Northern Ireland in the north.
In conclusion, the United Kingdom (UK) comprises England, Scotland, Wales and Northern Ireland.